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Wang Y, Ma H, Liu J, Zhang Z, Yu Y, Zuo S. Broad-spectrum hybrid-driven triple-interface Z-Scheme 1T/2H phase sailboat-like molybdenum disulfide (MoS 2)/protonated N-defect nanoporous graphitic carbon nitride (g-C 3N 4) nanosheets piezo-photocatalyst: Superior degradation and hydrogen evolution. J Colloid Interface Sci 2024; 665:655-680. [PMID: 38552582 DOI: 10.1016/j.jcis.2024.03.145] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2023] [Revised: 03/08/2024] [Accepted: 03/21/2024] [Indexed: 04/17/2024]
Abstract
Incorporating piezo-response into photocatalysis holds great promise for eco-friendly strategies in environmental remediation and sustainable energy conversion. Herein, flexible N-defect nanoporous g-C3N4 nanosheets (NPCNs) was prepared via one-step method, then whose surface was protonated. And existed dense 1T/2H phase and vertical interfaces in non-layer-dependent-piezo-response sailboat-like-MoS2 (Sv-MS) formed by in-situ stresses during nucleation and growth by experiments and MD-simulations. Noble-metal-free Z-scheme PC/VM heterojunction with broad-spectrum absorption, enhanced piezo-response and intimate triple-interface was established by electrostatic self-assembly, performing efficient hybrid-driven piezo-photocatalysis. With a systematic modification of morphology, grain size, phase composition, and surface condition of the components, the optimal PC(3.6H)/VM(u2) exhibited high piezo-photocatalytic rates for degradation of organic dyes and antibiotic (RhB (0.565 min-1), MO (0.052 min-1), MB (1.557 min-1), TC (0.062 min-1)) and hydrogen evolution (3528 μmolg-1h-1) under visible-light and ultrasonic-wave, with maintenance under NIR-light (λmax = 1000 nm) attributed to up-conversion effect (RhB: 0.212 min-1, H2: 2355 μmolg-1h-1). Furthermore, the piezo-photocatalytic mechanism was proposed by experiments and DFT-calculations for effective triple-interface Z-Scheme charge migration. This work provides a rational protocol for constructing diverse-energy-triggered, multiple-interfaces and broad-solar-spectrum (UV-Vis-NIR) piezo-photocatalysts in degradation and hydrogen evolution.
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Affiliation(s)
- Yimeng Wang
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 15 North Third Ring Road East, Chaoyang District, Beijing, People's Republic of China
| | - Hecheng Ma
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 15 North Third Ring Road East, Chaoyang District, Beijing, People's Republic of China
| | - Jianjun Liu
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 15 North Third Ring Road East, Chaoyang District, Beijing, People's Republic of China.
| | - Ziang Zhang
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 15 North Third Ring Road East, Chaoyang District, Beijing, People's Republic of China
| | - Yingchun Yu
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 15 North Third Ring Road East, Chaoyang District, Beijing, People's Republic of China
| | - Shengli Zuo
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 15 North Third Ring Road East, Chaoyang District, Beijing, People's Republic of China
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Qi Y, Zhou G, Wu Y, Wang H, Yan Z, Wu Y. In-situ construction of In 2O 3/In 2S 3-CdIn 2S 4 Z-scheme heterojunction nanotubes for enhanced photocatalytic hydrogen production. J Colloid Interface Sci 2024; 664:107-116. [PMID: 38460376 DOI: 10.1016/j.jcis.2024.03.033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2024] [Revised: 02/29/2024] [Accepted: 03/05/2024] [Indexed: 03/11/2024]
Abstract
Semiconductor photocatalysis was considered as an ideal solution to energy shortages. Herein, a novel ternary In2O3/In2S3-CdIn2S4 (IOSC) nanotube (NTs) photocatalyst was successfully constructed via in situ growth of In2S3 and CdIn2S4 nanosheets onto In2O3 skeleton. It was used for the efficient and stable photo-production of hydrogen from water splitting. The rationally designed IOSC NTs displayed significantly enhanced photocatalytic H2 production under visible light irradiation (≥420 nm), with the highest H2 yield determined to be 2892 μmol·g-1, which is much higher than that of pristine In2S3 and In2O3/In2S3 (IOS) NTs. Cyclic testing has shown that the IOSC2 product remains stable after four cycles of repeated use. The enhanced photocatalytic activity was contributed by its tightly bound tube-nanosheets heterogeneous structure and superior light absorption. Photoelectrons transfer in IOSC2 follows a Z-scheme mechanism, which greatly facilitates its utilization of photogenerated electrons and prevents CdIn2S4 from undergoing photo-corrosion affecting material stability. This work demonstrates the key role of in situ growth in the interface design of ternary heterostructures.
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Affiliation(s)
- Yige Qi
- College of Environment and Ecology, Hunan Agricultural University, Changsha 410128, PR China
| | - Guoxi Zhou
- College of Environment and Ecology, Hunan Agricultural University, Changsha 410128, PR China
| | - Yunchao Wu
- College of Environment and Ecology, Hunan Agricultural University, Changsha 410128, PR China
| | - Hou Wang
- Key Laboratory of Environment Biology and Pollution Control, College of Environmental Science and Engineering, Hunan University, Changsha, 410082, PR China
| | - Zhiyong Yan
- College of Environment and Ecology, Hunan Agricultural University, Changsha 410128, PR China
| | - Yan Wu
- College of Environment and Ecology, Hunan Agricultural University, Changsha 410128, PR China.
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Reza Amani-Ghadim A, Dadkhah S, Abdouss M, Khataee A, Sattari S, Fattahi M. Development of a novel Z-scheme Co xNi 1-xTiO 3/CdS (x = 0.5) photocatalyst for the efficient degradation of organic pollutants via a visible-light-driven photocatalytic process. J Colloid Interface Sci 2024; 663:1035-1051. [PMID: 38452545 DOI: 10.1016/j.jcis.2024.03.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2023] [Revised: 02/29/2024] [Accepted: 03/01/2024] [Indexed: 03/09/2024]
Abstract
Herein, for the first time, we reported the synthesis of a novel Z-scheme CoxNi1-xTiO3/CdS (x = 0.5) heterojunction photocatalyst and the investigation of its visible-light-driven photocatalytic performance toward degradation of methylene blue (MB). The developed photocatalyst was structurally characterized by applying X-Ray diffraction analysis (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), Brunauer-Emmett-Teller (BET), differential reflectance spectroscopy (DRS), and photoluminescence (PL) techniques. The results indicated the formation of a highly porous structure with improved visible light adsorption capacity, favorable for the catalytic activity. At an optimum condition of 10 mg/L of MB and 300 mg/L of catalyst, the ternary photocatalyst demonstrated a MB removal efficiency of 99 % after 75 min of the treatment process. The radical trapping experiments unveiled that hydroxyl and superoxide radicals were two main reactive species formed under visible light, while the valance holes possessed an insignificant role. The synergetic impact of the CoxNi1-xTiO3 (x = 0.5) and CdS on the photodegradation of MB over the as-prepared CoxNi1-xTiO3/CdS (x = 0.5) photocatalyst through Z-scheme photocatalysis was indicated by the results of the mechanism studies. The percentage impact of the treatment time, MB concentration, the ratio of CoxNi1-xTiO3/CdS (x = 0.5), and the dosage of catalyst using analysis of the CCD modeling was obtained as 47.04, 16.67, 7.22 and 0.87 %, respectively. Furthermore, the as-synthesized photocatalyst possessed high recyclability and photostability with only a 3 % decline in activity after four repetitive cycles.
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Affiliation(s)
- Ali Reza Amani-Ghadim
- Applied Chemistry Research Laboratory, Department of Chemistry, Faculty of Basic Science, Azarbaijan Shahid Madani University (ASMU), Tabriz 53751-71379, Iran; New Technologies in the Environment Research Center, Azarbaijan Shahid Madani University (ASMU), Tabriz 53751-71379, Iran.
| | - Shadi Dadkhah
- Department of Chemistry, Amirkabir University of Technology, 15875-4413 Tehran, Iran
| | - Majid Abdouss
- Department of Chemistry, Amirkabir University of Technology, 15875-4413 Tehran, Iran
| | - Alireza Khataee
- Research Laboratory of Advanced Water and Wastewater Treatment Processes, Department of Applied Chemistry, Faculty of Chemistry, University of Tabriz, 51666-16471 Tabriz, Iran; Department of Environmental Engineering, Gebze Technical University, 41400 Gebze, Turkey
| | - Shabnam Sattari
- Applied Chemistry Research Laboratory, Department of Chemistry, Faculty of Basic Science, Azarbaijan Shahid Madani University (ASMU), Tabriz 53751-71379, Iran
| | - Mehdi Fattahi
- Institute of Research and Development, Duy Tan University, Da Nang, Vietnam; School of Engineering & Technology, Duy Tan University, Da Nang, Vietnam.
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Sun H, Jia X, Cao J, Chen S, Chen Y, Lin H. Oxygen vacancies synergistic cobalt phosphide electron bridge modulated bismuth oxychloride/carbon nitride Z-scheme junction for efficient carbon dioxide reduction coupled with tetracycline oxidation. J Colloid Interface Sci 2024; 661:150-163. [PMID: 38295697 DOI: 10.1016/j.jcis.2024.01.149] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Revised: 01/04/2024] [Accepted: 01/21/2024] [Indexed: 02/27/2024]
Abstract
Although great progress has been made with respect to electron bridges, the electron mobility of the state-of-the-art electron bridges is far from satisfactory because of weak electrical conductivity. To overcome the above issue, cobalt phosphide (CoP), as a model electron bridge, was modified by superficial oxygen vacancies (OVs) and embedded into a defective bismuth oxychloride/carbon nitride (BiO1-xCl/g-C3N4) Z-scheme heterojunction to obtain atomic-level insights into the effect of surface OVs on CoP electron bridges. Compared to BiO1-xCl/g-C3N4 and bismuth oxychloride/cobalt phosphide/carbon nitride (BiOCl/CoP/g-C3N4) composites, the defective bismuth oxychloride/cobalt phosphide/carbon nitride (BiO1-xCl/CoP/g-C3N4) heterojunction exhibited remarkable photocatalytic redox performance, indicating that the surface OVs-assisted CoP electron bridge effectively boosted electrical conductivity and yielded ultrafast electron transfer rates. The theoretical and experimental results demonstrate that the surface OVs play a critical role in improving the electrical conductivity of the CoP electron bridge, thereby accelerating electron mobility. This research provides insights into interfacial OVs-modified transition metal phosphide (TMP) electron bridges and their potential application in heterojunctions for energy crisis mitigation and environmental remediation.
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Affiliation(s)
- Haoyu Sun
- Key Laboratory of Green and Precise Synthetic and Applications, Ministry of Education, College of Chemistry and Materials Science, Key Laboratory of Clean Energy and Green Cycle, Huaibei Normal University, Huaibei, Anhui 235000, PR China
| | - Xuemei Jia
- Key Laboratory of Green and Precise Synthetic and Applications, Ministry of Education, College of Chemistry and Materials Science, Key Laboratory of Clean Energy and Green Cycle, Huaibei Normal University, Huaibei, Anhui 235000, PR China.
| | - Jing Cao
- Key Laboratory of Green and Precise Synthetic and Applications, Ministry of Education, College of Chemistry and Materials Science, Key Laboratory of Clean Energy and Green Cycle, Huaibei Normal University, Huaibei, Anhui 235000, PR China
| | - Shifu Chen
- Key Laboratory of Green and Precise Synthetic and Applications, Ministry of Education, College of Chemistry and Materials Science, Key Laboratory of Clean Energy and Green Cycle, Huaibei Normal University, Huaibei, Anhui 235000, PR China
| | - Yong Chen
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, PR China
| | - Haili Lin
- Key Laboratory of Green and Precise Synthetic and Applications, Ministry of Education, College of Chemistry and Materials Science, Key Laboratory of Clean Energy and Green Cycle, Huaibei Normal University, Huaibei, Anhui 235000, PR China; Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, PR China.
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5
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Mehta D, Naik Y, Modi N, Parmar PR, Thakor PB. Optoelectronic and photocatalytic behaviour of a type-II GaAlS2/HfS2 heterostructure: Ab initio study. Nanotechnology 2024. [PMID: 38670075 DOI: 10.1088/1361-6528/ad43f3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/28/2024]
Abstract
Theoretical examination based on first principle computation has been conducted for van der Waals heterostructure (vdwHS) GaAlS2/HfS2 including structural, optoelectronic and photocatalytic characteristics. From the adhesion energy calculation, the AB configuration of GaAlS2/HfS2 vdwHS is the most stable. A type-II GaAlS2/HfS2 vdwHS is a dynamically and thermally stable structure. The band edge position, projected band, and projected charge densities verify the type-II alignment of GaAlS2/HfS2 vdwHS. For GaAlS2/HfS2, GaAlS2 is acting as a donor and HfS2 is acting as an acceptor ensured by the charge density difference plot. The electron localized function validates the weak van der Waals interaction between GaAlS2 and HfS2. The GaAlS2/HfS2 vdwHS possess an indirect bandgap of 1.54 eV with notable absorption in the visible range. The findings assure that the GaAlS2/HfS2 vdwHS is an efficient photocatalyst for pH 4 to 8. The band alignment of GaAlS2/HfS2 is suitable for z-scheme charge transfer. The strain influenced band edge suggests that the GaAlS2/HfS2 vdwHS remains photocatalytic for strain -4% to +6% in both cases of uniaxial and biaxial strains.
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Affiliation(s)
- Disha Mehta
- Department of Physics, Veer Narmad South Gujarat University Department of Physics, Udhna magdalla road, surat, Surat, Gujarat, 395007, INDIA
| | - Yashasvi Naik
- Department of Physics, Veer Narmad South Gujarat University Department of Physics, Udhna magdalla road, surat, Surat, Gujarat, 395007, INDIA
| | - Nidhi Modi
- Department of Physics, Sir P.T. Sarvajanik Collage of Science, Surat 395001, Gujarat, India, Athawalines, Surat, 395001, INDIA
| | - P R Parmar
- Department of Physics, Veer Narmad South Gujarat University Department of Physics, Udhna magdalla road, surat, Surat, Gujarat, 395007, INDIA
| | - Pankajsinh B Thakor
- Department of Physics, Veer Narmad South Gujarat University Department of Physics, Surat, Gujarat 395007, Surat, Gujarat, 395007, INDIA
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Wang H, Zhang X, Zhang W, Zhou M, Jiang HL. Heteroatom-Doped Ag 25 Nanoclusters Encapsulated in Metal-Organic Frameworks for Photocatalytic Hydrogen Production. Angew Chem Int Ed Engl 2024; 63:e202401443. [PMID: 38407530 DOI: 10.1002/anie.202401443] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2024] [Revised: 02/02/2024] [Accepted: 02/20/2024] [Indexed: 02/27/2024]
Abstract
Atomically precise metal nanoclusters (NCs) with unique optical properties and abundant catalytic sites are promising in photocatalysis. However, their light-induced instability and the difficulty of utilizing the photogenerated carriers for photocatalysis pose significant challenges. Here, MAg24 (M=Ag, Pd, Pt, and Au) NCs doped with diverse single heteroatoms have been encapsulated in a metal-organic framework (MOF), UiO-66-NH2, affording MAg24@UiO-66-NH2. Strikingly, compared with Ag25@UiO-66-NH2, the MAg24@UiO-66-NH2 doped with heteroatom exhibits much enhanced activity in photocatalytic hydrogen production, among which AuAg24@UiO-66-NH2 presents the best activity up to 3.6 mmol g-1 h-1, far superior to all other counterparts. Moreover, they display excellent photocatalytic recyclability and stability. X-ray photoelectron spectroscopy and ultrafast transient absorption spectroscopy demonstrate that MAg24 NCs encapsulated into the MOF create a favorable charge transfer pathway, similar to a Z-scheme heterojunction, when exposed to visible light. This promotes charge separation, along with optimized Ag electronic state, which are responsible for the superior activity in photocatalytic hydrogen production.
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Affiliation(s)
- He Wang
- Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
- Department of Chemistry, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
| | - Xiyuan Zhang
- Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
- Department of Chemistry, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
| | - Wei Zhang
- Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
| | - Meng Zhou
- Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
| | - Hai-Long Jiang
- Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
- Department of Chemistry, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
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Hsu HT, Lin SY, Lu YT, Chuang YY, Chuang SH. Enhanced Fenton-like process over Z-scheme MoO 3 surface decorated with Fe 2O 3 under visible light. Sci Rep 2024; 14:8007. [PMID: 38580673 PMCID: PMC10997789 DOI: 10.1038/s41598-024-58634-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2024] [Accepted: 04/01/2024] [Indexed: 04/07/2024] Open
Abstract
Photocatalysts consisting of Z-scheme heterojunctions are commonly used in wastewater treatment due to their exceptional reactivity in photocatalysis and highly efficient visible-light utilization. In this work, Fe2O3-decorated MoO3 rods were synthesized through a two-step method and their photodegradation of methylene blue (MB) was evaluated. The Fe2O3/MoO3 rods were characterized by XRD, SEM, micro-Raman, XPS, UV-Vis DRS, and PL to investigate their structural, morphological, and optical properties. The results indicate that the photodegradation efficiency of Fe2O3/MoO3 improved through a reduction in the gap energy and persistence of a 1D hexagonal prism structure. The degradation rate of MB was enhanced from 31.7 to 91.5% after irradiation for 180 min owing to electron-hole separation and Fenton-like process. Formation of the OH radical is a key factor in the photodegradation reaction and with the addition of H2O2 the efficiency can further improve via a Fenton-like mechanism. Furthermore, the Z-scheme mechanism concurrently delineated. The Fe2O3/MoO3 rod composites were also found to retain high photocatalytic efficiency after being reused five times, which may be useful for future applications.
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Affiliation(s)
- Hsien-Tse Hsu
- Department of Applied Chemistry, National University of Kaohsiung, Kaohsiung, 81148, Taiwan
| | - Shao-Ying Lin
- Department of Applied Chemistry, National University of Kaohsiung, Kaohsiung, 81148, Taiwan
| | - Ya-Ting Lu
- Department of Chemical and Materials Engineering, National University of Kaohsiung, Kaohsiung, 81148, Taiwan
| | - Yao-Yuan Chuang
- Department of Applied Chemistry, National University of Kaohsiung, Kaohsiung, 81148, Taiwan.
| | - Shiow-Huey Chuang
- Department of Applied Chemistry, National University of Kaohsiung, Kaohsiung, 81148, Taiwan.
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Bao T, Tang C, Li S, Qi Y, Zhang J, She P, Rao H, Qin JS. Hollow structured CdS@ZnIn 2S 4 Z-scheme heterojunction for bifunctional photocatalytic hydrogen evolution and selective benzylamine oxidation. J Colloid Interface Sci 2024; 659:788-798. [PMID: 38215615 DOI: 10.1016/j.jcis.2023.12.175] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2023] [Revised: 11/22/2023] [Accepted: 12/29/2023] [Indexed: 01/14/2024]
Abstract
Photocatalytic hydrogen evolution (PHE) is frequently constrained by inadequate light utilization and the rapid combination rate of the photogenerated electron-hole pairs. Additionally, conventional PHE processes are often facilitated by the addition of sacrificial reagents to consume photo-induced holes, which makes this approach economically unfavorable. Herein, we designed a spatially separated bifunctional cocatalyst decorated Z-scheme heterojunction of hollow structured CdS (HCdS) @ZnIn2S4 (ZIS), which was prepared by a sacrificial hard template method followed by photo-deposition. Consequently, PdOx@HCdS@ZIS@Pt exhibited efficient PHE (86.38 mmol·g-1·h-1) and benzylamine (BA) oxidation coupling (164.75 mmol·g-1·h-1) with high selectivity (97.34 %). The unique hollow core-shelled morphology and bifunctional cocatalyst loading in this work hold great potential for the design and synthesis of bifunctional Z-scheme photocatalysts.
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Affiliation(s)
- Tengfei Bao
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, International Center of Future Science, Jilin University, 2699 Qianjin Street, Changchun 130012, PR China; Key Laboratory of Surface and Interface Chemistry of Jilin Province, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, PR China
| | - Chenxi Tang
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, International Center of Future Science, Jilin University, 2699 Qianjin Street, Changchun 130012, PR China; Key Laboratory of Surface and Interface Chemistry of Jilin Province, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, PR China
| | - Shuming Li
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, International Center of Future Science, Jilin University, 2699 Qianjin Street, Changchun 130012, PR China; Key Laboratory of Surface and Interface Chemistry of Jilin Province, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, PR China
| | - Yuanyuan Qi
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, International Center of Future Science, Jilin University, 2699 Qianjin Street, Changchun 130012, PR China
| | - Jing Zhang
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, International Center of Future Science, Jilin University, 2699 Qianjin Street, Changchun 130012, PR China
| | - Ping She
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, International Center of Future Science, Jilin University, 2699 Qianjin Street, Changchun 130012, PR China; Key Laboratory of Surface and Interface Chemistry of Jilin Province, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, PR China
| | - Heng Rao
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, International Center of Future Science, Jilin University, 2699 Qianjin Street, Changchun 130012, PR China.
| | - Jun-Sheng Qin
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, International Center of Future Science, Jilin University, 2699 Qianjin Street, Changchun 130012, PR China
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Wang Y, Lu N, Quan X. Surface-surface contacted direct Z-scheme TiO 2-BiVO 4-PI heterostructure for enhanced photoelectrocatalytic degradation of bisphenols under solar driven. Chemosphere 2024; 351:141210. [PMID: 38244869 DOI: 10.1016/j.chemosphere.2024.141210] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/03/2023] [Revised: 12/06/2023] [Accepted: 01/12/2024] [Indexed: 01/22/2024]
Abstract
Bisphenols (BPs) are a series of widely used endocrine disruptors, which potentially harm the environment and human health. In this work, a novel Z-scheme TiO2-BiVO4-PI heterostructure was synthesized, characterized, and used for the simulated sunlight-driven photoelectrocatalytic degradation of BPs. Due to the existence of surface-surface contacted direct Z-scheme between BiVO4 and PI, holes were concentrated on the valence band of BiVO4 and electrons were concentrated on the conduction band of PI, resulting in a stronger redox activity. All six BPs exhibited appreciable degradation following the order of bisphenol A (BPA, 93.5%) > bisphenol B (BPB, 92.7%) > bisphenol AP (BPAP, 85.6%) > bisphenol F (BPF, 75.9%) > bisphenol AF (BPAF, 69.8%) > bisphenol S (BPS, 39.2%), within 120 min under the optimal condition. In the process of degradation, superoxide radicals (·O2-) and hydroxyl radicals (·OH) played dominant roles, and the intermediates of BPs degradation were mainly formed via the substituent shedding or C-C bond breaking of phenol ring, hydroxylation, and ring opening of phenol ring. The ECOSAR program was used to analyze the changes in the toxicity of the intermediates, and it was proved that the toxicity showed a decrease trend during the degradation process. This study provides a Z-scheme mechanism for TiO2-BiVO4-PI, which can degrade BPs and reduce their toxicity effectively.
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Affiliation(s)
- Yaqi Wang
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, China), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China; School of Environment, Northeast Normal University, Changchun 130117, China
| | - Nan Lu
- School of Environment, Northeast Normal University, Changchun 130117, China
| | - Xie Quan
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, China), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China.
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Lauwaert J, Jacob NT. Compact Model and Detailed Balance Limit for a Dual n-Type Direct Z-Scheme Heterojunction. Small 2024:e2307712. [PMID: 38342677 DOI: 10.1002/smll.202307712] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Subscribe] [Scholar Register] [Received: 09/04/2023] [Revised: 01/11/2024] [Indexed: 02/13/2024]
Abstract
This paper presents a comprehensive study on a compact model and the detailed balance limit for a dual n-type direct Z-scheme heterojunction. The compact model developed in this work describes the current-voltage (IV) characteristics of the staggered heterojunction under one-sided illumination. The model incorporates charge neutrality, surface recombination, thermionic emission over the barrier, and surface potentials. By considering these factors, the IV curve of the staggered heterojunction is captured, shedding light on the charge transfer and separation processes within the device. The heterojunction device consists of two photosystems: photosystem one (PSI) with a wide band gap and photosystem two (PSII) with a narrow band gap. Furthermore, the paper establishes the detailed balance limit for the efficiency of the dual n-type direct Z-scheme heterojunction. The maximum achievable efficiency, estimated to be 11.4%, is determined by the interplay between the band gap of PSII and the empirical relation for the maximum barrier for electrons leaving PSII. This detailed balance limit represents the highest efficiency that can be attained, accounting for carrier generation, recombination, and charge transfer mechanisms. The compact model and the derived detailed balance limit provide insights for designing and improving the performance of direct Z-scheme heterojunctions.
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Affiliation(s)
- Johan Lauwaert
- Department of Electronics and Information Systems, Ghent University, Technology Park 126, Zwijnaarde, 9052, Belgium
| | - Nithin Thomas Jacob
- Department of Electronics and Information Systems, Ghent University, Technology Park 126, Zwijnaarde, 9052, Belgium
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11
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Fu H, Deng Y, Cai Z, Pan Y, Yang L, Fujita T, Wang N, Wang Y, Wang X. Designing Z-scheme In 2O 3 @ZnIn 2S 4 core-shell heterojunctions for enhanced photocatalytic multi-pollutant removal. J Hazard Mater 2024; 463:132820. [PMID: 37898084 DOI: 10.1016/j.jhazmat.2023.132820] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Revised: 07/30/2023] [Accepted: 10/19/2023] [Indexed: 10/30/2023]
Abstract
In water bodies, the coexistence of and interaction between multiple pollutants complicate remediation. In this study, the In2O3 @ZnIn2S4 Z-scheme heterojunction with a stratified core-shell structure was constructed and used to remove multiple pollutants (tetracycline hydrochloride and Cr(VI)). The large number of active sites and the mechanism of photogenerated charge separation ensured the substantially enhanced catalytic activity of this photocatalyst, making it superior to In2O3 nanospheres and pure ZnIn2S4. The optimised In2O3 @ZnIn2S4 nano-flowers (In2O3 @ZnIn2S4 NFs) realised 99.8% removal of tetracycline hydrochloride and 100% removal of Cr(VI) within 60 min under visible-light. The material's high stability was demonstrated by five experiment cycles. Effects of organics, inorganics, and pH about the photocatalytic performance of the optimised In2O3 @ZnIn2S4 NFs when tetracycline hydrochloride and Cr(VI) coexist were also explored. Finally, the intermediates and degradation pathways were analysed, and the possible photocatalytic mechanism was also investigated by performing density functional theory calculations.
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Affiliation(s)
- Hao Fu
- School of Chemistry & Chemical Engineering, Guangxi University, Nanning 530004, PR China; School of Resources, Environment and Materials, Guangxi University, Nanning 530004, PR China; State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Nanning 530004, PR China
| | - Yuxiang Deng
- School of Resources, Environment and Materials, Guangxi University, Nanning 530004, PR China; State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Nanning 530004, PR China
| | - Zhenyu Cai
- School of Resources, Environment and Materials, Guangxi University, Nanning 530004, PR China; State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Nanning 530004, PR China
| | - Yuehua Pan
- School of Resources, Environment and Materials, Guangxi University, Nanning 530004, PR China; State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Nanning 530004, PR China
| | - Libo Yang
- School of Resources, Environment and Materials, Guangxi University, Nanning 530004, PR China; State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Nanning 530004, PR China
| | - Toyohisa Fujita
- School of Resources, Environment and Materials, Guangxi University, Nanning 530004, PR China
| | - Nannan Wang
- School of Resources, Environment and Materials, Guangxi University, Nanning 530004, PR China
| | - Youbin Wang
- School of Resources, Environment and Materials, Guangxi University, Nanning 530004, PR China
| | - Xinpeng Wang
- School of Resources, Environment and Materials, Guangxi University, Nanning 530004, PR China; State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Nanning 530004, PR China.
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12
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Wang F, Jiang L, Zhang G, Ye Z, He Q, Li J, Li P, Chen Y, Zhou X, Shang R. Novel Ag-Bridged Z-Scheme CdS/Ag/Bi 2WO 6 Heterojunction: Excellent Photocatalytic Performance and Insight into the Underlying Mechanism. Nanomaterials (Basel) 2024; 14:315. [PMID: 38334586 PMCID: PMC10857298 DOI: 10.3390/nano14030315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/30/2023] [Revised: 01/30/2024] [Accepted: 02/02/2024] [Indexed: 02/10/2024]
Abstract
The construction of semiconductor heterojunction photocatalysts that improve the separation and transfer of photoinduced charge carriers is an effective and widely employed strategy to boost photocatalytic performance. Herein, we have successfully constructed a CdS/Ag/Bi2WO6 Z-scheme heterojunction with an Ag-bridge as an effective charge transfer channel by a facile process. The heterostructure consists of both CdS and Ag nanoparticles anchored on the surface of Bi2WO6 nanosheets. The photocatalytic efficiency of the CdS/Ag/Bi2WO6 system was studied by the decontamination of tetracycline (TC) and Rhodamine B (RhB) under visible light irradiation (λ ≥ 420). The results exhibited that CdS/Ag/Bi2WO6 shows markedly higher photocatalytic performance than that of CdS, Bi2WO6, Ag/Bi2WO6, and CdS/Bi2WO6. The trapping experiment results verified that the •O2- and h+ radicals are the key active species. The results of photoluminescence spectral analysis and photocurrent responses indicated that the CdS/Ag/Bi2WO6 heterojunctions exhibit exceptional efficiency in separating and transferring photoinduced electron-hole pairs. Based on a series of characterization results, the boosted photocatalytic activity of the CdS/Ag/Bi2WO6 system is mostly due to the successful formation of the Ag-bridged Z-scheme heterojunction; these can not only inhibit the recombination rate of photoinduced charge carriers but also possess a splendid redox capacity. The work provides a way for designing a Z-scheme photocatalytic system based on Ag-bridged for boosting photocatalytic performance.
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Affiliation(s)
- Fangzhi Wang
- School of Resources and Environmental Engineering, Shandong Agriculture and Engineering University, Jinan 250100, China; (L.J.); (G.Z.); (Z.Y.); (Q.H.); (J.L.); (P.L.); (Y.C.); (X.Z.); (R.S.)
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13
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Gadore V, Mishra SR, Ahmaruzzaman M. Bandgap engineering approach for synthesising photoactive novel Ag/HAp/SnS 2 for removing toxic anti-fungal pharmaceutical from aqueous environment. J Hazard Mater 2024; 461:132458. [PMID: 37717444 DOI: 10.1016/j.jhazmat.2023.132458] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Revised: 08/13/2023] [Accepted: 08/30/2023] [Indexed: 09/19/2023]
Abstract
The present work shed light on synthesising a novel ternary Z-scheme Ag/HAp/SnS2 (AHS) nano photocatalyst to degrade metronidazole (MTZ) in wastewater through H2O2-assisted AOP under natural sunlight. HAp extracted from the fish scales of rohu fish through alkaline treatment was decorated with Ag nanoparticles using ascorbic acid as a bio-reductant. Tin disulphide (SnS2) was anchored over Ag/HAp to prevent agglomeration and enhance photocatalytic activity by delaying the electron-hole recombination rate. After 45 min of irradiation, a degradation efficiency of 98.85 ± 1.86% for 15 ppm MTZ could be achieved. The performance of the prepared photocatalyst in real wastewater was investigated by introducing several metal cations and anions in the photodegradation process. The degradation products were identified by HRLCMS analysis, and the breakdown mechanism of MTZ was proposed. The present study enlightens the importance of SnS2-based photocatalysts for organic pollutant degradation under natural sunlight through an advanced oxidation process. The characterization results showed that the enhanced photodegradation efficiency of AHS is attributed to the formation of an all-solid-state Z-scheme heterojunction with Ag nanoparticles acting as charge transfer medium and as electron accumulators helping in delaying charge recombination.
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Affiliation(s)
- Vishal Gadore
- Department of Chemistry, National Institute of Technology, Silchar 788010, Assam, India
| | - Soumya Ranjan Mishra
- Department of Chemistry, National Institute of Technology, Silchar 788010, Assam, India
| | - Md Ahmaruzzaman
- Department of Chemistry, National Institute of Technology, Silchar 788010, Assam, India.
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14
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Sharma J, Dhiman P, Kumar A, Sharma G. Advances in photocatalytic NO oxidation by Z-scheme heterojunctions. Environ Res 2024; 240:117431. [PMID: 37866538 DOI: 10.1016/j.envres.2023.117431] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Revised: 10/09/2023] [Accepted: 10/15/2023] [Indexed: 10/24/2023]
Abstract
The fast development of urbanisation and industrialisation has led to a rise in nitrogen oxide (NOx) emissions, specifically nitric oxide (NO). One effective method for reducing the harmful effects of this dangerous air pollutant on both human health and the environment is the photocatalytic oxidation of NO. Z-scheme heterojunctions enhance incident light utilisation and increase photocatalytic activity, eventually leading to better NO oxidation performance by encouraging the effective separation of charges and migration. A comprehensive discussion of Z-scheme-based heterojunctions is provided in this review paper, with a focus on their applications in the photocatalytic oxidation of NO. Significant progress has been made in the fabrication of efficient photocatalytic devices in recent years, with Z-scheme-based heterojunctions proving to be particularly successful. The review looks into the various methodologies used to create Z-scheme-based heterojunctions as well as photocatalytic NO oxidation mechanisms. Recent studies on photocatalysts employing Z-scheme heterojunctions for the photocatalytic oxidation of NO are also discussed. The possibilities for new opportunities as well as the present challenges, barriers, advances, and solutions have been emphasized.
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Affiliation(s)
- Jayati Sharma
- International Research Centre of Nanotechnology for Himalayan Sustainability (IRCNHS), Shoolini University, India
| | - Pooja Dhiman
- International Research Centre of Nanotechnology for Himalayan Sustainability (IRCNHS), Shoolini University, India.
| | - Amit Kumar
- International Research Centre of Nanotechnology for Himalayan Sustainability (IRCNHS), Shoolini University, India
| | - Gaurav Sharma
- International Research Centre of Nanotechnology for Himalayan Sustainability (IRCNHS), Shoolini University, India
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15
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Wang K, Yu X, Liu Z, Zhang T, Ma Y, Niu J, Yao B. Interface engineering of 0D/2D Cu 2O/BiOBr Z-scheme heterojunction for efficient degradation of sulfamethoxazole: Mechanism, degradation pathway, and DFT calculation. Chemosphere 2024; 346:140596. [PMID: 37918537 DOI: 10.1016/j.chemosphere.2023.140596] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Revised: 09/27/2023] [Accepted: 10/29/2023] [Indexed: 11/04/2023]
Abstract
Constructed heterojunction has been considered an efficient strategy to enhance the migration and transfer of photoinduced charge carriers. Herein, a Z-scheme Cu2O/BiOBr heterojunction with 0D/2D structure was fabricated by microwave hydrothermal method. It was found that the optimal composites photocatalyst showed excellent activity for sulfamethoxazole (SMZ) illumination, and the removal rate reached 90.7%, which was higher than pristine Cu2O (53.0%) and BiOBr (60.0%). Subsequently, the operational parameters such as catalyst dosage, concentrations of pollutants, and pH of solution were investigated. According to the ultraviolet-visible diffuse reflectance spectroscopy (UV-Vis DRs), Mott-Schottky curve, and density functional theory (DFT) analysis, the Z-scheme degradation mechanism of Cu2O/BiOBr heterostructure was proposed. Among them, the interface structure of 0-dimensions/2-dimensions (0D/2D) can significantly increase the number of heterojunctions in the composite catalyst, and Z-scheme heterostructures can accelerate the generation and migration of photoinduced charge carriers, which has a facilitation effect on improving the decomposition activity of the photocatalyst. Moreover, three possible pathways for SMZ degradation were inferred. This study provides a promising strategy for constructing novel heterojunctions with high photocatalytic performance.
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Affiliation(s)
- Kai Wang
- School of Science, Xi'an University of Technology, Xi'an, 710048, China; Material Corrosion and Protection Key Laboratory of Shaanxi Province, Xi'an, 710048, China
| | - Xiaojiao Yu
- School of Science, Xi'an University of Technology, Xi'an, 710048, China; Material Corrosion and Protection Key Laboratory of Shaanxi Province, Xi'an, 710048, China.
| | - Zongbin Liu
- School of Science, Xi'an University of Technology, Xi'an, 710048, China
| | - Ting Zhang
- School of Science, Xi'an University of Technology, Xi'an, 710048, China
| | - Yao Ma
- School of Science, Xi'an University of Technology, Xi'an, 710048, China
| | - Jinfen Niu
- School of Science, Xi'an University of Technology, Xi'an, 710048, China
| | - Binhua Yao
- School of Science, Xi'an University of Technology, Xi'an, 710048, China
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16
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Lin Q, Tan S, Zhao J, Fang X, Wang Y, Wen N, Zhang Z, Ding Z, Yuan R, Yan G, Jin S, Long J. Tunable Band Engineering Management on Perovskite MAPbBr 3 /COFs Nano-Heterostructures for Efficient S-S Coupling Reactions. Small 2024; 20:e2304776. [PMID: 37658502 DOI: 10.1002/smll.202304776] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2023] [Revised: 08/02/2023] [Indexed: 09/03/2023]
Abstract
Efficient artificial photosynthesis of disulfide bonds holds promises to facilitate reverse decoding of genetic codes and deciphering the secrets of protein multilevel folding, as well as the development of life science and advanced functional materials. However, the incumbent synthesis strategies encounter separation challenges arising from leaving groups in the ─S─S─ coupling reaction. In this study, according to the reaction mechanism of free-radical-triggered ─S─S─ coupling, light-driven heterojunction functional photocatalysts are tailored and constructed, enabling them to efficiently generate free radicals and trigger the coupling reaction. Specifically, perovskites and covalent organic frameworks (COFs) are screened out as target materials due to their superior light-harvesting and photoelectronic properties, as well as flexible and tunable band structure. The in situ assembled Z-scheme heterojunction MAPB-M-COF (MAPbBr3 = MAPB, MA+ = CH3 NH2 + ) demonstrates a perfect trade-off between quantum efficiency and redox chemical potential via band engineering management. The MAPB-M-COF achieves a 100% ─S─S─ coupling yield with a record photoquantum efficiency of 11.50% and outstanding cycling stability, rivaling all the incumbent similar reaction systems. It highlights the effectiveness and superiority of application-oriented band engineering management in designing efficient multifunctional photocatalysts. This study demonstrates a concept-to-proof research methodology for the development of various integrated heterojunction semiconductors for light-driven chemical reaction and energy conversion.
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Affiliation(s)
- Qianying Lin
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, 350116, China
| | - Siyi Tan
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, 350116, China
- Province University Key Laboratory of Green Energy and Environment Catalysis, Ningde Normal University, Ningde, 352100, China
| | - Jiwu Zhao
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, 350116, China
| | - Xiao Fang
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, 350116, China
- MOE Key Laboratory for Analytical Science of Food Safety and Biology, Fujian Provincial Key Laboratory of Analysis and Detection Technology for Food Safety, College of Chemistry, Fuzhou University, Fuzhou, 350108, China
| | - Ying Wang
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, 350116, China
| | - Na Wen
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, 350116, China
- College of Materials Science and Engineering, Fuzhou University, Fuzhou, 350116, China
| | - Zizhong Zhang
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, 350116, China
| | - Zhengxin Ding
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, 350116, China
| | - Rusheng Yuan
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, 350116, China
| | - Guiyang Yan
- Province University Key Laboratory of Green Energy and Environment Catalysis, Ningde Normal University, Ningde, 352100, China
| | - Shengye Jin
- State Key Laboratory of Molecular Reaction Dynamics and the Dynamic Research Center for Energy and Environmental Materials, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China
| | - Jinlin Long
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, 350116, China
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Xie Z, Saad A, Shang Y, Wang Y, Luo S, Wei Z. Enhanced degradation of micropollutants by visible light photocatalysts with strong oxygen activation ability. Water Res 2023; 247:120785. [PMID: 37931360 DOI: 10.1016/j.watres.2023.120785] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/25/2023] [Revised: 10/16/2023] [Accepted: 10/23/2023] [Indexed: 11/08/2023]
Abstract
Visible light photocatalysis is widely considered a sustainable approach to break down micropollutants without chemical addition. To promote the output of photogenerated carriers under visible light, a Z-scheme plasmonic photocatalyst Bi-CeO2/Ag0/BiO2 was designed and fabricated to activate dissolved oxygen in water for micropollutant degradation. The doped Bi not only improved the separation of electron-hole, but also narrowed the band gap of CeO2 to enhance its absorption of visible light. Notably, metallic silver (Ag0) works as an electronic transmission vehicle from Bi-CeO2 to BiO2 in a Z-scheme mechanism. Likewise, the surface plasmon resonance effect of Ag0 also enhanced the absorption of visible light. Furthermore, the Bi doping induced abundant surface oxygen vacancies on CeO2 for enhanced capability and selectivity towards O2 adsorption and activation, which favored the generation of O2•- by photogenerated electrons to degrade sulfamethoxazole, enrofloxacin, and bisphenol A. Theoretical calculation results also confirmed the O2•--driven degradation pathway for sulfamethoxazole. Therefore, the Z-scheme Bi-CeO2/Ag0/BiO2 not only extends the photocatalytic reactivity of CeO2-based catalysts to the visible light range, but also provides a chemical-free method to effectively degrade micropollutants.
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Affiliation(s)
- Zhiqun Xie
- Centre for Water Technology (WATEC) & Department of Biological and Chemical Engineering, Aarhus University, Universitetsbyen 36, Aarhus C, 8000 Denmark
| | - Ali Saad
- Centre for Water Technology (WATEC) & Department of Biological and Chemical Engineering, Aarhus University, Universitetsbyen 36, Aarhus C, 8000 Denmark
| | - Yanan Shang
- School of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590, China
| | - Yong Wang
- School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Shuang Luo
- Centre for Water Technology (WATEC) & Department of Biological and Chemical Engineering, Aarhus University, Universitetsbyen 36, Aarhus C, 8000 Denmark; College of Environment and Ecology, Hunan Agricultural University, Changsha 410128, China.
| | - Zongsu Wei
- Centre for Water Technology (WATEC) & Department of Biological and Chemical Engineering, Aarhus University, Universitetsbyen 36, Aarhus C, 8000 Denmark.
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18
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Wang J, Liang K, Wei X, Zhang Y, Chen HX, Yang Y, Liu J, Tian Y, Duan L. Photocatalytic water splitting properties of GeC/InS van der Waals heterostructure: First-principles calculations. J Phys Condens Matter 2023. [PMID: 38035379 DOI: 10.1088/1361-648x/ad1136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/02/2023]
Abstract
Based on first-principles, we conducted an in-depth study of the GeC/InS van der Waals heterostructure formed by GeC and InS and discussed its structure, electronic properties and optical properties. First, we observe that this heterostructure has negative binding energy, indicating that the interlayer interactions are mainly affected by van der Waals forces. Through band structure and density of state analysis, we confirmed its type-II band alignment characteristics, which means that photogenerated carriers have the ability to automatically separate in space. Moreover, the average charge density difference and Bader charge analysis show that there is a built-in electric field in the heterostructure, and further proves that GeC/InS forms a Z-scheme charge transfer mechanism. Interestingly, the band edge position spans the water redox potential and can fully induce the redox reaction of water splitting, indicating that it is a potential photocatalyst. The high light absorption coefficient shown in the absorption spectrum also further confirms its excellent photocatalytic activity. The most striking thing is that the solar hydrogen production efficiency of GeC/InS heterostructure is as high as 44.39%. Our research demonstrates the theoretical basis for GeC/InS heterostructure as a photocatalyst.
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Affiliation(s)
- Jiaxin Wang
- Chang'an University, Chang'an University, Xi'an, Shaanxi, 710064, CHINA
| | - Kanghao Liang
- Chang'an University, Chang'an University, Xi'an, 710064, CHINA
| | - Xing Wei
- school of materials science and engineering, Chang'an University, Chang'an University, Xi'an, 710064, CHINA
| | - Yan Zhang
- School of Materials Science and Engineering, Chang'an University, Chang'an University, Xi'an, Shaanxi, 710061, CHINA
| | - Hua-Xin Chen
- Chang'an University, School of Materials Science and Engineering, Xi'an, 710061, CHINA
| | - Yun Yang
- School of Information Engineering, Chang'an University, The Second Ring Road, Xi'an, 710064, CHINA
| | - Jian Liu
- School of Physics, Shandong University, room C1106, Shandong Province, P.R. CHINA, 230026, Jinan, 250100, CHINA
| | - Ye Tian
- Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing, Beijing, 100864, CHINA
| | - Li Duan
- Chang'an University, Chang'an University, Xi'an, 710064, CHINA
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19
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Zhu LB, Ding SN. Enhancing the Photocatalytic Performance of Antibiotics Using a Z-Scheme Heterojunction of 0D ZnIn 2S 4 Quantum Dots and 3D Hierarchical Inverse Opal TiO 2. Molecules 2023; 28:7174. [PMID: 37894652 PMCID: PMC10609623 DOI: 10.3390/molecules28207174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2023] [Revised: 10/13/2023] [Accepted: 10/17/2023] [Indexed: 10/29/2023] Open
Abstract
Limited light absorption and rapid photo-generated carriers' recombination pose significant challenges to the practical applications of photocatalysts. In this study, we employed an efficient approach by combining the slow-photon effect with Z-scheme charge transfer to enhance the photo-degradation performance of antibiotics. Specifically, we incorporated 0D ZnIn2S4 quantum dots (QDs) into a 3D hierarchical inverse opal (IO) TiO2 structure through a facile one-step process. This combination enhanced the visible light absorption and provided abundant active surfaces for efficient photo-degradation. Moreover, the ZnIn2S4 QDs formed an artificial Z-scheme system with IO-TiO2, facilitating the separation and migration of charge carriers. To achieve a better band alignment with IO-TiO2, we doped Ag into the ZnIn2S4 QDs (Ag: ZIS QDs) to adjust their energy levels. Through an investigation of the different Ag contents in the ZnIn2S4 QDs, we found that the optimal photo-degradation performance was achieved with Ag (2.0): ZIS QDs/IO-TiO2, exhibiting degradation rates 19.5 and 14.8 times higher than those of ZnIn2S4 QDs and IO-TiO2, respectively. This study provides significant insights for elevating the photocatalytic capabilities of IO-TiO2 and broadening its prospective applications.
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Affiliation(s)
| | - Shou-Nian Ding
- School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, China;
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20
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Suganthi S, Vignesh S, Kalyana Sundar J, Alqarni SA, Pandiaraj S, Hwan Oh T. Cobalt oxide coupled with graphitic carbon nitride composite heterojunction for efficient Z-scheme photocatalytic environmental pollutants degradation performance. Environ Res 2023; 235:116574. [PMID: 37423360 DOI: 10.1016/j.envres.2023.116574] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2023] [Revised: 06/21/2023] [Accepted: 07/06/2023] [Indexed: 07/11/2023]
Abstract
The Co3O4/g-C3N4 Z-scheme composite heterojunction has been effectively built in a facile sonication-assisted hydrothermal manner. The as-synthesized optimal 0.2 M Co3O4/g-C3N4 (GCO2) composite photocatalysts (PCs) revealed admirable degradation efficiency towards methyl orange (MO, 65.1%) and methylene blue (MB, 87.9%) organic pollutant compared with bare g-C3N4 within 210 min under light irradiation. Besides, the features of investigating structural, morphological and optical properties have evidence that the unique decoration effect of Co3O4 nanoparticles (NPs) on the g-C3N4 structure with intimate interface heterojunction of well-matched band structures noticeably facilitates the photo-generated charge transport/separation efficiency, reduces the recombination rates and widens the visible-light fascination which could advantageous to upgrading photocatalytic action with superior redox ability. Especially, the probable Z-scheme photocatalytic mechanism pathway is also elucidated in detail based on the quenching results. Hence, this work delivers a facile and hopeful candidate for contaminated water remediation via visible-light photocatalysis over the efficient g-C3N4-based catalysts.
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Affiliation(s)
- Sanjeevamuthu Suganthi
- School of Chemical Engineering, Yeungnam University, Gyeongsan, 38541, Republic of Korea
| | - Shanmugam Vignesh
- Materials Science Research Laboratory, Department of Physics, Periyar University, Salem, 636 011, Tamil Nadu, India.
| | - Jeyaperumal Kalyana Sundar
- Materials Science Research Laboratory, Department of Physics, Periyar University, Salem, 636 011, Tamil Nadu, India
| | | | - Saravanan Pandiaraj
- Department of Self-Development Skills, King Saud University, P.O. Box 2455, Riyadh, 11451, Saudi Arabia
| | - Tae Hwan Oh
- School of Chemical Engineering, Yeungnam University, Gyeongsan, 38541, Republic of Korea.
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Suo S, Ma W, Zhang S, Han Z, Wang Y, Li Y, Xiong Y, Liu Y, He C, Fang P. MOF-Derived Spindle-Shaped Z-Scheme ZnO/ZnFe 2O 4 Heterojunction: A Magnetic Recovery Catalyst for Efficient Photothermal Degradation of Tetracycline Hydrochloride. Materials (Basel) 2023; 16:6639. [PMID: 37895621 PMCID: PMC10608245 DOI: 10.3390/ma16206639] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2023] [Revised: 10/07/2023] [Accepted: 10/09/2023] [Indexed: 10/29/2023]
Abstract
The development of photocatalysts with a wide spectral response and effective carrier separation capability is essential for the green degradation of tetracycline hydrochloride. In this study, a magnetic recyclable Z-scheme ZnO/ZnFe2O4 heterojunction (ZZF) was successfully constructed via the solid phase method, using MIL-88A(Fe)@Zn as the precursor. An appropriate band gap width and Z-scheme charge transfer mechanism provide ZZF with excellent visible light absorption performance, efficient charge separation, and a strong redox ability. Under visible light irradiation, the degradation efficiency of tetracycline hydrochloride for the optimal sample can reach 86.3% within 75 min in deionized water and 92.9% within 60 min in tap water, exhibiting superior stability and reusability after five cycles. Moreover, the catalyst in the water can be conveniently recovered by magnetic force. After visible light irradiation for 70 min, the temperature of the reaction system increased by 21.9 °C. Its degradation constant (35.53 × 10-3 min-1) increased to 5.1 times that at room temperature (6.95 × 10-3 min-1). Using thermal energy enhances the kinetic driving force of the reactants and facilitates carrier migration, meaning that more charge is available for the production of •O2- and •OH. This study provides a potential candidate for the efficient degradation of tetracycline hydrochloride by combining thermal catalysis with a photocatalytic heterojunction.
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Affiliation(s)
- Shilong Suo
- Key Laboratory of Nuclear Solid State Physics Hubei Province, School of Physics and Technology, Wuhan University, Wuhan 430072, China; (S.S.)
| | - Wenmei Ma
- Key Laboratory of Nuclear Solid State Physics Hubei Province, School of Physics and Technology, Wuhan University, Wuhan 430072, China; (S.S.)
| | - Siyi Zhang
- Key Laboratory of Nuclear Solid State Physics Hubei Province, School of Physics and Technology, Wuhan University, Wuhan 430072, China; (S.S.)
| | - Ziwu Han
- Key Laboratory of Nuclear Solid State Physics Hubei Province, School of Physics and Technology, Wuhan University, Wuhan 430072, China; (S.S.)
| | - Yumin Wang
- Key Laboratory of Nuclear Solid State Physics Hubei Province, School of Physics and Technology, Wuhan University, Wuhan 430072, China; (S.S.)
| | - Yuanyuan Li
- Key Laboratory of Nuclear Solid State Physics Hubei Province, School of Physics and Technology, Wuhan University, Wuhan 430072, China; (S.S.)
| | - Yi Xiong
- Department of Microelectronics, School of Mathematical & Physical Sciences, Wuhan Textile University, Wuhan 430073, China
| | - Yong Liu
- Key Laboratory of Nuclear Solid State Physics Hubei Province, School of Physics and Technology, Wuhan University, Wuhan 430072, China; (S.S.)
| | - Chunqing He
- Key Laboratory of Nuclear Solid State Physics Hubei Province, School of Physics and Technology, Wuhan University, Wuhan 430072, China; (S.S.)
| | - Pengfei Fang
- Key Laboratory of Nuclear Solid State Physics Hubei Province, School of Physics and Technology, Wuhan University, Wuhan 430072, China; (S.S.)
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22
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Chang Y, Suo K, Wang Y, Ren X, Cao J. In 2S 3@TiO 2/In 2S 3 Z-Scheme Heterojunction with Synergistic Effect for Enhanced Photocathodic Protection of Steel. Molecules 2023; 28:6554. [PMID: 37764330 PMCID: PMC10536402 DOI: 10.3390/molecules28186554] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2023] [Revised: 09/05/2023] [Accepted: 09/07/2023] [Indexed: 09/29/2023] Open
Abstract
In this work, a TiO2/In2S3 heterojunction film was successfully synthesized using a one-step hydrothermal method and applied in the photocathodic protection (PCP) of 304SS. The octahedral In2S3 and In2S3@TiO2 nanoparticles combined and coexisted with each other, with In2S3 quantum dots growing on the surface of TiO2 to form In2S3@TiO2 with a wrapping structure. The composite photoelectrode, which includes TiO2 with a mixed crystalline phase and In2S3, exhibited significantly enhanced PCP performance for 304SS compared with pure In2S3 and TiO2. The In2S3@TiO2/In2S3 composites with 0.3 g of P25 titanium dioxide (P25) showed the best protection performance, resulting in a cathodic shift of its OCP coupled with 304SS to -0.664 VAgCl. The electron transfer tracking results demonstrate that In2S3@TiO2/In2S3 forms a Z-scheme heterojunction structure. The enhanced PCP performance could be attributed to the synergistic effect of the mixed crystalline phase and the Z-scheme heterojunction system. The mixed crystalline phase of TiO2 provides more electrons, and these electrons are gathered at higher energy potentials in the Z-scheme system. Additionally, the built-in electric field further promotes the more effective electrons transfer from photoelectrode to the protected metals, thus, leading to enhanced photoelectrochemical cathodic protection of 304SS.
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Affiliation(s)
- Yue Chang
- Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, China
- National Materials Corrosion and Protection Data Center, University of Science and Technology Beijing, Beijing 100083, China
- BRI Southeast Asia Network for Corrosion and Protection (MOE), Shunde Innovation School, University of Science and Technology Beijing, Foshan 528399, China
| | - Kaili Suo
- Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, China
| | - Yuhang Wang
- Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, China
| | - Xiaona Ren
- Institute of Powder Metallurgy and Advanced Ceramics, School of Materials and Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Jiangli Cao
- Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, China
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23
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Wei Y, Zhang Z, Wang W, Song Z, Cai M, Sun S. Photocatalytic Z-scheme Overall Water Splitting: Insight into Different Optimization Strategies for Powder Suspension and Particulate Sheet Systems. Chemphyschem 2023; 24:e202300216. [PMID: 37232190 DOI: 10.1002/cphc.202300216] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2023] [Revised: 05/23/2023] [Accepted: 05/25/2023] [Indexed: 05/27/2023]
Abstract
Achieving solar light-driven photocatalytic overall water splitting is the ideal and ultimate goal for solving energy and environment issues. Photocatalytic Z-scheme overall water splitting has undergone considerable development in recent years; specific approaches include a powder suspension Z-scheme system with a redox shuttle and a particulate sheet Z-scheme system. Of these, a particulate sheet has achieved a benchmark solar-to-hydrogen efficiency exceeding 1.1 %. Nevertheless, owing to intrinsic differences in the components, structure, operating environment, and charge transfer mechanism, there are several differences between the optimization strategies for a powder suspension and particulate sheet Z-scheme. Unlike a powder suspension Z-scheme with a redox shuttle, the particulate sheet Z-scheme system is more like a miniaturized and parallel p/n photoelectrochemical cell. In this review, we summarize the optimization strategies for a powder suspension Z-scheme with a redox shuttle and particulate sheet Z-scheme. In particular, attention has been focused on choosing appropriate redox shuttle and electron mediator, facilitating the redox shuttle cycle, avoiding redox mediator-induced side reactions, and constructing a particulate sheet. Challenges and prospects in the development of efficient Z-scheme overall water splitting are also briefly discussed.
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Affiliation(s)
- Yuxue Wei
- School of Chemistry and Chemical Engineering, Anhui University, Hefei, Anhui, 230601, China
| | - Zhiyuan Zhang
- School of Chemistry and Chemical Engineering, Anhui University, Hefei, Anhui, 230601, China
| | - Wenjing Wang
- School of Chemistry and Chemical Engineering, Anhui University, Hefei, Anhui, 230601, China
| | - Zhimin Song
- Department of Chemistry, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Mengdie Cai
- School of Chemistry and Chemical Engineering, Anhui University, Hefei, Anhui, 230601, China
| | - Song Sun
- School of Chemistry and Chemical Engineering, Anhui University, Hefei, Anhui, 230601, China
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Zhu LB, Bao N, Zhang Q, Ding SN. Synergistically Enhanced Photocatalytic Degradation by Coupling Slow-Photon Effect with Z-Scheme Charge Transfer in CdS QDs/IO-TiO 2 Heterojunction. Molecules 2023; 28:5437. [PMID: 37513309 PMCID: PMC10385498 DOI: 10.3390/molecules28145437] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2023] [Revised: 07/11/2023] [Accepted: 07/13/2023] [Indexed: 07/30/2023] Open
Abstract
Lower light absorption and faster carrier recombination are significant challenges in photocatalysis. This study introduces a novel approach to address these challenges by anchoring cadmium sulfide quantum dots (CdS QDs) on inverse opal (IO)-TiO2, which increases light absorption and promotes carriers' separation by coupling slow-photon effect with Z-scheme charge transfer. Specifically, the IO-TiO2 was created by etching a polystyrene opal template, which resulted in a periodic structure that enhances light absorption by reflecting light in the stop band. The size of CdS quantum dots (QDs) was regulated to achieve appropriate alignment of energy bands between CdS QDs and IO-TiO2, promoting carrier transfer through alterations in charge transfer modes and resulting in synergistic-amplified photocatalysis. Theoretical simulations and electrochemical investigations demonstrated the coexistence of slow-photon effects and Z-scheme transfer. The system's photodegradation performance was tested using rhodamine B as a model. This novel hierarchical structure of the Z-scheme heterojunction exhibits degradability 7.82 and 4.34 times greater than pristine CdS QDs and IO-TiO2, respectively. This study serves as a source of inspiration for enhancing the photocatalytic capabilities of IO-TiO2 and broadening its scope of potential applications.
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Affiliation(s)
- Li-Bang Zhu
- School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, China
| | - Ning Bao
- School of Public Health, Nantong University, Nantong 226019, China
| | - Qing Zhang
- Chinese Academy of Inspection and Quarantine, Beijing 100176, China
| | - Shou-Nian Ding
- School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, China
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25
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Gong W, Yao S, Liang Y, Chen B, Yang Y, Luo X, Yu T, Yuan C, Yang Y. In-situ construction of direct Z-scheme NiO/Bi 2MoO 6 heterostructure arrays with enhanced room temperature ether sensing properties under visible light irradiation. J Hazard Mater 2023; 458:131936. [PMID: 37385099 DOI: 10.1016/j.jhazmat.2023.131936] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Revised: 06/12/2023] [Accepted: 06/23/2023] [Indexed: 07/01/2023]
Abstract
Light irradiation has emerged as a promising strategy to promote room temperature sensing of resistive-type semiconductor gas sensors recently. However, high recombination rate of photo-generated carriers and poor visible light response of conventional semiconductor sensing materials have greatly limited the further performance improvement. It is urgent to develop gas sensing materials with high photo-generated carrier separation efficiency and excellent visible light response. Herein, a novel direct Z-scheme NiO/Bi2MoO6 heterostructure arrays were designed and in-situ constructed on alumina flat substrate to form thin film sensors, which realized excellent room temperature gas response towards ether under irradiation of visible light for the first time, together with excellent stability and selectivity. Based on density functional theory calculation and experimental characterization, it was demonstrated that the construction of Z-scheme heterostructure could greatly promote the separation of photo-generated carriers and adsorption of ether. Moreover, the excellent visible light response characteristics of NiO/Bi2MoO6 could improve the utilization of visible light. In addition, the in-situ construction of array structure could avoid a series of problems caused by the conventional thick film devices. The work not only provides a promising guideline for Z-scheme heterostructure arrays in promoting the room temperature sensing performance of semiconductors gas sensors under visible light irradiation, but also clarifies the gas sensing mechanism of Z-scheme heterostructure at the atomic and electronic level.
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Affiliation(s)
- Wufei Gong
- Jiangxi Key Laboratory of Nanomaterials and Sensors, Jiangxi Key Laboratory of Photoelectronics and Telecommunication, School of Physics, Communication and Electronics, Jiangxi Normal University, Nanchang 330098, Jiangxi, PR China
| | - Shenman Yao
- Jiangxi Key Laboratory of Nanomaterials and Sensors, Jiangxi Key Laboratory of Photoelectronics and Telecommunication, School of Physics, Communication and Electronics, Jiangxi Normal University, Nanchang 330098, Jiangxi, PR China
| | - Yan Liang
- Department of Artificial Intelligence, Jiangxi University of Technology, Nanchang 330022, Jiangxi, PR China
| | - Bin Chen
- Key Laboratory of Materials Physics and Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei 230031, PR China; Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230026, PR China
| | - Yanxing Yang
- Department of Physics, New Jersey Institute of Technology, Newark, NJ, 07102-1982, USA
| | - Xingfang Luo
- Jiangxi Key Laboratory of Nanomaterials and Sensors, Jiangxi Key Laboratory of Photoelectronics and Telecommunication, School of Physics, Communication and Electronics, Jiangxi Normal University, Nanchang 330098, Jiangxi, PR China
| | - Ting Yu
- Jiangxi Key Laboratory of Nanomaterials and Sensors, Jiangxi Key Laboratory of Photoelectronics and Telecommunication, School of Physics, Communication and Electronics, Jiangxi Normal University, Nanchang 330098, Jiangxi, PR China
| | - Cailei Yuan
- Jiangxi Key Laboratory of Nanomaterials and Sensors, Jiangxi Key Laboratory of Photoelectronics and Telecommunication, School of Physics, Communication and Electronics, Jiangxi Normal University, Nanchang 330098, Jiangxi, PR China
| | - Yong Yang
- Jiangxi Key Laboratory of Nanomaterials and Sensors, Jiangxi Key Laboratory of Photoelectronics and Telecommunication, School of Physics, Communication and Electronics, Jiangxi Normal University, Nanchang 330098, Jiangxi, PR China.
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26
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Lu C, Cao D, Zhang H, Gao L, Shi W, Guo F, Zhou Y, Liu J. Boosted Tetracycline and Cr(VI) Simultaneous Cleanup over Z-Scheme WO 3/CoO p-n Heterojunction with 0D/3D Structure under Visible Light. Molecules 2023; 28:4727. [PMID: 37375282 DOI: 10.3390/molecules28124727] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2023] [Revised: 06/02/2023] [Accepted: 06/08/2023] [Indexed: 06/29/2023] Open
Abstract
In this study, a Z-Scheme WO3/CoO p-n heterojunction with a 0D/3D structure was designed and prepared via a simple solvothermal approach to remove the combined pollution of tetracycline and heavy metal Cr(VI) in water. The 0D WO3 nanoparticles adhered to the surface of the 3D octahedral CoO to facilitate the construction of Z-scheme p-n heterojunctions, which could avoid the deactivation of the monomeric material due to agglomeration, extend the optical response range, and separate the photogenerated electronhole pairs. The degradation efficiency of mixed pollutants after a 70 min reaction was significantly higher than that of monomeric TC and Cr(VI). Among them, a 70% WO3/CoO heterojunction had the best photocatalytic degradation effect on the mixture of TC and Cr(VI) pollutants, and the removing rate was 95.35% and 70.2%, respectively. Meanwhile, after five cycles, the removal rate of the mixed pollutants by the 70% WO3/CoO remained almost unchanged, indicating that the Z-scheme WO3/CoO p-n heterojunction has good stability. In addition, for an active component capture experiment, ESR and LC-MS were employed to reveal the possible Z-scheme pathway under the built-in electric field of the p-n heterojunction and photocatalytic removing mechanism of TC and Cr(VI). These results offer a promising idea for the treatment of the combined pollution of antibiotics and heavy metals by a Z-scheme WO3/CoO p-n heterojunction photocatalyst, and have broad application prospects: boosted tetracycline and Cr(VI) simultaneous cleanup over a Z-scheme WO3/CoO p-n heterojunction with a 0D/3D structure under visible light.
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Affiliation(s)
- Changyu Lu
- Hebei Province Collaborative Innovation Center for Sustainable Utilization of Water Resources and Optimization of Industrial Structure, Hebei Province Key Laboratory of Sustained Utilization & Development of Water Recourse, School of Water Resource and Environment, Hebei Geo University, Shijiazhuang 050031, China
| | - Delu Cao
- Hebei Province Collaborative Innovation Center for Sustainable Utilization of Water Resources and Optimization of Industrial Structure, Hebei Province Key Laboratory of Sustained Utilization & Development of Water Recourse, School of Water Resource and Environment, Hebei Geo University, Shijiazhuang 050031, China
| | - Hefan Zhang
- Hebei Province Collaborative Innovation Center for Sustainable Utilization of Water Resources and Optimization of Industrial Structure, Hebei Province Key Laboratory of Sustained Utilization & Development of Water Recourse, School of Water Resource and Environment, Hebei Geo University, Shijiazhuang 050031, China
| | - Luning Gao
- Hebei Province Collaborative Innovation Center for Sustainable Utilization of Water Resources and Optimization of Industrial Structure, Hebei Province Key Laboratory of Sustained Utilization & Development of Water Recourse, School of Water Resource and Environment, Hebei Geo University, Shijiazhuang 050031, China
| | - Weilong Shi
- School of Material Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, China
| | - Feng Guo
- Hebei Province Collaborative Innovation Center for Sustainable Utilization of Water Resources and Optimization of Industrial Structure, Hebei Province Key Laboratory of Sustained Utilization & Development of Water Recourse, School of Water Resource and Environment, Hebei Geo University, Shijiazhuang 050031, China
- School of Material Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, China
| | - Yahong Zhou
- Hebei Province Collaborative Innovation Center for Sustainable Utilization of Water Resources and Optimization of Industrial Structure, Hebei Province Key Laboratory of Sustained Utilization & Development of Water Recourse, School of Water Resource and Environment, Hebei Geo University, Shijiazhuang 050031, China
| | - Jiahao Liu
- Hebei Province Collaborative Innovation Center for Sustainable Utilization of Water Resources and Optimization of Industrial Structure, Hebei Province Key Laboratory of Sustained Utilization & Development of Water Recourse, School of Water Resource and Environment, Hebei Geo University, Shijiazhuang 050031, China
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27
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Zabelin D, Severa K, Kuliček J, Rezek B, Tulupova A, Elashnikov R, Zabelina A, Burtsev V, Sajdl P, Miliutina E, Svorcik V, Lyutakov O. Creation and Plasmon-Assisted Photosensitization of Annealed Z-Schemes for Sunlight-Only Water Splitting. ACS Appl Mater Interfaces 2023. [PMID: 37279106 DOI: 10.1021/acsami.3c02884] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Solely light-induced water splitting represents a promising avenue for a carbon-free energy future, based on reliable energy sources. Such processes can be performed using coupled semiconductor materials (the so-called direct Z-scheme design) that facilitate spatial separation of (photo)excited electrons and holes, prevent their recombination, and allow water-splitting half-reactions proceeding at each corresponding semiconductor side. In this work, we proposed and prepared a specific structure, based on WO3g-x/CdWO4/CdS coupled semiconductors, created by annealing of a common WO3/CdS direct Z-scheme. WO3-x/CdWO4/CdS flakes were further combined with a plasmon-active grating for the creation of the so-called artificial leaf design, making possible complete utilization of the sunlight spectrum. The proposed structure enables water splitting with high production of stoichiometric amounts of oxygen and hydrogen without undesirable catalyst photodegradation. Several control experiments confirm the creation of electrons and holes participating in the water splitting half-reaction in a spatially selective manner.
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Affiliation(s)
- Denis Zabelin
- Department of Solid State Engineering, University of Chemistry and Technology, 16628 Prague, Czech Republic
| | - Kamil Severa
- Department of Solid State Engineering, University of Chemistry and Technology, 16628 Prague, Czech Republic
| | - Jaroslav Kuliček
- Faculty of Electrical Engineering, Czech Technical University in Prague, 16627 Prague, Czech Republic
| | - Bohuslav Rezek
- Faculty of Electrical Engineering, Czech Technical University in Prague, 16627 Prague, Czech Republic
| | - Anastasiia Tulupova
- Department of Solid State Engineering, University of Chemistry and Technology, 16628 Prague, Czech Republic
| | - Roman Elashnikov
- Department of Solid State Engineering, University of Chemistry and Technology, 16628 Prague, Czech Republic
| | - Anna Zabelina
- Department of Solid State Engineering, University of Chemistry and Technology, 16628 Prague, Czech Republic
| | - Vasilii Burtsev
- Department of Solid State Engineering, University of Chemistry and Technology, 16628 Prague, Czech Republic
| | - Petr Sajdl
- Department of Solid State Engineering, University of Chemistry and Technology, 16628 Prague, Czech Republic
| | - Elena Miliutina
- Department of Solid State Engineering, University of Chemistry and Technology, 16628 Prague, Czech Republic
| | - Vaclav Svorcik
- Department of Solid State Engineering, University of Chemistry and Technology, 16628 Prague, Czech Republic
| | - Oleksiy Lyutakov
- Department of Solid State Engineering, University of Chemistry and Technology, 16628 Prague, Czech Republic
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Wang W, Yang D, Mou Y, Liao L, Wang S, Guo L, Wang X, Li Z, Zhou W. Construction of 2D/2D Mesoporous WO 3/CeO 2 Laminated Heterojunctions for Optimized Photocatalytic Performance. Nanomaterials (Basel) 2023; 13:nano13111798. [PMID: 37299701 DOI: 10.3390/nano13111798] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Revised: 05/29/2023] [Accepted: 06/01/2023] [Indexed: 06/12/2023]
Abstract
Photocatalytic elimination of antibiotics from the environment and drinking water is of great significance for human health. However, the efficiency of photoremoval of antibiotics such as tetracycline is severely limited by the prompt recombination of electron holes and slow charge migration efficacy. Fabrication of low-dimensional heterojunction composites is an efficient method for shortening charge carrier migration distance and enhancing charge transfer efficiency. Herein, 2D/2D mesoporous WO3/CeO2 laminated Z-scheme heterojunctions were successfully prepared using a two-step hydrothermal process. The mesoporous structure of the composites was proved by nitrogen sorption isotherms, in which sorption-desorption hysteresis was observed. The intimate contact and charge transfer mechanism between WO3 nanoplates and CeO2 nanosheets was investigated using high-resolution transmission electron microscopy and X-ray photoelectron spectroscopy measurements, respectively. Photocatalytic tetracycline degradation efficiency was noticeably promoted by the formation of 2D/2D laminated heterojunctions. The improved photocatalytic activity could be attributed to the formation of Z-scheme laminated heterostructure and 2D morphology favoring spatial charge separation, confirmed by various characterizations. The optimized 5WO3/CeO2 (5 wt.% WO3) composites can degrade more than 99% of tetracycline in 80 min, achieving a peak TC photodegradation efficiency of 0.0482 min-1, which is approximately 3.4 times that of pristine CeO2. A Z-scheme mechanism is proposed for photocatalytic tetracycline by from WO3/CeO2 Z-scheme laminated heterojunctions based on the experimental results.
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Affiliation(s)
- Wenjie Wang
- Shandong Provincial Key Laboratory of Molecular Engineering, School of Chemistry and Chemical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China
| | - Decai Yang
- Shandong Provincial Key Laboratory of Molecular Engineering, School of Chemistry and Chemical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China
| | - Yifan Mou
- Shandong Provincial Key Laboratory of Molecular Engineering, School of Chemistry and Chemical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China
| | - Lijun Liao
- Shandong Provincial Key Laboratory of Molecular Engineering, School of Chemistry and Chemical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China
| | - Shijie Wang
- Shandong Provincial Key Laboratory of Molecular Engineering, School of Chemistry and Chemical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China
| | - Liping Guo
- Shandong Provincial Key Laboratory of Molecular Engineering, School of Chemistry and Chemical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China
| | - Xuepeng Wang
- Shandong Provincial Key Laboratory of Molecular Engineering, School of Chemistry and Chemical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China
| | - Zhenzi Li
- Shandong Provincial Key Laboratory of Molecular Engineering, School of Chemistry and Chemical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China
| | - Wei Zhou
- Shandong Provincial Key Laboratory of Molecular Engineering, School of Chemistry and Chemical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China
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29
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Liang K, Wang J, Wei X, Zhang Y, Fan J, Ni L, Yang Y, Liu J, Tian Y, Wang X, Yuan C, Duan L. Tunable electronic and optical properties of MoTe 2/InSe heterostructure via external electric field and strain engineering. J Phys Condens Matter 2023; 35. [PMID: 37158122 DOI: 10.1088/1361-648x/acd09b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2023] [Accepted: 04/26/2023] [Indexed: 05/10/2023]
Abstract
Based on first-principles calculation under density functional theory, the geometry, electronic and optical properties of the MoTe2/InSe heterojunction have been investigated. The results reveal that the MoTe2/InSe heterojunction has a typical type-Ⅱ band alignment and exhibits an indirect bandgap of 0.99 eV. In addition, the Z-scheme electron transport mechanism is capable of efficiently separating photogenerated carriers. The bandgap of the heterostructure changes regularly under applied electric field and exhibits a significant Giant Stark effect. Under an applied electric field of 0.5 V Å-1, the band alignment of the heterojunction shifts from type-Ⅱ to type-I. The application of strain produced comparable changes in the heterojunction. More importantly, the transition from semiconductor to metal is completed in the heterostructure under the applied electric field and strain. Furthermore, the MoTe2/InSe heterojunction retains the optical properties of two monolayers and produces greater light absorption on this basis, especially for UV light. The above results offer a theoretical basis for the application of MoTe2/InSe heterostructure in the next generation of photodetectors.
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Affiliation(s)
- Kanghao Liang
- School of Materials Science and Engineering, Chang'an University, Xi'an 710064, People's Republic of China
| | - Jing Wang
- School of Materials Science and Engineering, Chang'an University, Xi'an 710064, People's Republic of China
| | - Xing Wei
- School of Materials Science and Engineering, Chang'an University, Xi'an 710064, People's Republic of China
| | - Yan Zhang
- School of Materials Science and Engineering, Chang'an University, Xi'an 710064, People's Republic of China
| | - Jibin Fan
- School of Materials Science and Engineering, Chang'an University, Xi'an 710064, People's Republic of China
| | - Lei Ni
- School of Materials Science and Engineering, Chang'an University, Xi'an 710064, People's Republic of China
| | - Yun Yang
- School of Information Engineering, Chang'an University, Xi'an 710064, People's Republic of China
| | - Jian Liu
- School of Physics, Shandong University, Jinan 250100, People's Republic of China
| | - Ye Tian
- Institute of Physics, Chinese Academy of Sciences, Beijing 100190, People's Republic of China
| | - Xuqiang Wang
- School of Materials Science and Engineering, Chang'an University, Xi'an 710064, People's Republic of China
| | - Chongrong Yuan
- School of Materials Science and Engineering, Chang'an University, Xi'an 710064, People's Republic of China
| | - Li Duan
- School of Materials Science and Engineering, Chang'an University, Xi'an 710064, People's Republic of China
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He Z, Yang H, Wong NH, Ernawati L, Sunarso J, Huang Z, Xia Y, Wang Y, Su J, Fu X, Wu M. Construction of Cu 7 S 4 @CuCo 2 O 4 Yolk-Shell Microspheres Composite and Elucidation of Its Enhanced Photocatalytic Activity, Mechanism, and Pathway for Carbamazepine Degradation. Small 2023; 19:e2207370. [PMID: 36765447 DOI: 10.1002/smll.202207370] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2022] [Revised: 01/18/2023] [Indexed: 05/04/2023]
Abstract
Water pollution caused by the massive use of medicines has caused significant environmental problems. This work first reports the synthesis and characterization of the Cu7 S4 /CuCo2 O4 (CS/CCO) yolk-shell microspheres via hydrothermal and annealing methods, and then investigates their photocatalytic performance in removing organic water pollutants. The 10-CS/CCO composite with yolk-shell microspheres exhibits the highest photodegradation rate of carbamazepine (CBZ), reaching 96.3% within 2 h. The 10-CS/CCO also demonstrates more than two times higher photodegradation rates than the pure (Cu7 S4 ) CS and (CuCo2 O4 ) CCO. This outstanding photocatalytic performance can be attributed to the unique yolk-shell structure and the Z-scheme charge transfer pathway, reducing multiple reflections of the acting light. These factors enhance the light absorption efficiency and efficiently transfer photoexcited charge carriers. In-depth, photocatalytic degradation pathways of CBZ are systematically evaluated via the identification of degradation intermediates with Fukui index calculation. The insights gained from this work can serve as a guideline for developing low-cost and efficient Z-scheme photocatalyst composites with the yolk-shell structure.
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Affiliation(s)
- Zuming He
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing, 210098, P. R. China
- Huaide School, Changzhou University, Jingjiang, 214500, P. R. China
- School of Microelectronics and Control Engineering, Changzhou University, Changzhou, 213164, P. R. China
| | - Hanpei Yang
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing, 210098, P. R. China
| | - Ngie Hing Wong
- Research Centre for Sustainable Technologies, Faculty of Engineering, Computing and Science, Swinburne University of Technology, Jalan Simpang Tiga, Kuching, Sarawak, 93350, Malaysia
| | - Lusi Ernawati
- Department of Chemical Engineering, Institut Teknologi Kalimantan, Balikpapan, 76127, Indonesia
| | - Jaka Sunarso
- Research Centre for Sustainable Technologies, Faculty of Engineering, Computing and Science, Swinburne University of Technology, Jalan Simpang Tiga, Kuching, Sarawak, 93350, Malaysia
| | - Zhengyi Huang
- Huaide School, Changzhou University, Jingjiang, 214500, P. R. China
| | - Yongmei Xia
- School of Materials and Engineering, Jiangsu University of Technology, Changzhou, 213001, P. R. China
| | - Yong Wang
- School of Pharmaceutical and Materials Engineering, Taizhou University, Jiaojiang, 318000, P. R. China
| | - Jiangbin Su
- School of Microelectronics and Control Engineering, Changzhou University, Changzhou, 213164, P. R. China
| | - Xiaofei Fu
- School of Materials and Engineering, Jiangsu University of Technology, Changzhou, 213001, P. R. China
| | - Mi Wu
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing, 210098, P. R. China
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Ai C, Wang B, Duan K, Jiang J, Jiang Z, Hu S, Luo B, Ma L, Jing D. Enhanced photocatalytic activity by regulating charge transferring: Unveiling the decisive role of cerium oxide crystal-facet engineering over heterojunction. J Colloid Interface Sci 2023; 636:341-350. [PMID: 36638573 DOI: 10.1016/j.jcis.2022.12.139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2022] [Revised: 12/21/2022] [Accepted: 12/26/2022] [Indexed: 12/30/2022]
Abstract
Heterojunctions have been verified to be effective for separation of photogenerated electrons and holes, therefore improving the photocatalytic efficiency. Meanwhile, cerium oxide (CeO2) is an ideal semiconductor for studying the influence of different exposed crystal facets on regulation of electron transport pathways over heterojunctions. Herein, various kinds of crystal facet-dependent CeO2/g-C3N4 (graphitic carbon nitride) heterojunctions have been successfully engineered as representative model catalysts, and their critical role in regulating charge transfer pathways has been confirmed by systemic characterizations. It was found that facet-dependent heterojunctions followed different charge transport pathways, leading to different H2 evolution activities. In detail, heterojunctions with (100) and (110) exposed surfaces followed the Z-scheme transport pathways, while heterojunction with (111) exposed surface followed the type-II pathway. The H2 evolution rates via these three kinds of heterojunctions were determined to be 3.084, 1.925, and 1.128 mmol·g-1·h-1, respectively, which were 13.3, 7.9, 4.2 times that of bare g-C3N4. It's revealed that the different exposed crystal facets of CeO2 with different Fermi levels determine the transport pathways of photogenerated carriers. This work shows an example of controlling photocatalytic activity by facet-dependent heterojunctions and reveals the importance role of crystal-facet engineering toward heterojunction construction, which is expected to provide an important guidance for the design of new photocatalytic systems.
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Affiliation(s)
- Chaoqian Ai
- International Research Center for Renewable Energy & State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China
| | - Baoji Wang
- Gree Altairnano Inc., Zhuhai 519040, China
| | - Ke Duan
- Gree Altairnano Inc., Zhuhai 519040, China
| | | | - Zeyu Jiang
- State Key Laboratory of Multiphase Flow in Power Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China
| | - Songwei Hu
- International Research Center for Renewable Energy & State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China
| | - Bing Luo
- School of Chemical Engineering and Technology, Xi'an Jiaotong University, Xi'an 710049, China
| | - Lijing Ma
- International Research Center for Renewable Energy & State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China.
| | - Dengwei Jing
- International Research Center for Renewable Energy & State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China
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Zheng S, Du H, Yang L, Tan M, Li N, Fu Y, Hao D, Wang Q. PDINH bridged NH 2-UiO-66(Zr) Z-scheme heterojunction for promoted photocatalytic Cr(VI) reduction and antibacterial activity. J Hazard Mater 2023; 447:130849. [PMID: 36701978 DOI: 10.1016/j.jhazmat.2023.130849] [Citation(s) in RCA: 24] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Revised: 12/28/2022] [Accepted: 01/20/2023] [Indexed: 06/17/2023]
Abstract
Z-scheme mechanism was a promising approach to considerably enhance photocatalytic activity. In this work, the PDINH/NH2-UiO-66(Zr) (PNU) heterojunctions were made using a facile ball-milling method. As expect, the optimum PNU-1 composite acted as highly active photocatalyst with 97% Cr(VI) to be reduced within 60 min of LED light illumination. Moreover, the antibacterial rate almost reached 100% for E. coli and S. aureus in 4 h, which was more conspicuous than the others. The wider light absorption range, promoted charge separation because of Z-scheme mechanism and efficient generation of reactive 1O2, •O2-, and •OH contributed greatly to the enhanced photocatalytic activity. Meanwhile, the superior stability and repeatability of the composites were also demonstrated by five cyclic experiments and related physicochemical characterizations. Therefore, this work provides a novel insight for designing high-efficiency Z-scheme heterostructures between MOFs and organic PDINH for wastewater remediation.
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Affiliation(s)
- Shuzhen Zheng
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310018, China
| | - Hao Du
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310018, China
| | - Lingxuan Yang
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310018, China
| | - Meng Tan
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310018, China
| | - Ningyi Li
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310018, China
| | - Yangjie Fu
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310018, China
| | - Derek Hao
- Centre for Technology in Water and Wastewater (CTWW), School of Civil and Environmental Engineering, University of Technology Sydney (UTS), Sydney, NSW 2007, Australia
| | - Qi Wang
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310018, China; Instrumental Analysis Center of Zhejiang Gongshang University, Hangzhou 310018, China.
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Chen Y, Li R, Yang L, Wang R, Li Z, Li T, Liu M, Ramakrishna S, Long Y. Synergistic Effects of Magnetic Z-Scheme g-C 3N 4/CoFe 2O 4 Nanofibres with Controllable Morphology on Photocatalytic Activity. Nanomaterials (Basel) 2023; 13:1142. [PMID: 37049235 PMCID: PMC10096916 DOI: 10.3390/nano13071142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/03/2023] [Revised: 03/15/2023] [Accepted: 03/15/2023] [Indexed: 06/19/2023]
Abstract
The rational design of interfacial contacts plays a decisive role in improving interfacial carrier transfer and separation in heterojunction photocatalysts. In Z-scheme photocatalysts, the recombination of photogenerated electron-hole pairs is prevented so that the redox capacity is maintained. Here, one-dimensional graphitic carbon nitride (g-C3N4)/CoFe2O4 fibres were synthesised as a new type of magnetic Z-scheme visible-light photocatalyst. Compared with pure g-C3N4 and CoFe2O4, the prepared composite photocatalysts showed considerably improved performance for the photooxidative degradation of tetracycline and methylene blue. In particular, the photodegradation efficiency of the g-C3N4/CoFe2O4 fibres for methylene blue was approximately two and seven times those of g-C3N4 and CoFe2O4, respectively. The formation mechanism of the Z-scheme heterojunctions in the g-C3N4/CoFe2O4 fibres was investigated using photocurrent spectroscopy and electrochemical impedance spectroscopy. We proposed that one of the reasons for the improved photodegradation performance is that the charge transport path in one-dimensional materials enables efficient photoelectron and hole transfer. Furthermore, the internal electric field of the prepared Z-scheme photocatalyst enhanced visible-light absorption, which provided a barrier for photoelectron-hole pair recombination.
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Affiliation(s)
- Yelin Chen
- Collaborative Innovation Center for Nanomaterials & Devices, College of Physics, Qingdao University, Qingdao 266071, China
| | - Ru Li
- Instrumental Analysis Center of Qingdao University, Qingdao 266071, China
| | - Lei Yang
- Research Center for Intelligent & Wearable Technology, College of Textiles & Clothing, Qingdao University, Qingdao 266071, China
| | - Rongxu Wang
- Collaborative Innovation Center for Nanomaterials & Devices, College of Physics, Qingdao University, Qingdao 266071, China
| | - Zhi Li
- Collaborative Innovation Center for Nanomaterials & Devices, College of Physics, Qingdao University, Qingdao 266071, China
| | - Tong Li
- Collaborative Innovation Center for Nanomaterials & Devices, College of Physics, Qingdao University, Qingdao 266071, China
| | - Meijie Liu
- Collaborative Innovation Center for Nanomaterials & Devices, College of Physics, Qingdao University, Qingdao 266071, China
| | - Seeram Ramakrishna
- Center for Nanofibers & Nanotechnology, Faculty of Engineering, National University of Singapore, Singapore 119077, Singapore
| | - Yunze Long
- Collaborative Innovation Center for Nanomaterials & Devices, College of Physics, Qingdao University, Qingdao 266071, China
- State Key Laboratory of Bio-Fibers & Eco-Textiles, Qingdao University, Qingdao 266071, China
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Sun S, Peng B, Song Y, Wang R, Song H, Lin W. Engineering Z-Scheme FeOOH/PCN with Fast Photoelectron Transfer and Surface Redox Kinetics for Efficient Solar-Driven CO 2 Reduction. ACS Appl Mater Interfaces 2023; 15:12957-12966. [PMID: 36876632 DOI: 10.1021/acsami.2c19906] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Solar-driven conversion of carbon dioxide (CO2) without sacrificial agents offers an attractive alternative in sustainable energy research; nevertheless, it is often retarded by the sluggish water oxidation kinetics and severe charge recombination. To this end, a Z-scheme iron oxyhydroxide/polymeric carbon nitride (FeOOH/PCN) heterojunction, as identified by quasi in situ X-ray photoelectron spectroscopy, is constructed. In this heterostructure, the two-dimensional FeOOH nanorod provides rich coordinatively unsaturated sites and highly oxidative photoinduced holes to boost the sluggish water decomposition kinetics. Meanwhile, PCN acts as a robust agent for CO2 reduction. Consequently, FeOOH/PCN achieves efficient CO2 photoreduction with a superior selectivity of CH4 (>85%), together with an apparent quantum efficiency of 2.4% at 420 nm that outperforms most two-step photosystems to date. This work offers an innovative strategy for the construction of photocatalytic systems toward solar fuel production.
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Affiliation(s)
- Shangcong Sun
- SINOPEC Research Institute of Petroleum Processing, Beijing 100083, China
| | - Bo Peng
- SINOPEC Research Institute of Petroleum Processing, Beijing 100083, China
| | - Ye Song
- SINOPEC Research Institute of Petroleum Processing, Beijing 100083, China
| | - Ruoyu Wang
- SINOPEC Research Institute of Petroleum Processing, Beijing 100083, China
| | - Haitao Song
- SINOPEC Research Institute of Petroleum Processing, Beijing 100083, China
| | - Wei Lin
- SINOPEC Research Institute of Petroleum Processing, Beijing 100083, China
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Yu X, Xu J, Wang J, Qiu J, An X, Wang Z, Lv G, Liao L, Ye J. Mimicking Photosynthesis: A Natural Z-Scheme Photocatalyst Constructed from Red Mud Bauxite Waste for Overall Water Splitting. Angew Chem Int Ed Engl 2023; 62:e202302050. [PMID: 36914574 DOI: 10.1002/anie.202302050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Revised: 03/07/2023] [Accepted: 03/13/2023] [Indexed: 03/16/2023]
Abstract
All-solid-state Z-Scheme photocatalysts have attracted significant attention due to their great potential for solar fuel production. However, delicately coupling two individual semiconductors with a charge shuttle by a material strategy remains a challenge. Herein, we demonstrate a new protocol of natural Z-Scheme heterostructures by strategically engineering the component and interfacial structure of red mud bauxite waste. Advanced characterizations elucidated that the hydrogen-induced formation of metallic Fe enabled the effective Z-Scheme electron transfer from Fe2O3 to TiO2, leading to the significantly boosted spatial separation of photo-generated carriers for overall water splitting. To the best of our knowledge, it is the first Z-Scheme heterojunction based on natural minerals for solar fuel production. Thus our work provides a new avenue toward the utilization of natural minerals for advanced catalysis applications.
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Affiliation(s)
- Xuelian Yu
- China University of Geosciences Beijing, School of Materials Science and Technology, 100081, CHINA
| | - Jian Xu
- China University of Geosciences Beijing, School of Materials Science and Technology, CHINA
| | - Jiangpeng Wang
- China University of Geosciences Beijing, School of Materials Science and Technology, CHINA
| | - Jinyu Qiu
- China University of Geosciences Beijing, School of Materials Science and Technology, CHINA
| | - Xiaoqiang An
- Tsinghua University, School of Environment, CHINA
| | - Zhuan Wang
- Chinese Academy of Sciences Institute of Physics, Laboratory of Soft Matter Physics, CHINA
| | - Guocheng Lv
- China University of Geosciences Beijing, School of Materials Science and Technology, CHINA
| | - Libing Liao
- China University of Geosciences Beijing, School of Materials Science and Technology, CHINA
| | - Jinhua Ye
- National Institute for Materials Science, International Center for Materials Nanoarchitectonics, Namiki 1-1, 305-0044, Tsukuba, JAPAN
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Cavdar O, Baluk M, Malankowska A, Żak A, Lisowski W, Klimczuk T, Zaleska-Medynska A. Photocatalytic hydrogen evolution from glycerol-water mixture under visible light over zinc indium sulfide (ZnIn(2)S(4)) nanosheets grown on bismuth oxychloride (BiOCl) microplates. J Colloid Interface Sci 2023; 640:578-87. [PMID: 36878075 DOI: 10.1016/j.jcis.2023.02.129] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Revised: 01/26/2023] [Accepted: 02/25/2023] [Indexed: 03/06/2023]
Abstract
ZnIn2S4 (ZIS) is one of the widely studied photocatalyst for photocatalytic hydrogen evolution applications due to its prominent visible light response and strong reduction ability. However, its photocatalytic glycerol reforming performance for hydrogen evolution has never been reported. Herein, the visible light driven BiOCl@ZnIn2S4 (BiOCl@ZIS) composite was synthesized by growth of ZIS nanosheets on a template-like hydrothermally pre-prepared wide-band-gap BiOCl microplates using simple oil-bath method to be used for the first time for photocatalytic glycerol reforming for photocatalytic hydrogen evolution (PHE) under visible light irradiation (λ > 420 nm). The optimum amount of BiOCl microplates in the composite was found 4 wt% (4% BiOCl@ZIS) in the presence of in-situ 1 wt% Pt deposition. Then, the in-situ Pt photodeposition optimization studies over 4% BiOCl@ZIS composite showed the highest PHE rate of 674 μmol g-1h-1 with the ultra-low platinum amount (0.0625 wt%). The possible mechanisms behind this improvement can be ascribed to the formation of Bi2S3 low-band-gap semiconductor during BiOCl@ZIS composite synthesis resulting in Z-scheme charge transfer mechanism between ZIS and Bi2S3 upon visible light irradiation. This work expresses not only the photocatalytic glycerol reforming over ZIS photocatalyst but also a solid proof of the contribution of wide-band-gap BiOCl photocatalysts to enhancement of ZIS PHE performance under visible light.
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Sasikala P, Bavani T, Selvaraj M, Preeyanghaa M, Neppolian B, Murugesan S, Madhavan J. A Z-scheme BiYO 3/g-C 3N 4 heterojunction photocatalyst for the degradation of organic pollutants under visible light irradiation. Environ Sci Pollut Res Int 2023; 30:41095-41106. [PMID: 36630043 DOI: 10.1007/s11356-022-25027-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Accepted: 12/23/2022] [Indexed: 06/17/2023]
Abstract
Photocatalysis is one of the fascinating fields for the wastewater treatment. In this regard, the present study deals with an effective visible light active BiYO3/g-C3N4 heterojunction nanocomposite photocatalyst with various ratios of BiYO3 and g-C3N4 (1:3, 1:1 and 3:1), synthesised by a wet chemical approach. The as-synthesised nanocomposite photocatalysts were investigated via different physicochemical approaches like Fourier transform infrared (FT-IR), X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), transmission electrons microscopy (TEM), UV-vis diffuse reflectance spectroscopy (DRS), photoluminescence (PL) and photoelectrochemical studies to characterise the crystal structure, morphology, optical absorption characteristics and photoelectrochemical properties. The photocatalytic degradation ability of the prepared photocatalytic samples was also analysed through the degradation of RhB in the presence of visible light irradiation. Of all the synthesised photocatalysts, the optimised CB-1 composite showed a significant photocatalytic efficiency (88.7%), with excellent stability and recyclability after three cycles. O2•- and •OH radicals were found to act a major role in the RhB degradation using optimised CB-1 composite, and it possessed ~ 1 times greater photocurrent intensity than the pristine g-C3N4 and BiYO3. In the present work, a direct Z-scheme heterojunction BiYO3/g-C3N4 with a considerably improved photocatalytic performance is reported.
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Affiliation(s)
- Parthasarathy Sasikala
- Solar Energy Lab, Department of Chemistry, Thiruvalluvar University, Vellore, 632 115, India
| | - Thirugnanam Bavani
- Solar Energy Lab, Department of Chemistry, Thiruvalluvar University, Vellore, 632 115, India
| | - Manickam Selvaraj
- Department of Chemistry, Faculty of Science, King Khalid University, Abha, 61413, Saudi Arabia
| | - Mani Preeyanghaa
- Department of Physics and Nanotechnology, SRM Institute of Science and Technology, Kattankulathur, 603 203, Chennai, India
| | - Bernaurdshaw Neppolian
- Department of Chemistry, SRM Institute of Science and Technology, Kattankulathur, 603 203, Chennai, India
| | | | - Jagannathan Madhavan
- Solar Energy Lab, Department of Chemistry, Thiruvalluvar University, Vellore, 632 115, India.
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Zhang K, Zhang K, Ma Y, Wang H, Shao J, Li M, Shao G, Fan B, Lu H, Xu H, Zhang R, Shi H. Construction of Z-Scheme TiO 2/Au/BDD Electrodes for an Enhanced Electrocatalytic Performance. Materials (Basel) 2023; 16:868. [PMID: 36676605 PMCID: PMC9862263 DOI: 10.3390/ma16020868] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 12/31/2022] [Accepted: 01/10/2023] [Indexed: 06/17/2023]
Abstract
TiO2/Au/BDD composites with a Z-scheme structure was prepared by orderly depositing gold (Au) and titanium dioxide (TiO2) on the surface of a boron-doped diamond (BDD) film using sputtering and electrophoretic deposition methods. It was found that the introduction of Au between TiO2 and the BDD, not only could reduce their contact resistance, to increase the carrier transport efficiency, but also could improve the surface Hall mobility of the BDD electrode. Meanwhile, the designed Z-scheme structure provided a fast channel for the electrons and holes combination, to promote the effective separation of the electrons and holes produced in TiO2 and the BDD under photoirradiation. The electrochemical characterization elucidated that these modifications of the structure obviously enhanced the electrocatalytic performance of the electrode, which was further verified by the simulated wastewater degradation experiments with reactive brilliant red X-3B. In addition, it was also found that the photoirradiation effectively enhanced the pollution degradation efficiency of the modified electrode, especially for the TiO2/Au/BDD-30 electrode.
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Affiliation(s)
- Kai Zhang
- School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, China
- Zhongyuan Critical Metals Laboratory, Zhengzhou 450001, China
| | - Kehao Zhang
- School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, China
| | - Yuxiang Ma
- School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, China
| | - Hailong Wang
- School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, China
- Zhongyuan Critical Metals Laboratory, Zhengzhou 450001, China
| | - Junyong Shao
- State Key Laboratory of Superabrasives, Zhengzhou Research Institute for Abrasives & Grinding Co., Ltd., Zhengzhou 450001, China
| | - Mingliang Li
- School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, China
- Zhongyuan Critical Metals Laboratory, Zhengzhou 450001, China
| | - Gang Shao
- School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, China
| | - Bingbing Fan
- School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, China
| | - Hongxia Lu
- School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, China
| | - Hongliang Xu
- School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, China
| | - Rui Zhang
- School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, China
- School of Material Science and Engineering, Luoyang Institute of Science and Technology, Luoyang 471023, China
| | - Huanhuan Shi
- School of Ecology and Environment, Zhengzhou University, Zhengzhou 450001, China
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Bavani T, Madhavan J, Preeyanghaa M, Neppolian B, Murugesan S. Construction of direct Z-scheme g-C 3N 4/BiYWO 6 heterojunction photocatalyst with enhanced visible light activity towards the degradation of methylene blue. Environ Sci Pollut Res Int 2023; 30:10179-10190. [PMID: 36071357 DOI: 10.1007/s11356-022-22756-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2022] [Accepted: 08/23/2022] [Indexed: 06/15/2023]
Abstract
Construction of the Z-scheme heterojunction photocatalyst achieved highly improved photocatalytic ability by its high redox ability of the photoinduced e--h+ pairs. In the study, Z-scheme g-C3N4/BiYWO6 heterojunction photocatalyst is prepared by the single-step hydrothermal method. Further, its photocatalytic ability was assessed by degrading methylene blue under visible light exposure. Particularly, the optimized 30 wt% of g-C3N4 in the g-C3N4/BiYWO6 composite exposes almost complete degradation after 90 min, that is ~ 3.0 times greater than the bare BiYWO6 and g-C3N4 with the rate constant value 0.032 min-1. Experimentally, the radical trapping studies indicate O2·- and ·OH radicals are playing a vital role in the photocatalytic degradation process. Also, the Z-scheme g-C3N4/BiYWO6 heterojunction photocatalyst exhibits excellent photoelectrochemical property and it is stable after 5 cycles, which indicates its good reusability nature. These enhancements are due to the newly formed heterostructure that facilitates the migration and separation efficiency of the photoproduced e--h+ pairs. Hence, the synthesized Z-scheme g-C3N4/BiYWO6 heterostructure could be an excellent material for wastewater remediation works.
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Affiliation(s)
- Thirugnanam Bavani
- Solar Energy Lab, Department of Chemistry, Thiruvalluvar University, Vellore, 632115, India
| | - Jagannathan Madhavan
- Solar Energy Lab, Department of Chemistry, Thiruvalluvar University, Vellore, 632115, India.
| | - Mani Preeyanghaa
- Department of Physics and Nanotechnology, SRM Research Institute, SRM Institute of Science and Technology, Kattankulathur, Chennai, 603203, India
| | - Bernaurdshaw Neppolian
- Department of Physics and Nanotechnology, SRM Research Institute, SRM Institute of Science and Technology, Kattankulathur, Chennai, 603203, India
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Zhang B, Liu Y, Zhu H, Gu D, Zhou K, Hao J. Enhanced visible light photocatalytic performance of a novel FeIn 2S 4 microsphere/BiOBr nanoplate heterojunction with a Z-scheme configuration. Environ Sci Pollut Res Int 2023; 30:13438-13448. [PMID: 36129652 DOI: 10.1007/s11356-022-22929-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/22/2022] [Accepted: 09/04/2022] [Indexed: 06/15/2023]
Abstract
The rational design of heterojunction photocatalysts is an effective way to improve semiconductor photocatalytic activity. The simple solvothermal method was used to successfully prepare visible light-driven FeIn2S4 microsphere/BiOBr nanoplate binary heterojunction photocatalysts with varying FeIn2S4 contents. The crystal structure, morphology, surface composition, specific surface area, charge separation, and optical properties of the as-prepared photocatalysts were investigated using a variety of analytical methods. In the photocatalytic degradation of rhodamine B, the FeIn2S4/BiOBr photocatalysts obtained a degradation efficiency of 96% within 60 min, which was approximately 5.33 and 2.59 times higher than pure FeIn2S4 and BiOBr, respectively. Radical trapping experiments and ESR measurements revealed the main active species (·OH, ·O2-, and h+) produced during photocatalytic degradation. The increased photocatalytic activity was due to the formation of Z-scheme heterojunctions between FeIn2S4 and BiOBr, which contributed to the improved effective charge separation of photogenerated charge carriers, augmented specific surface area, and enhanced redox capacity. It is expected that our current study will provide a hopeful way for future environmental remediation research.
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Affiliation(s)
- Biao Zhang
- School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu, 610054, China
| | - Yu Liu
- School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu, 610054, China.
| | - Hongyu Zhu
- School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu, 610054, China
| | - Dongxu Gu
- School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu, 610054, China
| | - Kanghong Zhou
- School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu, 610054, China
| | - Jianyuan Hao
- School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu, 610054, China
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Wang Z, Li W, Wang J, Li Y, Zhang G. Novel Z-scheme AgI/Sb 2WO 6 heterostructure for efficient photocatalytic degradation of organic pollutants under visible light: Interfacial electron transfer pathway, DFT calculation and mechanism unveiling. Chemosphere 2023; 311:137000. [PMID: 36309057 DOI: 10.1016/j.chemosphere.2022.137000] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2022] [Revised: 10/21/2022] [Accepted: 10/22/2022] [Indexed: 06/16/2023]
Abstract
Developing highly efficient heterostructured photocatalysts with robust redox ability is of great significance to wastewater purification. Herein, a novel Z-scheme AgI/Sb2WO6 heterojunction was successfully constructed via a chemical-precipitation method. The Z-scheme system can serve as a highly efficient photocatalyst for degradation of organic pollutants in water. Under visible light illumination, the degradation efficiency of rhodamine B and tetracycline over the optimal Z-scheme heterojunction can achieve 95% in 12 min and 80% in 8 min, which is 10.8 and 11.4 times higher than that over single Sb2WO6, respectively. Interestingly, low amounts of Ag0 can be generated and attached on the surface of Sb2WO6 during the photocatalytic process, further enhancing the photocatalytic activity of the Z-scheme heterojunction. Based on theoretical calculations, the interfacial internal electric field (IEF) can facilitate the photoexcited electrons at the conduction band (CB) of AgI to consume the photoexcited holes at the valence band (VB) of Sb2WO6, which greatly promotes the Z-scheme charge transfer path. Quenching experiments and electron spin resonance analyses demonstrate superoxide radicals play a major role in the photocatalytic reactions. The concept of constructing a Z-scheme heterojunction photocatalyst with efficient interfacial charge transfer shall provide a design guide for wastewater purification.
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Affiliation(s)
- Zhuangzhuang Wang
- Hubei Key Laboratory of Mineral Resources Processing and Environment, State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, 122 Luoshi Road, Wuhan, 430070, People's Republic of China
| | - Wenxuan Li
- Hubei Key Laboratory of Mineral Resources Processing and Environment, State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, 122 Luoshi Road, Wuhan, 430070, People's Republic of China
| | - Junting Wang
- Hubei Key Laboratory of Mineral Resources Processing and Environment, State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, 122 Luoshi Road, Wuhan, 430070, People's Republic of China.
| | - Yuan Li
- Hubei Key Laboratory of Mineral Resources Processing and Environment, State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, 122 Luoshi Road, Wuhan, 430070, People's Republic of China
| | - Gaoke Zhang
- Hubei Key Laboratory of Mineral Resources Processing and Environment, State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, 122 Luoshi Road, Wuhan, 430070, People's Republic of China; Henan Institute of Advanced Technology, Zhengzhou University, Zhengzhou, 450052, China.
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Balakrishnan A, Gaware GJ, Chinthala M. Heterojunction photocatalysts for the removal of nitrophenol: A systematic review. Chemosphere 2023; 310:136853. [PMID: 36243095 DOI: 10.1016/j.chemosphere.2022.136853] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Revised: 09/24/2022] [Accepted: 10/09/2022] [Indexed: 06/16/2023]
Abstract
Nitrophenols are the most widely used raw materials in the chemical, pesticide, and pharmaceutical industries. Due to improper waste management and excessive usage, nitrophenol is listed as a priority pollutant and garnered global research attention. This review highlights the recent progress on heterojunction photocatalysts toward eliminating nitrophenols. The detailed mechanisms of the electron-hole pair separation using different heterojunctions such as traditional, p-n, Z-scheme, S-scheme, and Schottky heterojunctions are elaborated. The performance of the photocatalysts is evaluated using quantum efficiency. Among the heterojunctions, Z-scheme exhibited maximum removal efficiency of 100% and found superior over other heterojunctions. Even though heterojunctions exhibit good efficiency, the reusability of the heterojunction photocatalyst is not reported beyond 5 cycles. Further research is indeed to develop a highly reusable photocatalyst for environmental remediation.
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Affiliation(s)
- Akash Balakrishnan
- Process Intensification Laboratory, Department of Chemical Engineering, National Institute of Technology, Rourkela, Odisha, 769008, India
| | - Ghanghor Jayant Gaware
- Process Intensification Laboratory, Department of Chemical Engineering, National Institute of Technology, Rourkela, Odisha, 769008, India
| | - Mahendra Chinthala
- Process Intensification Laboratory, Department of Chemical Engineering, National Institute of Technology, Rourkela, Odisha, 769008, India.
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Mishra NS, Saravanan P. Z-scheme promoted heterojunction photocatalyst (Ag@AgVO 3 /rGO/CeVO 4) with improved interfacial charge transfer for efficient removal of aqueous organics irradiated under LED light. Chemosphere 2023; 310:136896. [PMID: 36257388 DOI: 10.1016/j.chemosphere.2022.136896] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Revised: 09/28/2022] [Accepted: 10/11/2022] [Indexed: 06/16/2023]
Abstract
A facile hydrothermal route was followed to obtain a ternary composite Ag@AgVO3/rGO/CeVO4 with in-situ deposition of Ag nanoparticles over the AgVO3 nano-belts. The in-situ deposition was promoted and enhanced with the introduction of GO. The as-synthesized composite demonstrated remarkable visible light harvesting efficiency greater than 75% in the visible region. The charge separation and light harvesting properties were achieved through the Z-scheme mechanism mediated through rGO and the electron trapping/Schottky barrier effect from Ag nanoparticles. The reduction in the width of space charge region (∼2.5 times) and simultaneous increase in the density of charge carriers (2.3∗1018) promoted the LED irradiated photocatalytic performance. The decay time of the charge carriers were prolonged in the order of 4.46 s implying the enhancement in the charge separation. The studies were extended to charge trapping and the band structure modelling. The later emphasized on the prominence of Z-scheme mechanism with hole mediated degradation pathway. The LED photocatalysis demonstrated a removal efficiency of 87.20% for MB and 55.51% for phenol with a average AQE of 29.28% (MB) and 13.90% (phenol) for the ternary. The mineralization efficiency determined through TOC analysis was found to be 71.72%, and 66.43% for MB and phenol system respectively.
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Affiliation(s)
- Nirmalendu S Mishra
- Environmental Nanotechnology Laboratory, Department of Environmental Science and Engineering, Indian Institute of Technology (ISM), Dhanbad, 826004, Jharkhand, India
| | - Pichiah Saravanan
- Environmental Nanotechnology Laboratory, Department of Environmental Science and Engineering, Indian Institute of Technology (ISM), Dhanbad, 826004, Jharkhand, India.
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Vijayan M, Manikandan V, Rajkumar C, Hatamleh AA, Alnafisi BK, Easwaran G, Liu X, Sivakumar K, Kim H. Constructing Z-scheme g-C 3N 4/TiO 2 heterostructure for promoting degradation of the hazardous dye pollutants. Chemosphere 2023; 311:136928. [PMID: 36272623 DOI: 10.1016/j.chemosphere.2022.136928] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Revised: 10/11/2022] [Accepted: 10/16/2022] [Indexed: 06/16/2023]
Abstract
The use of dyes and segments has increased widely in recent years, but it poses a serious health risk to ecosystems. In this work, TiO2 and two-dimensional g-C3N4 nanosheets (g-CN) were fabricated through co-precipitation and thermal polymerization technique, respectively. The g-CN-TiO2 photocatalyst (1: 3, 2: 2, 3: 1) in various weight percentages was prepared using a simple impregnation process. The photocatalytic behaviour of the g-CN, TiO2 NPs, and different weight percentages of g-CN-TiO2 photocatalyst was evaluated against methylene blue (MB) dye under UV-visible light illumination. Compared to pristine and other weight percentages of the g-CN-TiO2 nanocomposite, the optimized g-CN-TiO2 nanocomposite (3:1) showed promoted performance against MB dye. The enriched catalytic efficiency can be accredited to the low amount of TiO2 nanoparticles deposited on gCN nanosheets, possibly due to the boosted transport properties of the electron-hole pairs. The enriched photocatalytic behaviour can be attributed to the development of the Z-scheme system between TiO2 and g-CN. The current study is an outstanding demonstration of the development of maximum catalytic efficiency for destroying hazardous chemical dyes.
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Affiliation(s)
- M Vijayan
- Department of Chemistry, Government Polytechnic College, Jolarpet, 635651, Tamilnadu, India
| | - Velu Manikandan
- School of Physics and Electronic Information, Yan'an University, Yan'an, 716000, China; Department of Food Science and Technology, Seoul Women's University, 621 Hwarangno, Nowon-gu, Seoul, South Korea; Department of Conservative Dentistry and Endodontics, Saveetha Dental College and Hospitals, Saveetha Institute of Medical and Technical Sciences (SIMATS), Chennai, Tamilnadu, 600 077, India
| | - Chellakannu Rajkumar
- School of Materials Science and Engineering, Yeungnam University, Gyeongsan, 38541, Republic of Korea
| | - Ashraf Atef Hatamleh
- Department of Botany and Microbiology, College of Science, King Saud University, P.O. Box 2455, Riyadh, 11451, Saudi Arabia
| | - Bassam Khalid Alnafisi
- Department of Botany and Microbiology, College of Science, King Saud University, P.O. Box 2455, Riyadh, 11451, Saudi Arabia
| | - G Easwaran
- Department of Chemistry, Government Polytechnic College, Dharmapuri, 635205, Tamilnadu, India
| | - Xinghui Liu
- School of Physics and Electronic Information, Yan'an University, Yan'an, 716000, China; Department of Materials Physics, Saveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences (SIMTS), Chennai, 602105, Tamilnadu, India.
| | - K Sivakumar
- Department of Chemistry, Adhiyamaan College of Engineering, Hosur, 635109, Tamilnadu, India.
| | - Haekyoung Kim
- School of Materials Science and Engineering, Yeungnam University, Gyeongsan, 38541, Republic of Korea.
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Zhu H, Zhen C, Chen X, Feng S, Li B, Du Y, Liu G, Cheng HM. Patterning alternate TiO(2) and Cu(2)O strips on a conductive substrate as film photocatalyst for Z-scheme photocatalytic water splitting. Sci Bull (Beijing) 2022; 67:2420-7. [PMID: 36566065 DOI: 10.1016/j.scib.2022.11.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2022] [Revised: 11/02/2022] [Accepted: 11/08/2022] [Indexed: 11/23/2022]
Abstract
Semiconductor heterostructures mediated by electrical conductors are very promising for Z-scheme photocatalytic water splitting. In contrast to conventional particulate heterostructures, alternate TiO2 and Cu2O film stripes patterned parallel on a fluorine-doped tin oxide (FTO) conductive substrate was fabricated as a model film photocatalyst to study the characteristics of the photogenerated charge transfer process. The Z-scheme transfer process with an effective transport distance of up to 5 μm occurs only in regions distant from the TiO2/Cu2O strip edges through the FTO substrate from the bottom. In contrast, the transfer of charge around their contact regions follows the conventional transfer process through the TiO2/Cu2O strip interface. These results indicate that the Z-scheme transfer process occurring in such a large region dominates the charge transfer processes in the TiO2/FTO/Cu2O pattern film heterostructure. Importantly, unlike the single component film, which is inactive for photocatalytic overall water splitting, the modified TiO2/Cu2O pattern film can induce photocatalytic overall water splitting at a stoichiometric H2/O2 ratio close to 2:1. These findings have significant implications in designing efficient heterostructures by employing a Z-scheme charge transfer process.
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Wei L, Chen Y, Yu X, Yan Y, Liu H, Cui X, Liu X, Yang X, Meng J, Yang S, Wang L, Yang X, Chen R, Cheng Y. Bismuth Tungstate-Silver Sulfide Z-Scheme Heterostructure Nanoglue Promotes Wound Healing through Wound Sealing and Bacterial Inactivation. ACS Appl Mater Interfaces 2022; 14:53491-53500. [PMID: 36416503 DOI: 10.1021/acsami.2c15299] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Rapid wound closure and bacterial inactivation are effective strategies to promote wound healing. Herein, a versatile nanoglue, bismuth tungstate (Bi2WO6)-silver sulfide (Ag2S) direct Z-scheme heterostructure nanoparticles (BWOA NPs), was designed to accelerate wound healing. BWOA NPs' hollow structure and rough surface could effectively close wound tissues acting as a barrier between external bacteria and the wound. More importantly, the unique Z-scheme heterostructure endows BWOA NPs with an effective electron and hole separating ability with potent redox potential, where electrons and holes could effectively react with water and oxygen to produce reactive oxygen species, leading to a higher antibacterial activity against both endogenous and external bacteria at the wound site. A series of in vitro and in vivo biological assessments demonstrated that BWOA NPs could rapidly close wounds and promote wound healing. With sunlight irradiation, the inhibiting rates of BWOA NPs against Escherichia coli and Staphylococcus aureus are 61.62 ± 2.85 and 73.40 ± 3.28%, respectively. Also, the wound healing rate in BWOA NP-treated mice is 25.90 ± 5.85% higher than PBS. This design provides a new effective strategy to promote bacterial inactivation and accelerate wound healing.
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Affiliation(s)
- Liqi Wei
- Engineering Research Center of Bioreactor and Pharmaceutical Development, Ministry of Education, College of Life Science, Jilin Agricultural University, Changchun 130118, P.R. China
| | - Yining Chen
- Engineering Research Center of Bioreactor and Pharmaceutical Development, Ministry of Education, College of Life Science, Jilin Agricultural University, Changchun 130118, P.R. China
| | - Xinru Yu
- Engineering Research Center of Bioreactor and Pharmaceutical Development, Ministry of Education, College of Life Science, Jilin Agricultural University, Changchun 130118, P.R. China
| | - Yan Yan
- College of Science, Jilin Provincial Key Laboratory of Human Health Status Identification and Function Enhancement, Changchun University, Changchun 130022, P.R. China
| | - Hongxiang Liu
- Engineering Research Center of Bioreactor and Pharmaceutical Development, Ministry of Education, College of Life Science, Jilin Agricultural University, Changchun 130118, P.R. China
| | - Xingyu Cui
- Engineering Research Center of Bioreactor and Pharmaceutical Development, Ministry of Education, College of Life Science, Jilin Agricultural University, Changchun 130118, P.R. China
| | - Xin Liu
- Engineering Research Center of Bioreactor and Pharmaceutical Development, Ministry of Education, College of Life Science, Jilin Agricultural University, Changchun 130118, P.R. China
| | - Xiaodong Yang
- College of Science, Jilin Provincial Key Laboratory of Human Health Status Identification and Function Enhancement, Changchun University, Changchun 130022, P.R. China
| | - Jiaqi Meng
- Engineering Research Center of Bioreactor and Pharmaceutical Development, Ministry of Education, College of Life Science, Jilin Agricultural University, Changchun 130118, P.R. China
| | - Shuo Yang
- College of Science, Jilin Provincial Key Laboratory of Human Health Status Identification and Function Enhancement, Changchun University, Changchun 130022, P.R. China
| | - Lili Wang
- College of Science, Jilin Provincial Key Laboratory of Human Health Status Identification and Function Enhancement, Changchun University, Changchun 130022, P.R. China
| | - Xizhen Yang
- College of Science, Jilin Provincial Key Laboratory of Human Health Status Identification and Function Enhancement, Changchun University, Changchun 130022, P.R. China
| | - Rui Chen
- College of Science, Jilin Provincial Key Laboratory of Human Health Status Identification and Function Enhancement, Changchun University, Changchun 130022, P.R. China
| | - Yan Cheng
- Engineering Research Center of Bioreactor and Pharmaceutical Development, Ministry of Education, College of Life Science, Jilin Agricultural University, Changchun 130118, P.R. China
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Mane P, Bae H, Burungale V, Lee SW, Misra M, Parbat H, Kadam AN, Ha JS. Interface-engineered Z-scheme of BiVO 4/g-C 3N 4 photoanode for boosted photoelectrochemical water splitting and organic contaminant elimination under solar light. Chemosphere 2022; 308:136166. [PMID: 36037961 DOI: 10.1016/j.chemosphere.2022.136166] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2022] [Revised: 07/25/2022] [Accepted: 08/19/2022] [Indexed: 06/15/2023]
Abstract
Although n-type bismuth vanadate (BiVO4) is regarded as an attractive solar-light-active photoanode, its short carrier-diffusion length, sluggish oxidation kinetics, low electronic conductivity, and high recombination rate are the major intrinsic shortcomings that limit its practical application. To this end, the rational design of a solar-light-active, metal-free BiVO4-based Z-scheme heterojunction photoanode is of great significance for achieving effective charge-separation features and maximum light utilization as well as boosting redox activity for efficient environmental treatment and photoelectrochemical water splitting. Herein, we propose a facile approach for the decoration of metal-free graphitic carbon nitride (g-C3N4) nanosheets on BiVO4 to form a Z-scheme BiVO4/g-C3N4 photoanode with boosted photoelectrochemical (PEC) water splitting and rapid photoelectrocatalytic degradation of methyl orange (MO) dye under simulated solar light. The successful preparation of the Z-scheme BiVO4/g-C3N4 photoanode was confirmed by comprehensive structural, morphological, and optical analyses. Compared with the moderate photocurrent density of bare BiVO4 (0.39 mA cm-2), the Z-scheme BiVO4/g-C3N4 photoanode yields a notable photocurrent density of 1.14 mA cm-2 at 1.23 V vs. RHE (≈3-fold higher) with the promising long-term stability of 5 h without any significant photo-corrosion. Moreover, the PEC dye-degradation studies revealed that the Z-scheme BiVO4/g-C3N4 photoanode successfully degraded MO (≈90%) in 75 min, signifying a 30% improvement over bare BiVO4. This research paves the way for rational interface engineering of solar-light-active BiVO4-based noble-metal-free Z-schemes for eco-friendly PEC water splitting and water remediation.
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Affiliation(s)
- Pratik Mane
- School of Chemical Engineering, Chonnam National University, Buk-gu, Gwangju, 61186, Republic of Korea
| | - Hyojung Bae
- School of Chemical Engineering, Chonnam National University, Buk-gu, Gwangju, 61186, Republic of Korea; Optoelectronics Convergence Research Center, Chonnam National University, Buk-gu, Gwangju, 61186, Republic of Korea
| | - Vishal Burungale
- School of Chemical Engineering, Chonnam National University, Buk-gu, Gwangju, 61186, Republic of Korea
| | - Sang-Wha Lee
- Department of Chemical and Biological Engineering, Gachon University, San 65, Bokjeong-Dong, Sujeong-Gu, Seongnam City, Gyeonggi-do, 461-701, South Korea
| | - Mrinmoy Misra
- Mechatronics Engineering Department, School of Automobile, Mechanical and Mechatronics, Manipal University Jaipur, India
| | - Harichandra Parbat
- Department of Chemistry, John Wilson Education Society's, Wilson College (Autonomous), Mumbai, Maharashtra, 400007, India
| | - Abhijit N Kadam
- Department of Chemical and Biological Engineering, Gachon University, San 65, Bokjeong-Dong, Sujeong-Gu, Seongnam City, Gyeonggi-do, 461-701, South Korea; Department of Chemistry, John Wilson Education Society's, Wilson College (Autonomous), Mumbai, Maharashtra, 400007, India.
| | - Jun-Seok Ha
- School of Chemical Engineering, Chonnam National University, Buk-gu, Gwangju, 61186, Republic of Korea; Optoelectronics Convergence Research Center, Chonnam National University, Buk-gu, Gwangju, 61186, Republic of Korea.
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Dhiman P, Sharma G, Alodhayb AN, Kumar A, Rana G, Sithole T, ALOthman ZA. Constructing a Visible-Active CoFe 2O 4@Bi 2O 3/NiO Nanoheterojunction as Magnetically Recoverable Photocatalyst with Boosted Ofloxacin Degradation Efficiency. Molecules 2022; 27:8234. [PMID: 36500330 PMCID: PMC9741353 DOI: 10.3390/molecules27238234] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2022] [Revised: 11/09/2022] [Accepted: 11/10/2022] [Indexed: 11/29/2022] Open
Abstract
Constructing visible-light-active Z-scheme heterojunctions has proven fruitful in enhancing the photocatalytic activity of photocatalysts for superior water clean-up. Herein, we report the fabrication of a CoFe2O4@Bi2O3/NiO (CBN) Z-scheme nanoheterojunction. The obtained CBN heterojunction was used for visible-light-assisted degradation of ofloxacin (OFL) in water. The OFL degradation efficiency achieved by the CBN heterojunction was 95.2% in 90 min with a rate constant of kapp = 0.03316 min-1, which was about eight times that of NiO and thirty times that of CoFe2O4. The photocatalytic activity of a Bi2O3/NiO Z-scheme heterojunction was greatly enhanced by the visible activity and redox mediator effect of the cobalt ferrite co-catalyst. Higher charge-carrier separation, more visible-light capture, and the Z-scheme mechanism in the Z-scheme system were the important reasons for the high performance of CBN. The scavenging experiments suggested ●O2- as an active species for superior OFL degradation. The possible OFL degradation pathway was predicted based on LC-MS findings of degradation intermediate products. The magnetic nature of the CBN helped in the recovery of the catalyst after reuse for six cycles. This work provides new insights into designing oxide-based heterojunctions with high visible-light activity, magnetic character, and high redox capabilities for potential practical applications in environmental treatment.
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Affiliation(s)
- Pooja Dhiman
- International Research Centre of Nanotechnology for Himalayan Sustainability (IRCNHS), Shoolini University, Solan 173229, India
| | - Gaurav Sharma
- International Research Centre of Nanotechnology for Himalayan Sustainability (IRCNHS), Shoolini University, Solan 173229, India
- Department of Chemistry, College of Science, King Saud University, Bldg. #5, Riyadh 11451, Saudi Arabia
- Department of Chemical Engineering, University of Johannesburg, P.O. Box 17011, Doornfontein 2088, South Africa
| | - Abdullah N. Alodhayb
- Department of Physics and Astronomy, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
| | - Amit Kumar
- International Research Centre of Nanotechnology for Himalayan Sustainability (IRCNHS), Shoolini University, Solan 173229, India
| | - Garima Rana
- International Research Centre of Nanotechnology for Himalayan Sustainability (IRCNHS), Shoolini University, Solan 173229, India
| | - Thandiwe Sithole
- Department of Chemical Engineering, University of Johannesburg, P.O. Box 17011, Doornfontein 2088, South Africa
| | - Zeid A. ALOthman
- Department of Chemistry, College of Science, King Saud University, Bldg. #5, Riyadh 11451, Saudi Arabia
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Feng J, Ran X, Wang L, Xiao B, Lei L, Zhu J, Liu Z, Xi X, Feng G, Dai Z, Li R. The Synergistic Effect of Adsorption-Photocatalysis for Removal of Organic Pollutants on Mesoporous Cu(2)V(2)O(7)/Cu(3)V(2)O(8)/g-C(3)N(4) Heterojunction. Int J Mol Sci 2022; 23. [PMID: 36430740 DOI: 10.3390/ijms232214264] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2022] [Revised: 11/13/2022] [Accepted: 11/14/2022] [Indexed: 11/19/2022] Open
Abstract
Cu2V2O7/Cu3V2O8/g-C3N4 heterojunctions (CVCs) were prepared successfully by the reheating synthesis method. The thermal etching process increased the specific surface area. The formation of heterojunctions enhanced the visible light absorption and improved the separation efficiency of photoinduced charge carriers. Therefore, CVCs exhibited superior adsorption capacity and photocatalytic performance in comparison with pristine g-C3N4 (CN). CVC-2 (containing 2 wt% of Cu2V2O7/Cu3V2O8) possessed the best synergistic removal efficiency for removal of dyes and antibiotics, in which 96.2% of methylene blue (MB), 97.3% of rhodamine B (RhB), 83.0% of ciprofloxacin (CIP), 86.0% of tetracycline (TC) and 80.5% of oxytetracycline (OTC) were eliminated by the adsorption and photocatalysis synergistic effect under visible light irradiation. The pseudo first order rate constants of MB and RhB photocatalytic degradation on CVC-2 were 3 times and 10 times that of pristine CN. For photocatalytic degradation of CIP, TC and OTC, it was 3.6, 1.8 and 6.1 times that of CN. DRS, XPS VB and ESR results suggested that CVCs had the characteristics of a Z-scheme photocatalytic system. This study provides a reliable reference for the treatment of real wastewater by the adsorption and photocatalysis synergistic process.
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Das K, Bariki R, Pradhan SK, Majhi D, Dash P, Mishra A, Dhiman R, Nayak B, Mishra BG. Boosting the photocatalytic performance of Bi 2Fe 4O 9 through formation of Z-scheme heterostructure with In 2S 3: Applications towards water decontamination. Chemosphere 2022; 306:135600. [PMID: 35809748 DOI: 10.1016/j.chemosphere.2022.135600] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2022] [Revised: 06/18/2022] [Accepted: 07/01/2022] [Indexed: 06/15/2023]
Abstract
Design of biocompatible nano-heterostructure photocatalyst with broad UV-visible spectrum response and strong redox ability is a promising approach with potential application in micropollutant degradation and pathogen deactivation from aqueous sources. Herein, we have reported the facile fabrication of In2S3/Bi2Fe4O9 (ISxBFO) binary heterostructure by hydrothermally depositing In2S3 nanoparticles (20-40 nm) over Bi2Fe4O9 nanocuboids/nanoplates prepared by combustion synthesis route. In depth characterization study revealed broad spectrum UV-Vis absorption, large interfacial contact, improved charge carrier separation and mobility and a longer excited state life time (4.7 ns) for the ISxBFO heterostructure materials. The integration of In2S3 with Bi2Fe4O9 strongly boosts the optoelectrical and photocatalytic property of pristine Bi2Fe4O9. The ISxBFO heterostructure material exhibited enhanced photocatalytic efficiency for aqueous phase degradation of sulfamethoxazole antibiotics (kapp = 0.06 min-1) and phenyl urea herbicides (kapp = 0.028 min-1) with reaction rates 3-8 times higher than the pure BFO component. The MTT assay experiments confirmed non-cytotoxic nature of treated sulfamethoxazole and diuron solutions. The composite materials also displayed convincing antibacterial behavior towards toxigenic Vibrio cholerae pathogen. Haemagglutination assay study revealed excellent biocompatibility of the binary composite up to 200 mg L-1. Radical trapping study suggested expeditious generation of •OH and •O2- radicals over the ISxBFO surface which is nearly 3.8 and 2.3 times higher than pure BFO and In2S3 respectively. The occurrence of a direct Z-scheme mechanism is inferred from radical trapping and XPS study which accounted for the improved photocatalytic activity and strong radical generation property of the ISxBFO heterostructure material.
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Affiliation(s)
- Krishnendu Das
- Department of Chemistry, National Institute of Technology, Rourkela, 769008, Odisha, India
| | - Ranjit Bariki
- Department of Chemistry, National Institute of Technology, Rourkela, 769008, Odisha, India
| | - Sibun Kumar Pradhan
- Department of Chemistry, National Institute of Technology, Rourkela, 769008, Odisha, India
| | - Dibyananda Majhi
- Department of Chemistry, National Institute of Technology, Rourkela, 769008, Odisha, India
| | - Priyanka Dash
- Department of Life Science, National Institute of Technology, Rourkela, 769008, Odisha, India
| | - Abtar Mishra
- Department of Life Science, National Institute of Technology, Rourkela, 769008, Odisha, India
| | - Rohan Dhiman
- Department of Life Science, National Institute of Technology, Rourkela, 769008, Odisha, India
| | - Bismita Nayak
- Department of Life Science, National Institute of Technology, Rourkela, 769008, Odisha, India
| | - B G Mishra
- Department of Chemistry, National Institute of Technology, Rourkela, 769008, Odisha, India.
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