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Lee WC, Fang Y, Le H, Hodgson R, Chan HWB, Qian R, Alsohaimi IH, Canciani GE, Alhar MS, Chen Q. Enhanced photoelectrochemical water splitting by a 3D hierarchical sea urchin-like structure: ZnO nanorod arrays on TiO 2hollow hemisphere. NANOTECHNOLOGY 2024; 35:295301. [PMID: 38621372 DOI: 10.1088/1361-6528/ad3e88] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2024] [Accepted: 04/15/2024] [Indexed: 04/17/2024]
Abstract
A hierarchical sea urchin-like hybrid metal oxide nanostructure of ZnO nanorods deposited on TiO2porous hollow hemispheres with a thin zinc titanate interface layer is specifically designed and synthesized to form a combined type I straddling and type II staggered junctions. The HHSs, synthesized by electrospinning, facilitate light trapping and scattering. The ZnO nanorods offer a large surface area for improved surface oxidation kinetics. The interface layer of zinc titanate (ZnTiO3) between the TiO2HHSs and ZnO nanorods regulates the charge separation in a closely coupled hierarchy structure of ZnO/ZnTiO3/TiO2. The synergistic effects of the improved light trapping, charge separation, and fast surface reaction kinetics result in a superior photoconversion efficiency of 1.07% for the photoelectrochemical water splitting with an outstanding photocurrent density of 2.8 mA cm-2at 1.23 V versus RHE.
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Affiliation(s)
- Wei Cheat Lee
- Department of Chemistry, School of Life Sciences, University of Sussex, Brighton, BN1 9QJ, United Kingdom
| | - Yuanxing Fang
- Department of Chemistry, School of Life Sciences, University of Sussex, Brighton, BN1 9QJ, United Kingdom
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou 350116, People's Republic of China
| | - Huyen Le
- Department of Chemistry, School of Life Sciences, University of Sussex, Brighton, BN1 9QJ, United Kingdom
| | - Ronan Hodgson
- Department of Chemistry, School of Life Sciences, University of Sussex, Brighton, BN1 9QJ, United Kingdom
| | - Hon Wing Boaz Chan
- Department of Chemistry, School of Life Sciences, University of Sussex, Brighton, BN1 9QJ, United Kingdom
| | - Rong Qian
- National Centre for Inorganic Mass Spectrometry in Shanghai, Shanghai Institute of Ceramics, Chinese Academy of Science, Shanghai 200050, People's Republic of China
| | - Ibrahim H Alsohaimi
- Chemistry Department, College of Science, Jouf University, Sakaka, PO Box 2014, Saudi Arabia
| | - Giacomo E Canciani
- Department of Chemistry, School of Life Sciences, University of Sussex, Brighton, BN1 9QJ, United Kingdom
- Ingénieur Dans La Métrologie Des Actinides a la CETAMA (CEA), Villeneuve-lès-Avignon, Occitanie, France
| | - Munirah Sulaiman Alhar
- Department of Chemistry, School of Life Sciences, University of Sussex, Brighton, BN1 9QJ, United Kingdom
| | - Qiao Chen
- Department of Chemistry, School of Life Sciences, University of Sussex, Brighton, BN1 9QJ, United Kingdom
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2
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Samadi M, Moshfegh AZ. Recent Developments of Electrospinning-Based Photocatalysts in Degradation of Organic Pollutants: Principles and Strategies. ACS OMEGA 2022; 7:45867-45881. [PMID: 36570210 PMCID: PMC9773183 DOI: 10.1021/acsomega.2c05624] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Accepted: 11/02/2022] [Indexed: 06/17/2023]
Abstract
Electrospinning is a simple and cheap process for forming one-dimensional (1D) nanofibers with controllable size, morphology, and chemistry. Besides these, the ultrahigh surface area with industrialization capability has attracted extensive interest in the research community. On the other hand, a photocatalytic process is a promising method for degrading organic pollutants that cannot be removed by conventional wastewater treatment. This review focuses on the recent progress of electrospun nanofibers for the photocatalytic degradation of water pollutants. The linkage between the electrospinning technique and the photocatalytic process is classified into two main categories: (1) polymeric electrospun nanofibers as a sacrificed template to form 1D photocatalysts and (2) polymeric electrospun nanofibers as a carrier of photocatalyst materials. We have thoroughly discussed the principles and fundamental issues of electrospinning as well as two main strategies to design and fabricate nanofiber-based photocatalysts for the ideal photodegradation of organics pollutants. The results of data mapping using VOSviewer demonstrated the recent trend and the importance of this field among researchers and engineers. Moreover, we have elaborated on the limitations and potential benefits of the two categories of electrospinning-based photocatalyst fabrication and practical application that will open new directions for future research.
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Affiliation(s)
- Morasae Samadi
- Department
of Physical Chemistry and Nanochemistry, Faculty of Chemistry, Alzahra University, Tehran19938-93973, Iran
| | - Alireza Zaker Moshfegh
- Department
of Physics, Sharif University of Technology, Tehran11555-9161, Iran
- Institute
for Nanoscience and Nanotechnology, Sharif
University of Technology, Tehran14588-89694, Iran
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3
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Almamari MR, Ahmed NM, Holi AM, Yam FK, Kyaw HH, Almessiere MA, Al-Abri MZ. Some Distinct Attributes of ZnO Nanorods Arrays: Effects of Varying Hydrothermal Growth Time. MATERIALS (BASEL, SWITZERLAND) 2022; 15:ma15175827. [PMID: 36079209 PMCID: PMC9457266 DOI: 10.3390/ma15175827] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Revised: 08/18/2022] [Accepted: 08/19/2022] [Indexed: 06/01/2023]
Abstract
This study investigates the growth time effect on the structural, morphological, optical, and photoelectrochemical characteristics of highly oriented ZnO nanorod arrays (ZNRAs). The nanorod arrays were grown on ITO substrates using the unified sol-gel spin coating and hydrothermal techniques. ZnO nanoparticles (ZNPs) were synthesized using the sol-gel spin coating method. In contrast, the hydrothermal method was used to grow the ZnO nanorods. The hydrothermal growth time investigated was between 4 and 12 h. The synthesized ZNRAs were used as the photoanode electrodes to investigate their photoelectrochemical (PEC) electrode potency. The as-prepared ZNRAs were characterized using various analytical tools to determine their structures, morphologies, optical, and photoelectrochemical traits. EDX spectra showed the presence of uncontaminated ZnO chemical composition, and FTIR spectra displayed the various functional groups in the samples. A rod-shaped ZnO nanocrystallite with mean lengths and diameters of 300-500 nm and 40-90 nm, respectively, is depicted. HRTEM images indicated the nucleation and growth of ZNRAs with a lattice fringe spacing of 0.26 nm and a growth lattice planer orientation of [002]. The optimum ZNRAs (grown at 8 h) as photoelectrode achieved a photoconversion efficiency of 0.46% and photocurrent density of 0.63 mA/cm2, that was 17 times higher than the one shown by ZNPs with Ag/AgCl as the reference electrode. Both values were higher than those reported in the literature, indicating the prospect of these ZNRAs for photoelectrode applications.
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Affiliation(s)
- Mohammed Rashid Almamari
- Nanotechnology Research Center, Sultan Qaboos University, P.O. Box 17, Al Khoud, Muscat 123, Oman
- School of Physics, Universiti Sains Malaysia, Penang 11800, Malaysia
| | - Naser M. Ahmed
- School of Physics, Universiti Sains Malaysia, Penang 11800, Malaysia
- Research Center, The University of Mashreq, Baghdad 10021, Iraq
| | - Araa Mebdir Holi
- Department of Physics, College of Education, University of Al-Qadisiyah, Al-Diwaniyah 58002, Al-Qadisiyah, Iraq
| | - F. K. Yam
- School of Physics, Universiti Sains Malaysia, Penang 11800, Malaysia
| | - Htet Htet Kyaw
- Nanotechnology Research Center, Sultan Qaboos University, P.O. Box 17, Al Khoud, Muscat 123, Oman
| | - M. A. Almessiere
- Department of Physics, College of Science, Imam Abdulrahman Bin Faisal University, P.O. Box 1982, Dammam 31441, Saudi Arabia
- Department of Biophysics, Institute for Research & Medical Consultatuins (IRMC), Imam Abdulrahman Bin Faisal University, P.O. Box 1982, Dammam 31441, Saudi Arabia
| | - Mohammed Z. Al-Abri
- Nanotechnology Research Center, Sultan Qaboos University, P.O. Box 17, Al Khoud, Muscat 123, Oman
- Department of Petroleum and Chemical Engineering, College of Engineering, Sultan Qaboos University, P.O. Box 33, Al Khould, Muscat 123, Oman
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4
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Wu JC, Chuang YH, Liou SYH, Li Q, Hou CH. In situ engineering of highly conductive TiO 2/carbon heterostructure fibers for enhanced electrocatalytic degradation of water pollutants. JOURNAL OF HAZARDOUS MATERIALS 2022; 429:128328. [PMID: 35114455 DOI: 10.1016/j.jhazmat.2022.128328] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Revised: 12/27/2021] [Accepted: 01/19/2022] [Indexed: 06/14/2023]
Abstract
Rational design of nanocomposite electrode materials with high conductivity, activity, and mechanical strength is critical in electrocatalysis. Herein, freestanding, flexible heteronanocomposites were fabricated in situ by carbonizing electrospun fibers with TiO2 nanoparticles on the surface for electrocatalytic degradation of water pollutants. The carbonization temperature was observed as a dominant parameter affecting the characteristics of the electrodes. As the carbonization temperature increased to 1000 °C, the conductivity of the electrode was significantly enhanced due to the high degree of graphitization (ID/IG ratio 1.10) and the dominant rutile phase. Additionally, the formation of TiO2 protrusions and the C-Ti heterostructure were observed at 1000 °C, which contributed to increasing the electrocatalytic activity. When 1.5 V (vs. Ag/AgCl) was employed, electrocatalytic experiments using the electrode achieved 90% degradation of crystal violet and 10.9-87.5% for an array of micropollutants. The electrical energy-per-order (EEO) for the removal of crystal violet was 0.7 kWh/m3/order, indicative of low-energy requirement. The efficient electrocatalytic activity can be ascribed to the fast electron transfer and the strong ability to generate hydroxyl radicals. Our findings expand efforts for the design of highly conductive heteronanocomposites in a facile in situ approach, providing a promising perspective for the energy-efficient electrocatalytic degradation of water pollutants.
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Affiliation(s)
- Jhen-Cih Wu
- Graduate Institute of Environmental Engineering, National Taiwan University, No. 1, Section 4, Roosevelt Road, Taipei 10617, Taiwan
| | - Yi-Hsueh Chuang
- Institute of Environmental Engineering, National Yang Ming Chiao Tung University, 1001 University Road, East District, Hsinchu 30010, Taiwan
| | - Sofia Ya Hsuan Liou
- Department of Geosciences, National Taiwan University, No. 1, Section 4, Roosevelt Road, Taipei 10617, Taiwan; Research Center for Future Earth, National Taiwan University, No. 1, Section 4. Roosevelt Rd., Taipei 10617, Taiwan
| | - Qilin Li
- Department of Civil and Environmental Engineering, Rice University, 6100 Main Street MS 519, Houston, TX 77005, USA; Nanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatment, 6100 Main Street MS 6398, Houston, TX 77005, USA
| | - Chia-Hung Hou
- Graduate Institute of Environmental Engineering, National Taiwan University, No. 1, Section 4, Roosevelt Road, Taipei 10617, Taiwan; Research Center for Future Earth, National Taiwan University, No. 1, Section 4. Roosevelt Rd., Taipei 10617, Taiwan.
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5
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Gold Spherical and Flake Assemblies Fabrication Through Calcination of Gold Nanoparticles Incorporated Poly(acrylonitrile) Nanofibers. J CLUST SCI 2021. [DOI: 10.1007/s10876-020-01882-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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6
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Hassan A, Liaquat R, Iqbal N, Ali G, Fan X, Hu Z, Anwar M, Ahmad A. Photo-electrochemical water splitting through graphene-based ZnS composites for H2 production. J Electroanal Chem (Lausanne) 2021. [DOI: 10.1016/j.jelechem.2021.115223] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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7
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Hussain D, Raza Naqvi ST, Ashiq MN, Najam-ul-Haq M. Analytical sample preparation by electrospun solid phase microextraction sorbents. Talanta 2020; 208:120413. [DOI: 10.1016/j.talanta.2019.120413] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2019] [Revised: 09/28/2019] [Accepted: 09/30/2019] [Indexed: 12/15/2022]
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8
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Ying WB, Bae K, Ko NY, Kim SH, Ryu SG, Zhu J, Zhang R, Lee B, Lee KJ. Synthesis of poly[2-(3-butenyl)-2-oxazoline] with abundant carboxylic acid functional groups as a fiber-based sol–gel reaction supporter for catalytic applications. J IND ENG CHEM 2019. [DOI: 10.1016/j.jiec.2019.07.038] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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9
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Electrospun Nanomaterials for Energy Applications: Recent Advances. APPLIED SCIENCES-BASEL 2019. [DOI: 10.3390/app9061049] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Electrospinning is a simple, versatile, cost-effective, and scalable technique for the growth of highly porous nanofibers. These nanostructures, featured by high aspect ratio, may exhibit a large variety of different sizes, morphologies, composition, and physicochemical properties. By proper post-spinning heat treatment(s), self-standing fibrous mats can also be produced. Large surface area and high porosity make electrospun nanomaterials (both fibers and three-dimensional fiber networks) particularly suitable to numerous energy-related applications. Relevant results and recent advances achieved by their use in rechargeable lithium- and sodium-ion batteries, redox flow batteries, metal-air batteries, supercapacitors, reactors for water desalination via capacitive deionization and for hydrogen production by water splitting, as well as nanogenerators for energy harvesting, and textiles for energy saving will be presented and the future prospects for the large-scale application of electrospun nanomaterials will be discussed.
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10
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Ma Z, Song K, Wang L, Gao F, Tang B, Hou H, Yang W. WO 3/BiVO 4 Type-II Heterojunction Arrays Decorated with Oxygen-Deficient ZnO Passivation Layer: A Highly Efficient and Stable Photoanode. ACS APPLIED MATERIALS & INTERFACES 2019; 11:889-897. [PMID: 30560657 DOI: 10.1021/acsami.8b18261] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
In the present work, we report a ternary WO3/BiVO4/ZnO photoanode with boosted PEC efficiency and stability toward highly efficient water splitting. The type-II WO3/BiVO4 heterojunction arrays are firstly prepared by hydrothermal growth of WO3 nanoplate arrays onto the substrates of fluorine-doped tin oxide (FTO)-coated glass, followed by spin-coating of BiVO4 layers onto the WO3 nanoplate surfaces. After that, thin ZnO layers are further introduced onto the WO3/BiVO4 heterojunction arrays via atomic layer deposition (ALD), leading to the construction of ternary WO3/BiVO4/ZnO photoanodes. It is verified that the ZnO thin layer in the WO3/BiVO4/ZnO photoanode contains abundant oxygen vacancies, which could act as an effective passivation layer to enhance the charge separation and surface water oxidation kinetics of photogenerated carriers. The as-prepared WO3/BiVO4/ZnO photoanode produces a photocurrent of 2.96 mA cm-2 under simulated sunlight with an incident photon-to-current conversion efficiency (IPCE) of ∼72.8% at 380 nm at a potential of 1.23 V versus RHE without cocatalysts, both of which are comparable to the state-of-the-art WO3/BiVO4 counterparts. Moreover, the photocurrent of the WO3/BiVO4/ZnO photoanode shows only 9% decay after 6 h, suggesting its high photoelectrochemical (PEC) stability.
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Affiliation(s)
- Zizai Ma
- Research Institute of Surface Engineering , Taiyuan University of Technology , Taiyuan 030024 , P.R. China
- Institute of Materials , Ningbo University of Technology , Ningbo 315211 , P.R. China
| | - Kai Song
- Research Institute of Surface Engineering , Taiyuan University of Technology , Taiyuan 030024 , P.R. China
| | - Lin Wang
- Institute of Materials , Ningbo University of Technology , Ningbo 315211 , P.R. China
| | - Fengmei Gao
- Institute of Materials , Ningbo University of Technology , Ningbo 315211 , P.R. China
| | - Bin Tang
- Research Institute of Surface Engineering , Taiyuan University of Technology , Taiyuan 030024 , P.R. China
| | - Huilin Hou
- Institute of Materials , Ningbo University of Technology , Ningbo 315211 , P.R. China
| | - Weiyou Yang
- Institute of Materials , Ningbo University of Technology , Ningbo 315211 , P.R. China
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11
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Zhu SC, Fu L. Fabricating rutile nanopins on an anatase hollow sphere structure with enhanced photoactivity performance. RSC Adv 2017. [DOI: 10.1039/c7ra11910k] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
TiO2 is a promising material for the renewable energy and pollution control field.
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Affiliation(s)
- Sheng-Cai Zhu
- Center for High Pressure Science and Technology Advanced Research (HPSTAR)
- Shanghai 201203
- P. R. China
| | - Ling Fu
- Henan Key Laboratory of Ecological Security for Water Source Region of Mid-line of South-to-North Diversion Project of Henan Province
- Collaborative Innovation Center of Water Security for Water Source Region of Mid-line of South-to-North Diversion Project of Henan Province
- College of Agricultural Engineering
- Nanyang Normal University
- Nanyang 473061
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12
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Regonini D, Chen G, Leach C, Clemens F. Comparison of photoelectrochemical properties of TiO 2 Nanotubes and sol-gel. Electrochim Acta 2016. [DOI: 10.1016/j.electacta.2016.07.097] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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13
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Rezaei B, Taki M, Ensafi AA. Modulated electrical field as a new pulse method to make TiO2 film for high- performance photo-electrochemical cells and modeling of the deposition process. J Solid State Electrochem 2016. [DOI: 10.1007/s10008-016-3363-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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14
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Jafari T, Moharreri E, Amin AS, Miao R, Song W, Suib SL. Photocatalytic Water Splitting-The Untamed Dream: A Review of Recent Advances. Molecules 2016; 21:molecules21070900. [PMID: 27409596 PMCID: PMC6274578 DOI: 10.3390/molecules21070900] [Citation(s) in RCA: 184] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2016] [Revised: 06/30/2016] [Accepted: 07/05/2016] [Indexed: 01/06/2023] Open
Abstract
Photocatalytic water splitting using sunlight is a promising technology capable of providing high energy yield without pollutant byproducts. Herein, we review various aspects of this technology including chemical reactions, physiochemical conditions and photocatalyst types such as metal oxides, sulfides, nitrides, nanocomposites, and doped materials followed by recent advances in computational modeling of photoactive materials. As the best-known catalyst for photocatalytic hydrogen and oxygen evolution, TiO2 is discussed in a separate section, along with its challenges such as the wide band gap, large overpotential for hydrogen evolution, and rapid recombination of produced electron-hole pairs. Various approaches are addressed to overcome these shortcomings, such as doping with different elements, heterojunction catalysts, noble metal deposition, and surface modification. Development of a photocatalytic corrosion resistant, visible light absorbing, defect-tuned material with small particle size is the key to complete the sunlight to hydrogen cycle efficiently. Computational studies have opened new avenues to understand and predict the electronic density of states and band structure of advanced materials and could pave the way for the rational design of efficient photocatalysts for water splitting. Future directions are focused on developing innovative junction architectures, novel synthesis methods and optimizing the existing active materials to enhance charge transfer, visible light absorption, reducing the gas evolution overpotential and maintaining chemical and physical stability.
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Affiliation(s)
- Tahereh Jafari
- Institute of Materials Science, University of Connecticut, 91 North Eagleville Road, Storrs, CT 06269-3222, USA.
| | - Ehsan Moharreri
- Institute of Materials Science, University of Connecticut, 91 North Eagleville Road, Storrs, CT 06269-3222, USA.
| | - Alireza Shirazi Amin
- Department of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, CT 06269-3060, USA.
| | - Ran Miao
- Department of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, CT 06269-3060, USA.
| | - Wenqiao Song
- Department of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, CT 06269-3060, USA.
| | - Steven L Suib
- Institute of Materials Science, University of Connecticut, 91 North Eagleville Road, Storrs, CT 06269-3222, USA.
- Department of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, CT 06269-3060, USA.
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15
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Wang J, Yang G, Wang L, Yan W. Fabrication of a well-aligned TiO2 nanofibrous membrane by modified parallel electrode configuration with enhanced photocatalytic performance. RSC Adv 2016. [DOI: 10.1039/c6ra01606e] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Well-aligned TiO2 nanofibrous membranes with excellent photocatalytic activity were prepared over large areas by a modified electrospinning configuration.
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Affiliation(s)
- Jianan Wang
- Department of Environmental Science and Engineering
- State Key Laboratory of Multiphase Flow in Power Engineering
- Xi'an Jiaotong University
- Xi'an 710049
- China
| | - Guorui Yang
- Department of Environmental Science and Engineering
- State Key Laboratory of Multiphase Flow in Power Engineering
- Xi'an Jiaotong University
- Xi'an 710049
- China
| | - Ling Wang
- Department of Environmental Science and Engineering
- State Key Laboratory of Multiphase Flow in Power Engineering
- Xi'an Jiaotong University
- Xi'an 710049
- China
| | - Wei Yan
- Department of Environmental Science and Engineering
- State Key Laboratory of Multiphase Flow in Power Engineering
- Xi'an Jiaotong University
- Xi'an 710049
- China
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16
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Liu Q, Zhong LB, Zhao QB, Frear C, Zheng YM. Synthesis of Fe3O4/Polyacrylonitrile Composite Electrospun Nanofiber Mat for Effective Adsorption of Tetracycline. ACS APPLIED MATERIALS & INTERFACES 2015; 7:14573-83. [PMID: 26079116 DOI: 10.1021/acsami.5b04598] [Citation(s) in RCA: 132] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Novel Fe3O4/polyacrylonitrile (PAN) composite nanofibers (NFs) were prepared by a simple two-step process, an electrospinning and solvothermal method. Characterization by field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM) demonstrated formation of a uniform nanoparticles coating (about 20 nm in thickness) on the PAN nanofiber backbone. The coating was constructed by well-crystallized cubic phase Fe3O4 nanoparticles as examined by X-ray diffraction spectroscopy (XRD). The coating doubled the specific surface area of NFs, from 8.4 to 17.8 m2 g(-1), as confirmed by nitrogen sorption isotherm analysis. To evaluate the feasibility of Fe3O4/PAN composite NFs as a potential adsorbent for antibiotic removal, batch adsorption experiments were conducted using tetracycline (TC) as the model antibiotic molecule. The results showed that Fe3O4/PAN composite NFs were effective in removing TC with no impactful loss of Fe in the pH regime of environmental interest (5-8). The adsorption of TC onto Fe3O4/PAN composite NFs better fitted the pseudo-second-order kinetics model, and the maximum adsorption capacity calculated from Langmuir isotherm model was 257.07 mg g(-1) at pH 6. The composite NFs also exhibited good regenerability over repeated adsorption/desorption cycles. Surface complexation between TC and the composite NFs contributed most to the adsorption as elucidated by X-ray photoelectron spectroscopy (XPS). This highly effective and novel adsorbent can be easily modularized and separated, promising its huge potential in drinking and wastewater treatment for antibiotic removal.
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Affiliation(s)
- Qing Liu
- †CAS Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, 1799 Jimei Road, Xiamen 361021, China
- ‡College of Resources and Environment, University of Chinese Academy of Sciences, 19A Yuquan RoadBeijing 100049, China
| | - Lu-Bin Zhong
- †CAS Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, 1799 Jimei Road, Xiamen 361021, China
| | - Quan-Bao Zhao
- §Department of Biological Systems Engineering, Washington State University, Box 646120, Pullman, Washington 99164-6120, United States
| | - Craig Frear
- §Department of Biological Systems Engineering, Washington State University, Box 646120, Pullman, Washington 99164-6120, United States
| | - Yu-Ming Zheng
- †CAS Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, 1799 Jimei Road, Xiamen 361021, China
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17
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Hung WH, Lai SN, Lo AY. Synthesis of Strong Light Scattering Absorber of TiO₂-CMK-3/Ag for Photocatalytic Water Splitting under Visible Light Irradiation. ACS APPLIED MATERIALS & INTERFACES 2015; 7:8412-8418. [PMID: 25848834 DOI: 10.1021/am508684e] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The enhanced water splitting photocurrent has been observed through plasmonic mesoporous composite electrode TiO2-CMK-3/Ag under visible light irradiation. Strong light absorption achieved from the integrations of ordered mesoporous carbon (CMK-3) and silver plasmonic nanoparticles (NPs) layer in the TiO2, which significantly increased the effective optical depth of TiO2-CMK-3/Ag photoelectrode. The carbon-based CMK-3 also increased the surface wetting behavior and conductivity of the photoelectrodes, which resulted in a higher ion exchange rate and faster electron transport. The synthesis of high crystalline TiO2-CMK-3/Ag composite photocatalyst was verified by X-ray diffraction (XRD) and scanning electron microscopy (SEM). Pronounced enhancement of light absorption of TiO2-CMK-3/Ag photoelectrode was confirmed by UV/vis spectrophotometers. Two orders of magnitude of the enhanced water splitting photocurrent were obtained in the TiO2-CMK-3/Ag composite photoelectrode with respect to TiO2 only. Finally, spatially resolved mapping photocurrents were also demonstrated in this study.
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Affiliation(s)
- Wei Hsuan Hung
- †Department of Materials Science and Engineering, Feng-Chia University, Taichung 407, Taiwan
| | - Sz Nian Lai
- †Department of Materials Science and Engineering, Feng-Chia University, Taichung 407, Taiwan
| | - An Ya Lo
- ‡Department of Chemical and Materials Engineering, National Chin-Yi University of Technology, Taiping 411, Taiwan
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18
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Guo SY, Han S, Chi B, Pu J, Li J. A facile low-temperature approach to designing controlled amorphous-based titania composite photocatalysts with excellent noble-metal-free photocatalytic hydrogen production. ACS APPLIED MATERIALS & INTERFACES 2014; 6:4743-4751. [PMID: 24611863 DOI: 10.1021/am4054095] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
A microporous amorphous-based titania composite photocatalysts has been fabricated using a facile low-temperature (120 °C) synthetic method. Notably, we have successfully prepared the various stages of the amorphous/crystalline heterostructure by simply adjusting the pH value. The high-pH sample favors the formation of amorphous based titania composite structure. Additionally, the BET surface area of the sample increases with the increasing of the pH value, reaching a maximum of 358 m(2) g(-1) when the pH value is 12. Unexpectedly, the H2 productivity of amorphous-based composite photocatalyst without noble metal co-catalyst increases significantly with the increasing pH value, which is attributed to the quickly increasing amorphous, and the highly active catalytic centers created by the synergistic effect between crystalline TiO2 and amorphous ZnO. This study demonstrates that it is possible to improve the properties of the amorphous-based composite photocatalyst by properly modifying the synthesis conditions. The approach presented herein can be applied to the research of controlled amorphous-based composite photocatalytic systems.
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Affiliation(s)
- Si-yao Guo
- School of Materials Science and Engineering, State Key Lab of Material Processing and Die & Mould Technology, Huazhong University of Science and Technology , Wuhan 430074, China
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