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Wang M, Quesada-Cabrera R, Sathasivam S, Blunt MO, Borowiec J, Carmalt CJ. Visible-Light-Active Iodide-Doped BiOBr Coatings for Sustainable Infrastructure. ACS APPLIED MATERIALS & INTERFACES 2023; 15:49270-49280. [PMID: 37824823 PMCID: PMC10614188 DOI: 10.1021/acsami.3c11525] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2023] [Accepted: 09/27/2023] [Indexed: 10/14/2023]
Abstract
The search for efficient materials for sustainable infrastructure is an urgent challenge toward potential negative emission technologies and the global environmental crisis. Pleasant, efficient sunlight-activated coatings for applications in self-cleaning windows are sought in the glass industry, particularly those produced from scalable technologies. The current work presents visible-light-active iodide-doped BiOBr thin films fabricated using aerosol-assisted chemical vapor deposition. The impact of dopant concentration on the structural, morphological, and optical properties was studied systematically. The photocatalytic properties of the parent materials and as-deposited doped films were evaluated using the smart ink test. An optimized material was identified as containing 2.7 atom % iodide dopant. Insight into the photocatalytic behavior of these coatings was gathered from photoluminescence and photoelectrochemical studies. The optimum photocatalytic performance could be explained from a balance between photon absorption, charge generation, carrier separation, and charge transport properties under 450 nm irradiation. This optimized iodide-doped BiOBr coating is an excellent candidate for the photodegradation of volatile organic pollutants, with potential applications in self-cleaning windows and other surfaces.
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Affiliation(s)
- Mingyue Wang
- Department
of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, U.K.
| | - Raul Quesada-Cabrera
- Department
of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, U.K.
- Department
of Chemistry, Institute of Environmental
Studies and Natural Resources (i-UNAT, FEAM), Universidad de Las Palmas
de Gran Canaria, Campus
de Tafira, Las Palmas 35017, Spain
| | - Sanjayan Sathasivam
- Department
of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, U.K.
- School
of Engineering, London South Bank University, London SE1 0AA, U.K.
| | - Matthew O. Blunt
- Department
of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, U.K.
| | - Joanna Borowiec
- Department
of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, U.K.
| | - Claire J. Carmalt
- Department
of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, U.K.
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2
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Mei H, Wang Z, Jin D, Zhang R, Wang X. Constructing BiOBr 1-xI x-y with Abundant Surface Br Vacancies for Excellent Visible-Light Photodegradation Capability of High-Concentration Refractory Contaminants. Inorg Chem 2023; 62:12822-12831. [PMID: 37525121 DOI: 10.1021/acs.inorgchem.3c01457] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/02/2023]
Abstract
Bismuth oxybromide (BiOBr) is a promising photocatalytic semiconductor material due to its unique hierarchical structure and band structure. However, its photocatalytic applications are restricted due to its narrow visible-light absorption range and poor photooxidation capability. In this study, BiOBr1-xIx-y with rich surface Br vacancies (BrVs-rich BiOBr1-xIx-y) was created via a facile indirect substitution strategy. Benefiting from the broadened visible-light response range and reduced recombination rate of photogenerated carriers, BiOBr1-xIx-y shows excellent visible-light photodegradation ability for high-concentration refractory contaminants, such as phenol, tetracycline, bisphenol A, rhodamine B, methyl orange, and even real wastewater. At the same time, the Br vacancies can regulate the band structure of BiOBr1-xIx-y and serve as trap states to promote charge separation, thus facilitating surface photoredox reactions. An in-depth investigation of the Br vacancy effect and photodegradation mechanism was conducted. This novel study revealed the significance of Br vacancies in enhancing the photocatalytic performance of BiOBr under visible light, providing a promising strategy for improving the utilization efficiency of sunlight in wastewater treatment.
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Affiliation(s)
- Hao Mei
- School of Future Technology, Nanchang University, 999 Xuefu Road, Nanchang 330031, China
| | - Zhichen Wang
- School of Future Technology, Nanchang University, 999 Xuefu Road, Nanchang 330031, China
| | - Dai Jin
- School of Future Technology, Nanchang University, 999 Xuefu Road, Nanchang 330031, China
| | - Rongbin Zhang
- Key Laboratory of Jiangxi Province for Environment and Energy Catalysis, College of Chemistry and Chemical Engineering, Nanchang University, 999 Xuefu Road, Nanchang 330031, China
| | - Xuewen Wang
- Key Laboratory of Jiangxi Province for Environment and Energy Catalysis, College of Chemistry and Chemical Engineering, Nanchang University, 999 Xuefu Road, Nanchang 330031, China
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Yu W, Geng N, Han J, Yu W, Peng Y. Mesoporous crystalline Ti 1-xSn xO 2 (0 < x < 1) solid solution for a high-performance photocatalyst under visible light irradiation. Front Chem 2022; 10:1111435. [PMID: 36590279 PMCID: PMC9794604 DOI: 10.3389/fchem.2022.1111435] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Accepted: 12/05/2022] [Indexed: 12/15/2022] Open
Abstract
We report a facile and effective inorganic polycondensation combined with aerosol-spray strategy towards high-performance photocatalyst by fabricating mesoporous Ti1-xSnxO2 (0 < x < 1) solid solution. Such Ti1-xSnxO2 nanocrystals with high Sn-doped contents are self-assembled into mesoporous spheres can effectively promote visible-light harvest and high quantum yield, leading a longer lifetime of the photoelectron-hole pairs and less recombination. Such the photocatalysts enhanced photocatalytic activity for the degradation of Rhodamine B (RhB). The representative Ti0.9Sn0.1O2 and Ti0.8Sn0.2O2 compounds reach an optimum degradation of ≈50% and 70%, respectively, after 120 min irradiation under visible irradiation. The mesoporous Ti1-xSnxO2 solid solution could inhibit the recombination of electron-hole pairs, which promote reaction thermodynamics and kinetics for RhB degradation.
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Qin Y, Yang B, Li H, Ma J. Immobilized BiOCl 0.75I 0.25/g-C 3N 4 nanocomposites for photocatalytic degradation of bisphenol A in the presence of effluent organic matter. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 842:156828. [PMID: 35760181 DOI: 10.1016/j.scitotenv.2022.156828] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2022] [Revised: 06/11/2022] [Accepted: 06/15/2022] [Indexed: 06/15/2023]
Abstract
The BiOCl0.75I0.25/g-C3N4 nanosheet (BCI-CN) was successfully immobilized on polyolefin polyester fiber (PPF) through the hydrothermal method. The novel immobilized BiOCl0.75I0.25/g-C3N4 nanocomposites (BCI-CN-PPF) were characterized by scanning electron microscope (SEM), energy dispersive spectroscopy EDS, X-ray powder diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and UV-vis diffuse reflectance spectroscopy (UV-vis DRS) to confirm that BCI-CN was successfully immobilized on PPF with abundant oxygen vacancies reserved. Under simulated solar light irradiation, 100 % of bisphenol A (BPA) with an initial concentration of 10 mg·L-1 was degraded by BCI-CN-PPF (0.2 g·L-1 of BCI-CN immobilized) after 60 min. A similar photocatalytic efficiency of BPA was obtained in the presence of effluent organic matter (EfOM). The photocatalytic degradation of BPA was not affected by EfOM <5 mg-C/L. In comparison, the photocatalytic performance was considerably inhibited by EfOM with a concentration of 10 mg-C/L. Furthermore, photogenerated holes and superoxide radicals predominated in the photocatalytic degradation processes of BPA. The total organic carbon (TOC) removal efficiencies of BPA and EfOM were 75.2 % and 50 % in the BCI-CN-PPF catalytic system. The BPA removal efficiency of 94.9 % was still achieved in the eighth cycle of repeated use. This study provides a promising immobilized nanocomposite with high photocatalytic activity and excellent recyclability and reusability for practical application in wastewater treatment.
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Affiliation(s)
- Yuyang Qin
- Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention, Department of Environmental Science & Engineering, Fudan University, Shanghai 200433, China
| | - Biqi Yang
- Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention, Department of Environmental Science & Engineering, Fudan University, Shanghai 200433, China
| | - Hongjing Li
- Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention, Department of Environmental Science & Engineering, Fudan University, Shanghai 200433, China.
| | - Jun Ma
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
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5
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Lu R, Zahid AH, Han Q. Insight into the photocatalytic mechanism of the optimal x value in the BiOBr xI 1-x, BiOCl xI 1-x and BiOCl xBr 1-x series varying with pollutant type. NANOSCALE 2022; 14:13711-13721. [PMID: 36093962 DOI: 10.1039/d2nr03726b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
It is known that bismuth oxyhalides (BiOX, X = Cl, Br, I) can easily form solid solutions like BiOBrxI1-x, BiOClxI1-x and BiOClxBr1-x (0 ≤ x ≤ 1) and exhibit composition-dependent photocatalytic performance. However, the reported results indicate that the optimal composition changes with pollutant type. That is to say, the specific x value with the best photocatalytic activity towards the degradation of a certain pollutant does not imply that it is an optimum x value for another pollutant. In order to explore the reason behind this, herein, three types of solid solutions with various x values were prepared in ethylene glycol/H2O (VEG : VH2O = 1) solution at room temperature, and their photocatalytic activity towards the degradation of bisphenol A (BPA), tetracycline (TC), malachite green (MG), methyl violet (MV) and rhodamine B (RhB) was assessed under visible-light illumination. Taking BiOBrxI1-x as an example, BiOBr0.5I0.5 exhibited the best degradation efficiency for BPA, MV and MG, whereas BiOBr0.95I0.05 possessed the best photocatalytic activity towards TC and RhB degradation. Detailed characterization suggests that light absorption and charge separation efficiency are not the main factors behind this difference. Given that direct oxidation of the holes was dominant in the degradation process, the oxidation ability of the solid solutions was correlated with the oxidation behavior of the pollutant. The prerequisite condition for degrading a certain pollutant is that the valence band potential of the solid solution should be more positive than the oxidation potential of the pollutant, and yet, too big a difference between these two potentials does not benefit rapid degradation.
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Affiliation(s)
- Ruixin Lu
- Key Laboratory for Soft Chemistry and Functional Materials, Ministry of Education, Nanjing University of Science and Technology, Nanjing 210094, China.
| | - Abdul Hannan Zahid
- Key Laboratory for Soft Chemistry and Functional Materials, Ministry of Education, Nanjing University of Science and Technology, Nanjing 210094, China.
| | - Qiaofeng Han
- Key Laboratory for Soft Chemistry and Functional Materials, Ministry of Education, Nanjing University of Science and Technology, Nanjing 210094, China.
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Hussein Abdurahman M, Zuhairi Abdullah A, Da Oh W, Fazliani Shopware N, Faisal Gasim M, Okoye P, Ul-Hamid A, Rahman Mohamed A. Tunable band structure of synthesized carbon dots modified graphitic carbon nitride/bismuth oxychlorobromide heterojunction for photocatalytic degradation of tetracycline in water. J Colloid Interface Sci 2022; 629:189-205. [PMID: 36067598 DOI: 10.1016/j.jcis.2022.08.172] [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: 06/08/2022] [Revised: 08/21/2022] [Accepted: 08/27/2022] [Indexed: 11/28/2022]
Abstract
In this study, graphitic carbon nitride (CN) decorated with carbon quantum dot (CQD) and bismuth oxychlorobromide (BiOClxBr1-x) was fabricated by calcination and hydrothermal methods. The morphology characterization of the synthesized photocatalyst revealed that CQD and BiOClxBr1-x solid solution were deposited on the CN surface. CQD served as the electron reservoir, which could reduce the recombination of electron-hole pairs, thus improving the overall photocatalytic performance. The synergistic effect of 1 wt% CQDs and BiOCl0.75Br0.25 markedly improved the interfacial charge transfer efficiency and light-harvesting capacity of the composite. The degradation rate of tetracycline (TC) over CN/CQD/BiOCl0.75Br0.25 was 83.4 % after 30 min and favorable stability with near-initial capacity under visible light irradiation. Meanwhile, the reaction mechanism of the photocatalytic performance was demonstrated by the analysis of the surface adsorption sites, efficient utilization of visible light, and charge carrier transfer. The degradation by-products and potential degradation pathways were also analyzed using liquid chromatography-mass spectrometry. Finally, the toxicity estimation software tool (T.E.S.T) analysis indicated that the toxicity of most intermediates was lower than TC. This work provideed a strategy for fabricating visible light (VL) photocatalyst with excellent photocatalytic activity, furnishing a new insight for interface charge transfer.
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Affiliation(s)
- Mohamed Hussein Abdurahman
- School of Chemical Engineering, Universiti Sains Malaysia, Engineering Campus, 14300 Nibong Tebal, Penang, Malaysia
| | - Ahmad Zuhairi Abdullah
- School of Chemical Engineering, Universiti Sains Malaysia, Engineering Campus, 14300 Nibong Tebal, Penang, Malaysia.
| | - Wen Da Oh
- School of Chemical Sciences, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia
| | - Noor Fazliani Shopware
- Faculty of Bioengineering and Technology, Universiti Malaysia Kelantan, Kampus Jeli, Kelantan, Malaysia
| | - Mohamed Faisal Gasim
- School of Chemical Sciences, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia
| | - Patrick Okoye
- Instituto de Energías Renovables, Universidad Nacional Autónoma de México, Priv. Xochicalco s/n, Col. Centro, Temixco, Morelos, CP 62580, Mexico
| | - Anwar Ul-Hamid
- Center for Engineering Research, Research Institute, King Fahd University of Petroleum & Minerals, Dhahran 31261, Saudi Arabia
| | - Abdul Rahman Mohamed
- School of Chemical Engineering, Universiti Sains Malaysia, Engineering Campus, 14300 Nibong Tebal, Penang, Malaysia
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7
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Gao X, Li Q, Zhu W, Li X, Guo Y. N, S co-doped graphene quantum dots promote charge separation of Bi4O5BrxI2−x solid solution and enhance visible light photocatalytic performance. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.129155] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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8
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Liu S, Liang P, Liu J, Xin J, Li X, Shao C, Li X, Liu Y. Anchoring bismuth oxybromo-iodide solid solutions on flexible electrospun polyacrylonitrile nanofiber mats for floating photocatalysis. J Colloid Interface Sci 2022; 608:3178-3191. [PMID: 34802760 DOI: 10.1016/j.jcis.2021.11.046] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2021] [Revised: 11/09/2021] [Accepted: 11/10/2021] [Indexed: 01/22/2023]
Abstract
Constructing floating photocatalysts with highly efficient visible-light utilization is a promising approach for practical photocatalytic wastewater treatment. In this study, we anchored bismuth oxybromo-iodide (BiOBrxI1-x (0 ≤ x ≤ 1)) on flexible electrospun polyacrylonitrile (PAN) nanofiber mats to create BiOBrxI1-x@PAN nanofibers with tunable light absorption properties as floating photocatalysts at room temperature. As x increased, the photocatalytic activity of the BiOBrxI1-x@PAN nanofibers with similar loading content initially increased, and then decreased, for the degradation of bisphenol A (BPA) and methyl orange (MO) under visible-light irradiation (λ > 420 nm) conditions. The BiOBrxI1-x@PAN (0 < x < 1) nanofibers exhibited better photocatalytic performance compared to the BiOBr@PAN and BiOI@PAN nanofibers. Under visible-light irradiation, the BPA degradation rate of the BiOBr0.5I0.5@PAN nanofibers was 1.9 times higher than that of the BiOI@PAN nanofibers, while the BiOBr@PAN nanofibers had no noticeable degradation performance. The MO degradation rate of the BiOBr0.5I0.5@PAN nanofibers was 2.5 and 3.2 times higher than that of the BiOBr@PAN and BiOI@PAN nanofibers, respectively. The enhanced performance possibly originated from a balance between the light absorption and redox capabilities, along with efficient separation of electron-hole pairs in the BiOBr0.5I0.5@PAN nanofibers, as determined by ultraviolet-visible diffuse reflectance spectroscopy, X-ray photoelectron spectra analysis of the valence bands, and photocurrent response characterization. Compared to the powder structures, the BiOBrxI1-x@PAN nanofibers showed enhanced performance due to the excellent dispersion and immobilization of the BiOBrxI1-x solid solution, which provided more active sites during photocatalytic degradation. In addition, their flexible self-supporting structures allowed for floating photocatalysis near the water surface. They could be reused directly without separation and maximized the absorption of visible light during the photocatalytic reaction. Therefore, these solid-solution-based floatable nanofiber photocatalysts are good potential candidates for wastewater treatment applications.
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Affiliation(s)
- Shuai Liu
- Center for Advanced Optoelectronic Functional Materials Research, and Key Laboratory of UV Light-Emitting Materials and Technology of Ministry of Education, Northeast Normal University, 5268 Renmin Street, Changchun 130024, People's Republic of China; College of Science, Northeast Electric Power University, 169 Changchun Street, Jilin 132012, People's Republic of China
| | - Pingping Liang
- Center for Advanced Optoelectronic Functional Materials Research, and Key Laboratory of UV Light-Emitting Materials and Technology of Ministry of Education, Northeast Normal University, 5268 Renmin Street, Changchun 130024, People's Republic of China
| | - Jie Liu
- Center for Advanced Optoelectronic Functional Materials Research, and Key Laboratory of UV Light-Emitting Materials and Technology of Ministry of Education, Northeast Normal University, 5268 Renmin Street, Changchun 130024, People's Republic of China
| | - Jiayu Xin
- Center for Advanced Optoelectronic Functional Materials Research, and Key Laboratory of UV Light-Emitting Materials and Technology of Ministry of Education, Northeast Normal University, 5268 Renmin Street, Changchun 130024, People's Republic of China
| | - Xinghua Li
- Center for Advanced Optoelectronic Functional Materials Research, and Key Laboratory of UV Light-Emitting Materials and Technology of Ministry of Education, Northeast Normal University, 5268 Renmin Street, Changchun 130024, People's Republic of China.
| | - Changlu Shao
- Center for Advanced Optoelectronic Functional Materials Research, and Key Laboratory of UV Light-Emitting Materials and Technology of Ministry of Education, Northeast Normal University, 5268 Renmin Street, Changchun 130024, People's Republic of China.
| | - Xiaowei Li
- Center for Advanced Optoelectronic Functional Materials Research, and Key Laboratory of UV Light-Emitting Materials and Technology of Ministry of Education, Northeast Normal University, 5268 Renmin Street, Changchun 130024, People's Republic of China
| | - Yichun Liu
- Center for Advanced Optoelectronic Functional Materials Research, and Key Laboratory of UV Light-Emitting Materials and Technology of Ministry of Education, Northeast Normal University, 5268 Renmin Street, Changchun 130024, People's Republic of China
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9
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Solvothermal synthesis of BiOBrxI1-x (x = 0.0–1.0) solid solutions used for adsorption and photodegradation of cationic and anionic dyes. INORG CHEM COMMUN 2021. [DOI: 10.1016/j.inoche.2021.109054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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10
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Fu M, Yang J, Sun X, Tian W, Yin G, Tian S, Tan M, Liu H, Xing X, Huang H. Photo-Fenton Process over an Fe-Free 3%-CuO/Sr 0.76Ce 0.16WO 4 Photocatalyst under Simulated Sunlight. ACS OMEGA 2021; 6:27297-27304. [PMID: 34693150 PMCID: PMC8529691 DOI: 10.1021/acsomega.1c04107] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/01/2021] [Accepted: 10/01/2021] [Indexed: 06/13/2023]
Abstract
Photo-Fenton is a promising photocatalytic technology that utilizes sunlight. Herein, an Fe-free 3%-CuO/Sr0.76Ce0.16WO4 photocatalyst was synthesized to apply simulated wastewater degradation via a photo-Fenton process under simulated sunlight. The photodegradation efficiency of RhB solution over the 3%-CuO/Sr0.76Ce0.16WO4 photocatalyst is 93.2% in the first 3 h; its photocatalytic efficiency remains at 91.6% even after three cycle experiments. The kinetic constant of the 3%-CuO/Sr0.76Ce0.16WO4 photocatalyst is 0.0127 min-1, which is 2.8-fold that of an intrinsic Sr0.76Ce0.16WO4 sample. The experiment of radical quenching revealed that the photogenerated electrons and holes are transferred to CuO to form hydroxyl radicals. Besides, the photocatalyst was characterized by scanning electron microscopy (SEM), Fourier transform infrared (FT-IR) spectroscopy, X-ray diffraction (XRD), diffused reflectance spectroscopy (DRS), and X-ray photoelectron spectroscopy (XPS) measurements. It has some reference significance for the design of iron-free photocatalysts.
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Affiliation(s)
- Mingyan Fu
- Chongqing Key Laboratory
of Inorganic Special Functional Materials, College of Chemistry and
Chemical Engineering, Yangtze Normal University, Fuling, Chongqing 408100, P. R. China
| | - Jia Yang
- Chongqing Key Laboratory
of Inorganic Special Functional Materials, College of Chemistry and
Chemical Engineering, Yangtze Normal University, Fuling, Chongqing 408100, P. R. China
| | - Xiaorui Sun
- Chongqing Key Laboratory
of Inorganic Special Functional Materials, College of Chemistry and
Chemical Engineering, Yangtze Normal University, Fuling, Chongqing 408100, P. R. China
| | - Wei Tian
- Chongqing Key Laboratory
of Inorganic Special Functional Materials, College of Chemistry and
Chemical Engineering, Yangtze Normal University, Fuling, Chongqing 408100, P. R. China
| | - Guihua Yin
- Chongqing Key Laboratory
of Inorganic Special Functional Materials, College of Chemistry and
Chemical Engineering, Yangtze Normal University, Fuling, Chongqing 408100, P. R. China
| | - Sheng Tian
- Chongqing Key Laboratory
of Inorganic Special Functional Materials, College of Chemistry and
Chemical Engineering, Yangtze Normal University, Fuling, Chongqing 408100, P. R. China
| | - Mingdan Tan
- Chongqing Key Laboratory
of Inorganic Special Functional Materials, College of Chemistry and
Chemical Engineering, Yangtze Normal University, Fuling, Chongqing 408100, P. R. China
| | - Hongfu Liu
- Chongqing Key Laboratory
of Inorganic Special Functional Materials, College of Chemistry and
Chemical Engineering, Yangtze Normal University, Fuling, Chongqing 408100, P. R. China
| | - Xiaofeng Xing
- Chongqing Key Laboratory
of Inorganic Special Functional Materials, College of Chemistry and
Chemical Engineering, Yangtze Normal University, Fuling, Chongqing 408100, P. R. China
| | - Huisheng Huang
- Chongqing Key Laboratory
of Inorganic Special Functional Materials, College of Chemistry and
Chemical Engineering, Yangtze Normal University, Fuling, Chongqing 408100, P. R. China
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11
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Engineering BiOBr I1 solid solutions with enhanced singlet oxygen production for photocatalytic benzylic C H bond activation mediated by N-hydroxyl compounds. CHINESE CHEM LETT 2021. [DOI: 10.1016/j.cclet.2021.02.006] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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12
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Duresa LW, Kuo DH, Huang HN. Room-temperature synthesized In-BiOBr 1-xI x nanosheets with visible-light-driven superior photocatalytic activity: Degradation of dye/non-dye organic pollutants for environmental remediation. CHEMOSPHERE 2020; 258:127374. [PMID: 32554021 DOI: 10.1016/j.chemosphere.2020.127374] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2020] [Revised: 06/07/2020] [Accepted: 06/08/2020] [Indexed: 06/11/2023]
Abstract
Photocatalysis is extensively investigated as a green, efficient and promising technique for environmental remediation. In this study, a series of template free In-doped BiOBrxI1-x photocatalysts have been successfully prepared at room temperature and characterized by various methods. Complete degradation of negatively charged methyl Orange, positively charged Rhodamine B and Methylene Blue organic dyes, and neutral and colorless non-dye organic compound of furfural was attained. The flat band potential offered the possibility of reduction of dissolved O2 to O2.- in the conduction band while the trapping experiment identified the (O2.-)is the main radical species followed by h+ for the photodegradation. In-BiOBrI-0.4 had an excellent photocatalytic degradation activity which could be due to the synergetic effect between metal ion doping and solid solution formation. It further promotes visible light-harvesting ability and photoinduced charge carrier separation efficiency. The order of the reaction rate was determined and the mechanism was proposed. This work can lay a base for the design of effective photocatalyst toward environmental remediation.
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Affiliation(s)
- Lalisa Wakjira Duresa
- Department of Materials Science and Engineering, National Taiwan University of Science and Technology, No.43, Sec. 4, Keelung Road, Taipei, 10607, Taiwan
| | - Dong-Hau Kuo
- Department of Materials Science and Engineering, National Taiwan University of Science and Technology, No.43, Sec. 4, Keelung Road, Taipei, 10607, Taiwan.
| | - Hsiu-Ni Huang
- Instrumentation Center, National Taiwan Normal University, No.162, Sec. 1, Heaping East Road, Taipei, 10607, Taiwan
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