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Li J, Tu P, Yang Q, Cui Y, Gao C, Zhou H, Lu J, Bian H. A novel type-II-II heterojunction for photocatalytic degradation of LEV based on the built-in electric field: carrier transfer mechanism and DFT calculation. Sci Rep 2024; 14:10643. [PMID: 38724634 PMCID: PMC11082242 DOI: 10.1038/s41598-024-60250-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2024] [Accepted: 04/20/2024] [Indexed: 05/12/2024] Open
Abstract
Heterojunctions play a crucial role in improving the absorption of visible light and performance of photocatalysts for organic contaminants degradation in water. In this work, a novel type-II-II Ag2CO3/Bi2WO6 (AB) heterojunction was synthesized by hydrothermal reaction and in situ-precipitation methods. The mechanisms of charge transfer and carrier separation at the interface of heterojunctions and the influence on the photocatalytic activity were investigated. The degradation of levofloxacin (LEV) under visible light irradiation was employed to evaluate the photocatalytic performance of AB. The results showed that 85.4% LEV was degraded by AB, which was 1.38 and 1.39 times higher than that of Bi2WO6 and Ag2CO3, respectively. The work functions of the different crystal planes in the AB heterojunction, which was calculated by density functional theory, are a significant difference. The Fermi energy (Ef) of Ag2CO3 (- 6.005 eV) is lower than Bi2WO6 (- 3.659 eV), but the conduction band (CB) is higher. Therefore, using AB heterojunctions as an example, the research explored the mechanism of type-II-II which CB and Ef of one semiconductor cannot simultaneously surpass those of another material, based on the built-in electric field theory. Through this analysis, a deeper understanding of type-II heterojunctions was achieved, and providing valuable insights into the behavior of this specific heterojunction system.
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Affiliation(s)
- Jiaquan Li
- College of Science, Gansu Agricultural University, Lanzhou, 730070, People's Republic of China
| | - Peng Tu
- College of Science, Gansu Agricultural University, Lanzhou, 730070, People's Republic of China
| | - Qian Yang
- College of Science, Gansu Agricultural University, Lanzhou, 730070, People's Republic of China
| | - Yanjun Cui
- College of Science, Gansu Agricultural University, Lanzhou, 730070, People's Republic of China
| | - Chenyang Gao
- College of Science, Gansu Agricultural University, Lanzhou, 730070, People's Republic of China
| | - Hui Zhou
- School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou, 730050, People's Republic of China
| | - Jun Lu
- College of Science, Gansu Agricultural University, Lanzhou, 730070, People's Republic of China
| | - Hongxia Bian
- College of Science, Gansu Agricultural University, Lanzhou, 730070, People's Republic of China.
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2
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Liao G, Qing X, Lai X, Liang Z, Jiang S, Xie Z, Fang J, Lan B, Chen W, Wang J, Li L. Efficient treatment of surfactant containing wastewater by photocatalytic ozonation with BiPO 4 nanorods. CHEMOSPHERE 2024; 346:140594. [PMID: 37914050 DOI: 10.1016/j.chemosphere.2023.140594] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Revised: 09/09/2023] [Accepted: 10/29/2023] [Indexed: 11/03/2023]
Abstract
In this study, monoclinic BiPO4 nanorods were fabricated by one-pot solvothermal method. Its catalytic capability in photocatalytic ozonation process was tested by degradation and mineralization of sodium dodecyl benzene sulfonate (SDBS) solution. The results demonstrated that the TOC removal rate was dramatically improved to 90.0% at 75 min for UV/O3/BiPO4 process, which was 4.9 and 3.8 times more than that of UV/BiPO4 and O3. Moreover, the pseudo-first-order kinetic constant (0.337 min-1) and mineralization rate (90.0%) for SDBS degradation using BiPO4 in UV/O3 process were 1.6 and 1.3 times as great as that of conventional TiO2 photocatalyst (0.206 min-1, 67.3%). The influence of BiPO4 dosage, O3 concentration initial pH and coexisted ions on SDBS degradation in UV/O3/BiPO4 process were also investigated. The outcome of quenching studies illustrated both ·OH and h+ contributed prominently to SDBS degradation in UV/O3/BiPO4 process, implying that high valence band position of BiPO4 could promote the synergism between photocatalysis and ozonation. The degradation pathway of SBDS was proposed by combination of intermediates analysis and DFT calculation. Real carwash wastewater was chosen as typical surfactant containing wastewater to explore the practical application of UV/O3/BiPO4 technology. During 30 min, COD and LAS removal efficiency reached 59.7% and 70.6%, respectively. The quality indices of effluent could meet the requirements for reuse of carwash water in Water Quality Standard for Urban Miscellaneous Use in China. Energy consumption in the process was calculated as 13.9 kW h m-3, which was about 3.6 and 2.2 times less than that of UV/BiPO4 and O3 process, respectively. The results suggest that UV/O3/BiPO4 system has an application potential for surfactant containing wastewater treatment or recycle.
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Affiliation(s)
- Gaozu Liao
- School of Environment, South China Normal University, Guangdong Provincial Engineering Technology Research Center for Drinking Water Safety, Guangdong Provincial Key Lab of Functional Materials for Environmental Protection, Guangzhou, 510006, China.
| | - Xiaojiao Qing
- School of Environment, South China Normal University, Guangdong Provincial Engineering Technology Research Center for Drinking Water Safety, Guangdong Provincial Key Lab of Functional Materials for Environmental Protection, Guangzhou, 510006, China
| | - Xin Lai
- School of Environment, South China Normal University, Guangdong Provincial Engineering Technology Research Center for Drinking Water Safety, Guangdong Provincial Key Lab of Functional Materials for Environmental Protection, Guangzhou, 510006, China
| | - Ziyi Liang
- School of Environment, South China Normal University, Guangdong Provincial Engineering Technology Research Center for Drinking Water Safety, Guangdong Provincial Key Lab of Functional Materials for Environmental Protection, Guangzhou, 510006, China
| | - Shiqi Jiang
- School of Environment, South China Normal University, Guangdong Provincial Engineering Technology Research Center for Drinking Water Safety, Guangdong Provincial Key Lab of Functional Materials for Environmental Protection, Guangzhou, 510006, China
| | - Zhuomin Xie
- School of Environment, South China Normal University, Guangdong Provincial Engineering Technology Research Center for Drinking Water Safety, Guangdong Provincial Key Lab of Functional Materials for Environmental Protection, Guangzhou, 510006, China
| | - Jinhai Fang
- School of Environment, South China Normal University, Guangdong Provincial Engineering Technology Research Center for Drinking Water Safety, Guangdong Provincial Key Lab of Functional Materials for Environmental Protection, Guangzhou, 510006, China
| | - Bingyan Lan
- School of Environment, South China Normal University, Guangdong Provincial Engineering Technology Research Center for Drinking Water Safety, Guangdong Provincial Key Lab of Functional Materials for Environmental Protection, Guangzhou, 510006, China
| | - Weirui Chen
- School of Environment, South China Normal University, Guangdong Provincial Engineering Technology Research Center for Drinking Water Safety, Guangdong Provincial Key Lab of Functional Materials for Environmental Protection, Guangzhou, 510006, China
| | - Jing Wang
- School of Environment, South China Normal University, Guangdong Provincial Engineering Technology Research Center for Drinking Water Safety, Guangdong Provincial Key Lab of Functional Materials for Environmental Protection, Guangzhou, 510006, China
| | - Laisheng Li
- School of Environment, South China Normal University, Guangdong Provincial Engineering Technology Research Center for Drinking Water Safety, Guangdong Provincial Key Lab of Functional Materials for Environmental Protection, Guangzhou, 510006, China
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3
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Dhawle R, Giannakopoulos S, Frontistis Z, Mantzavinos D. Peroxymonosulfate Enhanced Photoelectrocatalytic Degradation Of 17α-Ethinyl Estradiol. Catal Today 2023. [DOI: 10.1016/j.cattod.2023.02.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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4
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Delarmelina M, Dlamini MW, Pattisson S, Davies PR, Hutchings GJ, Catlow CRA. The effect of dissolved chlorides on the photocatalytic degradation properties of titania in wastewater treatment. Phys Chem Chem Phys 2023; 25:4161-4176. [PMID: 36655703 DOI: 10.1039/d2cp03140j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
We investigate the effect of chlorides on the photocatalytic degradation of phenol by titania polymorphs (anatase and rutile). We demonstrate how solubilised chlorides can affect the hydroxyl radical formation on both polymorphs with an overall effect on their photodegradative activity. Initially, the photocatalytic activity of anatase and rutile for phenol degradation is investigated in both standard water and brines. With anatase, a significant reduction of the phenol conversion rate is observed (from a pseudo-first-order rate constant k = 5.3 × 10-3 min-1 to k = 3.5 × 10-3 min-1). In contrast, the presence of solubilised chlorides results in enhancement of rutile activity under the same reaction conditions (from 2.3 × 10-3 min-1 to 4.8 × 10-3 min-1). Periodic DFT methods are extensively employed and we show that after the generation of charge separation in the modelled titania systems, adsorbed chlorides are the preferential site for partial hole localisation, although small energy differences are computed between partially localised hole densities over adsorbed chloride or hydroxyl. Moreover, chlorides can reduce or inhibit the ability of r-TiO2 (110) and a-TiO2 (101) systems to localise polarons in the slab structure. These results indicate that both mechanisms - hole scavenging and the inhibition of hole localisation - can be the origin of the effect of chlorides on photocatalytic activity of both titania polymorphs. These results provide fundamental insight into the photocatalytic properties of titania polymorphs and elucidate the effect of adsorbed anions over radical formation and oxidative decomposition of organic pollutants.
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Affiliation(s)
- Maicon Delarmelina
- School of Chemistry, Cardiff University, Cardiff, CF10 3AT, UK. .,UK Catalysis Hub, Research Complex at Harwell, STFC Rutherford Appleton Laboratory, Didcot, Oxfordshire, OX11 0FA, UK
| | - Mbongiseni W Dlamini
- UK Catalysis Hub, Research Complex at Harwell, STFC Rutherford Appleton Laboratory, Didcot, Oxfordshire, OX11 0FA, UK.,Max Planck-Cardiff Centre on the Fundamentals of Heterogeneous Catalysis FUNCAT, Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT, UK
| | - Samuel Pattisson
- Max Planck-Cardiff Centre on the Fundamentals of Heterogeneous Catalysis FUNCAT, Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT, UK
| | - Philip R Davies
- UK Catalysis Hub, Research Complex at Harwell, STFC Rutherford Appleton Laboratory, Didcot, Oxfordshire, OX11 0FA, UK.,Max Planck-Cardiff Centre on the Fundamentals of Heterogeneous Catalysis FUNCAT, Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT, UK
| | - Graham J Hutchings
- UK Catalysis Hub, Research Complex at Harwell, STFC Rutherford Appleton Laboratory, Didcot, Oxfordshire, OX11 0FA, UK.,Max Planck-Cardiff Centre on the Fundamentals of Heterogeneous Catalysis FUNCAT, Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT, UK
| | - C Richard A Catlow
- School of Chemistry, Cardiff University, Cardiff, CF10 3AT, UK. .,UK Catalysis Hub, Research Complex at Harwell, STFC Rutherford Appleton Laboratory, Didcot, Oxfordshire, OX11 0FA, UK.,Department of Chemistry, University College London, 20 Gordon St., London WC1 HOAJ, UK
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5
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Guo Y, Chen C, Lin C, Zhu L, Liu H. High‐performance quaternized hollow fiber membrane with sponge pore structure for fast adsorbing dichloroacetic acid from water by flow‐through adsorption. J Appl Polym Sci 2023. [DOI: 10.1002/app.53638] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Yao‐Shen Guo
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science & Engineering Zhejiang University Hangzhou China
- Ningbo Fotile Kitchen Ware Company Ningbo China
- Key Laboratory of Healthy & Intelligent Kitchen System Integration of Zhejiang Province Ningbo China
| | - Cheng Chen
- Ningbo Fotile Kitchen Ware Company Ningbo China
| | - Chun‐Er Lin
- Ningbo Fotile Kitchen Ware Company Ningbo China
- Key Laboratory of Healthy & Intelligent Kitchen System Integration of Zhejiang Province Ningbo China
| | - Li‐Ping Zhu
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science & Engineering Zhejiang University Hangzhou China
| | - Hong‐Xing Liu
- Ningbo Fotile Kitchen Ware Company Ningbo China
- Healthy & Intelligent Kitchen Engineering Research Center of Zhejiang Province Ningbo China
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6
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Díaz-Sánchez M, Hernández-Benítez I, Díaz-García D, Prashar S, Gómez-Ruiz S. Nanohybrids based on F-doped titanium dioxides and carbon species with enhanced dual adsorption-photodegradation activity for water decontamination. CATAL COMMUN 2022. [DOI: 10.1016/j.catcom.2022.106477] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022] Open
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7
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Hu W, Chen S, Hao H, Jiang H. Enhanced Photoreactivity of
MOFs
by Intercalating Interlayer Bands via Simultaneous −N=C=O and −
SCu
Modification. AIChE J 2022. [DOI: 10.1002/aic.17879] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Wei‐Fei Hu
- Department of Applied Chemistry University of Science and Technology of China Hefei China
| | - Shuo Chen
- Department of Applied Chemistry University of Science and Technology of China Hefei China
| | - Hong‐Chao Hao
- Department of Applied Chemistry University of Science and Technology of China Hefei China
| | - Hong Jiang
- Department of Applied Chemistry University of Science and Technology of China Hefei China
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8
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Shen K, Gao B, Xia H, Deng W, Yan J, Guo X, Guo Y, Wang X, Zhan W, Dai Q. Oxy-Anionic Doping: A New Strategy for Improving Selectivity of Ru/CeO 2 with Synergetic Versatility and Thermal Stability for Catalytic Oxidation of Chlorinated Volatile Organic Compounds. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2022; 56:8854-8863. [PMID: 35536552 DOI: 10.1021/acs.est.2c00942] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Understanding the formation and inhibition of more toxic polychlorinated byproducts from the catalytic oxidation elimination of chlorinated volatile organic compounds (Cl-VOCs) and unveiling efficient strategies have been essential and challenging. Here, RuOx supported on CePO4-doped CeO2 nanosheets (Ru/Pi-CeO2) is designed for boosting catalytic oxidation for the removal of dichloromethane (DCM) as a representative Cl-VOC. The promoted acid strength/number and sintering resistance due to the doping of electron-rich and thermally stable CePO4 are observed along with the undescended redox ability and the exposed multi-active sites, which demonstrates a high activity and durability of DCM oxidation (4000 mg/m3 and 15,000 mL/g·h, stable complete-oxidation at 300 °C), exceptional versatility for different Cl-VOCs, alkanes, aromatics, N-containing VOCs, CO and their multicomponent VOCs, and enhanced thermal stability. The suppression of polychlorinated byproducts is determined over Ru/Pi-CeO2 and oxy-anionic S, V, Mo, Nb, or W doping CeO2, thus the oxy-anionic doping strategy is proposed based on the quenching of the electron-rich oxy-anions on chlorine radicals. Moreover, the simple mechanical mixing with these oxy-anionic salts is also workable even for other catalysts such as Co, Sn, Mn, and noble metal-based catalysts. This work offers further insights into the inhibition of polychlorinated byproducts and contributes to the convenient manufacture of monolithic catalysts with superior chlorine-poisoning resistance for the catalytic oxidation of Cl-VOCs.
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Affiliation(s)
- Kai Shen
- Key Laboratory for Advanced Materials, Research Institute of Industrial Catalysis, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, P. R. China
| | - Biao Gao
- Key Laboratory for Advanced Materials, Research Institute of Industrial Catalysis, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, P. R. China
| | - Hangqi Xia
- Erdos Electric Power and Metallurgy Group Co. Ltd., Ordos 016064, Inner Mongolia, P. R. China
| | - Wei Deng
- School of Optoelectronic Materials and Technology, Jianghan University, Wuhan 430056, P. R. China
| | - Jiaorong Yan
- Key Laboratory for Advanced Materials, Research Institute of Industrial Catalysis, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, P. R. China
| | - Xiaohan Guo
- Key Laboratory for Advanced Materials, Research Institute of Industrial Catalysis, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, P. R. China
| | - Yanglong Guo
- Key Laboratory for Advanced Materials, Research Institute of Industrial Catalysis, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, P. R. China
| | - Xingyi Wang
- Key Laboratory for Advanced Materials, Research Institute of Industrial Catalysis, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, P. R. China
| | - Wangcheng Zhan
- Key Laboratory for Advanced Materials, Research Institute of Industrial Catalysis, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, P. R. China
| | - Qiguang Dai
- Key Laboratory for Advanced Materials, Research Institute of Industrial Catalysis, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, P. R. China
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9
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Sharma A, Ming J, Liu N, Sun X, Zhu Y, Yano M, Chen G, Yang Y. Sustainable and efficient reduction of pollutants by immobilized PEG-P/Ag/Ag 2O/Ag 3PO 4/TiO 2 photocatalyst for purification of saline wastewater. MARINE POLLUTION BULLETIN 2022; 179:113731. [PMID: 35576679 DOI: 10.1016/j.marpolbul.2022.113731] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2022] [Revised: 04/17/2022] [Accepted: 05/01/2022] [Indexed: 06/15/2023]
Abstract
In this study, we have reported an efficient and stable degradation of pollutants at salinity condition using newly developed solar-light-driven silicone-TiO2 based photocatalytic immobilized system. The interfacial layer of Silicone-PEG-P/Ag/Ag2O/Ag3PO4/TiO2 (S-PEG/PAgT) photocatalyst exhibited higher surface roughness, hydrophobicity, better light absorption, and narrow band gap than S-TiO2. The Rh B degradation by S-PEG/PAgT (91.2%) was 1.71 folds higher than S-TiO2 (53.5%) under simulated solar light irradiation. The reduction rate was significantly higher in S-PEG/PAgT (0.0792 min-1) than S-TiO2 (0.0229 min-1). The S-PEG/PAgT demonstrated high TOC removal (>80%), high repeatability (10 cycles) and excellent activity after 30 days of incubation in aqueous NaCl. The mechanism analysis revealed the synergistic effect of surface morphology with irregular chamfered edges and photoinduced reactive species (O2-) with successive formation of free chlorine radicals (Cl) contributed to the removal of pollutants in saline wastewater. Therefore, considering the above advantages of high efficiency and effective elimination of organics illustrates the potential of newly developed S-PEG/PAgT immobilized system in long-term practical treatment real seawater and ballast water.
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Affiliation(s)
- Aditya Sharma
- Graduate School of Life and Environmental Science, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan
| | - Jie Ming
- Graduate School of Life and Environmental Science, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan
| | - Na Liu
- Graduate School of Life and Environmental Science, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan
| | - Xiang Sun
- Graduate School of Life and Environmental Science, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan
| | - Yunxin Zhu
- Graduate School of Life and Environmental Science, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan
| | - Minami Yano
- Graduate School of Life and Environmental Science, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan
| | - Guoping Chen
- Research Center for Functional Materials, National Institute for Materials Sciences, 1-1-1 Namiki, Tsukuba, Ibaraki 305-0004, Japan
| | - Yingnan Yang
- Graduate School of Life and Environmental Science, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan.
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10
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Chang F, Wang X, Zhao S, Zhang X, Hu X. Fabrication of Bi12GeO20/Bi2S3 hybrids with surface oxygen vacancies by a facile CS2-mediated manner and enhanced photocatalytic performance in water and saline water. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.120532] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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11
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Wang C, Wu G, Zhu X, Xing Y, Yuan X, Qu J. Synergistic degradation for o-chlorophenol and enhancement of power generation by a coupled photocatalytic-microbial fuel cell system. CHEMOSPHERE 2022; 293:133517. [PMID: 34995621 DOI: 10.1016/j.chemosphere.2022.133517] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2021] [Revised: 12/24/2021] [Accepted: 12/31/2021] [Indexed: 06/14/2023]
Abstract
A hierarchically photocatalytic microbial fuel cell system (PMFC) coupled with TiO2 photoanode and bioanode was established to enhance the power generation based on single-chamber MFC. Compared with the conventional anaerobic mode, oxygen in the solution could be utilized by the photoanode of PMFC to improve the removal of o-chlorophenol (2-CP). The maximum power densities were increasing from 261 (MFC) to 301 mW/m2 (PMFC). The removal efficiency of 2-CP (5 mg/L) in PMFC was 76.20% and higher than that in MFC (19.33%) and by photocatalysis (49.23%). The electron-hole separation efficiencies were decreasing with the increasing of dissolved oxygen, causing a low efficiency of photocatalysis, due to the reduction of the current density of the systems. The abundance of Geobacter sp., PHOS-HE36 fam., and Pseudomonas sp. was increased with illumination, contributing to improve the electricity production and 2-CP degradation. The only detective intermediate of 1,2-dichlorobenzene in PMFC indicated that the microbes could regulate the degradation pathway of 2-CP in the coupling system. These findings provided an feasible method for the effective degradation of refractory organic compounds and simultaneous energy recovery by combining photocatalysis and microbial power generation.
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Affiliation(s)
- Chengzhi Wang
- School of Environment, Northeast Normal University, Changchun, Jilin, 130024, China
| | - Guanlan Wu
- School of Environment, Northeast Normal University, Changchun, Jilin, 130024, China
| | - Xiaolin Zhu
- School of Environment, Northeast Normal University, Changchun, Jilin, 130024, China.
| | - Yi Xing
- School of Environment, Northeast Normal University, Changchun, Jilin, 130024, China
| | - Xing Yuan
- School of Environment, Northeast Normal University, Changchun, Jilin, 130024, China
| | - Jiao Qu
- School of Environment, Northeast Normal University, Changchun, Jilin, 130024, China.
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12
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Dong G, Chen B, Liu B, Hounjet LJ, Cao Y, Stoyanov SR, Yang M, Zhang B. Advanced oxidation processes in microreactors for water and wastewater treatment: Development, challenges, and opportunities. WATER RESEARCH 2022; 211:118047. [PMID: 35033742 DOI: 10.1016/j.watres.2022.118047] [Citation(s) in RCA: 36] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2021] [Revised: 12/11/2021] [Accepted: 01/05/2022] [Indexed: 06/14/2023]
Abstract
The miniaturization of reaction processes by microreactors offers many significant advantages over the use of larger, conventional reactors. Microreactors' interior structures exhibit comparatively higher surface area-to-volume ratios, which reduce reactant diffusion distances, enable faster and more efficient heat and mass transfer, and better control over process conditions. These advantages can be exploited to significantly enhance the performance of advanced oxidation processes (AOPs) commonly used for the removal of water pollutants. This comprehensive review of the rapidly emerging area of environmental microfluidics describes recent advances in the development and application of microreactors to AOPs for water and wastewater treatment. Consideration is given to the hydrodynamic properties, construction materials, fabrication techniques, designs, process features, and upscaling of microreactors used for AOPs. The use of microreactors for various AOP types, including photocatalytic, electrochemical, Fenton, ozonation, and plasma-phase processes, showcases how microfluidic technology enhances mass transfer, improves treatment efficiency, and decreases the consumption of energy and chemicals. Despite significant advancements of microreactor technology, organic pollutant degradation mechanisms that operate during microscale AOPs remain poorly understood. Moreover, limited throughput capacity of microreactor systems significantly restrains their industrial-scale applicability. Since large microreactor-inspired AOP systems are needed to meet the high-throughput requirements of the water treatment sector, scale-up strategies and recommendations are suggested as priority research opportunities. While microstructured reactor technology remains in an early stage of development, this work offers valuable insight for future research and development of AOPs in microreactors for environmental purposes.
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Affiliation(s)
- Guihua Dong
- Northern Region Persistent Organic Pollution Control (NRPOP) Laboratory, Faculty of Engineering and Applied Science, Memorial University of Newfoundland, St. John's, NL A1B 3X5, Canada
| | - Bing Chen
- Northern Region Persistent Organic Pollution Control (NRPOP) Laboratory, Faculty of Engineering and Applied Science, Memorial University of Newfoundland, St. John's, NL A1B 3X5, Canada.
| | - Bo Liu
- Northern Region Persistent Organic Pollution Control (NRPOP) Laboratory, Faculty of Engineering and Applied Science, Memorial University of Newfoundland, St. John's, NL A1B 3X5, Canada
| | - Lindsay J Hounjet
- Natural Resources Canada, CanmetENERGY Devon, 1 Oil Patch Drive, Devon, AB T9G 1A8, Canada
| | - Yiqi Cao
- Northern Region Persistent Organic Pollution Control (NRPOP) Laboratory, Faculty of Engineering and Applied Science, Memorial University of Newfoundland, St. John's, NL A1B 3X5, Canada
| | - Stanislav R Stoyanov
- Natural Resources Canada, CanmetENERGY Devon, 1 Oil Patch Drive, Devon, AB T9G 1A8, Canada.
| | - Min Yang
- Northern Region Persistent Organic Pollution Control (NRPOP) Laboratory, Faculty of Engineering and Applied Science, Memorial University of Newfoundland, St. John's, NL A1B 3X5, Canada
| | - Baiyu Zhang
- Northern Region Persistent Organic Pollution Control (NRPOP) Laboratory, Faculty of Engineering and Applied Science, Memorial University of Newfoundland, St. John's, NL A1B 3X5, Canada
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13
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Díaz-Sánchez M, Delgado-Álvarez PN, Gómez IJ, Díaz-García D, Prashar S, Gómez-Ruiz S. Modulation of the photocatalytic activity and crystallinity of F-TiO 2 nanoparticles by using green natural carboxylic acids. CrystEngComm 2022. [DOI: 10.1039/d2ce00699e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Ultrareactive F-doped mesoporous TiO2 nanoparticles with potential environmental applications have been synthesized using green natural carboxylic acids.
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Affiliation(s)
- Miguel Díaz-Sánchez
- COMET-NANO Group, Departamento de Biología y Geología, Física y Química Inorgánica, E.S.C.E.T, Universidad Rey Juan Carlos, Calle Tulipán s/n, E-28933 Móstoles, Madrid, Spain
| | - Paula N. Delgado-Álvarez
- COMET-NANO Group, Departamento de Biología y Geología, Física y Química Inorgánica, E.S.C.E.T, Universidad Rey Juan Carlos, Calle Tulipán s/n, E-28933 Móstoles, Madrid, Spain
| | - I. Jénnifer Gómez
- Department of Condensed Matter Physics, Faculty of Science, Masaryk University, 61137 Brno, Czech Republic
| | - Diana Díaz-García
- COMET-NANO Group, Departamento de Biología y Geología, Física y Química Inorgánica, E.S.C.E.T, Universidad Rey Juan Carlos, Calle Tulipán s/n, E-28933 Móstoles, Madrid, Spain
| | - Sanjiv Prashar
- COMET-NANO Group, Departamento de Biología y Geología, Física y Química Inorgánica, E.S.C.E.T, Universidad Rey Juan Carlos, Calle Tulipán s/n, E-28933 Móstoles, Madrid, Spain
| | - Santiago Gómez-Ruiz
- COMET-NANO Group, Departamento de Biología y Geología, Física y Química Inorgánica, E.S.C.E.T, Universidad Rey Juan Carlos, Calle Tulipán s/n, E-28933 Móstoles, Madrid, Spain
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14
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Influence of morphology on photoanodic behaviour of WO3 films in chloride and sulphate electrolytes. Electrochim Acta 2022. [DOI: 10.1016/j.electacta.2021.139710] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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15
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Lu T, Gao Y, Yang Y, Ming H, Huang Z, Liu G, Zheng D, Zhang J, Hou Y. Efficient degradation of tetracycline hydrochloride by photocatalytic ozonation over Bi 2WO 6. CHEMOSPHERE 2021; 283:131256. [PMID: 34182642 DOI: 10.1016/j.chemosphere.2021.131256] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2021] [Revised: 06/14/2021] [Accepted: 06/15/2021] [Indexed: 06/13/2023]
Abstract
Photocatalytic ozonation technique for wastewater treatment has received much attention for their efficient capability in the mineralization of persistent organic pollutants. In this study, nanostructured Bi2WO6 was prepared by hydrothermal method and applied in the photocatalytic ozonation process for tetracycline hydrochloride (TCH) degradation under simulated solar light irradiation. Bi2WO6 triggered an effective synergy between photocatalysis and ozonation, and it showed a good activity and adaptability in the degradation of organic compounds. Besides, the influence of experimental factors on the total organic carbon removal (including catalyst dosage, ozone concentration, initial pH, reaction temperature and coexisting ions) was also investigated comprehensively. Spin-trapping electron paramagnetic resonance measurements and quenching experiments demonstrated that O2-, OH, 1O2 and h+ contributed to TCH degradation. The possible degradation pathways of TCH were proposed by identifying the intermediates with liquid chromatography-mass spectroscopy.
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Affiliation(s)
- Tong Lu
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, 350108, PR China
| | - Yan Gao
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, 350108, PR China
| | - Yang Yang
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, 350108, PR China
| | - Hongbo Ming
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, 350108, PR China
| | - Zhongcheng Huang
- College of Environment & Resources, Fuzhou University, Fuzhou, 350108, PR China
| | - Guodong Liu
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, 350108, PR China
| | - DanDan Zheng
- College of Environment & Resources, Fuzhou University, Fuzhou, 350108, PR China.
| | - Jinshui Zhang
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, 350108, PR China
| | - Yidong Hou
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, 350108, PR China.
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16
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Dehdar A, Asgari G, Leili M, Madrakian T, Seid-Mohammadi A. Step-scheme BiVO 4/WO 3 heterojunction photocatalyst under visible LED light irradiation removing 4-chlorophenol in aqueous solutions. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2021; 297:113338. [PMID: 34303937 DOI: 10.1016/j.jenvman.2021.113338] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2021] [Revised: 07/11/2021] [Accepted: 07/18/2021] [Indexed: 06/13/2023]
Abstract
In the present study, photodegradation of 4-chlorophenol (4-CP) using a step-scheme BiVO4/WO3 heterostructure under visible LED light irradiation (Vis LED) from aqueous solutions was investigated. The photocatalyst was synthesized through the hydrothermal process and characterized physically and chemically via X-ray diffraction (XRD), field emission scanning electron microscope (FE-SEM), energy-dispersive X-ray (EDX), and Brunnauer-Emmett-Teller (BET) techniques. The effects of the operational parameters i.e., solution pH, contact time, nanocomposite dosage, and initial 4-CP concentration were evaluated. Results indicated that BiVO4/WO3/Vis LED process has higher efficiency in 4-CP degradation than BiVO4/Vis LED, WO3/Vis LED, and BiVO4/WO3 systems. At BiVO4/WO3 concentration of 0.125 g/L, initial pH of 7, and initial 4-CP concentration of 25 mg/L, complete degradation of 4-CP (>97%) was achieved in reaction time of 60 min. The phenol, chlorobenzene, catechol, 4-chlorocatechol, 5-chloro-1,2,4-benzenetriol, hydroquinone, hydroxyhydroquinone, p-benzoquinone, o-benzoquinone, formic acid, acetic acid, and oxalic acid were identified as the major intermediates of 4-CP degradation. In optimal condition, 67.5% and 88.5% of TOC and COD removal rates were obtained in 120 min contact time, respectively. The degradation of 4-CP was pseudo-first-order kinetics. Through the use of tert-Butyl alcohol (TBA) and ethylenediamine tetraacetic acid (EDTA) as radical scavengers, hydroxyl radicals and holes were identified as the main active species in photocatalytic degradation. Also, a tentative pathway for 4-CP degradation using the Vis LED/BiVO4/WO3 process was proposed.
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Affiliation(s)
- Ali Dehdar
- Department of Environmental Health Engineering, School of Public Health, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Ghorban Asgari
- Social Determinants of Health Research Center (SDHRC), Department of Environmental Health Engineering, School of Public Health, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Mostafa Leili
- Department of Environmental Health Engineering, School of Public Health, Hamadan University of Medical Sciences, Hamadan, Iran
| | | | - Abdolmotaleb Seid-Mohammadi
- Social Determinants of Health Research Center (SDHRC), Department of Environmental Health Engineering, School of Public Health, Hamadan University of Medical Sciences, Hamadan, Iran.
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17
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Cheng G, Zhang Y, Sun L, Wan J, Li Z, Dang C, Fu J. Enhanced degradation of reactive brilliant red X-3B by photocatalysis integrated with micro-electrolysis. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:49899-49912. [PMID: 33945093 DOI: 10.1007/s11356-021-14205-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2020] [Accepted: 04/27/2021] [Indexed: 06/12/2023]
Abstract
The microwave electrodeless lamp UV photocatalysis (MWUV) integrated with iron carbon micro-electrolysis (ME) was applied to degrade reactive brilliant red X-3B. In the present study, the removal rate of X-3B by MWUV/ME was 95%, which was significantly higher than 56% of MWUV and 62% of ME system. The experiment results demonstrated a synergistic effect in MWUV/ME system, wherein the ME system played an important role in color removal and the formation of ·OH in photocatalysis contributed most for the mineralization of X-3B and its intermediates. The removal efficiency of TOC was 32%, 7.5%, and 59.5% under MWUV, ME, and MWUV/ME processes at the end of the reaction, respectively. The Fe3+ existed in the system was an enhancer of producing ·OH via self-generation of ·OH by UV irradiation or improving the separation of electron-hole in photocatalysis by capturing the electrons. Therefore, the combined treatment of MWUV and ME system has the potential of synergistic effect compared to the separate process. Lowering the initial solution pH and increasing the iron filing dosage and dissolved oxygen were beneficial for the enhancement of degradation efficiency. The inorganic anions showed a diversity influencing the degradation of X-3B. NO3-, CO32-, and SO42- (at higher concentration) promoted the degradation reaction, while Cl- had non-significant effect.
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Affiliation(s)
- Gong Cheng
- School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China
- Environmental Engineering Center, Shenzhen Academy of Environmental Sciences, Shenzhen, 518001, China
- Engineering Research Center for Cleaner Production of Textile Dyeing and Printing under Ministry of Education, Wuhan Textile University, Wuhan, 430073, China
| | - Yibo Zhang
- School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China
| | - Lei Sun
- Environmental Engineering Center, Shenzhen Academy of Environmental Sciences, Shenzhen, 518001, China
| | - Jing Wan
- School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China
| | - Zhang Li
- School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China
| | - Chenyuan Dang
- School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China
| | - Jie Fu
- School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China.
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18
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Effect of Potential and Chlorides on Photoelectrochemical Removal of Diethyl Phthalate from Water. Catalysts 2021. [DOI: 10.3390/catal11080882] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Removal of persistent pollutants from water by photoelectrocatalysis has emerged as a promising powerful process. Applied potential plays a key role in the photocatalytic activity of the semi-conductor as well as the possible presence of chloride ions in the solution. This work aims to investigate these effects on the photoelectrocatalytic oxidation of diethyl phthalate (DEP) by using TiO2 nanotubular anodes under solar light irradiation. PEC tests were performed at constant potentials under different concentration of NaCl. The process is able to remove DEP following a pseudo-first order kinetics: values of kapp of 1.25 × 10−3 min−1 and 1.56 × 10−4 min−1 have been obtained at applied potentials of 1.8 and 0.2 V, respectively. Results showed that, depending on the applied potential, the presence of chloride ions in the solution affects the degradation rate resulting in a negative effect: the presence of 500 mM of Cl− reduces the value of kapp by 50 and 80% at 0.2 and 1.8 V respectively.
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19
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Petala A, Arvaniti OS, Travlou G, Mantzavinos D, Frontistis Z. Solar light induced photocatalytic removal of sulfamethoxazole from water and wastewater using BiOCl photocatalyst. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART A, TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING 2021; 56:963-972. [PMID: 34232806 DOI: 10.1080/10934529.2021.1948271] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Revised: 06/15/2021] [Accepted: 06/18/2021] [Indexed: 06/13/2023]
Abstract
The photocatalytic activity of bismuth oxychloride (BiOCl) toward sulfamethoxazole (SMX) elimination was investigated. BiOCl was synthesized according to a simple method using thiourea. Its physicochemical characteristics were determined by nitrogen physisorption, X-Ray diffraction, diffuse reflectance spectroscopy, scanning electron microscopy and transmission electron microscopy. Simulated solar irradiation and 1 g/L BiOCl, could effectively remove 0.5 mg/L SMX in less than 90 min. An increase in SMX concentration from 0.25 mg/L to 4 mg/L decreased the observed kinetic constant. Concerning the pH effect, it was found that under alkaline conditions SMX removal was slightly hindered. The water matrix's influence on SMX removal was explored, carrying out experiments in real water matrices, (bottled water (BW) and secondary effluent (WW)). Interestingly SMX removal was not practically altered in WW secondary effluent, but it was slightly hindered in BW bottled water. Experiments, performed in synthetic matrices, revealed that the presence of bicarbonates and chlorides slightly slowed down degradation kinetics, while humic acid enhanced SMX removal at concentrations up to 10 mg/L. Finally, an enhancement on SMX degradation was observed in the presence of persulfate. Quenching experiments of potential reactive species revealed that SMX degradation takes place mainly through reaction with hydroxyl radicals and photogenerated electrons.
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Affiliation(s)
- Athanasia Petala
- Department of Chemical Engineering, University of Patras, Patras, Greece
| | - Olga S Arvaniti
- Department of Chemical Engineering, University of Patras, Patras, Greece
| | - Georgia Travlou
- Department of Chemical Engineering, University of Patras, Patras, Greece
| | | | - Zacharias Frontistis
- Department of Chemical Engineering, University of Western Macedonia, Kozani, Greece
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20
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Morais DFS, Boaventura RAR, Moreira FC, Vilar VJP. Bromate removal from water intended for human consumption by heterogeneous photocatalysis: Effect of major dissolved water constituents. CHEMOSPHERE 2021; 263:128111. [PMID: 33297104 DOI: 10.1016/j.chemosphere.2020.128111] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Revised: 08/05/2020] [Accepted: 08/24/2020] [Indexed: 06/12/2023]
Abstract
This study focuses on the influence of major dissolved constituents naturally found in waters intended for human consumption on bromate (BrO3-) reduction by heterogeneous photocatalysis. The individual and combined effect of chloride (Cl-), bicarbonate/carbonic acid (HCO3-/H2CO3), nitrate (NO3-), sulphate (SO42-) and humic acids (HAs) on BrO3- reduction was evaluated in synthetic waters (SWs). Additionally, freshwaters (FWs) from a drinking water treatment plant (DWTP) were tested and directly compared to SWs. Cl- was beneficial for contents in the range 0.47-1.4 mM, with negligible influence for lower and higher contents. NO3- had a null effect regardless of its content (0.024-0.81 mM). HCO3-/H2CO3 (0.061/0.45 mM), SO42- (0.12-2.6 mM) and HAs (0.11-1.0 mM C) had a negative effect in the tested contents. The BrO3- reduction rate was 2.8 times lower in SW with a mixture of water constituents compared to SW without constituents addition. This decline on BrO3- reduction rate corresponded to the sum of the individual species contribution and so there was no evidence of synergetic effects. By contrast, the use of FWs provided BrO3- reduction rates only slightly lower than that found for SW without constituents addition (∼1.2-fold), which can be attributed to: (i) the distinct characteristics of the organic matter of FWs (HAs, fulvic acids and humins with distinct molecular weights and functional groups) compared to that of SW (pure HAs), and/or (ii) the presence in FWs of other inorganics in addition to those here addressed. The heterogeneous TiO2 photocatalysis proved to be a promising process for BrO3- reduction in DWTPs.
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Affiliation(s)
- Daniela F S Morais
- Laboratory of Separation and Reaction Engineering - Laboratory of Catalysis and Materials (LSRE-LCM), Departamento de Engenharia Química, Faculdade de Engenharia, Universidade Do Porto, Rua Dr. Roberto Frias, 4200-465, Porto, Portugal
| | - Rui A R Boaventura
- Laboratory of Separation and Reaction Engineering - Laboratory of Catalysis and Materials (LSRE-LCM), Departamento de Engenharia Química, Faculdade de Engenharia, Universidade Do Porto, Rua Dr. Roberto Frias, 4200-465, Porto, Portugal
| | - Francisca C Moreira
- Laboratory of Separation and Reaction Engineering - Laboratory of Catalysis and Materials (LSRE-LCM), Departamento de Engenharia Química, Faculdade de Engenharia, Universidade Do Porto, Rua Dr. Roberto Frias, 4200-465, Porto, Portugal.
| | - Vítor J P Vilar
- Laboratory of Separation and Reaction Engineering - Laboratory of Catalysis and Materials (LSRE-LCM), Departamento de Engenharia Química, Faculdade de Engenharia, Universidade Do Porto, Rua Dr. Roberto Frias, 4200-465, Porto, Portugal.
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21
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Belousov AS, Suleimanov EV, Fukina DG. Pyrochlore oxides as visible light-responsive photocatalysts. NEW J CHEM 2021. [DOI: 10.1039/d1nj04439g] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
This perspective describes the use of pyrochlore oxides in photocatalysis with focus on the strategies to enhance their activity.
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Affiliation(s)
- Artem S. Belousov
- Lobachevsky State University of Nizhny Novgorod, Research Institute for Chemistry, Gagarin Avenue 23, Nizhny Novgorod, 603950, Russian Federation
| | - Evgeny V. Suleimanov
- Lobachevsky State University of Nizhny Novgorod, Research Institute for Chemistry, Gagarin Avenue 23, Nizhny Novgorod, 603950, Russian Federation
| | - Diana G. Fukina
- Lobachevsky State University of Nizhny Novgorod, Research Institute for Chemistry, Gagarin Avenue 23, Nizhny Novgorod, 603950, Russian Federation
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22
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Xu W, Zhao X, An X, Wang S, Zhang J, Li Z, Wu W, Wu M. Alkali Halide Boost of Carbon Nitride for Photocatalytic H 2 Evolution in Seawater. ACS APPLIED MATERIALS & INTERFACES 2020; 12:48526-48532. [PMID: 33047949 DOI: 10.1021/acsami.0c13060] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Photocatalytic H2 evolution (PHE) from extremely abundant seawater resources is an ideal way to secure sustainable H2 for humanity, but the saline in seawater easily competitively absorbs the active sites and poisons the catalyst. Herein, a series of low-cost alkali halide (NaI, KI, RbI, CsI, CsBr, and CsCl), analogous to the saline in natural seawater, was selected to modify carbon nitride (MX-CN) through one-step facile pyrolysis with the assistance of water. MX-CN possesses a large amount of negative charges, which could inhibit anion absorption, to some extent, preventing chloride corrosion. Importantly, it can greatly boost the electron transfer between MX-CN and triethanolamine (TEOA) (sacrificial agent) because the alkali cation in seawater can coordinate with TEOA, and easily come in contact with MX-CN through alkali-cation exchange and electrostatic attraction. Benefiting from it, the PHE performance in seawater is 200 times better than that of original CN in deionized water above, and the apparent quantum efficiency of MX-CN (CsI-CN) under 420 nm light irradiation comes to 72% in seawater, the highest value reported for seawater thus far. This work provides a new research direction for engineering the electron transfer pathway between the photocatalyst and sacrificial agent (e.g., pollutant) in natural seawater.
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Affiliation(s)
- Wenming Xu
- State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum (East China), No. 66 Changjiang West Road, Qingdao 266580, P. R. China
| | - Xuedong Zhao
- State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum (East China), No. 66 Changjiang West Road, Qingdao 266580, P. R. China
| | - Xianghui An
- State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum (East China), No. 66 Changjiang West Road, Qingdao 266580, P. R. China
| | - Sha Wang
- Jiangsu Provincial Key Laboratory of Pulp and Paper Science and Technology, Nanjing Forestry University, No.159 Longpan Road, Nanjing 210037, China
| | - Jing Zhang
- State Key Laboratory of Safety and Control for Chemicals, SINOPEC Research Institute of Safety Engineering, No. 339 Songling Road, Qingdao 266071, China
| | - Zishu Li
- Valiant Limited Company, No. 11 Wuzhishan Road, Yeda 264006, China
| | - Wenting Wu
- State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum (East China), No. 66 Changjiang West Road, Qingdao 266580, P. R. China
| | - Mingbo Wu
- State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum (East China), No. 66 Changjiang West Road, Qingdao 266580, P. R. China
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24
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Schneider JT, Firak DS, Ribeiro RR, Peralta-Zamora P. Use of scavenger agents in heterogeneous photocatalysis: truths, half-truths, and misinterpretations. Phys Chem Chem Phys 2020; 22:15723-15733. [DOI: 10.1039/d0cp02411b] [Citation(s) in RCA: 88] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The use of scavenger agents must be thoughtfully considered in mechanistic investigations of heterogeneous photocatalysis since atypical radicals are produced.
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25
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Abstract
The aim of this work was to analyze the effect of visible LED dimming duty-cycle modulation techniques in a photocatalytic system for urea degradation using a visible light photocatalyst immobilized on macroscopic supports. For this reason, the effect of different LED dimming techniques was investigated and compared in terms of urea degradation together with ammonia and nitrate production during the irradiation time. The experimental results evidenced that using a visible LED dimming modulation with variable-peak variable-duty pulse-width modulation (PWM) allows to improve the photocatalytic degradation process, with respect to classical LED dimming with fixed-peak fixed-duty PWM, and influences the product’s distribution of ammonia and nitrate in water. Therefore, the proof of concept herein proposed could be considered as preliminary potential results to be used in water recycling applications with a particular emphasis in recovery of urea photodegradation byproducts, such as ammonia, from wastewater that could be used as potential resources and an energy resource.
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26
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Brüninghoff R, van Duijne AK, Braakhuis L, Saha P, Jeremiasse AW, Mei B, Mul G. Comparative Analysis of Photocatalytic and Electrochemical Degradation of 4-Ethylphenol in Saline Conditions. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2019; 53:8725-8735. [PMID: 31282148 PMCID: PMC6686150 DOI: 10.1021/acs.est.9b01244] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2019] [Revised: 07/03/2019] [Accepted: 07/08/2019] [Indexed: 06/03/2023]
Abstract
We evaluated electrochemical degradation (ECD) and photocatalytic degradation (PCD) technologies for saline water purification, with a focus on rate comparison and formation and degradation of chlorinated aromatic intermediates using the same non-chlorinated parent compound, 4-ethylphenol (4EP). At 15 mA·cm-2, and in the absence of chloride (0.6 mol·L-1 NaNO3 was used as supporting electrolyte), ECD resulted in an apparent zero-order rate of 30 μmol L-1·h-1, whereas rates of ∼300 μmol L-1·h-1 and ∼3750 μmol L-1·h-1 were computed for low (0.03 mol·L-1) and high (0.6 mol·L-1) NaCl concentration, respectively. For PCD, initial rates of ∼330 μmol L-1·h-1 and 205 μmol L-1·h-1 were found for low and high NaCl concentrations, at a photocatalyst (TiO2) concentration of 0.5 g·L-1, and illumination at λmax ≈ 375 nm, with an intensity ∼0.32 mW·cm-2. In the chlorine mediated ECD approach, significant quantities of free chlorine (hypochlorite, Cl2) and chlorinated hydrocarbons were formed in solution, while photocatalytic degradation did not show the formation of free chlorine, nor chlorine-containing intermediates, and resulted in better removal of non-purgeable hydrocarbons than ECD. The origin of the minimal formation of free chlorine and chlorinated compounds in photocatalytic degradation is discussed based on photoelectrochemical results and existing literature, and explained by a chloride-mediated surface-charge recombination mechanism.
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Affiliation(s)
- Robert Brüninghoff
- PhotoCatalytic
Synthesis Group, MESA+ Institute for Nanotechnology, Faculty of Science
and Technology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
| | - Alyssa K. van Duijne
- PhotoCatalytic
Synthesis Group, MESA+ Institute for Nanotechnology, Faculty of Science
and Technology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
| | - Lucas Braakhuis
- PhotoCatalytic
Synthesis Group, MESA+ Institute for Nanotechnology, Faculty of Science
and Technology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
| | - Pradip Saha
- Department
of Environmental Technology, Wageningen
University and Research, P.O. Box 17, 6700 AA Wageningen, The Netherlands
| | - Adriaan W. Jeremiasse
- MAGNETO
Special Anodes B.V. (an Evoqua brand), Calandstraat 109, 3125 BA Schiedam, The Netherlands
| | - Bastian Mei
- PhotoCatalytic
Synthesis Group, MESA+ Institute for Nanotechnology, Faculty of Science
and Technology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
| | - Guido Mul
- PhotoCatalytic
Synthesis Group, MESA+ Institute for Nanotechnology, Faculty of Science
and Technology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
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27
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Reaction Rate Study of the Photocatalytic Degradation of Dichloroacetic Acid in a Black Body Reactor. Catalysts 2019. [DOI: 10.3390/catal9080635] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
The light-induced degradation of dichloroacetic acid in aqueous suspensions containing the TiO2 photocatalyst Hombikat UV 100 was investigated. The reactions were performed in a black body reactor in which the rate of conversion, defined as the time derivative of the extent of conversion, is not affected by the light scattering properties of the photocatalysts. At sufficiently high concentrations of both the probe compound and the photocatalyst the rate of conversion was found to be unswayed by the initial concentration of the probe compound, the mass concentration of the photocatalyst, and the suspension volume. Thus, the chosen experimental conditions enable the determination of the rate of conversion and the quantum yield of the light induced degradation of dichloroacetic acid in aqueous photocatalyst suspension with sufficiently good reproducibility. The experimental procedure employed here seems to be generally applicable to determine rates of conversion and quantum yields that possibly allow a comparison of the activities of photocatalysts in aqueous suspensions.
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28
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Effective photocatalytic mechanism on dye decolorization in different water matrices with phenolic resins as a photocatalyst under visible LED irradiation. J Photochem Photobiol A Chem 2019. [DOI: 10.1016/j.jphotochem.2018.12.023] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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29
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Weiss M, Bredow T, Marschall R. The Influence of Tin(II) Incorporation on Visible Light Absorption and Photocatalytic Activity in Defect-Pyrochlores. Chemistry 2018; 24:18535-18543. [PMID: 30332500 DOI: 10.1002/chem.201803276] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2018] [Indexed: 11/06/2022]
Abstract
The defect pyrochlore KTaWO6 has been used to systematically investigate the effect of SnII incorporation conditions on the band structure and subsequent photocatalytic properties. Different tin precursors show varying influence on the resulting band gap. While the optimum conditions diminish the band gap by up to 1.4 eV, the increase in visible light absorption does not correlate with an increase of photocatalytic activity.
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Affiliation(s)
- Morten Weiss
- Institute of Physical Chemistry, Justus-Liebig-University Giessen, 35392, Giessen, Germany
| | - Thomas Bredow
- Mulliken Center for Theoretical Chemistry, Institute of Physical and Theoretical Chemistry, Rheinische Friedrich-Wilhelms-University Bonn, 53115, Bonn, Germany
| | - Roland Marschall
- Institute of Physical Chemistry, Justus-Liebig-University Giessen, 35392, Giessen, Germany.,Chair of Physical Chemistry III, University of Bayreuth, 95447, Bayreuth, Germany
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Minella M, Baudino M, Minero C. A revised photocatalytic transformation mechanism for chlorinated VOCs: Experimental evidence from C2Cl4 in the gas phase. Catal Today 2018. [DOI: 10.1016/j.cattod.2017.12.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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31
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Tayebee R, Mohammadzadeh Kakhki R, Audebert P, Amini MM, Salehi M, Mahdizadeh Ghohe N, Mandanipour V, Karimipour G. A robust UV-visible light-driven SBA-15-PS/phthalhydrazide nanohybrid material with enhanced photocatalytic activity in the photodegradation of methyl orange. Appl Organomet Chem 2018. [DOI: 10.1002/aoc.4391] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- R. Tayebee
- Department of Chemistry; Hakim Sabzevari University; Sabzevar 96179-76487 Iran
| | | | - P. Audebert
- Laboratoire de Photophysique et Photochimie Supramoléculaires et Macromoléculaires; UMR 8531 au CNRS, ENS de Cachan 94235 Cachan France
| | - M. M. Amini
- Department of Chemistry; Shahid Beheshti University; GC Tehran Iran
| | - M. Salehi
- Department of Chemistry; Yasuj University; Yasuj 75918-74831 Iran
| | - N. Mahdizadeh Ghohe
- Department of Chemistry; Hakim Sabzevari University; Sabzevar 96179-76487 Iran
| | - V. Mandanipour
- Department of Chemistry; University of Gonabad; Gonabad Iran
| | - G.R. Karimipour
- Department of Chemistry; Yasuj University; Yasuj 75918-74831 Iran
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32
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Kumar S, Verma A, Pal S, Sinha I. Curcumin-Functionalized Ag/Ag 2 O Nanocomposites: Efficient Visible-Light Z-scheme Photocatalysts. Photochem Photobiol 2018; 94:641-649. [PMID: 29438581 DOI: 10.1111/php.12910] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2017] [Accepted: 12/29/2017] [Indexed: 11/27/2022]
Abstract
Curcumin-functionalized Ag/Ag2 O (c-Ag/Ag2 O) nanocomposites with varying proportions of curcumin and Ag/Ag2 O were prepared by a simple one pot green synthesis protocol in aqueous medium. The plasmonic band undergoes slight redshift, broadening and decrease in intensity with increase in the proportion of Ag2 O formed. These composite nanoparticles were found to be efficient visible-light photocatalysts for aerobic oxidation of methyl orange and rhodamine B (RhB). Functionalization by curcumin significantly enhanced the photocatalytic activity with good reusability. The photocatalytic oxidation rate showed super linear increase with light intensity because of localized surface plasmon resonance (LSPR)-induced strong near field. The trapping experiments confirmed that superoxide radicals were the main active species responsible for the degradation reaction. A plasmonic Z-scheme photocatalytic mechanism is proposed to explain the possible charge transfer and separation behavior of electron-hole pairs among Ag, Ag2 O and curcumin under visible-light irradiation.
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Affiliation(s)
- Sunil Kumar
- Department of Chemistry, Indian Institute of Technology, Banaras Hindu University, Varanasi, India
| | - Alkadevi Verma
- Department of Chemistry, Indian Institute of Technology, Banaras Hindu University, Varanasi, India
| | - Shaili Pal
- Department of Chemistry, Indian Institute of Technology, Banaras Hindu University, Varanasi, India
| | - Indrajit Sinha
- Department of Chemistry, Indian Institute of Technology, Banaras Hindu University, Varanasi, India
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Rimoldi L, Meroni D, Falletta E, Pifferi V, Falciola L, Cappelletti G, Ardizzone S. Emerging pollutant mixture mineralization by TiO 2 photocatalysts. The role of the water medium. Photochem Photobiol Sci 2017; 16:60-66. [PMID: 27841891 DOI: 10.1039/c6pp00214e] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Pharmaceutics and personal care products (PPCPs) are raising growing concern due to their widespread usage and resistance to conventional remediation techniques. Several of them raise significant health and environmental concerns, especially when present in complex mixtures. Due to their chemical resistance, Advanced Oxidation Processes (AOPs) are needed for their complete removal from surface and wastewaters. In the present work, photocatalysis by titanium dioxide (TiO2) under UV and simulated solar irradiation was adopted to degrade tetracycline hydrochloride, paracetamol, caffeine and atenolol, both as single pollutants and in mixtures. All molecules showed high removal and mineralization degrees. Moreover, no interference effects decreased the efficiency of the processes in the case of pollutant mixtures, achieving 60% of mineralization after 6 h. An immobilized TiO2 system was also developed by depositing titania on titanium meshes. A 50% mineralization degree of the pollutant mixture was obtained after 6 h, revealing a suitable efficiency for field applications. Eventually, the impact of the matrix composition on the photocatalytic efficiency was investigated by studying the reaction both in simulated drinking water and in commercial bottled mineral water. The scavenger role played by HCO3- species appears to be dominant in inhibiting the mineralization.
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Affiliation(s)
- Luca Rimoldi
- Dipartimento di Chimica, Università degli Studi di Milano, Via Golgi 19, 20133 Milano, Italy. and Consorzio Interuniversitario Nazionale per la Scienza e la Tecnologia dei Materiali (INSTM), Via Giusti 9, 50121 Firenze, Italy
| | - Daniela Meroni
- Dipartimento di Chimica, Università degli Studi di Milano, Via Golgi 19, 20133 Milano, Italy. and Consorzio Interuniversitario Nazionale per la Scienza e la Tecnologia dei Materiali (INSTM), Via Giusti 9, 50121 Firenze, Italy
| | - Ermelinda Falletta
- Dipartimento di Chimica, Università degli Studi di Milano, Via Golgi 19, 20133 Milano, Italy.
| | - Valentina Pifferi
- Dipartimento di Chimica, Università degli Studi di Milano, Via Golgi 19, 20133 Milano, Italy. and Consorzio Interuniversitario Nazionale per la Scienza e la Tecnologia dei Materiali (INSTM), Via Giusti 9, 50121 Firenze, Italy
| | - Luigi Falciola
- Dipartimento di Chimica, Università degli Studi di Milano, Via Golgi 19, 20133 Milano, Italy. and Consorzio Interuniversitario Nazionale per la Scienza e la Tecnologia dei Materiali (INSTM), Via Giusti 9, 50121 Firenze, Italy
| | - Giuseppe Cappelletti
- Dipartimento di Chimica, Università degli Studi di Milano, Via Golgi 19, 20133 Milano, Italy. and Consorzio Interuniversitario Nazionale per la Scienza e la Tecnologia dei Materiali (INSTM), Via Giusti 9, 50121 Firenze, Italy
| | - Silvia Ardizzone
- Dipartimento di Chimica, Università degli Studi di Milano, Via Golgi 19, 20133 Milano, Italy. and Consorzio Interuniversitario Nazionale per la Scienza e la Tecnologia dei Materiali (INSTM), Via Giusti 9, 50121 Firenze, Italy
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Mohammadzadeh Kakhki R, Tayebee R, Hedayat S. Phthalhydrazide nanoparticles as new highly reusable organic photocatalyst in the photodegradation of organic and inorganic contaminants. Appl Organomet Chem 2017. [DOI: 10.1002/aoc.4033] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
| | - Reza Tayebee
- Department of ChemistryHakim Sabzevari University Sabzevar 96179‐76487 Iran
- Department of ChemistryPayame Noor University (PNU) Tehran 19395‐4697 Iran
| | - Sara Hedayat
- Department of ChemistryPayame Noor University (PNU) Tehran 19395‐4697 Iran
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Khuzwayo Z, Chirwa EMN. The impact of alkali metal halide electron donor complexes in the photocatalytic degradation of pentachlorophenol. JOURNAL OF HAZARDOUS MATERIALS 2017; 321:424-431. [PMID: 27669383 DOI: 10.1016/j.jhazmat.2016.08.069] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2016] [Revised: 08/17/2016] [Accepted: 08/29/2016] [Indexed: 06/06/2023]
Abstract
The performance of photocatalytic oxidation of chemical pollutants is subjected to the presence of anion complexes in natural waters. This study investigated the influence of alkali metal (Na+ (sodium), K+ (potassium)) halides (Cl- (chloride), Br- (bromide), F- (fluoride)) as inorganic ion sources in the photocatalytic degradation of pentachlorophenol (PCP) in batch systems. It was found that the exclusive presence of halides in the absence of an electron acceptor adequately facilitated the photocatalyst process below critical levels of anion populations, where beyond the critical point the process was significantly hindered. Below the determined critical point, the performance in some cases near matches that of the facilitation of the photocatalytic process by exclusive oxygen, acting as an electron scavenger. The coupling of halide ions and oxygenation presented significantly improved photo-oxidation of PCP, this was confirmed by the inclusion of formic acid as a comparative electron donor. The Langmuir-Hinshelwood kinetic expression was used to calculate the performance rate kinetics. The probable impact of the halide anions was discussed with regards to the process of electron hole pair recombination prevention.
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Affiliation(s)
- Z Khuzwayo
- Department of Chemical Engineering, Water Utilisation Division, University of Pretoria, Pretoria, 0002, South Africa.
| | - E M N Chirwa
- Department of Chemical Engineering, Water Utilisation Division, University of Pretoria, Pretoria, 0002, South Africa
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36
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Cambié D, Bottecchia C, Straathof NJW, Hessel V, Noël T. Applications of Continuous-Flow Photochemistry in Organic Synthesis, Material Science, and Water Treatment. Chem Rev 2016; 116:10276-341. [PMID: 26935706 DOI: 10.1021/acs.chemrev.5b00707] [Citation(s) in RCA: 875] [Impact Index Per Article: 109.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Continuous-flow photochemistry in microreactors receives a lot of attention from researchers in academia and industry as this technology provides reduced reaction times, higher selectivities, straightforward scalability, and the possibility to safely use hazardous intermediates and gaseous reactants. In this review, an up-to-date overview is given of photochemical transformations in continuous-flow reactors, including applications in organic synthesis, material science, and water treatment. In addition, the advantages of continuous-flow photochemistry are pointed out and a thorough comparison with batch processing is presented.
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Affiliation(s)
- Dario Cambié
- Department of Chemical Engineering and Chemistry, Micro Flow Chemistry and Process Technology, Eindhoven University of Technology , Den Dolech 2, 5600 MB Eindhoven, The Netherlands
| | - Cecilia Bottecchia
- Department of Chemical Engineering and Chemistry, Micro Flow Chemistry and Process Technology, Eindhoven University of Technology , Den Dolech 2, 5600 MB Eindhoven, The Netherlands
| | - Natan J W Straathof
- Department of Chemical Engineering and Chemistry, Micro Flow Chemistry and Process Technology, Eindhoven University of Technology , Den Dolech 2, 5600 MB Eindhoven, The Netherlands
| | - Volker Hessel
- Department of Chemical Engineering and Chemistry, Micro Flow Chemistry and Process Technology, Eindhoven University of Technology , Den Dolech 2, 5600 MB Eindhoven, The Netherlands
| | - Timothy Noël
- Department of Chemical Engineering and Chemistry, Micro Flow Chemistry and Process Technology, Eindhoven University of Technology , Den Dolech 2, 5600 MB Eindhoven, The Netherlands.,Department of Organic Chemistry, Ghent University , Krijgslaan 281 (S4), 9000 Ghent, Belgium
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Iguchi S, Teramura K, Hosokawa S, Tanaka T. Effect of the chloride ion as a hole scavenger on the photocatalytic conversion of CO2 in an aqueous solution over Ni–Al layered double hydroxides. Phys Chem Chem Phys 2015; 17:17995-8003. [DOI: 10.1039/c5cp02724a] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The photocatalytic conversion of CO2 to CO using a Ni–Al LDH photocatalyst in an aqueous solution of NaCl was investigated. HClO was produced as an oxidation product of Cl− under photoirradiation.
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Affiliation(s)
- Shoji Iguchi
- Department of Molecular Engineering
- Graduate School of Engineering
- Kyoto University
- Kyoto 615-8510
- Japan
| | - Kentaro Teramura
- Department of Molecular Engineering
- Graduate School of Engineering
- Kyoto University
- Kyoto 615-8510
- Japan
| | - Saburo Hosokawa
- Department of Molecular Engineering
- Graduate School of Engineering
- Kyoto University
- Kyoto 615-8510
- Japan
| | - Tsunehiro Tanaka
- Department of Molecular Engineering
- Graduate School of Engineering
- Kyoto University
- Kyoto 615-8510
- Japan
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