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Zhan M, Hong Y, Fang Z, Qiu D. Magnetic recyclable visible light-driven Bi 2WO 6/Fe 3O 4/RGO for photocatalytic degradation of Microcystin-LR: Mechanism, pathway, and influencing factors. ENVIRONMENTAL RESEARCH 2024; 252:118885. [PMID: 38614200 DOI: 10.1016/j.envres.2024.118885] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/16/2023] [Revised: 03/16/2024] [Accepted: 04/04/2024] [Indexed: 04/15/2024]
Abstract
Photocatalysis was an attractive strategy that had potential to tackle the Microcystin-LR (MC-LR) contamination of aquatic ecosystems. Herein, magnetic photocatalyst Fe3O4/Bi2WO6/Reduced graphene oxide composites (Bi2WO6/Fe3O4/RGO) were employed to degrade MC-LR. The removal efficiency and kinetic constant of the optimized Bi2WO6/Fe3O4/RGO (Bi2WO6/Fe3O4-40%/RGO) was 1.8 and 2.3 times stronger than the pure Bi2WO6. The improved activity of Bi2WO6/Fe3O4-40%/RGO was corresponded to the expanded visible light adsorption ability and reduction of photogenerated carrier recombination efficiency through the integration of Bi2WO6 and Fe3O4-40%/RGO. The MC-LR removal efficiency exhibited a positive tendency to the initial density of algae cells, fulvic acid, and the concentration of MC-LR decreased. The existed anions (Cl-, CO3-2, NO3-, H2PO4-) reduced MC-LR removal efficiency of Bi2WO6/Fe3O4-40%/RGO. The Bi2WO6/Fe3O4-40%/RGO could degrade 79.3% of MC-LR at pH = 7 after 180 min reaction process. The trapping experiments and ESR tests confirmed that the h+, ∙OH, and ∙O2- played a significant role in MC-LR degradation. The LC-MS/MS result revealed the intermediates and possible degradation pathways.
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Affiliation(s)
- Mingming Zhan
- Beijing Key Lab for Source Control Technology of Water Pollution, College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China; Engineering Research Center for Water Pollution Source Control & Eco-remediation, College of Environmental Science and Engineering, Beijing Forestry University, Beijing, 100083, China
| | - Yu Hong
- Beijing Key Lab for Source Control Technology of Water Pollution, College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China; Engineering Research Center for Water Pollution Source Control & Eco-remediation, College of Environmental Science and Engineering, Beijing Forestry University, Beijing, 100083, China.
| | - Zhi Fang
- School of Materials Science and Engineering, Peking University, Beijing, 100871, China
| | - Daping Qiu
- School of Materials Science and Engineering, Peking University, Beijing, 100871, China
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Yi L, Jiang H, Ma Y, Zhu R, Zhang G, Ren Z. Highly efficient visible-light driven dye degradation via 0D BiVO 4 nanoparticles/2D BiOCl nanosheets p-n heterojunctions. CHEMOSPHERE 2024; 354:141658. [PMID: 38484995 DOI: 10.1016/j.chemosphere.2024.141658] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2023] [Revised: 01/01/2024] [Accepted: 03/05/2024] [Indexed: 03/25/2024]
Abstract
The construction of hybrid heterojunction photocatalysts is an effective strategy to improve the utilization of photogenerated carriers and photocatalytic activity. To enhance the separation distance of photogenerated carriers and accelerate the effective separation at the heterojunction of the interface, a unique 0D-2D hierarchical nanostructured p-n heterojunction was successfully fabricated in this work. BiOCl (BOC) nanosheets (p-type) were in situ grown on BiVO4 (BVO) nanoparticles (n-type) using the microemulsion-calcination method for highly efficient visible-light-driven organic dye degradation. Compared with pure BVO (the degradation rate of rhodamine B (RhB): about 32.0% in 55 min, the mineralization rate: 24.9% in 120 min), the RhB degradation rate can reach about 99.5% in 55 min and the mineralization rate of 62.1% in 120 min by utilizing BVO/25%BOC heterojunction photocatalyst under visible light irradiation. Various characterizations demonstrate that the formation of BVO/BOC p-n heterojunction greatly facilitates photogenerated carriers separation efficiency. Meanwhile, the results of the scavenging experiments and electron spin resonance tests indicate that ·O2- and h+ are the prominent active species for Rh B degradation. In addition, possible degradation pathways for Rh B were proposed using LC-MS tests. This work proves that building low dimensional p-n heterojunction photocatalysts is a promising strategy for developing photocatalysts with high efficiency.
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Affiliation(s)
- Lian Yi
- State Key Laboratory of Urban Water Resource and Environment, Shenzhen Key Laboratory of Organic Pollution Prevention and Control, School of Civil and Environmental Engineering, Harbin Institute of Technology Shenzhen, Shenzhen, 518055, PR China; Institute of Hydrogen and Fuel Cell, Harbin Institute of Technology Shenzhen, Shenzhen, 518055, PR China; International Joint Research Center for Persistent Toxic Substances, Harbin Institute of Technology Shenzhen, Shenzhen, 518055, PR China.
| | - Hongyi Jiang
- State Key Laboratory of Urban Water Resource and Environment, Shenzhen Key Laboratory of Organic Pollution Prevention and Control, School of Civil and Environmental Engineering, Harbin Institute of Technology Shenzhen, Shenzhen, 518055, PR China; Institute of Hydrogen and Fuel Cell, Harbin Institute of Technology Shenzhen, Shenzhen, 518055, PR China; International Joint Research Center for Persistent Toxic Substances, Harbin Institute of Technology Shenzhen, Shenzhen, 518055, PR China.
| | - Yueyong Ma
- State Key Laboratory of Urban Water Resource and Environment, Shenzhen Key Laboratory of Organic Pollution Prevention and Control, School of Civil and Environmental Engineering, Harbin Institute of Technology Shenzhen, Shenzhen, 518055, PR China; Institute of Hydrogen and Fuel Cell, Harbin Institute of Technology Shenzhen, Shenzhen, 518055, PR China; International Joint Research Center for Persistent Toxic Substances, Harbin Institute of Technology Shenzhen, Shenzhen, 518055, PR China.
| | - Rongshu Zhu
- State Key Laboratory of Urban Water Resource and Environment, Shenzhen Key Laboratory of Organic Pollution Prevention and Control, School of Civil and Environmental Engineering, Harbin Institute of Technology Shenzhen, Shenzhen, 518055, PR China; Institute of Hydrogen and Fuel Cell, Harbin Institute of Technology Shenzhen, Shenzhen, 518055, PR China; International Joint Research Center for Persistent Toxic Substances, Harbin Institute of Technology Shenzhen, Shenzhen, 518055, PR China.
| | - Guan Zhang
- State Key Laboratory of Urban Water Resource and Environment, Shenzhen Key Laboratory of Organic Pollution Prevention and Control, School of Civil and Environmental Engineering, Harbin Institute of Technology Shenzhen, Shenzhen, 518055, PR China.
| | - Zhaoyong Ren
- State Key Laboratory of Urban Water Resource and Environment, Shenzhen Key Laboratory of Organic Pollution Prevention and Control, School of Civil and Environmental Engineering, Harbin Institute of Technology Shenzhen, Shenzhen, 518055, PR China; Institute of Hydrogen and Fuel Cell, Harbin Institute of Technology Shenzhen, Shenzhen, 518055, PR China; International Joint Research Center for Persistent Toxic Substances, Harbin Institute of Technology Shenzhen, Shenzhen, 518055, PR China.
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Zhao ZA, Mao J, Lu C, Yang S, Qian Q, Chen Q, Xue H, Sun X, Yang MQ. Design and fabrication of self-suspending aluminum-plastic/semiconductor photocatalyst devices for solar energy conversion. J Environ Sci (China) 2024; 136:615-625. [PMID: 37923470 DOI: 10.1016/j.jes.2023.01.026] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2022] [Revised: 01/19/2023] [Accepted: 01/19/2023] [Indexed: 11/07/2023]
Abstract
The design and synthesis of self-suspending photocatalyst device with easy recyclability is important for practical application. Here, this work utilizes aluminum-plastic package waste as raw material to prepare an aluminum-plastic supported TiO2 (AP-TiO2) photocatalyst device through 3D printing design and surface deposition method. A series of characterizations were carried out to explore the structure, morphology and performance of the AP-TiO2 device. Under UV light illumination, the AP-TiO2-50 efficiently degrade 93.6% tetracycline hydrochloride (THC) after 4 hr, which increases by 8.3% compared with that of TiO2 powder suspension system with the same catalyst amount. Based on it, AP-ZnO, AP-CdS, AP-g-C3N4 and AP-Pt-TiO2 are also fabricated, and applied in photocatalytic degradation and hydrogen evolution, which all exhibit higher photoactivities than powder suspension systems. This work provides a new avenue for the fabrication of advanced recyclable photocatalyst device. Moreover, the work offers a novel sight for the high-value utilization of aluminum-plastic package waste, which has positive implications for environmental protection.
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Affiliation(s)
- Zhi-Ang Zhao
- College of Environmental and Resource Sciences, College of Carbon Neutral Modern Industry, Fujian Key Laboratory of Pollution Control and Resource Reuse, Fujian Normal University, Fuzhou 350007, China
| | - Jingyun Mao
- College of Environmental and Resource Sciences, College of Carbon Neutral Modern Industry, Fujian Key Laboratory of Pollution Control and Resource Reuse, Fujian Normal University, Fuzhou 350007, China
| | - Chengjing Lu
- College of Environmental and Resource Sciences, College of Carbon Neutral Modern Industry, Fujian Key Laboratory of Pollution Control and Resource Reuse, Fujian Normal University, Fuzhou 350007, China
| | - Shuangqiao Yang
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu 610065, China
| | - Qingrong Qian
- College of Environmental and Resource Sciences, College of Carbon Neutral Modern Industry, Fujian Key Laboratory of Pollution Control and Resource Reuse, Fujian Normal University, Fuzhou 350007, China
| | - Qinghua Chen
- College of Environmental and Resource Sciences, College of Carbon Neutral Modern Industry, Fujian Key Laboratory of Pollution Control and Resource Reuse, Fujian Normal University, Fuzhou 350007, China
| | - Hun Xue
- College of Environmental and Resource Sciences, College of Carbon Neutral Modern Industry, Fujian Key Laboratory of Pollution Control and Resource Reuse, Fujian Normal University, Fuzhou 350007, China.
| | - Xiaoli Sun
- College of Environmental and Resource Sciences, College of Carbon Neutral Modern Industry, Fujian Key Laboratory of Pollution Control and Resource Reuse, Fujian Normal University, Fuzhou 350007, China
| | - Min-Quan Yang
- College of Environmental and Resource Sciences, College of Carbon Neutral Modern Industry, Fujian Key Laboratory of Pollution Control and Resource Reuse, Fujian Normal University, Fuzhou 350007, China.
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Wu M, Zhang B, Wang H, Chen Y, Fan M, Dong L, Li B, Chen G. Exposed {110} facets of BiOBr anchored to marigold-like MnCo 2O 4 with abundant interfacial electron transfer bridges and efficient activation of peroxymonosulfate. J Colloid Interface Sci 2024; 653:867-878. [PMID: 37769365 DOI: 10.1016/j.jcis.2023.09.106] [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: 06/28/2023] [Revised: 08/26/2023] [Accepted: 09/16/2023] [Indexed: 09/30/2023]
Abstract
Precise charge transfer modification and efficient activation of peroxymonosulfate are effective methods for increasing photocatalytic efficiency. Here, BiOBr/MnCo2O4 photocatalysts with abundant Mn-Br bonds were generated by immobilizing the exposed {110} facets of BiOBr in the marigold-like MnCo2O4. The prepared BiOBr/MnCo2O4 retained the marigold-like morphology of MnCo2O4 while exhibiting good adsorption properties and interface contact effects. More importantly, the interfacial Mn-Br bond between MnCo2O4 and BiOBr functioned as charge transport bridges, allowing for a directional transfer channel and lowering the potential energy barrier for interfacial charge transfer. In addition, the exposure of the {110} facets exhibited more Mn atom-anchored sites for easy anchoring of BiOBr, significantly solving the stability problem of the bismuth material. Compared to MnCo2O4 + BiOBr, which did not form Mn-Br bonds, the MnCo2O4/BiOBr heterojunction had more efficient photocatalytic activity (1.3 times) and stability. This suggested that using electronic bridges for directional charge transfer was an efficient way to improve photocatalytic efficiency.
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Affiliation(s)
- Mingkun Wu
- Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, PR China; School of Chemistry and Chemical Engineering, Guizhou University, Guiyang 550025, PR China
| | - Bowen Zhang
- Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, PR China
| | - Haonan Wang
- Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, PR China
| | - Yao Chen
- Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, PR China
| | - Minguang Fan
- Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, PR China; Guangxi Colleges and Universities Key Laboratory of Applied Chemistry Technology and Resource Development, China.
| | - Lihui Dong
- Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, PR China; Guangxi Colleges and Universities Key Laboratory of Applied Chemistry Technology and Resource Development, China.
| | - Bin Li
- Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, PR China; Guangxi Colleges and Universities Key Laboratory of Applied Chemistry Technology and Resource Development, China
| | - Guoning Chen
- Guangxi Bossco Environmental Protection Technology Co., Ltd, Nanning 530007, China
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Wang Y, Liang S, Zuo C, Fang H, Dong G, Sheng X, Wu B, Zhang Y, Zhou Y. Construction of a heterojunction with fast charge transport channels for photocatalytic hydrogen evolution via a synergistic strategy of Co-doping and crystal plane modulation. NANOSCALE 2023; 15:5230-5240. [PMID: 36825559 DOI: 10.1039/d3nr00092c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Carrier spatial separation efficiency and active electron density are the key factors affecting photocatalytic hydrogen evolution activity. Heterojunction catalysts with fast charge separation and directed electron transport systems were successfully prepared by a synergistic modification strategy of transition metal (Co) doping and crystal plane modulation. The optimized electronic structure and enhanced reaction kinetics enabled unidirectional electron transfer. Photocatalytic results show that CdS(002)/Co-C3N4 exhibits remarkable hydrogen evolution activity (991.2 μmol h-1 g-1) in the absence of a co-catalyst, which is 37.0 and 3.4 times higher than that of C3N4 (26.8 μmol h-1 g-1) and Co-C3N4 (294.6 μmol h-1 g-1), respectively. Density functional theory (DFT) calculations indicate that the enhanced catalytic activity of CdS(002)/Co-C3N4 is attributed to the reduced electron-hole recombination rate and the increased electron density at the active site. This work provides a new idea for the design of photocatalysts with directed charge transport channels from the perspective of re-optimizing heterojunctions.
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Affiliation(s)
- Yanyun Wang
- School of Chemistry and Chemical Engineering, Southeast University, Jiangsu Optoelectronic Functional Materials and Engineering Laboratory, Nanjing 211189, P. R. China.
| | - Shuang Liang
- Department of Chemistry, Department of Chemical Engineering and Materials Science, University of Minnesota 55455-0431, USA
| | - Changjiang Zuo
- School of Chemistry and Chemical Engineering, Southeast University, Jiangsu Optoelectronic Functional Materials and Engineering Laboratory, Nanjing 211189, P. R. China.
| | - Hao Fang
- School of Chemistry and Chemical Engineering, Southeast University, Jiangsu Optoelectronic Functional Materials and Engineering Laboratory, Nanjing 211189, P. R. China.
| | - Guomeng Dong
- School of Chemistry and Chemical Engineering, Southeast University, Jiangsu Optoelectronic Functional Materials and Engineering Laboratory, Nanjing 211189, P. R. China.
| | - Xiaoli Sheng
- School of Chemistry and Chemical Engineering, Southeast University, Jiangsu Optoelectronic Functional Materials and Engineering Laboratory, Nanjing 211189, P. R. China.
| | - Bo Wu
- Multiscale Computational Materials Facility, Key Laboratory of Eco-Materials Advanced Technology, College of Materials Science and Engineering, Fuzhou University, Fuzhou 350100, China.
| | - Yiwei Zhang
- School of Chemistry and Chemical Engineering, Southeast University, Jiangsu Optoelectronic Functional Materials and Engineering Laboratory, Nanjing 211189, P. R. China.
| | - Yuming Zhou
- School of Chemistry and Chemical Engineering, Southeast University, Jiangsu Optoelectronic Functional Materials and Engineering Laboratory, Nanjing 211189, P. R. China.
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Huang L, Wang C, Yang Y, Wang Y, Li C, Xie Y, Zhao P, Fei J. A light-driven photoelectrochemical sensor for highly selective detection of hydroquinone based on type-II heterojunction formed by carbon nanotubes immobilized in 3D honeycomb CdS/SnS2. J Colloid Interface Sci 2023; 643:585-599. [PMID: 37003870 DOI: 10.1016/j.jcis.2023.03.141] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Revised: 03/19/2023] [Accepted: 03/22/2023] [Indexed: 03/28/2023]
Abstract
The ecological environment and public safety are seriously threatened by the typical phenolic contaminant hydroquinone (HQ). Here, using a straightforward physical mixing technique, we created an n-n heterojunction by uniformly immobilizing cadmium sulfide (CdS) nanoparticles on the surface of a three-dimensionally layered, flower-like structure made of tin sulfide (SnS2). Then, as photosensitizers, carbon nanotubes (CNTs) were added to the CdS/SnS2 complex to create a type-II heterostructure of CdS/SnS2/CNTs with synergistic effects. Subsequently, the detector HQ was bound to the modified photoelectrodes, which was accompanied by the hole oxidation of the bound HQ, leading to a significant increase in the photocurrent signal, thus allowing specific and sensitive detection of HQ. Under optimized detection conditions, the proposed photoelectrochemical sensor shows a wide detection range of 0.2 to 100 μM for HQ with a detection limit as low as 0.1 μM. The high accuracy of the sensor was demonstrated by comparison with the detection results of UV-vis spectrophotometry. In addition, the photoelectrochemical sensor exhibits good reproducibility, stability, selectivity, and specificity, providing a light-driven method to detect HQ.
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Zhang Y, Zhou B, Chen H, Yuan R. Heterogeneous photocatalytic oxidation for the removal of organophosphorus pollutants from aqueous solutions: A review. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 856:159048. [PMID: 36162567 DOI: 10.1016/j.scitotenv.2022.159048] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2022] [Revised: 08/07/2022] [Accepted: 09/22/2022] [Indexed: 06/16/2023]
Abstract
Organophosphorus pollutants (OPs), which are compounds containing carbon‑phosphorus bonds or phosphate derivatives containing organic groups, have received much attention from researchers because of their persistence in the aqueous environment for long periods of time and the threat they pose to human health. Heterogeneous photocatalysis has been widely applied to the removal of OPs from aqueous solutions due to its better removal effect and environmental friendliness. In this review, the removal of OPs from aqueous matrices by heterogeneous photocatalysis was presented. Herein, the application and the heterogeneous photocatalysis mechanism of OPs were described in detail, and the effects of catalyst types on degradation effect are discussed categorically. In particular, the heterojunction type photocatalyst has the most excellent effect. After that, the photocatalytic degradation pathways of several OPs were summarized, focusing on the organophosphorus pesticides and organophosphorus flame retardants, such as methyl parathion, dichlorvos, dimethoate and chlorpyrifos. The toxicity changes during degradation were evaluated, indicating that the photocatalytic process could effectively reduce the toxicity of OPs. Additionally, the effects of common water matrices on heterogeneous photocatalytic degradation of OPs were also presented. Finally, the challenges and perspectives of heterogeneous photocatalysis removal of OPs are summarized and presented.
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Affiliation(s)
- Yujie Zhang
- Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Beihai Zhou
- Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Huilun Chen
- Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Rongfang Yuan
- Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China.
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Wang Q, Li N, Tan M, Deng M, Yang G, Li Q, Du H. Novel dual Z-scheme Bi/BiOI-Bi2O3-C3N4 heterojunctions with synergistic boosted photocatalytic degradation of phenol. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.122733] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Wang H, Ren Q, Xiao L, Chen L, He Y, Yang L, Sun Y, Dong F. The spatially separated active sites for holes and electrons boost the radicals generation for toluene degradation. JOURNAL OF HAZARDOUS MATERIALS 2022; 437:129329. [PMID: 35716569 DOI: 10.1016/j.jhazmat.2022.129329] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2022] [Revised: 05/11/2022] [Accepted: 06/06/2022] [Indexed: 06/15/2023]
Abstract
Hydroxyl (⸱OH) and superoxide (⸱O2-) radicals are the main drivers for photocatalysis in toluene degradation, but their generation mechanisms are still ambiguous due to the lack of direct evidence. The spatially separated active sites for holes and electrons can help to clarify the dynamic process of radicals generation. By performing theoretical calculations, it is demonstrated that the spatially separated active sites for holes and electrons on the Bi2O2CO3 surface can be constructed by introducing oxygen vacancies in the [Bi2O2]2+ layer. H2O and O2 molecules can be better adsorbed and activated at hole and electron active sites, separately. Accordingly, the pristine and defective Bi2O2CO3 are prepared. The dynamic behavior of H2O and O2 molecules at the matching active sites is revealed, which indicates the efficient adsorption of reactants and the substantial production of radicals. Significantly, the specificity of the spatially separated holes and electrons active sites for ⸱OH and ⸱O2- radicals generation, respectively, is demonstrated by in situ EPR with the H2O vapor atmosphere. This work provides a design concept for unraveling reaction mechanisms to realize controllable radicals generation.
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Affiliation(s)
- Hong Wang
- Research Center for Environmental and Energy Catalysis, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 611731, China
| | - Qin Ren
- Research Center for Environmental and Energy Catalysis, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 611731, China
| | - Lei Xiao
- Research Center for Environmental and Energy Catalysis, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 611731, China
| | - Lvcun Chen
- Research Center for Environmental and Energy Catalysis, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 611731, China; Yangtze Delta Region Institute (Huzhou), University of Electronic Science and Technology of China, Huzhou 313000, China
| | - Ye He
- Research Center for Environmental and Energy Catalysis, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 611731, China
| | - Lin Yang
- Chongqing Key Laboratory of Catalysis and New Environmental Materials, College of Environment and Resources, Chongqing Technology and Business University, Chongqing 400067, China
| | - Yanjuan Sun
- Yangtze Delta Region Institute (Huzhou), University of Electronic Science and Technology of China, Huzhou 313000, China
| | - Fan Dong
- Research Center for Environmental and Energy Catalysis, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 611731, China; Yangtze Delta Region Institute (Huzhou), University of Electronic Science and Technology of China, Huzhou 313000, China.
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