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Wang X, Wu L, Wang J, Zhou Y, Wang Y, Wu WD, Li W, Wu Z. Oxygen vacancies and interfacial iron sites in hierarchical BiOCl nanosheet microflowers cooperatively promoting photo-Fenton. CHEMOSPHERE 2022; 307:135967. [PMID: 35952795 DOI: 10.1016/j.chemosphere.2022.135967] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/20/2022] [Revised: 08/01/2022] [Accepted: 08/02/2022] [Indexed: 06/15/2023]
Abstract
Controllable active site construction, crystal structure regulation and efficient charge separation are core issues in heterogeneous photo-Fenton. Herein, abundant oxygen vacancies and well-dispersed interfacial iron sites are simultaneously constructed in hierarchical nanosheet-assembled BiOCl microflowers. The composites exhibit superior performance in photo-Fenton oxidation of carbamazepine (10 mg L-1) with a low H2O2 concentration (1.3 mM). The high performance highly depends on the synergistic effects between oxygen vacancies and iron species. Rather than modulating the valence band, the involvements of oxygen vacancies and iron species could modify the conduction band of BiOCl. The presence of oxygen vacancies promotes the migration of photo-generated electrons and accelerates the redox cycling of ≡Fe(III)/≡Fe(II) to boost the activation of H2O2 to generate hydroxyl radicals, and oxygen vacancies can be well preserved after cyclic use. This work provides understanding on efficient utilization of oxygen vacancies and interfacial iron sites to assist photo-Fenton and the underlying electron transfer mechanism.
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Affiliation(s)
- Xiaoning Wang
- Particle Engineering Laboratory, School of Chemical and Environmental Engineering, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou City, Jiangsu, 215123, PR China
| | - Lei Wu
- Particle Engineering Laboratory, School of Chemical and Environmental Engineering, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou City, Jiangsu, 215123, PR China
| | - Jinxiu Wang
- Department of Chemistry and Laboratory of Advanced Materials, Fudan University, Shanghai, 200433, PR China
| | - Yanru Zhou
- Particle Engineering Laboratory, School of Chemical and Environmental Engineering, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou City, Jiangsu, 215123, PR China
| | - Ying Wang
- Particle Engineering Laboratory, School of Chemical and Environmental Engineering, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou City, Jiangsu, 215123, PR China
| | - Winston Duo Wu
- Particle Engineering Laboratory, School of Chemical and Environmental Engineering, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou City, Jiangsu, 215123, PR China
| | - Wei Li
- Department of Chemistry and Laboratory of Advanced Materials, Fudan University, Shanghai, 200433, PR China.
| | - Zhangxiong Wu
- Particle Engineering Laboratory, School of Chemical and Environmental Engineering, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou City, Jiangsu, 215123, PR China.
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Wu L, Jiang G, Wang X, Wang Y, Zhou Y, Wu Z. Amorphous iron oxides anchored on BiOCl nanoplates as robust catalysts for high-performance photo-Fenton oxidation. J Colloid Interface Sci 2022; 622:62-74. [PMID: 35489102 DOI: 10.1016/j.jcis.2022.04.092] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Revised: 03/28/2022] [Accepted: 04/16/2022] [Indexed: 11/28/2022]
Abstract
Semiconductor supported iron oxides are highly promising catalysts to remove organic pollutants in photo-Fenton. Development of robust composite catalysts with both high activity and stability is essential. In this work, amorphous iron oxide layers are uniformly and tightly anchored on two-dimensional (2D) BiOCl nanoplates through post precipitation-deposition and subsequent low-temperature thermal treatment at 150-350 °C. A low iron loading amount (1-2 wt.%) is sufficient to make the resulted composite (BiOCl-Fe) catalysts superior in photo-Fenton oxidation of phenol (10 mg/L) with high mineralization efficiency (up to about 80% in 60 min). The low-temperature thermal treatment can significantly enhance the stability of catalysts with much less iron leached and high photo-Fenton performance maintained. The intimate contact between the amorphous iron oxide layers and the 2D BiOCl nanoplates could guarantee the fluent electron transfer and efficient activation of H2O2 at interfaces. Compared with the pristine BiOCl, the BiOCl-Fe catalysts possess faster separation of the charge carriers. The predominant active species turns from O2•- in photocatalysis to HO• in the photo-Fenton catalysis. This research could provide enhanced understanding on the synthesis of robust catalysts and the structure optimization of BiOCl supported iron oxides for photo-Fenton.
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Affiliation(s)
- Lei Wu
- Particle Engineering Laboratory (PEL), School of Chemical and Environmental Engineering, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou City, Jiangsu 215123, PR China
| | - Guanyun Jiang
- Particle Engineering Laboratory (PEL), School of Chemical and Environmental Engineering, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou City, Jiangsu 215123, PR China
| | - Xiaoning Wang
- Particle Engineering Laboratory (PEL), School of Chemical and Environmental Engineering, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou City, Jiangsu 215123, PR China.
| | - Ying Wang
- Particle Engineering Laboratory (PEL), School of Chemical and Environmental Engineering, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou City, Jiangsu 215123, PR China
| | - Yanru Zhou
- Particle Engineering Laboratory (PEL), School of Chemical and Environmental Engineering, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou City, Jiangsu 215123, PR China
| | - Zhangxiong Wu
- Particle Engineering Laboratory (PEL), School of Chemical and Environmental Engineering, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou City, Jiangsu 215123, PR China.
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Qing Y, Li Y, Hu D, Guo Z, Yang Y, Geng L, Li W. 2D/2D Bi 2WO 6/Protonated g-C 3N 4 step-scheme heterojunctions for enhancing the photodegradation of 17β-estradiol: promotional role of electrostatic interaction. NEW J CHEM 2022. [DOI: 10.1039/d1nj05334e] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A Bi2WO6/protonated g-C3N4 step-scheme heterojunction with an intimate interface though electrostatic interaction exhibited enhanced photodegradation of 17β-estradiol under visible light.
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Affiliation(s)
- Yashi Qing
- CAS Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yanxiang Li
- CAS Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Dan Hu
- Key Laboratory of Cleaner Production and Integrated Resource Utilization of China National Light Industry, Beijing Technology and Business University, Beijing 100048, China
| | - Zhiwei Guo
- CAS Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
| | - Yujie Yang
- CAS Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Lihong Geng
- Key Laboratory of Polymer Materials and Products of Universities in Fujian, Fujian University of Technology, Fujian 350108, China
| | - Wangliang Li
- CAS Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
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Qi R, Liu J, Yuan H, Yu Y. Sulfur-Doped BiOCl with Enhanced Light Absorption and Photocatalytic Water Oxidation Activity. NANOMATERIALS (BASEL, SWITZERLAND) 2021; 11:2221. [PMID: 34578537 PMCID: PMC8472310 DOI: 10.3390/nano11092221] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/09/2021] [Revised: 08/23/2021] [Accepted: 08/26/2021] [Indexed: 11/17/2022]
Abstract
Photocatalysis is a powerful strategy to address energy and environmental concerns. Sulfur-doped BiOCl was prepared through a facial hydrothermal method to improve the photocatalytic performance. Experimental results and theoretical calculations demonstrated that the band structure of the sulfur-doped BiOCl was optimally regulated and the light absorption range was expanded. It showed excellent visible-light photocatalytic water oxidation properties with a rate of 141.7 μmol h-1 g-1 (almost 44 times of that of the commercial BiOCl) with Pt as co-catalyst.
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Affiliation(s)
- Ruilian Qi
- College of Chemistry and Materials Engineering, Beijing Technology and Business University, Beijing 100048, China;
| | - Jian Liu
- Institute of Chemistry, Chinese Academy of Sciences, Beijing 100090, China;
| | - Huanxiang Yuan
- College of Chemistry and Materials Engineering, Beijing Technology and Business University, Beijing 100048, China;
| | - Yu Yu
- School of Science, Beijing Jiaotong University, Beijing 100044, China
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