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Lei R, Tang Y, Yan S, Qiu W, Guo Z, Tian X, Wang Q, Zhang K, Ju S, Yang S, Wang X. De-Pinning Fermi Level and Accelerating Surface Kinetics with an ALD Finish Boost the Fill Factor of BiVO 4 Photoanodes to 44. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2306513. [PMID: 37803425 DOI: 10.1002/smll.202306513] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Revised: 09/07/2023] [Indexed: 10/08/2023]
Abstract
With the rapid development of performance and long-term stability, bismuth vanadate (BiVO4 ) has emerged as the preferred photoanode in photoelectrochemical tandem devices. Although state-of-the-art BiVO4 photoanodes realize a saturated photocurrent density approaching the theoretical maximum, the fill factor (FF) is still inferior, pulling down the half-cell applied bias photon-to-current efficiency (HC-ABPE). Among the major fundamental limitations are the Fermi level pinning and sluggish surface kinetics at the low applied potentials. This work demonstrates that the plasma-assisted atomic layer deposition technique is capable of addressing these issues by seamlessly installing an angstrom-scale FeNi-layer between BiVO4 and electrolyte. Not only this ultrathin FeNi layer serves as an efficient OER cocatalyst, more importantly, it also effectively passivates the surface states of BiVO4 , de-pins the surface Fermi level, and enlarges the built-in voltage, allowing the photoanode to make optimal use of the photogenerated holes for achieving high FF up to 44% and HC-ABPE to 2.2%. This study offers a new approach for enhancing the FF of photoanodes and provides guidelines for designing efficient unassisted solar fuel devices.
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Affiliation(s)
- Renbo Lei
- School of Advanced Materials, Shenzhen Graduate School, Peking University, Shenzhen, 518055, China
| | - Yupu Tang
- School of Advanced Materials, Shenzhen Graduate School, Peking University, Shenzhen, 518055, China
| | - Shihan Yan
- School of Advanced Materials, Shenzhen Graduate School, Peking University, Shenzhen, 518055, China
| | - Weitao Qiu
- Guangdong Provincial Key Laboratory of Nano-Micro Materials Research, School of Chemical Biology and Biotechnology, Shenzhen Graduate School, Peking University, Shenzhen, 518055, China
| | - Zheng Guo
- School of Advanced Materials, Shenzhen Graduate School, Peking University, Shenzhen, 518055, China
| | - Xu Tian
- School of Advanced Materials, Shenzhen Graduate School, Peking University, Shenzhen, 518055, China
| | - Qian Wang
- School of Advanced Materials, Shenzhen Graduate School, Peking University, Shenzhen, 518055, China
| | - Kai Zhang
- Guangdong Provincial Key Laboratory of Nano-Micro Materials Research, School of Chemical Biology and Biotechnology, Shenzhen Graduate School, Peking University, Shenzhen, 518055, China
| | - Shanshan Ju
- School of Advanced Materials, Shenzhen Graduate School, Peking University, Shenzhen, 518055, China
| | - Shihe Yang
- Guangdong Provincial Key Laboratory of Nano-Micro Materials Research, School of Chemical Biology and Biotechnology, Shenzhen Graduate School, Peking University, Shenzhen, 518055, China
| | - Xinwei Wang
- School of Advanced Materials, Shenzhen Graduate School, Peking University, Shenzhen, 518055, China
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2
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Zhang J, Chen Y, Yang L, Peng X, Zhang KH, Yang Y. Correlation between Dynamics of Polaronic Photocarriers and Photoelectrochemical Performance in Mo-Doped Bismuth Vanadate. J Phys Chem Lett 2023; 14:11350-11358. [PMID: 38064648 DOI: 10.1021/acs.jpclett.3c03128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2023]
Abstract
Bismuth vanadate (BiVO4) has received intense research interest due to its outstanding performance for solar water splitting, and doping it with molybdenum (Mo) ions can effectively boost photoelectrochemical performance. In this material, highly localized polarons play a key role in the photoconversion process. Herein, we uncovered the influence of Mo dopants on the dynamics of polaronic transient species using transient absorption spectroscopy. We find that the preexisting electron small polarons stemming from the thermal ionization of dopants provide additional centers to capture itinerant holes, which significantly decrease the hole lifetime. However, the introduction of dopants increases the lifetime of self-trapped excitons that arise from the binding of electron polarons and holes. The dependence of the photoelectrochemical performance of BiVO4 photoelectrodes on doping levels can be well explained by combining the dopant effects on the lifetimes of delocalized and self-trapped transient species. Our findings provide guidance for rational optimization of dopant concentration to maximize the PEC efficiency.
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Affiliation(s)
- Jinzhong Zhang
- The State Key Laboratory of Physical Chemistry of Solid Surfaces, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), Department of Chemistry, College of Chemistry & Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Yihong Chen
- The State Key Laboratory of Physical Chemistry of Solid Surfaces, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), Department of Chemistry, College of Chemistry & Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Lu Yang
- The State Key Laboratory of Physical Chemistry of Solid Surfaces, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), Department of Chemistry, College of Chemistry & Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Xiaohui Peng
- The State Key Laboratory of Physical Chemistry of Solid Surfaces, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), Department of Chemistry, College of Chemistry & Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Kelvin Hl Zhang
- The State Key Laboratory of Physical Chemistry of Solid Surfaces, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), Department of Chemistry, College of Chemistry & Chemical Engineering, Xiamen University, Xiamen 361005, China
- Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM), Xiamen 361005, China
| | - Ye Yang
- The State Key Laboratory of Physical Chemistry of Solid Surfaces, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), Department of Chemistry, College of Chemistry & Chemical Engineering, Xiamen University, Xiamen 361005, China
- Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM), Xiamen 361005, China
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3
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Rahman MZ, Raziq F, Zhang H, Gascon J. Key Strategies for Enhancing H 2 Production in Transition Metal Oxide Based Photocatalysts. Angew Chem Int Ed Engl 2023; 62:e202305385. [PMID: 37530435 DOI: 10.1002/anie.202305385] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2023] [Revised: 07/31/2023] [Accepted: 07/31/2023] [Indexed: 08/03/2023]
Abstract
Transition metal oxides (TMOs) were one of the first photocatalysts used to produce hydrogen from water using solar energy. Despite the emergence of many other genres of photocatalysts over the years, TMO photocatalysts remain dominant due to their easy synthesis and unique physicochemical properties. Various strategies have been developed to enhance the photocatalytic activity of TMOs, but the solar-to-hydrogen (STH) conversion efficiency of TMO photocatalysts is still very low (<2 %), which is far below the targeted STH of 10 % for commercial viability. This article provides a comprehensive analysis of several widely used strategies, including oxygen defects control, doping, establishing interfacial junctions, and phase-facet-morphology engineering, that have been adopted to improve TMO photocatalysts. By critically evaluating these strategies and providing a roadmap for future research directions, this article serves as a valuable resource for researchers, students, and professionals seeking to develop efficient energy materials for green energy solutions.
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Affiliation(s)
- Mohammad Z Rahman
- KAUST Catalysis Center, King Abdullah University of Science and Technology, Thuwal, 23955, Saudi Arabia
| | - Fazal Raziq
- KAUST Catalysis Center, King Abdullah University of Science and Technology, Thuwal, 23955, Saudi Arabia
| | - Huabin Zhang
- KAUST Catalysis Center, King Abdullah University of Science and Technology, Thuwal, 23955, Saudi Arabia
| | - Jorge Gascon
- KAUST Catalysis Center, King Abdullah University of Science and Technology, Thuwal, 23955, Saudi Arabia
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4
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Lai J, Xiao P, Li Y, Cui S, Yang J, Lian H. Visible light and iodate/iodide mediated degradation of bisphenol A by self-assembly 3D hierarchical BiOIO 3/Bi 5O 7I Z-scheme heterojunction: Intermediates identification, radical mechanism and DFT calculation. JOURNAL OF HAZARDOUS MATERIALS 2023; 448:130908. [PMID: 36758431 DOI: 10.1016/j.jhazmat.2023.130908] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Revised: 01/20/2023] [Accepted: 01/29/2023] [Indexed: 06/18/2023]
Abstract
Broadening the light absorption and inhibiting carrier's recombination are vital to the improvement of photocatalytic performance. Herein, self-assembly 3D hierarchical microsphere BiOIO3/Bi5O7I Z-scheme heterojunction with carrier transfer channel was firstly fabricated by in-situ solvothermal method. The degradation efficiency for bisphenol A (BPA) reached 98.9 % within 60 min visible light irradiation. The enhanced photocatalytic activity was benefited from the Z-scheme system assisted by iodate/iodide (IO3-/I-) as carrier transfer channel that not only accelerated the interfacial charge separation, but also provided massive reactive centers for obtaining high redox capacity. The vulnerable sites and the degradation pathways of BPA were identified by density functional theory calculations and liquid chromatography-mass spectrometry analyses. The toxicity of BPA and its intermediates were predicted by ECOlogical Structure Activity Relationship (ECOSAR) and the results demonstrated that BPA was eventually mineralized to harmless products. The Z-scheme charge transfer mechanism was deeply elucidated based on the role of active species (·O2-, ·OH and h+), band structure and carrier separation efficiency. This study provides a promising strategy for the photoactivity enhancement of bismuth based heterojunction in environment purification.
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Affiliation(s)
- Jiahao Lai
- Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, Jiangsu Key Laboratory of Biomedical Materials, School of Chemistry and Materials Science, Jiangsu Provincial Key Laboratory of Materials Cycling and Pollution Control, Jiangsu Open Laboratory of Major Scientific Instrument and Equipment, Nanjing Normal University, 1 Wenyuan Road, Nanjing 210023, China
| | - Peng Xiao
- Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, Jiangsu Key Laboratory of Biomedical Materials, School of Chemistry and Materials Science, Jiangsu Provincial Key Laboratory of Materials Cycling and Pollution Control, Jiangsu Open Laboratory of Major Scientific Instrument and Equipment, Nanjing Normal University, 1 Wenyuan Road, Nanjing 210023, China
| | - Yafei Li
- Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, Jiangsu Key Laboratory of Biomedical Materials, School of Chemistry and Materials Science, Jiangsu Provincial Key Laboratory of Materials Cycling and Pollution Control, Jiangsu Open Laboratory of Major Scientific Instrument and Equipment, Nanjing Normal University, 1 Wenyuan Road, Nanjing 210023, China
| | - Shihai Cui
- Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, Jiangsu Key Laboratory of Biomedical Materials, School of Chemistry and Materials Science, Jiangsu Provincial Key Laboratory of Materials Cycling and Pollution Control, Jiangsu Open Laboratory of Major Scientific Instrument and Equipment, Nanjing Normal University, 1 Wenyuan Road, Nanjing 210023, China.
| | - Jing Yang
- Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, Jiangsu Key Laboratory of Biomedical Materials, School of Chemistry and Materials Science, Jiangsu Provincial Key Laboratory of Materials Cycling and Pollution Control, Jiangsu Open Laboratory of Major Scientific Instrument and Equipment, Nanjing Normal University, 1 Wenyuan Road, Nanjing 210023, China.
| | - Hongzhen Lian
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry & Chemical Engineering and Center of Materials Analysis, Nanjing University, 163 Xianlin Avenue, Nanjing 210023, China.
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5
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Sulfur tuning oxygen vacancy of Ba 2Bi 1.4Ta 0.6O 6 for boosted photocatalytic tetracycline hydrochloride degradation and hydrogen evolution. J Colloid Interface Sci 2023; 636:470-479. [PMID: 36641822 DOI: 10.1016/j.jcis.2023.01.041] [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: 10/30/2022] [Revised: 12/27/2022] [Accepted: 01/08/2023] [Indexed: 01/12/2023]
Abstract
Photocatalysis, such as solar-driven photodegradation and energy conversion, has attracted great attention, given that it provides a promising solution for alleviating the energy shortage and environmental contamination issues. However, the insufficient light absorption and charge separation/transport efficiency restrict the solar conversion efficiency. It has been proved that oxygen vacancies (Ov) can improve the photocatalytic activity by enhancing the light absorption. But in this study, we show that oxygen vacancies hinder the charge separation/transfer in Ba2Bi1.4Ta0.6O6. The incorporation of S further pushes the light absorption edge up to 1170 nm. Therefore, the S/Ov-Ba2Bi1.4Ta0.6O6 sample can absorb not only the full range of visible light but also part of near-infrared light. More importantly, it mitigates the drawback of oxygen vacancies, improving the charge separation/transport by 1.65 times. As a result, The S/Ov-Ba2Bi1.4Ta0.6O6 nanowires manifest 4.41 times and over 100 times higher photocatalytic activity for tetracycline hydrochloride degradation and hydrogen production, respectively.
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6
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Lin C, Dong C, Kim S, Lu Y, Wang Y, Yu Z, Gu Y, Gu Z, Lee DK, Zhang K, Park JH. Photo-Electrochemical Glycerol Conversion over a Mie Scattering Effect Enhanced Porous BiVO 4 Photoanode. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2209955. [PMID: 36692193 DOI: 10.1002/adma.202209955] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Revised: 01/18/2023] [Indexed: 06/17/2023]
Abstract
The photo-electrochemical (PEC) oxidation of glycerol (GLY) to high-value-added dihydroxyacetone (DHA) can be achieved over a BiVO4 photoanode, while the PEC performance of most BiVO4 photoanodes is impeded due to the upper limits of the photocurrent density. Here, an enhanced Mie scattering effect of the well-documented porous BiVO4 photoanode is obtained with less effort by a simple annealing process, which significantly reduces the reflectivity to near zero. The great light absorbability increases the basic photocurrent density by 1.77 times. The selective oxidation of GLY over the BiVO4 photoanode results in a photocurrent density of 6.04 mA cm-2 and a DHA production rate of 325.2 mmol m-2 h-1 that exceeds all reported values. This work addresses the poor ability of nanostructured BiVO4 to harvest light, paving the way for further improvements in charge transport and transfer to realize highly efficient PEC conversion.
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Affiliation(s)
- Cheng Lin
- School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing, 210094, P. R. China
| | - Chaoran Dong
- School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing, 210094, P. R. China
| | - Sungsoon Kim
- Department of Chemical and Biomolecular Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 120-749, Republic of Korea
| | - Yuan Lu
- Department of Chemical and Biomolecular Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 120-749, Republic of Korea
| | - Yulan Wang
- College of Chemistry, State Key Laboratory of Photocatalysis on Energy and Environment, Fuzhou University, Fujian, 350108, P. R. China
| | - Zhiyang Yu
- College of Chemistry, State Key Laboratory of Photocatalysis on Energy and Environment, Fuzhou University, Fujian, 350108, P. R. China
| | - Yu Gu
- School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing, 210094, P. R. China
| | - Zhiyuan Gu
- College of Physics and Optoelectronics, Taiyuan University of Technology, Taiyuan, 030024, P. R. China
| | - Dong Ki Lee
- Department of Chemical and Biomolecular Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 120-749, Republic of Korea
- Department of Chemical and Biomolecular Engineering, Yonsei-KIST Convergence Research Institute, Yonsei University, Seoul, 03722, Republic of Korea
- Clean Energy Research Center (KIST) and Division of Energy and Environment Technology, KIST School, University of Science and Technology, Seoul, 02792, Republic of Korea
- Graduate School of Energy and Environment, Korea University, Seoul, 02841, Republic of Korea
| | - Kan Zhang
- School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing, 210094, P. R. China
| | - Jong Hyeok Park
- Department of Chemical and Biomolecular Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 120-749, Republic of Korea
- Department of Chemical and Biomolecular Engineering, Yonsei-KIST Convergence Research Institute, Yonsei University, Seoul, 03722, Republic of Korea
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7
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Zhang Y, Liu Y, Zhang T, Gong X, Wang Z, Liu Y, Wang P, Cheng H, Dai Y, Huang B, Zheng Z. In Situ Monitoring of the Spatial Distribution of Oxygen Vacancies and Enhanced Photocatalytic Performance at the Single-Particle Level. NANO LETTERS 2023; 23:1244-1251. [PMID: 36757119 DOI: 10.1021/acs.nanolett.2c04313] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Oxygen vacancies (OVs) on specific sites/facets can strengthen the interaction between reactants and oxide surfaces, facilitating interfacial charge transfer. However, precise monitoring of the spatial distribution of OVs remains a grand challenge. We report here that a single-particle spectroscopy technique addresses this challenge by establishing a positive correlation relationship between defects and bound exciton luminescence across different facets. Taking monoclinic BiVO4 as an example, on the basis of theoretical guidance, by in situ tracking the PL lifetimes and PL spectra of different facets on single particles before and after hydrogen treatment, we provide evidence that the PL emission originates from the OV state and determine that OVs is more inclined to be generated at the {010} facets. This anisotropic defect engineering significantly prolongs the lifetime of carriers and accelerates the activation of molecular oxygen. These findings not only verify preference rules of OVs in metal oxides but also provide a time-space-resolved monitoring method.
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Affiliation(s)
- Yujia Zhang
- State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, People's Republic of China
| | - Yan Liu
- Center for Optics Research and Engineering, Shandong University, Qingdao, 266237, People's Republic of Chin
| | - Ting Zhang
- School of Physics, Shandong University, Jinan 250100, People's Republic of China
| | - Xueqin Gong
- State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, People's Republic of China
| | - Zeyan Wang
- State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, People's Republic of China
| | - Yuanyuan Liu
- State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, People's Republic of China
| | - Peng Wang
- State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, People's Republic of China
| | - Hefeng Cheng
- State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, People's Republic of China
| | - Ying Dai
- School of Physics, Shandong University, Jinan 250100, People's Republic of China
| | - Baibiao Huang
- State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, People's Republic of China
| | - Zhaoke Zheng
- State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, People's Republic of China
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8
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Xu F, Pan Z, Weng B. Sulfur-Induced Vacancies in Ba 2Bi 1.4Nb 0.6O 6 Promoting Photocatalytic Tetracycline Hydrochloride Degradation. Inorg Chem 2022; 61:20878-20885. [PMID: 36516860 DOI: 10.1021/acs.inorgchem.2c03274] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Solar-driven photodegradation has attracted great attention, given that it provides a promising solution for eliminating antibiotics in aqueous environments, due to its environmental friendliness and economic feasibility. However, solar conversion efficiencies are restricted by insufficient sunlight absorption and ineffective charge separation/transfer. Herein, the incorporation of sulfur into Ba2Bi1.4Nb0.6O6 nanorods brings about O and S vacancies, leading to significantly enhanced light absorption and charge separation/transport efficiency by almost 4 times. As a result, the obtained material exhibits greatly improved photocatalytic degradation efficiency for tetracycline hydrochloride under visible light irradiation with outstanding stability. The photocatalytic degradation efficiency is highest among the state-of-the-art photocatalysts for tetracycline hydrochloride degradation. This work paves a promising pathway to develop highly efficient photocatalysts with a narrow band gap.
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Affiliation(s)
- Fenghua Xu
- Department of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan Province 410083, China
| | - Zhipeng Pan
- Guizhou Meling Power sources Co., Ltd., Zunyi, Guizhou Province 563000, China
| | - Baicheng Weng
- Department of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan Province 410083, China
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9
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Yang Z, Yuan M, Liu B, Zhang W, Maleki A, Guo B, Ma P, Cheng Z, Lin J. Conferring BiVO
4
Nanorods with Oxygen Vacancies to Realize Enhanced Sonodynamic Cancer Therapy. Angew Chem Int Ed Engl 2022; 61:e202209484. [DOI: 10.1002/anie.202209484] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Indexed: 11/06/2022]
Affiliation(s)
- Zhuang Yang
- State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied Chemistry Changchun 130022 P. R. China
- School of Applied Chemistry and Engineering University of Science and Technology of China Hefei 230026 P. R. China
| | - Meng Yuan
- State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied Chemistry Changchun 130022 P. R. China
- School of Applied Chemistry and Engineering University of Science and Technology of China Hefei 230026 P. R. China
| | - Bin Liu
- State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied Chemistry Changchun 130022 P. R. China
| | - Wenying Zhang
- State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied Chemistry Changchun 130022 P. R. China
- School of Applied Chemistry and Engineering University of Science and Technology of China Hefei 230026 P. R. China
| | - Aziz Maleki
- Zanjan Pharmaceutical Nanotechnology Research Center (ZPNRC), and Department of Pharmaceutical Nanotechnology School of Pharmacy Zanjan University of Medical Sciences Zanjan 45139-56184 Iran
| | - Baolin Guo
- State Key Laboratory for Mechanical Behavior of Materials, and Frontier Institute of Science and Technology, and Key Laboratory of Shaanxi Province for Craniofacial Precision Medicine Research College of Stomatology Xi'an Jiaotong University Xi'an 710049 P. R. China
| | - Ping'an Ma
- State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied Chemistry Changchun 130022 P. R. China
- School of Applied Chemistry and Engineering University of Science and Technology of China Hefei 230026 P. R. China
| | - Ziyong Cheng
- State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied Chemistry Changchun 130022 P. R. China
- School of Applied Chemistry and Engineering University of Science and Technology of China Hefei 230026 P. R. China
- Guangdong Provincial Key Laboratory of Research and Development of Natural Drugs School of Pharmacy Guangdong Medical University Guangdong Medical University Key Laboratory of Research and Development of New Medical Materials Dongguan 523808 P. R. China
| | - Jun Lin
- State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied Chemistry Changchun 130022 P. R. China
- School of Applied Chemistry and Engineering University of Science and Technology of China Hefei 230026 P. R. China
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10
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Yang Z, Yuan M, Liu B, Zhang W, Maleki A, Guo B, Ma P, Cheng Z, Lin J. Conferring BiVO4 Nanorods with Oxygen Vacancies to Realize Enhanced Sonodynamic Cancer Therapy. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202209484] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Zhuang Yang
- Changchun Institute of Applied Chemistry Chinese Academy of Sciences: Chang Chun Institute of Applied Chemistry Chinese Academy of Sciences State Key Laboratory of Rare Earth Resource Utilization CHINA
| | - Meng Yuan
- Changchun Institute of Applied Chemistry Chinese Academy of Sciences: Chang Chun Institute of Applied Chemistry Chinese Academy of Sciences State Key Laboratory of Rare Earth Resource Utilization CHINA
| | - Bin Liu
- Changchun Institute of Applied Chemistry Chinese Academy of Sciences: Chang Chun Institute of Applied Chemistry Chinese Academy of Sciences State Key Laboratory of Rare Earth Resource Utilization CHINA
| | - Wenying Zhang
- Chang Chun Institute of Applied Chemistry: Chang Chun Institute of Applied Chemistry Chinese Academy of Sciences State Key Laboratory of Rare Earth Resource Utilization CHINA
| | - Aziz Maleki
- Zanjan University of Medical Sciences Zanjan Pharmaceutical Nanotechnology Research Center (ZPNRC) CHINA
| | - Baolin Guo
- Xi'an Jiaotong University State Key Laboratory for Mechanical Behavior of Materials CHINA
| | - Ping’an Ma
- Changchun Institute of Applied Chemistry Chinese Academy of Sciences: Chang Chun Institute of Applied Chemistry Chinese Academy of Sciences State Key Laboratory of Rare Earth Resource Utilization CHINA
| | - Ziyong Cheng
- Changchun Institute of Applied Chemistry Chinese Academy of Sciences: Chang Chun Institute of Applied Chemistry Chinese Academy of Sciences State Key Laboratory of Rare Earth Resource Utilization CHINA
| | - Jun Lin
- Changchun Institute of Applied Chemistry Chinese Academy of Sciences: Chang Chun Institute of Applied Chemistry Chinese Academy of Sciences Lab Rare Earth Chem Phys 5625 Remin Street 130022 Changchun CHINA
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11
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Sun Q, Ren K, Qi L. Boosting the Performance of BiVO 4 Photoanodes by the Simultaneous Introduction of Oxygen Vacancies and Cocatalyst via Photoelectrodeposition. ACS APPLIED MATERIALS & INTERFACES 2022; 14:37833-37842. [PMID: 35957577 DOI: 10.1021/acsami.2c10741] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Photoelectrochemical (PEC) water splitting is a promising way to convert solar energy into hydrogen energy, but the efficiency is limited by severe charge recombination especially in photoanodes. Herein, to reduce the charge recombination in the bulk phase and at the surface of the BiVO4 photoanodes, oxygen vacancy introduction and cocatalyst loading were realized simultaneously by one-step photocathode deposition. A unique re-BiVO4/FeOOH photoanode was obtained by the photocathodic reduction of BiVO4 in an electrolyte containing Fe3+, where the oxygen vacancies were introduced during the reduction process and the deposition of the FeOOH cocatalyst on the surface was induced by the generated OH-. When used for PEC water oxidation, the obtained re-BiVO4/FeOOH photoanode achieved an excellent PEC performance with a photocurrent density of 5.35 mA/cm2 at 1.23 V versus RHE under AM 1.5G illumination, which was considerably higher than those for the pristine BiVO4 photoanode (2.88 mA/cm2) and the re-BiVO4 photoanode obtained by photocathodic reduction without Fe3+ (4.32 mA/cm2). After further modification with a cobalt silicate (Co-Sil) cocatalyst, the resultant re-BiVO4/FeOOH/Co-Sil photoanode exhibited a photocurrent density as high as 6.10 mA/cm2 at 1.23 V versus RHE and a remarkable applied bias photon-to-current efficiency of 2.25%. The outstanding performance of the re-BiVO4/FeOOH/Co-Sil photoanode could be attributed to the coexistence of plenty of oxygen vacancies in BiVO4 reducing recombination of photogenerated carriers, the FeOOH cocatalyst interlayer as a hole-transport layer, and the outer Co-Sil cocatalyst with a high activity toward oxygen evolution. This work may open a new avenue toward multifunctional modifications of photoanode systems for efficient solar conversion.
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Affiliation(s)
- Qi Sun
- Beijing National Laboratory for Molecular Sciences, College of Chemistry, Peking University, Beijing 100871, China
| | - Kexin Ren
- Beijing National Laboratory for Molecular Sciences, College of Chemistry, Peking University, Beijing 100871, China
| | - Limin Qi
- Beijing National Laboratory for Molecular Sciences, College of Chemistry, Peking University, Beijing 100871, China
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12
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Zhou X, Zhang J, Wang X, Tan T, Fang R, Chen S, Dong F. Efficient NO removal and photocatalysis mechanism over Bi-metal@Bi 2O 2[BO 2(OH)] with oxygen vacancies. JOURNAL OF HAZARDOUS MATERIALS 2022; 436:129271. [PMID: 35739786 DOI: 10.1016/j.jhazmat.2022.129271] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2022] [Revised: 05/20/2022] [Accepted: 05/30/2022] [Indexed: 06/15/2023]
Abstract
Photocatalysis technology prevails as a feasible option for air pollution control, in which high-efficiency charge separation and effective pollutant activation are the crucial issues. Here, this work designed Bi-metal@ Bi2O2[BO2(OH)] with oxygen vacancies (OVs) catalyst for photocatalytic oxidation of NO under visible light, to shed light on the above two processes. Experimental characterizations and density functional theory (DFT) calculations reveal that a unique electron transfer covalent loop([Bi2O2]2+ → Bi-metal → O2-)can be formed during the reaction to guide the directional transfer of carriers, significantly improving the charge separation efficiency and the yield of active oxygen species. Simultaneously, the defect levels served by OVs also play a part. During the NO purification process, in-situ DRIFTS assisted with DFT calculations reveal that Bi metals could be functioned as electron donors to activate NO molecules and form NO-, a key intermediate. This induces a new reaction path of NO → NO- → NO3- to achieve the harmless conversion of NO, effectively restraining the generation of noxious intermediates (NO2, N2O4). It is expected that this study would inspire the design of more artful photocatalysts for effective charge transfer and safe pollutants purification.
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Affiliation(s)
- Xi Zhou
- College of Environment and Resources, Chongqing Key Laboratory of Catalysis and New Environmental Materials, Chongqing Technology and Business University, Chongqing 400067, China
| | - Jin Zhang
- College of Environment and Resources, Chongqing Key Laboratory of Catalysis and New Environmental Materials, Chongqing Technology and Business University, Chongqing 400067, China
| | - Xuemei Wang
- College of Environment and Resources, Chongqing Key Laboratory of Catalysis and New Environmental Materials, Chongqing Technology and Business University, Chongqing 400067, China
| | - Tianqi Tan
- College of Environment and Resources, Chongqing Key Laboratory of Catalysis and New Environmental Materials, Chongqing Technology and Business University, Chongqing 400067, China
| | - Ruimei Fang
- College of Environment and Resources, Chongqing Key Laboratory of Catalysis and New Environmental Materials, Chongqing Technology and Business University, Chongqing 400067, China
| | - Si Chen
- Yangtze Delta Region Institute (Huzhou), University of Electronic Science and Technology of China, Huzhou 313000, China.
| | - Fan Dong
- College of Environment and Resources, Chongqing Key Laboratory of Catalysis and New Environmental Materials, Chongqing Technology and Business University, Chongqing 400067, China; Yangtze Delta Region Institute (Huzhou), University of Electronic Science and Technology of China, Huzhou 313000, China; State Centre for International Cooperation on Designer Low Carbon and Environmental Materials (CDLCEM), School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, China.
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13
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Ye KH, Tang T, Liang Z, Ji H, Lin Z, Yang S. Recent progress of bismuth vanadate-based photoelectrocatalytic water splitting. CHINESE SCIENCE BULLETIN-CHINESE 2022. [DOI: 10.1360/tb-2021-0238] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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14
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Cheng C, Fang Q, Fernandez-Alberti S, Long R. Depleted Oxygen Defect State Enhancing Tungsten Trioxide Photocatalysis: A Quantum Dynamics Perspective. J Phys Chem Lett 2022; 13:5571-5580. [PMID: 35696649 DOI: 10.1021/acs.jpclett.2c01541] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Oxygen vacancies generally create midgap states in transition metal oxides, which are expected to decrease the photoelectrochemical water-splitting efficiency. Recent experiments defy this expectation but leave the mechanism unclear. Focusing on the photoanode WO3 as a prototypical system, we demonstrate using nonadiabatic molecular dynamics that an oxygen vacancy suppresses nonradiative electron-hole recombination, because the defect acts as an electron reservoir instead of a recombination center. The occupied midgap electrons prefer to be populated a priori compared to the band edge transition because of a larger transition dipole moment, converting to depleted/unoccupied trap states that rapidly accept conduction band electrons and then cause trap-assisted recombination by impeding the bandgap recombination regardless of oxygen vacancy configurations. The reported results provide a fundamental understanding of the "realistic" role of the oxygen vacancies and their influence on charge-phonon dynamics and carrier lifetime. The study generates valuable insights into the design of high-performance transition metal oxide photocatalysts.
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Affiliation(s)
- Cheng Cheng
- College of Chemistry, Key Laboratory of Theoretical & Computational Photochemistry of Ministry of Education, Beijing Normal University, Beijing 100875, China
| | - Qiu Fang
- College of Chemistry, Key Laboratory of Theoretical & Computational Photochemistry of Ministry of Education, Beijing Normal University, Beijing 100875, China
| | - S Fernandez-Alberti
- Departamento de Cienciay Tecnologia, Universidad Nacional de Quilmes/CONICET, B1876BXD Bernal, Argentina
| | - Run Long
- College of Chemistry, Key Laboratory of Theoretical & Computational Photochemistry of Ministry of Education, Beijing Normal University, Beijing 100875, China
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15
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Wang Q, Wu L, Zhang Z, Cheng J, Chen R, Liu Y, Luo J. Elucidating the Role of Hypophosphite Treatment in Enhancing the Performance of BiVO 4 Photoanode for Photoelectrochemical Water Oxidation. ACS APPLIED MATERIALS & INTERFACES 2022; 14:26642-26652. [PMID: 35640048 DOI: 10.1021/acsami.2c02790] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Slow water oxidation kinetics and poor charge transport restrict the development of efficient BiVO4 photoanodes for photoelectrochemical (PEC) water splitting. Oxygen vacancy as an effective strategy can significantly enhance charge transport and improve conductivity in semiconductor photoanodes. Herein, we obtained BiVO4 photoanodes with appropriate oxygen vacancy by treating them with hypophosphite, which significantly improved the PEC performance. The synthesized photoanode exhibits a remarkable photocurrent density of 3.37 mA/cm2 at 1.23 V vs reversible hydrogen electrode with excellent stability. Interestingly, the performance improvement mainly originates from the oxygen vacancy rather than P doping. Our study provides insights in understanding the role of oxygen vacancy in PEC water splitting and strategies for designing more efficient photoelectrodes.
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Affiliation(s)
- Qingjie Wang
- Institute of Photoelectronic Thin Film Devices and Technology, Solar Energy Research Center, Key Laboratory of Photoelectronic Thin Film Devices and Technology of Tianjin, Ministry of Education Engineering Research Center of Thin Film Photoelectronic Technology, Renewable Energy Conversion and Storage Center, Nankai University, Tianjin 300350, China
| | - Linxiao Wu
- Institute of Photoelectronic Thin Film Devices and Technology, Solar Energy Research Center, Key Laboratory of Photoelectronic Thin Film Devices and Technology of Tianjin, Ministry of Education Engineering Research Center of Thin Film Photoelectronic Technology, Renewable Energy Conversion and Storage Center, Nankai University, Tianjin 300350, China
| | - Zhuang Zhang
- Institute of Photoelectronic Thin Film Devices and Technology, Solar Energy Research Center, Key Laboratory of Photoelectronic Thin Film Devices and Technology of Tianjin, Ministry of Education Engineering Research Center of Thin Film Photoelectronic Technology, Renewable Energy Conversion and Storage Center, Nankai University, Tianjin 300350, China
| | - Jinshui Cheng
- Institute of Photoelectronic Thin Film Devices and Technology, Solar Energy Research Center, Key Laboratory of Photoelectronic Thin Film Devices and Technology of Tianjin, Ministry of Education Engineering Research Center of Thin Film Photoelectronic Technology, Renewable Energy Conversion and Storage Center, Nankai University, Tianjin 300350, China
| | - Rong Chen
- Institute of Photoelectronic Thin Film Devices and Technology, Solar Energy Research Center, Key Laboratory of Photoelectronic Thin Film Devices and Technology of Tianjin, Ministry of Education Engineering Research Center of Thin Film Photoelectronic Technology, Renewable Energy Conversion and Storage Center, Nankai University, Tianjin 300350, China
| | - Yang Liu
- College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China
| | - Jingshan Luo
- Institute of Photoelectronic Thin Film Devices and Technology, Solar Energy Research Center, Key Laboratory of Photoelectronic Thin Film Devices and Technology of Tianjin, Ministry of Education Engineering Research Center of Thin Film Photoelectronic Technology, Renewable Energy Conversion and Storage Center, Nankai University, Tianjin 300350, China
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16
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Li S, Xu W, Meng L, Tian W, Li L. Recent Progress on Semiconductor Heterojunction‐Based Photoanodes for Photoelectrochemical Water Splitting. SMALL SCIENCE 2022. [DOI: 10.1002/smsc.202100112] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Affiliation(s)
- Shengnan Li
- School of Physical Science and Technology Jiangsu Key Laboratory of Thin Films Center for Energy Conversion Materials & Physics (CECMP) Soochow University Suzhou 215006 P. R. China
| | - Weiwei Xu
- School of Physical Science and Technology Jiangsu Key Laboratory of Thin Films Center for Energy Conversion Materials & Physics (CECMP) Soochow University Suzhou 215006 P. R. China
| | - Linxing Meng
- School of Physical Science and Technology Jiangsu Key Laboratory of Thin Films Center for Energy Conversion Materials & Physics (CECMP) Soochow University Suzhou 215006 P. R. China
| | - Wei Tian
- School of Physical Science and Technology Jiangsu Key Laboratory of Thin Films Center for Energy Conversion Materials & Physics (CECMP) Soochow University Suzhou 215006 P. R. China
| | - Liang Li
- School of Physical Science and Technology Jiangsu Key Laboratory of Thin Films Center for Energy Conversion Materials & Physics (CECMP) Soochow University Suzhou 215006 P. R. China
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17
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Lu Y, Yang Y, Fan X, Li Y, Zhou D, Cai B, Wang L, Fan K, Zhang K. Boosting Charge Transport in BiVO 4 Photoanode for Solar Water Oxidation. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2022; 34:e2108178. [PMID: 34902189 DOI: 10.1002/adma.202108178] [Citation(s) in RCA: 50] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Revised: 12/08/2021] [Indexed: 06/14/2023]
Abstract
The ability to regulate charge separation is pivotal for obtaining high efficiency of any photoelectrode used for solar fuel production. Vacancy engineering for metal oxide semiconductor photoelectrode is a major strategy but has faced a formidable challenge in bulk charge transport because of the elusive charge self-trapping site. In this work, a new deep eutectic solvent to engineer bismuth vacancies (Bivac ) of BiVO4 photoanode is reported; the novel Bivac can remarkably increase the charge diffusion coefficient by 5.8 times (from 1.82 × 10-7 to 1.06 × 10-6 cm2 s-1 ), which boosts the charge transport efficiency. Through further loading CoBi cocatalyst to enhance charge transfer efficiency, the photocurrent density of BiVO4 photoanode with optimal Bivac concentration reaches 4.5 mA cm-2 at 1.23 V vs reversible hydrogen electrode under AM 1.5 G illumination, which is higher than that of previously reported Ovac engineered BiVO4 photoanode where the BiVO4 photoanode is synthesized by a similar procedure. This work perfects a cation defect engineering that enables the potential capability to equate the charge transport properties in different types of semiconductor materials for solar fuel conversion.
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Affiliation(s)
- Yuan Lu
- MIIT Key Laboratory of Advanced Display Material and Devices, College of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China
| | - Yilong Yang
- MIIT Key Laboratory of Advanced Display Material and Devices, College of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China
| | - Xinyi Fan
- MIIT Key Laboratory of Advanced Display Material and Devices, College of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China
| | - Yiqun Li
- MIIT Key Laboratory of Advanced Display Material and Devices, College of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China
| | - Dinghua Zhou
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian, 116024, China
| | - Bo Cai
- MIIT Key Laboratory of Advanced Display Material and Devices, College of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China
| | - Luyang Wang
- College of New Materials and New Energies, Shenzhen Technology University, Shenzhen, Guangdong, 518118, P. R. China
| | - Ke Fan
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian, 116024, China
| | - Kan Zhang
- MIIT Key Laboratory of Advanced Display Material and Devices, College of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China
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18
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Cheng C, Long R. Charge-Compensated Doping Extends Carrier Lifetimes in SrTiO 3 by Passivating Oxygen Vacancy Defects. J Phys Chem Lett 2021; 12:12040-12047. [PMID: 34904842 DOI: 10.1021/acs.jpclett.1c03775] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Experiments reported that oxygen vacancies shorten the charge carrier lifetime of SrTiO3 but that it is greatly improved upon Al and Na doping. Using nonadiabatic (NA) molecular dynamics, we demonstrate that the in-gap hole trap state created by an oxygen vacancy can be eliminated by charge-compensated doping when two Ti4+ ions or two Sr2+ ions are equally replaced by Al3+ or Na+ ions. Nevertheless, Al3+ and Na+ reduce the strength of NA coupling to a different extent, resulting in increased charge carrier lifetimes of 4.6 and 1.3 ns. The lifetimes are several times longer than that of the pristine system and 3 orders of magnitude longer than that of defective SrTiO3, which is within 50 ps due to strong NA coupling. The weakly correlated electron and hole wave functions in doped systems accelerate decoherence, further delaying charge recombination. Our study rationalizes the complex charge-phonon dynamics in SrTiO3 and proposes charge-compensated doping for the design of advanced visible-light photocatalysts.
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Affiliation(s)
- Cheng Cheng
- College of Chemistry, Key Laboratory of Theoretical & Computational Photochemistry of Ministry of Education, Beijing Normal University, Beijing 100875, People's Republic of China
| | - Run Long
- College of Chemistry, Key Laboratory of Theoretical & Computational Photochemistry of Ministry of Education, Beijing Normal University, Beijing 100875, People's Republic of China
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19
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Pan J, Ma X, Zhang W, Hu J. Enhancing the photocatalytic hydrogen production activity of BiVO 4 [110] facets using oxygen vacancies. RSC Adv 2021; 12:540-545. [PMID: 35424485 PMCID: PMC8978636 DOI: 10.1039/d1ra07121a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2021] [Accepted: 12/09/2021] [Indexed: 11/21/2022] Open
Abstract
The activity of the hydrogen evolution reaction (HER) during photoelectrochemical (PEC) water-splitting is limited when using BiVO4 with an exposed [110] facet because the conduction band minimum is below the H+/H2O potential. Here, we enhance the photocatalytic hydrogen production activity through introducing an oxygen vacancy. Our first-principles calculations show that the oxygen vacancy can tune the band edge positions of the [110] facet, originating from an induced internal electric field related to geometry distortion and charge rearrangement. Furthermore, the induced electric field favors photogenerated electron-hole separation and the enhancement of atomic activity. More importantly, oxygen-vacancy-induced electronic states can increase the probability of photogenerated electron transitions, thus improving optical absorption. This study indicates that oxygen-defect engineering is an effective method for improving the photocatalytic activity when using PEC technology.
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Affiliation(s)
- Jing Pan
- College of Physics Science and Technology, Yangzhou University Yangzhou 225002 China
| | - Xiaoxue Ma
- College of Physics Science and Technology, Yangzhou University Yangzhou 225002 China
| | - Wannian Zhang
- College of Physics Science and Technology, Yangzhou University Yangzhou 225002 China
| | - Jingguo Hu
- College of Physics Science and Technology, Yangzhou University Yangzhou 225002 China
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20
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Wang S, Wang X, Liu B, Guo Z, Ostrikov KK, Wang L, Huang W. Vacancy defect engineering of BiVO 4 photoanodes for photoelectrochemical water splitting. NANOSCALE 2021; 13:17989-18009. [PMID: 34726221 DOI: 10.1039/d1nr05691c] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Photoelectrochemical (PEC) water splitting has been regarded as a promising technology for sustainable hydrogen production. The development of efficient photoelectrode materials is the key to improve the solar-to-hydrogen (STH) conversion efficiency towards practical application. Bismuth vanadate (BiVO4) is one of the most promising photoanode materials with the advantages of visible light absorption, good chemical stability, nontoxic feature, and low cost. However, the PEC performance of BiVO4 photoanodes is limited by the relatively short hole diffusion length and poor electron transport properties. The recent rapid development of vacancy defect engineering has significantly improved the PEC performance of BiVO4. In this review article, the fundamental properties of BiVO4 are presented, followed by an overview of the methods for creating different kinds of vacancy defects in BiVO4 photoanodes. Then, the roles of vacancy defects in tuning the electronic structure, promoting charge separation, and increasing surface photoreaction kinetics of BiVO4 photoanodes are critically discussed. Finally, the major challenges and some encouraging perspectives for future research on vacancy defect engineering of BiVO4 photoanodes are presented, providing guidelines for the design of efficient BiVO4 photoanodes for solar fuel production.
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Affiliation(s)
- Songcan Wang
- Frontiers Science Center for Flexible Electronics, Xi'an Institute of Flexible Electronics (IFE) and Xi'an Institute of Biomedical Materials & Engineering, Northwestern Polytechnical University, 127 West Youyi Road, Xi'an 710072, China.
| | - Xin Wang
- Frontiers Science Center for Flexible Electronics, Xi'an Institute of Flexible Electronics (IFE) and Xi'an Institute of Biomedical Materials & Engineering, Northwestern Polytechnical University, 127 West Youyi Road, Xi'an 710072, China.
| | - Boyan Liu
- Frontiers Science Center for Flexible Electronics, Xi'an Institute of Flexible Electronics (IFE) and Xi'an Institute of Biomedical Materials & Engineering, Northwestern Polytechnical University, 127 West Youyi Road, Xi'an 710072, China.
| | - Zhaochen Guo
- Frontiers Science Center for Flexible Electronics, Xi'an Institute of Flexible Electronics (IFE) and Xi'an Institute of Biomedical Materials & Engineering, Northwestern Polytechnical University, 127 West Youyi Road, Xi'an 710072, China.
| | - Kostya Ken Ostrikov
- School of Chemistry and Physics and Centre for Materials Science Queensland University of Technology Brisbane, QLD 4000, Australia
| | - Lianzhou Wang
- Nanomaterials Centre, Australian Institute for Bioengineering and Nanotechnology and School of Chemical Engineering, The University of Queensland, Brisbane, Queensland 4072, Australia.
| | - Wei Huang
- Frontiers Science Center for Flexible Electronics, Xi'an Institute of Flexible Electronics (IFE) and Xi'an Institute of Biomedical Materials & Engineering, Northwestern Polytechnical University, 127 West Youyi Road, Xi'an 710072, China.
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21
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Wen X, Fan M, Zhao Q, Li J, Liu G. Boosting the Photoactivity of BiVO 4 Photoanodes by a ZnCoFe-LDH Thin Layer for Water Oxidation. Chem Asian J 2021; 16:4095-4102. [PMID: 34687500 DOI: 10.1002/asia.202100995] [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: 08/25/2021] [Revised: 10/03/2021] [Indexed: 11/08/2022]
Abstract
Monoclinic bismuth vanadate (BiVO4 ) has been used as an efficient photoanode material for photoelectrochemical water oxidation owing to its suitable band gap and nontoxicity. Nevertheless, the practical application of BiVO4 photoanode has been severely limited by the surface charge recombination and sluggish kinetic, which leads to the obtained photoactivity of BiVO4 is much lower than its theoretical value. In this case, ZnCoFe-LDH thin layer is conformally decorated on the porous BiVO4 photoanode through a simple electrodeposition process. The results show that a boosted photoactivity and a remarkably enhanced photocurrent density (3.43 mA cm-2 at 1.23 VRHE ) are attained for BiVO4 /ZnCoFe-LDH. In addition, the optimized BiVO4 /ZnCoFe-LDH photoanode exhibits significant negative shift in the onset potential (0.51 VRHE to 0.21 VRHE ), promotes charge separation efficiency (49.3% to 60.4% in the bulk, 29.6% to 61.9% on the surface at 1.23 VRHE ) and enhanced IPCE efficiency (25.5% to 54.7% at 425 nm) compared with that of bare BiVO4 photoanode. It is demonstrated that the boosted photoactivity of BiVO4 /ZnCoFe-LDH photoanode is mainly ascribed to the synergy effects of the formation of p-n heterojunction between ZnCoFe-LDH and BiVO4 to accelerate the photogenerated charge transfer and separation, broaden light absorption, as well as promote the surface water oxidation kinetics.
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Affiliation(s)
- Xiaojiang Wen
- Shanxi Key Laboratory of Gas Energy Efficient and Clean Utilization, College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan, Shanxi 030024, P. R. China
| | - Mengmeng Fan
- Shanxi Key Laboratory of Gas Energy Efficient and Clean Utilization, College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan, Shanxi 030024, P. R. China
| | - Qiang Zhao
- Shanxi Key Laboratory of Gas Energy Efficient and Clean Utilization, College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan, Shanxi 030024, P. R. China
| | - Jinping Li
- Shanxi Key Laboratory of Gas Energy Efficient and Clean Utilization, College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan, Shanxi 030024, P. R. China
| | - Guang Liu
- Shanxi Key Laboratory of Gas Energy Efficient and Clean Utilization, College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan, Shanxi 030024, P. R. China
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22
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Nikačević P, Hegner FS, Galán-Mascarós JR, López N. Influence of Oxygen Vacancies and Surface Facets on Water Oxidation Selectivity toward Oxygen or Hydrogen Peroxide with BiVO 4. ACS Catal 2021. [DOI: 10.1021/acscatal.1c03256] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Pavle Nikačević
- Institut Català d’Investigació Química (ICIQ), The Barcelona Institute of Science and Technology (BIST), Avda. Països Catalans, 16, 43007 Tarragona, Spain
| | - Franziska S. Hegner
- Institut Català d’Investigació Química (ICIQ), The Barcelona Institute of Science and Technology (BIST), Avda. Països Catalans, 16, 43007 Tarragona, Spain
| | - José Ramón Galán-Mascarós
- Institut Català d’Investigació Química (ICIQ), The Barcelona Institute of Science and Technology (BIST), Avda. Països Catalans, 16, 43007 Tarragona, Spain
- Catalan Institution for Research and Advanced Studies (ICREA), Passeig Lluís Companys 23, 08010 Barcelona, Spain
| | - Núria López
- Institut Català d’Investigació Química (ICIQ), The Barcelona Institute of Science and Technology (BIST), Avda. Països Catalans, 16, 43007 Tarragona, Spain
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23
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BiVO 4 Ceramic Photoanode with Enhanced Photoelectrochemical Stability. NANOMATERIALS 2021; 11:nano11092404. [PMID: 34578723 PMCID: PMC8466786 DOI: 10.3390/nano11092404] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/22/2021] [Revised: 08/24/2021] [Accepted: 09/10/2021] [Indexed: 11/17/2022]
Abstract
Monoclinic bismuth vanadate (BiVO4) is an attractive material with which to fabricate photoanodes due to its suitable band structure and excellent photoelectrochemical (PEC) performance. However, the poor PEC stability originating from its severe photo-corrosion greatly restricts its practical applications. In this paper, pristine and Mo doped BiVO4 ceramics were prepared using the spark plasma sintering (SPS) method, and their photoelectrochemical properties as photoanodes were investigated. The as-prepared 1% Mo doped BiVO4 ceramic (Mo-BVO (C)) photoanode exhibited enhanced PEC stability compared to 1% Mo doped BiVO4 films on fluorine doped Tin Oxide (FTO) coated glass substrates (Mo-BVO). Mo-BVO (C) exhibited a photocurrent density of 0.54 mA/cm2 and remained stable for 10 h at 1.23 V vs. reversible hydrogen electrode (RHE), while the photocurrent density of the Mo-BVO decreased from 0.66 mA/cm2 to 0.11 mA/cm2 at 1.23 V vs. RHE in 4 h. The experimental results indicated that the enhanced PEC stability of the Mo-BVO (C) could be attributed to its higher crystallinity, which could effectively inhibit the dissociation of vanadium in BiVO4 during the PEC process. This work may illustrate a novel ceramic design for the improvement of the stability of BiVO4 photoanodes, and might provide a general strategy for the improvement of the PEC stability of metal oxide photoanodes.
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24
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Li H, Qu Y, Zhang X. The gas sensor utilizing CeO2 nanorods for the low temperature detection of hydrogen. INORG CHEM COMMUN 2021. [DOI: 10.1016/j.inoche.2021.108692] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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25
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Cheng C, Fang Q, Fernandez-Alberti S, Long R. Controlling Charge Carrier Trapping and Recombination in BiVO 4 with the Oxygen Vacancy Oxidation State. J Phys Chem Lett 2021; 12:3514-3521. [PMID: 33793248 DOI: 10.1021/acs.jpclett.1c00713] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The lack of an in-depth understanding of the intrinsic oxygen vacancy (OV) defect properties in the photoanode BiVO4 limits the further improvement of its photoelectrochemical water splitting performance. To address this issue, nonadiabatic molecular dynamics simulations are performed to study the impact of OV on charge carrier lifetimes in BiVO4. The simulations show that a neutral OV gives rise to local structural distortions due to the formation of V-O-V bonds, forcing the electrons trapped on the nearer of the two V atoms to form two deep polaron-like V4+ hole traps. These localized midgap states greatly accelerate nonradiative electron-hole recombination compared to that of pristine BiVO4, reaching a time scale of several nanoseconds in good agreement with experiments. The ionized OV state restores the bandgap to its value in pristine BiVO4 and restores the charge carrier lifetimes due to the fast loss of coherence time. Our study reveals the mechanism of the detrimental role of OV in BiVO4 and provides valuable insights for improving the performance of the BiVO4 photoanode by ionizing the oxygen vacancy.
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Affiliation(s)
- Cheng Cheng
- College of Chemistry, Key Laboratory of Theoretical & Computational Photochemistry of Ministry of Education, Beijing Normal University, Beijing 100875, P. R. China
| | - Qiu Fang
- College of Chemistry, Key Laboratory of Theoretical & Computational Photochemistry of Ministry of Education, Beijing Normal University, Beijing 100875, P. R. China
| | - S Fernandez-Alberti
- Departamento de Ciencia y Tecnologia, Universidad Nacional de Quilmes/CONICET, B1876BXD Bernal, Argentina
| | - Run Long
- College of Chemistry, Key Laboratory of Theoretical & Computational Photochemistry of Ministry of Education, Beijing Normal University, Beijing 100875, P. R. China
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26
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Majumder S, Quang ND, Kim C, Kim D. Anion exchange and successive ionic layer adsorption and reaction-assisted coating of BiVO4 with Bi2S3 to produce nanostructured photoanode for enhanced photoelectrochemical water splitting. J Colloid Interface Sci 2021; 585:72-84. [DOI: 10.1016/j.jcis.2020.11.081] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Revised: 11/15/2020] [Accepted: 11/22/2020] [Indexed: 10/22/2022]
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Gu X, Luo Y, Li Q, Wang R, Fu S, Lv X, He Q, Zhang Y, Yan Q, Xu X, Ji F, Qiu Y. First-Principle Insight Into the Effects of Oxygen Vacancies on the Electronic, Photocatalytic, and Optical Properties of Monoclinic BiVO 4(001). Front Chem 2020; 8:601983. [PMID: 33363112 PMCID: PMC7758495 DOI: 10.3389/fchem.2020.601983] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Accepted: 10/28/2020] [Indexed: 01/27/2023] Open
Abstract
In this paper, first-principle calculations were performed to investigate the effects of oxygen (O) vacancies (Ovac) on the crystal structure, electronic distribution, adsorption energies of O2 and H2O and the density of states (DOS) of monoclinic bismuth vanadate (m-BiVO4). Ovac were stable when incorporated into m-BiVO4(001) and increased the adsorption energy of O2. Ovac changed the V3d orbitals of m-BiVO4(001) by adding a new band gap level, causing the redundant electrons of V atoms to become carriers and promoting the separation efficiency of electrons and holes. To verify the first-principle calculations, m-BiVO4 with different Ovac levels was prepared via hydrothermal synthesis. X-ray diffraction (XRD) patterns confirmed the existence of the (001) crystal surface of m-BiVO4. In addition, X-ray photoelectron spectroscopy (XPS) and electron spin resonance (ESR) spectroscopy of m-BiVO4 confirmed the presence of Ovac and demonstrated that, as the Ovac level increased, the number of superoxide radicals (O 2 - · ) and hydroxyl radicals (·OH) produced increased. In addition, m-BiVO4 with a higher Ovac level possessed superior photocatalytic properties to and degraded rhodamine B (RhB) dye nearly 2-fold faster than m-BiVO4 with a lower Ovac level. Finally, the removal rate of RhB increased from 23 to 44%. All experimental results were in good agreement with the first-principle calculated results.
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Affiliation(s)
- Xiaosong Gu
- Key Laboratory of Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing, China
| | - Yujie Luo
- Key Laboratory of Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing, China
| | - Qi Li
- Key Laboratory of Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing, China
| | - Rui Wang
- Department of Physics, Center for Quantum Materials and Devices, Institute for Structure and Function, Chongqing University, Chongqing, China
| | - Shiqi Fu
- Key Laboratory of Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing, China
| | - Xiulong Lv
- Key Laboratory of Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing, China
| | - Qian He
- Key Laboratory of Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing, China
| | - Ying Zhang
- Key Laboratory of Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing, China
| | - Qiutong Yan
- Key Laboratory of Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing, China
| | - Xuan Xu
- Key Laboratory of Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing, China
| | - Fangying Ji
- Key Laboratory of Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing, China
| | - Yan Qiu
- School of Architectural Engineering, Yunnan Agricultural University, Kunming, China
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28
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Pan J, Wang B, Wang J, Ding H, Zhou W, Liu X, Zhang J, Shen S, Guo J, Chen L, Au C, Jiang L, Yin S. Activity and Stability Boosting of an Oxygen‐Vacancy‐Rich BiVO
4
Photoanode by NiFe‐MOFs Thin Layer for Water Oxidation. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202012550] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Jin‐Bo Pan
- College of Chemistry and Chemical Engineering State Key Laboratory of Chemo/Biosensing and Chemometrics Advanced Catalytic Engineering Research Center of the Ministry of Education Hunan University Changsha 410082 P. R. China
| | - Bing‐Hao Wang
- College of Chemistry and Chemical Engineering State Key Laboratory of Chemo/Biosensing and Chemometrics Advanced Catalytic Engineering Research Center of the Ministry of Education Hunan University Changsha 410082 P. R. China
| | - Jin‐Bo Wang
- College of Chemistry and Chemical Engineering State Key Laboratory of Chemo/Biosensing and Chemometrics Advanced Catalytic Engineering Research Center of the Ministry of Education Hunan University Changsha 410082 P. R. China
| | - Hong‐Zhi Ding
- College of Chemistry and Chemical Engineering State Key Laboratory of Chemo/Biosensing and Chemometrics Advanced Catalytic Engineering Research Center of the Ministry of Education Hunan University Changsha 410082 P. R. China
| | - Wei Zhou
- College of Chemistry and Chemical Engineering State Key Laboratory of Chemo/Biosensing and Chemometrics Advanced Catalytic Engineering Research Center of the Ministry of Education Hunan University Changsha 410082 P. R. China
| | - Xuan Liu
- College of Chemistry and Chemical Engineering State Key Laboratory of Chemo/Biosensing and Chemometrics Advanced Catalytic Engineering Research Center of the Ministry of Education Hunan University Changsha 410082 P. R. China
| | - Jin‐Rong Zhang
- College of Chemistry and Chemical Engineering State Key Laboratory of Chemo/Biosensing and Chemometrics Advanced Catalytic Engineering Research Center of the Ministry of Education Hunan University Changsha 410082 P. R. China
| | - Sheng Shen
- College of Chemistry and Chemical Engineering State Key Laboratory of Chemo/Biosensing and Chemometrics Advanced Catalytic Engineering Research Center of the Ministry of Education Hunan University Changsha 410082 P. R. China
| | - Jun‐Kang Guo
- College of Chemistry and Chemical Engineering State Key Laboratory of Chemo/Biosensing and Chemometrics Advanced Catalytic Engineering Research Center of the Ministry of Education Hunan University Changsha 410082 P. R. China
| | - Lang Chen
- College of Chemistry and Chemical Engineering State Key Laboratory of Chemo/Biosensing and Chemometrics Advanced Catalytic Engineering Research Center of the Ministry of Education Hunan University Changsha 410082 P. R. China
| | - Chak‐Tong Au
- College of Chemical Engineering Fuzhou University Fuzhou 350002 P. R. China
| | - Li‐Long Jiang
- College of Chemical Engineering Fuzhou University Fuzhou 350002 P. R. China
| | - Shuang‐Feng Yin
- College of Chemistry and Chemical Engineering State Key Laboratory of Chemo/Biosensing and Chemometrics Advanced Catalytic Engineering Research Center of the Ministry of Education Hunan University Changsha 410082 P. R. China
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29
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Pan J, Wang B, Wang J, Ding H, Zhou W, Liu X, Zhang J, Shen S, Guo J, Chen L, Au C, Jiang L, Yin S. Activity and Stability Boosting of an Oxygen‐Vacancy‐Rich BiVO
4
Photoanode by NiFe‐MOFs Thin Layer for Water Oxidation. Angew Chem Int Ed Engl 2020; 60:1433-1440. [DOI: 10.1002/anie.202012550] [Citation(s) in RCA: 105] [Impact Index Per Article: 26.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Indexed: 11/10/2022]
Affiliation(s)
- Jin‐Bo Pan
- College of Chemistry and Chemical Engineering State Key Laboratory of Chemo/Biosensing and Chemometrics Advanced Catalytic Engineering Research Center of the Ministry of Education Hunan University Changsha 410082 P. R. China
| | - Bing‐Hao Wang
- College of Chemistry and Chemical Engineering State Key Laboratory of Chemo/Biosensing and Chemometrics Advanced Catalytic Engineering Research Center of the Ministry of Education Hunan University Changsha 410082 P. R. China
| | - Jin‐Bo Wang
- College of Chemistry and Chemical Engineering State Key Laboratory of Chemo/Biosensing and Chemometrics Advanced Catalytic Engineering Research Center of the Ministry of Education Hunan University Changsha 410082 P. R. China
| | - Hong‐Zhi Ding
- College of Chemistry and Chemical Engineering State Key Laboratory of Chemo/Biosensing and Chemometrics Advanced Catalytic Engineering Research Center of the Ministry of Education Hunan University Changsha 410082 P. R. China
| | - Wei Zhou
- College of Chemistry and Chemical Engineering State Key Laboratory of Chemo/Biosensing and Chemometrics Advanced Catalytic Engineering Research Center of the Ministry of Education Hunan University Changsha 410082 P. R. China
| | - Xuan Liu
- College of Chemistry and Chemical Engineering State Key Laboratory of Chemo/Biosensing and Chemometrics Advanced Catalytic Engineering Research Center of the Ministry of Education Hunan University Changsha 410082 P. R. China
| | - Jin‐Rong Zhang
- College of Chemistry and Chemical Engineering State Key Laboratory of Chemo/Biosensing and Chemometrics Advanced Catalytic Engineering Research Center of the Ministry of Education Hunan University Changsha 410082 P. R. China
| | - Sheng Shen
- College of Chemistry and Chemical Engineering State Key Laboratory of Chemo/Biosensing and Chemometrics Advanced Catalytic Engineering Research Center of the Ministry of Education Hunan University Changsha 410082 P. R. China
| | - Jun‐Kang Guo
- College of Chemistry and Chemical Engineering State Key Laboratory of Chemo/Biosensing and Chemometrics Advanced Catalytic Engineering Research Center of the Ministry of Education Hunan University Changsha 410082 P. R. China
| | - Lang Chen
- College of Chemistry and Chemical Engineering State Key Laboratory of Chemo/Biosensing and Chemometrics Advanced Catalytic Engineering Research Center of the Ministry of Education Hunan University Changsha 410082 P. R. China
| | - Chak‐Tong Au
- College of Chemical Engineering Fuzhou University Fuzhou 350002 P. R. China
| | - Li‐Long Jiang
- College of Chemical Engineering Fuzhou University Fuzhou 350002 P. R. China
| | - Shuang‐Feng Yin
- College of Chemistry and Chemical Engineering State Key Laboratory of Chemo/Biosensing and Chemometrics Advanced Catalytic Engineering Research Center of the Ministry of Education Hunan University Changsha 410082 P. R. China
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30
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Wang S, He T, Chen P, Du A, Ostrikov KK, Huang W, Wang L. In Situ Formation of Oxygen Vacancies Achieving Near-Complete Charge Separation in Planar BiVO 4 Photoanodes. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2020; 32:e2001385. [PMID: 32406092 DOI: 10.1002/adma.202001385] [Citation(s) in RCA: 106] [Impact Index Per Article: 26.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Revised: 04/08/2020] [Accepted: 04/15/2020] [Indexed: 06/11/2023]
Abstract
Despite a suitable bandgap of bismuth vanadate (BiVO4 ) for visible light absorption, most of the photogenerated holes in BiVO4 photoanodes are vanished before reaching the surfaces for oxygen evolution reaction due to the poor charge separation efficiency in the bulk. Herein, a new sulfur oxidation strategy is developed to prepare planar BiVO4 photoanodes with in situ formed oxygen vacancies, which increases the majority charge carrier density and photovoltage, leading to a record charge separation efficiency of 98.2% among the reported BiVO4 photoanodes. Upon loading NiFeOx as an oxygen evolution cocatalyst, a stable photocurrent density of 5.54 mA cm-2 is achieved at 1.23 V versus the reversible hydrogen electrode (RHE) under AM 1.5 G illumination. Remarkably, a dual-photoanode configuration further enhances the photocurrent density up to 6.24 mA cm-2 , achieving an excellent applied bias photon-to-current efficiency of 2.76%. This work demonstrates a simple thermal treatment approach to generate oxygen vacancies for the design of efficient planar photoanodes for solar hydrogen production.
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Affiliation(s)
- Songcan Wang
- Frontiers Science Center for Flexible Electronics (FSCFE), Shaanxi Institute of Flexible Electronics (SIFE) & Shaanxi Institute of Biomedical Materials and Engineering (SIBME), Northwestern Polytechnical University (NPU), 127 West Youyi Road, Xi'an, 710072, China
- Nanomaterials Centre, School of Chemical Engineering and Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, QLD, 4072, Australia
| | - Tianwei He
- School of Chemistry and Physics and Centre for Materials Science, Queensland University of Technology, Brisbane, QLD, 4000, Australia
| | - Peng Chen
- Nanomaterials Centre, School of Chemical Engineering and Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, QLD, 4072, Australia
| | - Aijun Du
- School of Chemistry and Physics and Centre for Materials Science, Queensland University of Technology, Brisbane, QLD, 4000, Australia
| | - Kostya Ken Ostrikov
- School of Chemistry and Physics and Centre for Materials Science, Queensland University of Technology, Brisbane, QLD, 4000, Australia
| | - Wei Huang
- Frontiers Science Center for Flexible Electronics (FSCFE), Shaanxi Institute of Flexible Electronics (SIFE) & Shaanxi Institute of Biomedical Materials and Engineering (SIBME), Northwestern Polytechnical University (NPU), 127 West Youyi Road, Xi'an, 710072, China
| | - Lianzhou Wang
- Nanomaterials Centre, School of Chemical Engineering and Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, QLD, 4072, Australia
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31
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Lin H, Long X, An Y, Yang S. In situ growth of Fe2WO6 on WO3 nanosheets to fabricate heterojunction arrays for boosting solar water splitting. J Chem Phys 2020; 152:214704. [DOI: 10.1063/5.0008227] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- He Lin
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
- Guangdong Key Laboratory of Nano-Micro Materials Research, School of Chemical Biology and Biotechnology, Shenzhen Graduate School, Peking University, Shenzhen 518055, China
| | - Xia Long
- Guangdong Key Laboratory of Nano-Micro Materials Research, School of Chemical Biology and Biotechnology, Shenzhen Graduate School, Peking University, Shenzhen 518055, China
| | - Yiming An
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
| | - Shihe Yang
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
- Guangdong Key Laboratory of Nano-Micro Materials Research, School of Chemical Biology and Biotechnology, Shenzhen Graduate School, Peking University, Shenzhen 518055, China
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