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Wang C, Zhang Y, Liu H, Wu M, Chen R. Construction of Z-scheme Si−Fe2O3/Ti3C2/CdS composites for improved visible-light-responsive photocatalytic performance. Sep Purif Technol 2023. [DOI: 10.1016/j.seppur.2023.123403] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/13/2023]
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Qian Y, Shi J, Yang X, Yuan Y, Liu L, Zhou G, Yi J, Wang X, Wang S. Integration of biochar into Ag 3PO 4/α-Fe 2O 3 heterojunction for enhanced reactive oxygen species generation towards organic pollutants removal. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2022; 303:119131. [PMID: 35307498 DOI: 10.1016/j.envpol.2022.119131] [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: 08/28/2021] [Revised: 02/23/2022] [Accepted: 03/09/2022] [Indexed: 06/14/2023]
Abstract
A biochar (BC) harbored Ag3PO4/α-Fe2O3 type-Ⅰ heterojunction (Ag-Fe-BC) was prepared by a hydrothermal-impregnation method to transfer active center of heterojunctions. The electrochemical and spectroscopic tests demonstrated that BC enhanced the catalytic performance of the heterojunction by enhancing photocurrent, reducing fluorescence intensity, and facilitating separation of electron-hole pairs. The photocatalytic activity showed the Ag-Fe-BC (5:1:3) could degrade Rhodamine B (20 mg/L) by up to 92.7%, which was 3.35 times higher than Ag3PO4/α-Fe2O3. Tetracycline and ciprofloxacin (20 mg/L) were degraded efficiently by 58.3% and 79.4% within 2 h, respectively. Electron paramagnetic resonance and scavenging experiments confirmed the major reactive oxygen species (ROS) consisted of singlet oxygen (1O2) and superoxide (·O2-). Excellent RhB adsorption and electrons capturing capacity of BC facilitated electron-hole pairs separation and ROS transferring to target organics followed by elevated degradation. Thus, a facile method was proposed to synthesize a highly efficient visible-light responsive photocatalyst for degradation of various organics in water.
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Affiliation(s)
- Yifan Qian
- College of Environmental Science and Engineering, Yangzhou University, Yangzhou, 225127, PR China
| | - Jun Shi
- College of Environmental Science and Engineering, Yangzhou University, Yangzhou, 225127, PR China
| | - Xianni Yang
- College of Environmental Science and Engineering, Yangzhou University, Yangzhou, 225127, PR China
| | - Yangfan Yuan
- College of Environmental Science and Engineering, Yangzhou University, Yangzhou, 225127, PR China
| | - Li Liu
- College of Environmental Science and Engineering, Yangzhou University, Yangzhou, 225127, PR China
| | - Ganghua Zhou
- College of Environmental Science and Engineering, Yangzhou University, Yangzhou, 225127, PR China
| | - Jianjian Yi
- College of Environmental Science and Engineering, Yangzhou University, Yangzhou, 225127, PR China
| | - Xiaozhi Wang
- College of Environmental Science and Engineering, Yangzhou University, Yangzhou, 225127, PR China; Joint International Research Laboratory of Agriculture and Agri-Product Safety of Ministry of Education of China, Yangzhou University, Yangzhou, 225127, Jiangsu, China; Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, PR China
| | - Shengsen Wang
- College of Environmental Science and Engineering, Yangzhou University, Yangzhou, 225127, PR China; Joint International Research Laboratory of Agriculture and Agri-Product Safety of Ministry of Education of China, Yangzhou University, Yangzhou, 225127, Jiangsu, China; Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, PR China.
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Gao Y, Ma H, Han C, Gui C, Deng C. Preparation of Ag 3PO 4/α-Fe 2O 3 hybrid powders and their visible light catalytic performances. RSC Adv 2022; 12:6328-6335. [PMID: 35424563 PMCID: PMC8981527 DOI: 10.1039/d1ra09256a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Accepted: 02/08/2022] [Indexed: 11/21/2022] Open
Abstract
The inefficiency of conventional photocatalytic treatment for removing rhodamine B is posing potential risks to ecological environments. Here, we construct a highly efficient photocatalyst consisting of Ag3PO4 and α-Fe2O3 hybrid powders for the treatment of rhodamine B. Ag3PO4 nanoparticles (nanoparticles, about 50 nm) are uniformly dispersed on the surface of α-Fe2O3 microcrystals (hexagonal sheet, about 1.5 μm). The Ag3PO4-deposited uniformity on the α-Fe2O3 surface first increased, then decreased on increasing the hybrid ratio of Ag3PO4 to α-Fe2O3. When the hybrid ratio of Ag3PO4 to α-Fe2O3 is 1 : 2, the distribution of Ag3PO4 particles on the sheet α-Fe2O3 is more uniform with excellent Ag3PO4/α-Fe2O3 interface performance. The catalytic degradation efficiency of hybrids with the introduction of Ag3PO4 nanoparticles on the α-Fe2O3 surface reached 95%. More importantly, the hybrid material exhibits superior photocatalytic stability. Ag3PO4/α-Fe2O3 hybrids have good reusability, and the photocatalytic efficiency could still reach 72% after four reuses. The excellent photocatalytic activity of the as-prepared hybrids can be attributed to the heterostructure between Ag3PO4 and α-Fe2O3, which can effectively inhibit the photoelectron-hole recombination and broaden the visible light response range.
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Affiliation(s)
- Ya Gao
- Center of Analysis and Testing, Hefei University Hefei 230601 China
| | - Haodong Ma
- School of Energy Materials and Chemical Engineering, Hefei University Hefei 230601 China
| | - Chengliang Han
- School of Energy Materials and Chemical Engineering, Hefei University Hefei 230601 China
| | - Chengmei Gui
- School of Energy Materials and Chemical Engineering, Hefei University Hefei 230601 China .,School of Chemistry and Chemical Engineering, Chaohu University Hefei 230009 China
| | - Chonghai Deng
- School of Energy Materials and Chemical Engineering, Hefei University Hefei 230601 China
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