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Jiang Y, Jiang Y, Xu Y, Sun X, Cheng S, Liu Y, Dou X, Yang Z. Ce-based three-dimensional mesoporous microspheres with Mn homogeneous incorporation for toluene oxidation. J Colloid Interface Sci 2024; 670:785-797. [PMID: 38796358 DOI: 10.1016/j.jcis.2024.04.128] [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: 01/14/2024] [Revised: 04/16/2024] [Accepted: 04/17/2024] [Indexed: 05/28/2024]
Abstract
Ce-based three-dimensional (3D) mesoporous microspheres with Mn homogeneous incorporation were synthesized. The CeMn-0.4, characterized by a Ce/Mn molar ratio of 6:4, demonstrated exceptional catalytic activity and stability. The formation of CeMn solid solution strengthened the Ce-Mn interaction, yielding higher concentrations of Ce3+ and Mn4+. Mn4+ initiated toluene preliminary activation owing to its robust oxidative properties, while Ce3+ contributed to oxygen vacancy generation, enhancing the activation of gaseous oxygen and lattice oxygen mobility. Integrating experiments and Density Functional Theory (DFT) calculations elucidated the oxygen reaction mechanisms. A portion of oxygen was converted into surface reactive oxygen species (Oads) that directly oxidized toluene. Additionally, the presence of oxygen vacancies promoted the participation of oxygen in toluene oxidation by converting it into lattice oxygen, which was crucial for the deep oxidation of toluene. Diffuse Reflectance Fourier Transform Infrared Spectroscopy (DRIFTS) indicated the accumulation of benzene-ring intermediates on the catalyst surface hindered continuous toluene oxidation. Thus, the abundant oxygen vacancies in CeMn-0.4 played a pivotal role in sustaining the oxidation process by bolstering the activation of gaseous oxygen and the mobility of lattice oxygen.
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Affiliation(s)
- Yinsheng Jiang
- College of New Energy, China University of Petroleum (East China), 66 West Changjiang Road, Qingdao 266580, China; Qingdao Engineering Research Center of Efficient and Clean Utilization of Fossil Energy, Qingdao 266580, China
| | - Ye Jiang
- College of New Energy, China University of Petroleum (East China), 66 West Changjiang Road, Qingdao 266580, China; Qingdao Engineering Research Center of Efficient and Clean Utilization of Fossil Energy, Qingdao 266580, China.
| | - Yichao Xu
- College of New Energy, China University of Petroleum (East China), 66 West Changjiang Road, Qingdao 266580, China; Qingdao Engineering Research Center of Efficient and Clean Utilization of Fossil Energy, Qingdao 266580, China
| | - Xin Sun
- College of New Energy, China University of Petroleum (East China), 66 West Changjiang Road, Qingdao 266580, China; Qingdao Engineering Research Center of Efficient and Clean Utilization of Fossil Energy, Qingdao 266580, China
| | - Siyuan Cheng
- College of New Energy, China University of Petroleum (East China), 66 West Changjiang Road, Qingdao 266580, China; Qingdao Engineering Research Center of Efficient and Clean Utilization of Fossil Energy, Qingdao 266580, China
| | - Yanan Liu
- College of New Energy, China University of Petroleum (East China), 66 West Changjiang Road, Qingdao 266580, China; Qingdao Engineering Research Center of Efficient and Clean Utilization of Fossil Energy, Qingdao 266580, China
| | - Xiao Dou
- College of New Energy, China University of Petroleum (East China), 66 West Changjiang Road, Qingdao 266580, China; Qingdao Engineering Research Center of Efficient and Clean Utilization of Fossil Energy, Qingdao 266580, China
| | - Zhengda Yang
- College of New Energy, China University of Petroleum (East China), 66 West Changjiang Road, Qingdao 266580, China; Qingdao Engineering Research Center of Efficient and Clean Utilization of Fossil Energy, Qingdao 266580, China
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2
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Yang B, Dong W, Zhu C, Huang X, Han Y, Zheng Y, Yan J, Zhuang Z, Yu Y. Reinforcing 2D Single-Crystal Bi 2O 2CO 3 with Additional Interlayer Carbonates by CO 2-Assisted Solid-to-Solid Phase Transition. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2401559. [PMID: 38659393 DOI: 10.1002/smll.202401559] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2024] [Revised: 04/01/2024] [Indexed: 04/26/2024]
Abstract
A facile gaseous CO2 mediated solid-to-solid transformation principle is adopted to insert additional CO3 2- anions into the thin single-crystal nanosheets of Bi2O2CO3, which is built of periodic arrays of intrinsic CO3 2- anions and (Bi2O2)2+ layers. The additional CO3 2- anions create abundant defects. The Bi2O2CO3 nanosheets with rich interlayer CO3 2- exhibit superior electronic properties and charge transfer kinetics than the pristine single-crystal 2D Bi2O2CO3 and display enhanced catalytic activity in photocatalytic CO2 reduction reaction and the photocatalytic oxidative degradation of organic pollutants. This work thus illustrates interlayer engineering as a flexible means to build layered 2D materials with excellent properties.
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Affiliation(s)
- Bixia Yang
- College of Materials Science and Engineering, Fuzhou University, New Campus, Minhou, Fujian, 350108, China
- Key Laboratory of Advanced Materials Technologies, Fuzhou University, Fuzhou, 350108, China
| | - Weilong Dong
- College of Materials Science and Engineering, Fuzhou University, New Campus, Minhou, Fujian, 350108, China
- Key Laboratory of Advanced Materials Technologies, Fuzhou University, Fuzhou, 350108, China
| | - Chongbing Zhu
- AQUA Worth (Suzhou) Environmental Protection Co.,Ltd, Suzhou, 215011, China
| | - Xinlian Huang
- College of Materials Science and Engineering, Fuzhou University, New Campus, Minhou, Fujian, 350108, China
- Key Laboratory of Advanced Materials Technologies, Fuzhou University, Fuzhou, 350108, China
| | - Yunhui Han
- College of Materials Science and Engineering, Fuzhou University, New Campus, Minhou, Fujian, 350108, China
- Key Laboratory of Advanced Materials Technologies, Fuzhou University, Fuzhou, 350108, China
| | - Yanting Zheng
- College of Materials Science and Engineering, Fuzhou University, New Campus, Minhou, Fujian, 350108, China
- Key Laboratory of Advanced Materials Technologies, Fuzhou University, Fuzhou, 350108, China
| | - Jiawei Yan
- College of Materials Science and Engineering, Fuzhou University, New Campus, Minhou, Fujian, 350108, China
- Key Laboratory of Advanced Materials Technologies, Fuzhou University, Fuzhou, 350108, China
| | - Zanyong Zhuang
- College of Materials Science and Engineering, Fuzhou University, New Campus, Minhou, Fujian, 350108, China
- Key Laboratory of Advanced Materials Technologies, Fuzhou University, Fuzhou, 350108, China
| | - Yan Yu
- College of Materials Science and Engineering, Fuzhou University, New Campus, Minhou, Fujian, 350108, China
- Key Laboratory of Advanced Materials Technologies, Fuzhou University, Fuzhou, 350108, China
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3
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Guo L, You S, Wu C, Liu F, Zhang R, Wang X. Interconnected Periodic Macroporous NaNbO 3 for High-Efficiency Solar-Driven Photocatalytic Hydrogen Evolution. Inorg Chem 2024; 63:11832-11841. [PMID: 38847596 DOI: 10.1021/acs.inorgchem.4c01632] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/25/2024]
Abstract
Highly ordered periodic macroporous structures have been extensively utilized to significantly enhance the photocatalytic activity. However, constructing 3D interconnected ordered porous ternary nanostructures with highly crystalline frameworks remains a formidable challenge. Here, we introduce the design and fabrication of 3D interconnected periodic macroporous NaNbO3 (PM NaNbO3) to effectively increase the density of surface-active sites and optimize the photogenerated carrier-transfer efficiency. By incorporating Pt as a cocatalyst, PM NaNbO3 exhibits an exceptional photocatalytic hydrogen generation rate of 10.04 mmol h-1 g-1, which is approximately six and five times higher than those of calcined NaNbO3 (C-NaNbO3) and hydrothermal NaNbO3 (H-NaNbO3), respectively. This outstanding performance can be attributed to the synergistic effects arising from its well-interconnected pore architecture, large surface area, enhanced light absorption capability, and improved charge carrier separation and transport efficiency. The findings presented in this study demonstrate an innovative approach toward designing hierarchically periodic macroporous materials for solar-driven hydrogen production.
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Affiliation(s)
- Lang Guo
- Key Laboratory of Jiangxi Province for Environment and Energy Catalysis, the School of Chemistry and Chemical Engineering, Nanchang University, 999 Xuefu Road, Nanchang 330031, China
| | - Shaoqiang You
- Key Laboratory of Jiangxi Province for Environment and Energy Catalysis, the School of Chemistry and Chemical Engineering, Nanchang University, 999 Xuefu Road, Nanchang 330031, China
| | - Chunmei Wu
- Key Laboratory of Jiangxi Province for Environment and Energy Catalysis, the School of Chemistry and Chemical Engineering, Nanchang University, 999 Xuefu Road, Nanchang 330031, China
| | - Feng Liu
- Key Laboratory of Jiangxi Province for Environment and Energy Catalysis, the School of Chemistry and Chemical Engineering, Nanchang University, 999 Xuefu Road, Nanchang 330031, China
| | - Rongbin Zhang
- Key Laboratory of Jiangxi Province for Environment and Energy Catalysis, the School 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, the School of Chemistry and Chemical Engineering, Nanchang University, 999 Xuefu Road, Nanchang 330031, China
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4
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Hou C, Cheng D, Zou S, Fu T, Wang J, Wang Y. A photo-active hollow covalent organic frameworks microcapsule imparts highly efficient photoredox catalysis of gaseous volatile organic compounds. J Colloid Interface Sci 2024; 662:903-913. [PMID: 38382374 DOI: 10.1016/j.jcis.2024.02.127] [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: 08/19/2023] [Revised: 01/17/2024] [Accepted: 02/15/2024] [Indexed: 02/23/2024]
Abstract
Covalent organic frameworks (COFs) with controlled porosity, high crystallinity, diverse designability and excellent stability are very attractive in metal-free heterogeneous photocatalysis of volatile organic compounds (VOCs) degradation. In order to construct the high optimal performance COFs under feasible and universal conditions, herein, the visible light-driven hollow COFTAPB-PDA (H-COFTAPB-PDA) microcapsule was designed by a facile dual-ligand regulated sacrificial template method. The H-COFTAPB-PDA microcapsule possesses improved surface area, high crystallinity, broad absorption range and high stability, which enables enhanced substrates and visible light adsorption, photogenerated electrons-holes separation and transfer, and facilitate the generation of reactive radicals. Importantly, it was found to be a highly efficient photocatalyst for toluene degradation under visible-light irradiation compared with the solid COFTAPB-PDA, and the degradation efficiency of toluene reached 91.8 % within 180 min with the conversion rate of CO2 was 68.9 %. Additionally, the H-COFTAPB-PDA presented good recyclability and long-term stability after multiple photocatalytic reuses. Furthermore, the active sites of H-COFTAPB-PDA in photocatalytic degradation of toluene was proposed by XPS and DFT calculations, and the degradation pathway and mechanism was proposed and analyzed. The result presented great prospect of morphologic design of hollow COFs in metal-free heterogeneous photocatalysis for VOCs degradation.
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Affiliation(s)
- Chen Hou
- College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science and Technology, Shaanxi Provincial Key Laboratory of Papermaking Technology and Specialty Paper Development, Key Laboratory of Paper Based Functional Materials of China National Light Industry, National Demonstration Center for Experimental Light Chemistry Engineering Education, Xi'an 710021, China.
| | - Daozhen Cheng
- College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science and Technology, Shaanxi Provincial Key Laboratory of Papermaking Technology and Specialty Paper Development, Key Laboratory of Paper Based Functional Materials of China National Light Industry, National Demonstration Center for Experimental Light Chemistry Engineering Education, Xi'an 710021, China
| | - Shengyang Zou
- College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science and Technology, Shaanxi Provincial Key Laboratory of Papermaking Technology and Specialty Paper Development, Key Laboratory of Paper Based Functional Materials of China National Light Industry, National Demonstration Center for Experimental Light Chemistry Engineering Education, Xi'an 710021, China
| | - Tao Fu
- College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China
| | - Jianzhi Wang
- Key Laboratory for Green Chemical Process of Ministry of Education, Hubei Key Laboratory for Novel Reactor and Green Chemistry Technology, Hubei Engineering Research Center for Advanced Fine Chemicals, School of Chemical Engineering and Pharmacy, Wuhan Institute of Technology, Wuhan 430073, China
| | - Yang Wang
- College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science and Technology, Shaanxi Provincial Key Laboratory of Papermaking Technology and Specialty Paper Development, Key Laboratory of Paper Based Functional Materials of China National Light Industry, National Demonstration Center for Experimental Light Chemistry Engineering Education, Xi'an 710021, China.
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5
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Dong H, Ji Y, Shao Q, Hu X, Zhang J, Yao X, Long C. Spatial interfacial heterojunctions of TiO 2 for photocatalytic degradation of toluene: Effects of interface amorphous region and oxygen vacancy. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 924:171521. [PMID: 38458445 DOI: 10.1016/j.scitotenv.2024.171521] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2023] [Revised: 02/27/2024] [Accepted: 03/04/2024] [Indexed: 03/10/2024]
Abstract
The catalytic activity of TiO2 is contingent upon its crystal structure and the optoelectronic properties associated with defects. In this study, a one-step method was used to synthesize TiO2 with a spatial interface of rutile/anatase phases, and a simple thermal annealing process was applied to optimize the amorphous regions and oxygen vacancies at the interface between the rutile and anatase phases of TiO2. High-resolution transmission electron microscopy (HRTEM) elucidates the evolution process of the amorphous domain at the interface, skillfully introducing oxygen vacancies at the heterojunction interface by modulating the amorphous domain. The obtained photocatalyst (TiO2-350 °C) after annealing exhibits an optimal interface structure, with its photocatalytic activity and stability in degrading toluene far superior to P25. Photocurrent and photoluminescence (PL) measurements affirm that the existence of interfacial oxygen vacancies heightens the efficiency of electron transfer at the interface, while surface oxygen vacancies significantly enhance the stability and mineralization rate of toluene degradation. The improved photocatalytic properties were attributed to the combined effects of surface/interface oxygen vacancies and spatial interface heterojunctions. The one-step synthesis method developed in this work provides a novel perspective on combining spatially interfaced anatase/rutile phases with surface/interfacial oxygen vacancies.
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Affiliation(s)
- Hao Dong
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China
| | - Yekun Ji
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China
| | - Qi Shao
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China
| | - Xueyu Hu
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China
| | - Jian Zhang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China; Quanzhou Institute for Environmental Protection Industry, Nanjing University, Beifeng Road, Quanzhou 362000, China
| | - Xiaohong Yao
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China; School of Environment and Ecology, Jiangsu Open University, 832 Yingtian Street, Nanjing 210019, China
| | - Chao Long
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China; Quanzhou Institute for Environmental Protection Industry, Nanjing University, Beifeng Road, Quanzhou 362000, China.
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6
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Wang Z, Wang K, Tao X, Feng P, Xu H, Zhu X, Zhang X, Chen J. Establishing an Ion-Sieving Separator by Depositing Oxygen-Deficient SiO x Layer for Stabilized Zinc Metal Anode. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2306308. [PMID: 37990392 DOI: 10.1002/smll.202306308] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2023] [Revised: 10/14/2023] [Indexed: 11/23/2023]
Abstract
Stable plating/stripping of Zn metal anode remains a great challenge owing to uncontrollable dendrite growth and side reactions. Ion-sieving separators is a unique and promising solution, that possess Zn2+ permeability and promote Zn2+ transport, can effectively alleviate the abovementioned problems. Ion-sieving on glass fiber separator by deposition of oxygen-deficient SiOx layer via active screen plasma technology is achieved. While having chemical composition similar to the glass fiber, the SiOx nanoparticles contain oxygen-rich vacancies that promoted dissociation of the adsorbed water and generation of the hydroxyl groups. The negatively-charged hydroxylated SiOx layer can repel SO4 2- and attract Zn2+, which can alleviate the side reactions. The strong interplay between hydroxyl groups and Zn2+ can boost Zn affinity and yield fast Zn2+ transport. Consequently, the SiOx-deposited GF separator enabled dendrite-free Zn deposition morphology, which displays lower overpotential of 18 mV and longer cycling life over 2000 h for Zn symmetric cell. Such a separator can also be easily scaled up to prepare the high-performance large-area (4 × 6 cm2) pouch Zn-based devices, showing remarkable flexibility and practicality.
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Affiliation(s)
- Zhen Wang
- Jiangsu Key Laboratory of Advanced Metallic Materials, School of Materials Science and Engineering, Southeast University, Nanjing, 211189, China
| | - Kehua Wang
- Jiangsu Key Laboratory of Advanced Metallic Materials, School of Materials Science and Engineering, Southeast University, Nanjing, 211189, China
| | - Xiao Tao
- Jiangsu Key Laboratory of Advanced Metallic Materials, School of Materials Science and Engineering, Southeast University, Nanjing, 211189, China
| | - Pan Feng
- Jiangsu Key Laboratory of Advanced Metallic Materials, School of Materials Science and Engineering, Southeast University, Nanjing, 211189, China
| | - Hui Xu
- Research School of Polymeric Materials, School of Material Science and Engineering, Jiangsu University, Zhenjiang, 212013, China
| | - Xiao Zhu
- Jiangsu Key Laboratory of Advanced Metallic Materials, School of Materials Science and Engineering, Southeast University, Nanjing, 211189, China
| | - Xiyu Zhang
- Jiangsu Key Laboratory of Advanced Metallic Materials, School of Materials Science and Engineering, Southeast University, Nanjing, 211189, China
| | - Jian Chen
- Jiangsu Key Laboratory of Advanced Metallic Materials, School of Materials Science and Engineering, Southeast University, Nanjing, 211189, China
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7
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Lei B, Cui W, Sheng J, Zhong F, Dong F. Halogen-Site Regulation in Cs 3Bi 2X 9 Quantum Dots for Efficient and Selective Oxidation of Benzyl Alcohol Driven by Solar Light. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2308088. [PMID: 38009494 DOI: 10.1002/smll.202308088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2023] [Revised: 10/13/2023] [Indexed: 11/29/2023]
Abstract
Sluggish charge kinetics and low selectivity limit the solar-driven selective organic transformations under mild conditions. Herein, an efficient strategy of halogen-site regulation, based on the precise control of charge transfer and molecule activation by rational design of Cs3Bi2X9 quantum dots photocatalysts, is proposed to achieve both high selectivity and yield of benzyl-alcohol oxidation. In situ PL spectroscopy study reveals that the Bi─Br bonds formed in the form of Br-associated coordination can enhance the separation and transfer of photoexcited carriers during the practical reaction. As the active center, the exclusive Bi─Br covalence can benefit the benzyl-alcohol activation for producing carbon-centered radicals. As a result, the Cs3Bi2Br9 with this atomic coordination achieves a conversion ratio of 97.9% for benzyl alcohol and selectivity of 99.6% for aldehydes, which are 56.9- and 1.54-fold higher than that of Cs3Bi2Cl9. Combined with quasi-in situ EPR, in situ ATR-FTIR spectra, and DFT calculation, the conversion of C6H5-CH2OH to C6H5-CH2* at Br-related coordination is revealed to be a determining step, which can be accelerated via halogen-site regulation for enhancing selectivity and photocatalytic efficiency. The mechanistic insights of this research elucidate how halogen-site regulation in favor of charge transfer and molecule activation toward efficient and selective oxidation of benzyl alcohol.
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Affiliation(s)
- Ben Lei
- Research Center for Carbon-Neutral Environmental & Energy Technology, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, 611731, P. R. China
| | - Wen Cui
- College of Resources and Environmental Engineering, Guizhou University, Guiyang, 550025, China
| | - Jianping Sheng
- Research Center for Carbon-Neutral Environmental & Energy Technology, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, 611731, P. R. China
| | - Fengyi Zhong
- Research Center for Carbon-Neutral Environmental & Energy Technology, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, 611731, P. R. China
| | - Fan Dong
- Research Center for Carbon-Neutral Environmental & Energy Technology, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, 611731, P. R. China
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8
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Li Y, Chen B, Liu L, Zhu B, Zhang D. Water-Resistance-Based S-Scheme Heterojunction for Deep Mineralization of Toluene. Angew Chem Int Ed Engl 2024; 63:e202319432. [PMID: 38233346 DOI: 10.1002/anie.202319432] [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: 12/16/2023] [Revised: 01/13/2024] [Accepted: 01/16/2024] [Indexed: 01/19/2024]
Abstract
Deep mineralization of low concentration toluene (C7 H8 ) is one of the most significant but challenging reactions in photocatalysis. It is generally assumed that hydroxyl radicals (⋅OH) as the main reactive species contribute to the enhanced photoactivity, however, it remains ambiguous at this stage. Herein, a S-scheme ZnSn(OH)6 -based heterojunction with AlOOH as water resistant surface layer is in situ designed for tuning the free radical species and achieving deep mineralization of C7 H8 . By employing a combination of in situ DRIFTS and materials characterization techniques, we discover that the dominant intermediates such as benzaldehyde and benzoic acid instead of toxic phenols are formed under the action of holes (h+ ) and superoxide radicals (⋅O2 - ). These dominant intermediates turn out to greatly decrease the ring-opening reaction barrier. This study offers new possibilities for rationally tailoring the active species and thus directionally producing dominant intermediates via designing water resistant surface layer.
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Affiliation(s)
- Yuhan Li
- Engineering Research Center for Waste Oil Recovery Technology and Equipment, Ministry of Education, Chongqing Key Laboratory of Catalysis and New Environmental Materials, Chongqing Technology and Business University, Chongqing, 400067, P. R. China
| | - Bangfu Chen
- Engineering Research Center for Waste Oil Recovery Technology and Equipment, Ministry of Education, Chongqing Key Laboratory of Catalysis and New Environmental Materials, Chongqing Technology and Business University, Chongqing, 400067, P. R. China
| | - Li Liu
- Engineering Research Center for Waste Oil Recovery Technology and Equipment, Ministry of Education, Chongqing Key Laboratory of Catalysis and New Environmental Materials, Chongqing Technology and Business University, Chongqing, 400067, P. R. China
| | - Bicheng Zhu
- Laboratory of Solar Fuel, Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan, 430078, P. R. China
| | - Dieqing Zhang
- The Education Ministry Key Lab of Resource Chemistry, Joint International Research Laboratory of Resource Chemistry of Ministry of Education, Shanghai Key Laboratory of Rare Earth Functional Materials, and Shanghai Frontiers Science Center of Biomimetic Catalysis, Shanghai Normal University, Shanghai, 200234, P. R. China
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9
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Liu B, Zhang B, Liu B, Hu Z, Dai W, Zhang J, Feng F, Lan B, Zhang T, Huang H. Surface Hydroxyl and Oxygen Vacancies Engineering in ZnSnAl LDH: Synergistic Promotion of Photocatalytic Oxidation of Aromatic VOCs. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2024; 58:4404-4414. [PMID: 38310571 DOI: 10.1021/acs.est.3c08860] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2024]
Abstract
Photocatalytic oxidation has gained great interest in environmental remediation, but it is still limited by its low efficiency and catalytic deactivation in the degradation of aromatic VOCs. In this study, we concurrently regulated the surface hydroxyl and oxygen vacancies by introducing Al into ZnSn layered double hydroxide (LDH). The presence of distorted Al species induced local charge redistribution, leading to the remarkable formation of oxygen vacancies. These oxygen vacancies subsequently increased the amount of surface hydroxyl and elongated its bond length. The synergistic effects of surface hydroxyl and oxygen vacancies greatly enhanced reactant adsorption-activation and facilitated charge transfer to generate •OH, •O2-, and 1O2, resulting in highly efficient oxidation and ring-opening of various aromatic VOCs. Compared with commercial TiO2, the optimized ZnSnAl-50 catalyst exhibited about 2-fold activity for the toluene and styrene degradation and 10-fold activity for the chlorobenzene degradation. Moreover, ZnSnAl-50 demonstrated exceptional stability in the photocatalytic oxidation of toluene under a wide humidity range of 0-75%. This work marvelously improves the photocatalytic efficiency, stability, and adaptability through a novel strategy of surface hydroxyl and oxygen vacancies engineering.
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Affiliation(s)
- Biyuan Liu
- School of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou 510006, P. R. China
- School of Chemistry and Environment, Jiaying University, Meizhou 514015, P. R. China
| | - Boge Zhang
- School of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou 510006, P. R. China
| | - Biying Liu
- School of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou 510006, P. R. China
| | - Zhuofeng Hu
- School of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou 510006, P. R. China
| | - Wenjing Dai
- School of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou 510006, P. R. China
| | - Jiarui Zhang
- School of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou 510006, P. R. China
| | - Fada Feng
- School of Chemistry and Environment, Jiaying University, Meizhou 514015, P. R. China
| | - Bang Lan
- School of Chemistry and Environment, Jiaying University, Meizhou 514015, P. R. China
| | - Tao Zhang
- School of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou 510006, P. R. China
| | - Haibao Huang
- School of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou 510006, P. R. China
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10
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Chengula PJ, Charles H, Pawar RC, Lee CS. Current trends on dry photocatalytic oxidation technology for BTX removal: Viable light sources and highly efficient photocatalysts. CHEMOSPHERE 2024; 351:141197. [PMID: 38244866 DOI: 10.1016/j.chemosphere.2024.141197] [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: 09/15/2023] [Revised: 12/27/2023] [Accepted: 01/10/2024] [Indexed: 01/22/2024]
Abstract
One of the main gaseous pollutants released by chemical production industries are benzene, toluene and xylene (BTX). These dangerous gases require immediate technology to combat them, as they put the health of living organisms at risk. The development of heterogeneous photocatalytic oxidation technology offers several viewpoints, particularly in gaseous-phase decontamination without an additional supply of oxidants in air at atmospheric pressure. However, difficulties such as low quantum efficiency, ability to absorb visible light, affinity towards CO2 and H2O synthesis, and low stability continue to limit its practical use. This review presents recent advances in dry-phase heterogeneous photodegradation as an advanced technology for the practical removal of BTX molecules. This review also examines the impact of low-cost light sources, the roles of the active sites of photocatalysts, and the feasible concentration range of BTX molecules. Numerous studies have demonstrated a significant improvement in the efficiency of the photodegradation of volatile organic compounds by enhancing the photocatalytic reactor system and other factors, such as humidity, temperature, and flow rate. The mechanism for BTX photodegradation based on density functional theory (DFT), electron paramagnetic resonance (EPR) and diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) investigations is also discussed. Finally, the present research complications and anticipated future developments in the field of heterogeneous photocatalytic oxidation technology are discussed.
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Affiliation(s)
- Plassidius J Chengula
- Department of Materials and Chemical Engineering, Hanyang University, Ansan, South Korea
| | - Hazina Charles
- Department of Materials and Chemical Engineering, Hanyang University, Ansan, South Korea
| | - Rajendra C Pawar
- Department of Physics, Central University of Rajasthan, Ajmer, Rajasthan, 305817, India
| | - Caroline Sunyong Lee
- Department of Materials and Chemical Engineering, Hanyang University, Ansan, South Korea.
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11
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Wang S, Song D, Liao L, Li M, Li Z, Zhou W. Surface and interface engineering of BiOCl nanomaterials and their photocatalytic applications. Adv Colloid Interface Sci 2024; 324:103088. [PMID: 38244532 DOI: 10.1016/j.cis.2024.103088] [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: 09/17/2023] [Revised: 11/29/2023] [Accepted: 01/07/2024] [Indexed: 01/22/2024]
Abstract
BiOCl materials have received much attention because of their unique optical and electrical properties. Still, their unsatisfactory catalytic performance has been troubling researchers, limiting the application of BiOCl-based photocatalysts. Therefore, many researchers have studied the adjustment of BiOCl-based materials to enhance photocatalytic efficiency. This review focuses on surface and interface engineering strategies for boosting the photocatalytic performance of BiOCl-based nanomaterials, including forming oxygen vacancy defects, constructing metal/BiOCl, and the fabrication of semiconductor/BiOCl nanocomposites. The photocatalytic applications of the above composites are also concluded in photodegradation of aqueous pollutants, photocatalytic NO removal, photo-induced H2 production, and CO2 reduction. Special emphasis has been given to the modification methods of BiOCl and photocatalytic mechanisms to provide a more detailed understanding for researchers in the fields of energy conversion and materials sciences.
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Affiliation(s)
- Shijie Wang
- Shandong Provincial Key Laboratory of Molecular Engineering School of Chemistry and Chemical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong 250353, PR China
| | - Dongxue Song
- School of Chemistry and Materials Science, Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China, Heilongjiang University, Harbin 150080, PR China
| | - Lijun Liao
- Shandong Provincial Key Laboratory of Molecular Engineering School of Chemistry and Chemical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong 250353, PR China.
| | - Mingxia Li
- School of Chemistry and Materials Science, Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China, Heilongjiang University, Harbin 150080, PR China.
| | - Zhenzi Li
- Shandong Provincial Key Laboratory of Molecular Engineering School of Chemistry and Chemical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong 250353, PR China.
| | - Wei Zhou
- Shandong Provincial Key Laboratory of Molecular Engineering School of Chemistry and Chemical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong 250353, PR China.
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12
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Zhang L, Zhong L, Yu P, Li H, Zhou Z, Tong Q, Wan H, Dong L. Size Effect of Platinum Nanoparticles over Platinum-Manganese Oxide on the Low-Temperature Oxidation of Toluene. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:13620-13629. [PMID: 37702778 DOI: 10.1021/acs.langmuir.3c01734] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/14/2023]
Abstract
The effect of size of Pt nanoparticles has an important influence on the performance of supported Pt-based catalysts for the elimination of toluene. Herein, uniform Pt nanoparticles with average sizes of 1.5, 2.0, 2.5, 2.9, and 3.6 nm were obtained and supported on manganese oxide octahedral molecular sieves (OMS-2), and their catalytic performances for toluene oxidation were evaluated. Benefiting from the moderate interfacial interaction between nanoparticles and manganese oxide support, Pt/OMS-2-3 with the Pt particle size of 3.0 nm showed the best catalytic performance owing to the highest content of Pt2+ species. It also facilitates the formation of more abundant Mnδ+ (Mn2+ and Mn3+) and oxygen vacancies than that of the other sizes of the OMS-2-supported Pt nanoparticles, which can be filled by a large amount of adsorbed oxygen and converted into reactive oxygen species. We further showed that the resulting surface synergetic oxygen vacancies (Pt2+-Ov-Mnδ+) play a decisive part in catalyzing the complete oxidation of toluene. The result will provide new insights for designing efficient Pt-based catalysts for deep purification of toluene.
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Affiliation(s)
- Lixin Zhang
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Center of Modern Analysis, Jiangsu Key Laboratory of Vehicle Emissions Control, Nanjing University, Nanjing 210023, P. R. China
| | - Linjun Zhong
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Center of Modern Analysis, Jiangsu Key Laboratory of Vehicle Emissions Control, Nanjing University, Nanjing 210023, P. R. China
| | - Pinhua Yu
- Research Institute of Sinopec Nanjing Chemical Industry Co. Ltd., Nanjing 210048, P. R. China
| | - Haitao Li
- Department of Science and Technology Development, Sinopec Nanjing Chemical Industry Co. Ltd., Nanjing 210048, P. R. China
| | - Zhou Zhou
- College of Environmental Science and Engineering, Yangzhou University, Yangzhou 225127, Jiangsu, P. R. China
| | - Qing Tong
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Center of Modern Analysis, Jiangsu Key Laboratory of Vehicle Emissions Control, Nanjing University, Nanjing 210023, P. R. China
| | - Haiqin Wan
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Center of Modern Analysis, Jiangsu Key Laboratory of Vehicle Emissions Control, Nanjing University, Nanjing 210023, P. R. China
| | - Lin Dong
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Center of Modern Analysis, Jiangsu Key Laboratory of Vehicle Emissions Control, Nanjing University, Nanjing 210023, P. R. China
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13
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Yang W, Li X, Chen R, Shen S, Xiao L, Li J, Dong F. Efficient purification of a nitrate and chlorate mixture in water via photoredox activated intermediate coupling-decoupling pathway. JOURNAL OF HAZARDOUS MATERIALS 2023; 458:131964. [PMID: 37399724 DOI: 10.1016/j.jhazmat.2023.131964] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Revised: 06/13/2023] [Accepted: 06/27/2023] [Indexed: 07/05/2023]
Abstract
Nitrate (NO3-) is a widespread contaminant that threatens human health and ecological safety. Meanwhile, the disinfection byproducts chlorate (ClO3-) is generated inevitably in conventional wastewater treatment. Therefore, the contaminants mixture of NO3- and ClO3- are universal in common emission units. Photocatalysis technology is a feasible approach for the synergistic abatement of contaminant mixture, where matching suitable oxidation reactions is a potential strategy to improve the photocatalytic reduction reactions. Herein, formate (HCOOH) oxidation is introduced to facilitate the photocatalytic reduction of the NO3- and ClO3- mixture. As a result, high purification efficiency of NO3- and ClO3- mixture are achieved, evidenced by 84.6% e--dependent removal of the mixture at a reaction time of 30 min, with 94.5% N2 selectivity and 100% Cl- selectivity, respectively. Specifically, by the close combination of in-situ characterizations and theoretical calculations, the detailed reaction mechanism is revealed, in which the intermediate coupling-decoupling route from NO3- reduction and HCOOH oxidation is established by the chlorate-induced photoredox activation, leading to the significantly enhanced efficiency for the wastewater mixture purification. The practical application of this pathway is established for simulated wastewater to show its wide applicability. This work provides new insights into photoredox catalysis technology for its environmental application.
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Affiliation(s)
- Weiping Yang
- Research Center for Carbon-Neutral Environmental & Energy Technology, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 611731, China
| | - Xin Li
- Research Center for Carbon-Neutral Environmental & Energy Technology, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 611731, China
| | - Ruimin Chen
- Research Center for Carbon-Neutral Environmental & Energy Technology, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 611731, China
| | - Shujie Shen
- Research Center for Carbon-Neutral Environmental & Energy Technology, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 611731, China
| | - Lei Xiao
- Research Center for Carbon-Neutral Environmental & Energy Technology, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 611731, China
| | - Jieyuan Li
- Research Center for Carbon-Neutral Environmental & Energy Technology, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 611731, China.
| | - Fan Dong
- Research Center for Carbon-Neutral Environmental & Energy Technology, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 611731, China
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14
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Kumar N, Kumari M, Ismael M, Tahir M, Sharma RK, Kumari K, Koduru JR, Singh P. Graphitic carbon nitride (g-C 3N 4)-assisted materials for the detection and remediation of hazardous gases and VOCs. ENVIRONMENTAL RESEARCH 2023; 231:116149. [PMID: 37209982 DOI: 10.1016/j.envres.2023.116149] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2023] [Revised: 03/22/2023] [Accepted: 05/13/2023] [Indexed: 05/22/2023]
Abstract
Graphitic carbon nitride (g-C3N4)-based materials are attracting attention for their unique properties, such as low-cost, chemical stability, facile synthesis, adjustable electronic structure, and optical properties. These facilitate the use of g-C3N4 to design better photocatalytic and sensing materials. Environmental pollution by hazardous gases and volatile organic compounds (VOCs) can be monitored and controlled using eco-friendly g-C3N4- photocatalysts. Firstly, this review introduces the structure, optical and electronic properties of C3N4 and C3N4 assisted materials, followed by various synthesis strategies. In continuation, binary and ternary nanocomposites of C3N4 with metal oxides, sulfides, noble metals, and graphene are elaborated. g-C3N4/metal oxide composites exhibited better charge separation that leads to enhancement in photocatalytic properties. g-C3N4/noble metal composites possess higher photocatalytic activities due to the surface plasmon effects of metals. Ternary composites by the presence of dual heterojunctions improve properties of g-C3N4 for enhanced photocatalytic application. In the later part, we have summarised the application of g-C3N4 and its assisted materials for sensing toxic gases and VOCs and decontaminating NOx and VOCs by photocatalysis. Composites of g-C3N4 with metal and metal oxide give comparatively better results. This review is expected to bring a new sketch for developing g-C3N4-based photocatalysts and sensors with practical applications.
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Affiliation(s)
- Naveen Kumar
- Department of Chemistry, Maharshi Dayanand University, Rohtak, 124001, India.
| | - Monika Kumari
- Department of Chemistry, Maharshi Dayanand University, Rohtak, 124001, India
| | - Mohammed Ismael
- Electrical energy storage system, Gottfried Wilhelm Leibniz Universität Hannover, Welfengarten 1, 30167, Hannover, Germany
| | - Muhammad Tahir
- Chemical and Petroleum Engineering Department, UAE University, P.O. Box 15551, Al Ain, United Arab Emirates
| | | | - Kavitha Kumari
- Baba Mastnath University, Asthal Bohar, Rohtak, 124001, India
| | - Janardhan Reddy Koduru
- Department of Environmental Engineering, Kwangwoon University, Seoul, 01897, South Korea
| | - Pardeep Singh
- School of Advanced Chemical Sciences, Shoolini University, Solan, Himachal Pradesh, 173212, India
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15
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Chang F, Zhao S, Lei Y, Wang X, Dong F, Zhu G, Kong Y. Jointly augmented photocatalytic NO removal by S-scheme Bi 12SiO 20/Ag 2MoO 4 heterojunctions with surface oxygen vacancies. J Colloid Interface Sci 2023; 649:713-723. [PMID: 37385036 DOI: 10.1016/j.jcis.2023.06.168] [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: 05/04/2023] [Revised: 06/13/2023] [Accepted: 06/24/2023] [Indexed: 07/01/2023]
Abstract
The deep oxidation of NO molecules to NO3- species with the avoidance of toxic NO2 generation is a big and challengeable concern, which can be solved by the rational design and construction of catalytic systems with satisfactory structural and optical features. For such, in this investigation binary composites Bi12SiO20/Ag2MoO4 (BSO-XAM) were fabricated through a facile mechanical ball-milling route. From microstructural and morphological analyses, heterojunction structures with surface oxygen vacancies (OVs) were simultaneously created, contributing to the enhanced visible-light absorption, reinforced migration and separation of charge carries, and further boosted generation of reactive species such as superoxide radicals and singlet oxygen. Based on the density-functional theory (DFT) calculations, surface OVs induced the strengthened adsorption and activation of O2, H2O, and NO molecules and oxidation of NO to NO2, while heterojunction structures were beneficial for the continuous oxidation of NO2 to NO3- species. Thus, the heterojunction structures with surface OVs synergistically guaranteed the augmented photocatalytic NO removal and constrained NO2 generation of BSO-XAM through a typical S-scheme model. This study may provide scientific guidances for the photocatalytic control and removal of NO at ppb level by Bi12SiO20-based composites through the mechanical ball-milling protocol.
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Affiliation(s)
- Fei Chang
- School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, PR China
| | - Shanshan Zhao
- School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, PR China
| | - Yibo Lei
- School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, PR China
| | - Xiaomeng Wang
- School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, PR China
| | - Fan Dong
- Research Center for Environmental Science & Technology, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 611731, PR China
| | - Gangqiang Zhu
- School of Physics and Information Technology, Shaanxi Normal University, Xi' an 710062, PR China.
| | - Yuan Kong
- Hefei National Laboratory for Physical Sciences at the Microscale & Synergetic Innovation Center of Quantum Information and Quantum Physics CAS Center for Excellence in Nanoscience and Department of Chemical Physics, Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education Institutes, University of Science and Technology of China, Hefei 230026, PR China.
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16
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Zhao J, Li C, Yu Q, Zhu Y, Liu X, Li S, Liang C, Zhang Y, Huang L, Yang K, Zhang Z, Zhai Y. Interface engineering of Mn 3O 4/Co 3O 4 S-scheme heterojunctions to enhance the photothermal catalytic degradation of toluene. JOURNAL OF HAZARDOUS MATERIALS 2023; 452:131249. [PMID: 36966624 DOI: 10.1016/j.jhazmat.2023.131249] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Revised: 03/10/2023] [Accepted: 03/19/2023] [Indexed: 06/18/2023]
Abstract
Transition metal oxides have high photothermal conversion capacity and excellent thermal catalytic activity, and their photothermal catalytic ability can be further improved by reasonably inducing the photoelectric effect of semiconductors. Herein, Mn3O4/Co3O4 composites with S-scheme heterojunctions were fabricated for photothermal catalytic degradation of toluene under ultraviolet-visible (UV-Vis) light irradiation. The distinct hetero-interface of Mn3O4/Co3O4 effectively increases the specific surface area and promotes the formation of oxygen vacancies, thus facilitating the generation of reactive oxygen species and migration of surface lattice oxygen. Theoretical calculations and photoelectrochemical characterization demonstrate the existence of a built-in electric field and energy band bending at the interface of Mn3O4/Co3O4, which optimizes the photogenerated carriers' transfer path and retains a higher redox potential. Under UV-Vis light irradiation, the rapid transfer of electrons between interfaces promotes the generation of more reactive radicals, and the Mn3O4/Co3O4 shows a substantial improvement in the removal efficiency of toluene (74.7%) compared to single metal oxides (53.3% and 47.5%). Moreover, the possible photothermal catalytic reaction pathways of toluene over Mn3O4/Co3O4 were also investigated by in situ DRIFTS. The present work offers valuable guidance toward the design and fabrication of efficient narrow-band semiconductor heterojunction photothermal catalysts and provides deeper insights into the mechanism of photothermal catalytic degradation of toluene.
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Affiliation(s)
- Jungang Zhao
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control, Hunan University, Ministry of Education, Changsha 410082, PR China
| | - Caiting Li
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control, Hunan University, Ministry of Education, Changsha 410082, PR China.
| | - Qi Yu
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control, Hunan University, Ministry of Education, Changsha 410082, PR China
| | - Youcai Zhu
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control, Hunan University, Ministry of Education, Changsha 410082, PR China
| | - Xuan Liu
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control, Hunan University, Ministry of Education, Changsha 410082, PR China
| | - Shanhong Li
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control, Hunan University, Ministry of Education, Changsha 410082, PR China
| | - Caixia Liang
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control, Hunan University, Ministry of Education, Changsha 410082, PR China
| | - Ying Zhang
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control, Hunan University, Ministry of Education, Changsha 410082, PR China
| | - Le Huang
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control, Hunan University, Ministry of Education, Changsha 410082, PR China
| | - Kuang Yang
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control, Hunan University, Ministry of Education, Changsha 410082, PR China
| | - Ziang Zhang
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control, Hunan University, Ministry of Education, Changsha 410082, PR China
| | - Yunbo Zhai
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control, Hunan University, Ministry of Education, Changsha 410082, PR China
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17
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Choi Y, Govindan M, Kim D. Semi-solid electrolyte with layered heterometallic low-valent electron-mediator enabling indirect destruction of gaseous toluene. CHEMOSPHERE 2023; 313:137590. [PMID: 36535505 DOI: 10.1016/j.chemosphere.2022.137590] [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: 11/18/2022] [Revised: 12/15/2022] [Accepted: 12/16/2022] [Indexed: 06/17/2023]
Abstract
The electrochemical degradation of air pollutants, particularly volatile organic compounds (VOCs), at their gaseous state is a promising method. However, it remains at an infant stage due to sluggish solid-gas electron transfers at room temperature. We established a triphase reaction condition using a semi-solid electrolyte layer between the electrode and membrane to enhance the electron transfer at room temperature. A polyvinyl alcohol (PVA) gel layer was inserted between a bimetallic layered CuNi(CN)4 complex coated Cu foam electrode (TCNi-Cu) and Nafion 324 membrane for the degradation of gaseous toluene. The cyclic voltammetry of TCNi-Cu using a sodium hydroxide-coated copper mesh electrode at a triphase showed Cu1+ and Ni1+ stabilization at -0.7 and -0.9 V, respectively, which was similar to the liquid phase electron transfer behavior. The degradation capacity of gaseous toluene without using electrogenerated TCNi-Cu + PVA gel was 0.54 mg cm2 min-1, whereas that of TCNi-Cu + PVA gel layers was 1.17 mg cm-2min-1, which revealed the mediation effect at a triphase condition. Toluene was converted into oxygen-containing products, such as butanol, propanol, and acetone (without reduction products), which revealed that indirect oxidation occurred at the cathode using an in-situ generated oxidant, such as OH˙ radical. As an electron-mediator, Cu1+ was used to form oxidants for the degradation of toluene at -0.7 V. The toluene removal rate reached 1.4 μmol h-1, with an energy efficiency of 0.15 Wh L-1. This study is the first attempt to describe a liquid-electrolyte-free cathodic half-cell in electrochemical application to VOCs degradation, highlighting the electron transfer at room temperature.
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Affiliation(s)
- Youngyu Choi
- Department of Environmental Engineering, Seoul National University of Science and Technology, Seoul, 01811, Republic of Korea
| | - Muthuraman Govindan
- Department of Environmental Engineering, Seoul National University of Science and Technology, Seoul, 01811, Republic of Korea
| | - Daekeun Kim
- Department of Environmental Engineering, Seoul National University of Science and Technology, Seoul, 01811, Republic of Korea.
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18
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Prabhakar Vattikuti SV, Zeng J, Ramaraghavulu R, Shim J, Mauger A, Julien CM. High-Throughput Strategies for the Design, Discovery, and Analysis of Bismuth-Based Photocatalysts. Int J Mol Sci 2022; 24:663. [PMID: 36614112 PMCID: PMC9820977 DOI: 10.3390/ijms24010663] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2022] [Revised: 12/20/2022] [Accepted: 12/27/2022] [Indexed: 01/03/2023] Open
Abstract
Bismuth-based nanostructures (BBNs) have attracted extensive research attention due to their tremendous development in the fields of photocatalysis and electro-catalysis. BBNs are considered potential photocatalysts because of their easily tuned electronic properties by changing their chemical composition, surface morphology, crystal structure, and band energies. However, their photocatalytic performance is not satisfactory yet, which limits their use in practical applications. To date, the charge carrier behavior of surface-engineered bismuth-based nanostructured photocatalysts has been under study to harness abundant solar energy for pollutant degradation and water splitting. Therefore, in this review, photocatalytic concepts and surface engineering for improving charge transport and the separation of available photocatalysts are first introduced. Afterward, the different strategies mainly implemented for the improvement of the photocatalytic activity are considered, including different synthetic approaches, the engineering of nanostructures, the influence of phase structure, and the active species produced from heterojunctions. Photocatalytic enhancement via the surface plasmon resonance effect is also examined and the photocatalytic performance of the bismuth-based photocatalytic mechanism is elucidated and discussed in detail, considering the different semiconductor junctions. Based on recent reports, current challenges and future directions for designing and developing bismuth-based nanostructured photocatalysts for enhanced photoactivity and stability are summarized.
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Affiliation(s)
| | - Jie Zeng
- School of Mechanical Engineering, Yeungnam University, Gyeongsan 38541, Republic of Korea
| | | | - Jaesool Shim
- School of Mechanical Engineering, Yeungnam University, Gyeongsan 38541, Republic of Korea
| | - Alain Mauger
- Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie (IMPMC), Sorbonne Université, CNRS-UMR 7590, 4 Place Jussieu, 75252 Paris, France
| | - Christian M. Julien
- Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie (IMPMC), Sorbonne Université, CNRS-UMR 7590, 4 Place Jussieu, 75252 Paris, France
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19
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Zhao J, Li C, Du X, Zhu Y, Li S, Liu X, Liang C, Yu Q, Huang L, Yang K. Recent Progress of Carbon Dots for Air Pollutants Detection and Photocatalytic Removal: Synthesis, Modifications, and Applications. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2200744. [PMID: 36251773 DOI: 10.1002/smll.202200744] [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: 02/03/2022] [Revised: 04/07/2022] [Indexed: 06/16/2023]
Abstract
Rapid industrialization has inevitably led to serious air pollution problems, thus it is urgent to develop detection and treatment technologies for qualitative and quantitative analysis and efficient removal of harmful pollutants. Notably, the employment of functional nanomaterials, in sensing and photocatalytic technologies, is promising to achieve efficient in situ detection and removal of gaseous pollutants. Among them, carbon dots (CDs) have shown significant potential due to their superior properties, such as controllable structures, easy surface modification, adjustable energy band, and excellent electron-transfer capacities. Moreover, their environmentally friendly preparation and efficient capture of solar energy provide a green option for sustainably addressing environmental problems. Here, recent advances in the rational design of CDs-based sensors and photocatalysts are highlighted. An overview of their applications in air pollutants detection and photocatalytic removal is presented, especially the diverse sensing and photocatalytic mechanisms of CDs are discussed. Finally, the challenges and perspectives are also provided, emphasizing the importance of synthetic mechanism investigation and rational design of structures.
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Affiliation(s)
- Jungang Zhao
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, P. R. China
- Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, P. R. China
| | - Caiting Li
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, P. R. China
- Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, P. R. China
| | - Xueyu Du
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, P. R. China
- Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, P. R. China
| | - Youcai Zhu
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, P. R. China
- Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, P. R. China
| | - Shanhong Li
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, P. R. China
- Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, P. R. China
| | - Xuan Liu
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, P. R. China
- Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, P. R. China
| | - Caixia Liang
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, P. R. China
- Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, P. R. China
| | - Qi Yu
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, P. R. China
- Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, P. R. China
| | - Le Huang
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, P. R. China
- Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, P. R. China
| | - Kuang Yang
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, P. R. China
- Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, P. R. China
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20
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Chen Z, Liao Y, Chen Y, Ma X. In situ DRIFTS FT-IR and DFT study on Fe-V-W/Ti removal of NO x and VOCs. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:81571-81582. [PMID: 35737261 DOI: 10.1007/s11356-022-21244-4] [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: 04/01/2022] [Accepted: 05/30/2022] [Indexed: 06/15/2023]
Abstract
Nitrogen oxides (NOX) and volatile organic compounds (VOCs) are generated during the coal-fired power plant's combustion. They can be simultaneously removed in SCR (selective catalytic reduction) region. Herein, the performance of V-W/Ti and Fe-V-W/Ti synthesized by wet impregnation in removing NOX and VOCs was evaluated. XPS (X-ray photoelectron spectroscopy) result indicated that a redox cycle of Fe2+ + V5+ ⇌ Fe3+ + V4+ could form electron vacancy through electron transfer. Besides, the mechanisms of NH3-SCR and VOCs catalytic oxidation were explored with in situ DRIFTS experience and DFT calculation. On Fe-V-W/Ti, in situ DRIFTS study found more absorption sites of NH3, and different intermediates during simultaneously removal process. DFT calculation demonstrated that absorption energy of O2 was decreased and O = O bond was lengthened with Fe doped. Both V-W/Ti and Fe-V-W/Ti followed the L-H mechanism and shared a common NH3-SCR pathway: [Formula: see text]. However, the bidentate nitrate and monodentate nitrate were also revealed on Fe-V-W/Ti, which combined with NH4+ and decomposed into N2 and H2O, or N2O and H2O, respectively. The detected NH2 species combined with NO on the Fe-V-W/Ti, following the E-R mechanism. As for VOCs, the intermediates of benzene and toluene were revealed by in situ DRIFTS study, and detailed Mars-van Krevelen mechanism was discovered.
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Affiliation(s)
- Zhuofan Chen
- School of Electric Power, South China University of Technology, No. 381, Wushan Road, Tianhe District, Guangzhou, 510640, China
- Guangdong Province Key Laboratory of Efficient and Clean Energy Utilization, Guangzhou, 510640, China
- Guangdong Province Engineering Research Center of High Efficient and Low Pollution Energy Conversion, Guangzhou, 510640, Guangdong, China
| | - Yanfen Liao
- School of Electric Power, South China University of Technology, No. 381, Wushan Road, Tianhe District, Guangzhou, 510640, China.
- Guangdong Province Key Laboratory of Efficient and Clean Energy Utilization, Guangzhou, 510640, China.
- Guangdong Province Engineering Research Center of High Efficient and Low Pollution Energy Conversion, Guangzhou, 510640, Guangdong, China.
| | - Yin Chen
- School of Electric Power, South China University of Technology, No. 381, Wushan Road, Tianhe District, Guangzhou, 510640, China
- Guangdong Province Key Laboratory of Efficient and Clean Energy Utilization, Guangzhou, 510640, China
- Guangdong Province Engineering Research Center of High Efficient and Low Pollution Energy Conversion, Guangzhou, 510640, Guangdong, China
| | - Xiaoqian Ma
- School of Electric Power, South China University of Technology, No. 381, Wushan Road, Tianhe District, Guangzhou, 510640, China
- Guangdong Province Key Laboratory of Efficient and Clean Energy Utilization, Guangzhou, 510640, China
- Guangdong Province Engineering Research Center of High Efficient and Low Pollution Energy Conversion, Guangzhou, 510640, Guangdong, China
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21
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A compact Z-scheme heterojunction of BiOCl/Bi2WO6 for efficiently photocatalytic degradation of gaseous toluene. J Colloid Interface Sci 2022; 631:44-54. [DOI: 10.1016/j.jcis.2022.11.023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2022] [Revised: 10/26/2022] [Accepted: 11/06/2022] [Indexed: 11/10/2022]
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22
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Wang H, Chen L, Xiao L, Li K, Sun Y, Dong F. Engineering the surface delocalized electrons facilitates the ring-opening for deep toluene oxidation. J Catal 2022. [DOI: 10.1016/j.jcat.2022.06.041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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23
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Ma ZP, Zhang L, Ma X, Shi FN. A dual strategy for synthesizing crystal plane/defect co-modified BiOCl microsphere and photodegradation mechanism insights. J Colloid Interface Sci 2022; 617:73-83. [DOI: 10.1016/j.jcis.2022.02.082] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2022] [Revised: 02/16/2022] [Accepted: 02/19/2022] [Indexed: 12/26/2022]
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24
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Photocatalytic Reactor as a Bridge to Link the Commercialization of Photocatalyst in Water and Air Purification. Catalysts 2022. [DOI: 10.3390/catal12070724] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
The development of clean and sustainable teleology is vital to treat the critical environmental pollutants. In the last decade, the use of photocatalytic reactors has been widely reported for organic pollutants degradation. From photocatalysis’s application in environmental remediation, the primary technical issue to scientists is always the efficiency. The enhanced photocatalytic efficiency is mainly depended on the materials improvement. However, the design of photoreactors lags behind the development of photocatalysts, which strongly limit the widespread use of photocatalysis technology in environmental remediation. The nanoparticles separation, mass transfer limitation, and photonic efficiency have always been problematic and restrict the high photocatalytic efficiency of photoreactors. To overcome these bottleneck problems, the most popular or newfangled designs of photoreactors employed in air and water treatment has been reviewed. The purpose of this review is to systematize designs and synthesis of innovative TiO2-based photoreactors and provides detailed survey and discussion on the enhanced mechanism of photocatalytic performance in different TiO2-based photoreactors. The most studied photoreactors are the following: packed bed reactor, film reactor and membrane reactor, which have some limitations and advantages. A comprehensive comparison between the different photocatalytic performance of TiO2-based photoreactors is presented. This work aims to summarize the progress of TiO2-based photoreactors and provides useful information for the further research and development of photocatalysis for water and air purification.
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25
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Dong X, Cui Z, Shi X, Yan P, Wang Z, Co AC, Dong F. Insights into Dynamic Surface Bromide Sites in Bi 4 O 5 Br 2 for Sustainable N 2 Photofixation. Angew Chem Int Ed Engl 2022; 61:e202200937. [PMID: 35233878 DOI: 10.1002/anie.202200937] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Indexed: 02/04/2023]
Abstract
Simulating photosynthesis has long been one of the ideas for realizing the conversion of solar energy into industrial chemicals. Heterogeneous N2 photofixation in water is a promising way for sustainable production of ammonia. However, a mechanistic understanding of the complex aqueous photocatalytic N2 reduction is still lacking. In this study, a light-dependent surface hydrogenation mechanism and light-independent protection of catalyst surface for N2 reduction are revealed on ultrathin Bi4 O5 Br2 (BOB) nanosheets, in which the creation and annihilation of surface bromine vacancies can be controlled via a surface bromine cycle. Our rapid scan in situ FT-IR spectra verify that photocatalytic N2 reduction proceeds through an associative alternating mechanism on BOB surface with bromine vacancies (BrV-BOB). This work provides a new strategy to combine light-dependent facilitated reaction with light-independent regeneration of catalyst for advancing sustainable ammonia production.
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Affiliation(s)
- Xing'an Dong
- Research Center for Environmental and Energy Catalysis, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, 611731, P. R. China.,Yangtze Delta Region Institute (Huzhou), University of Electronic Science and Technology of China, Huzhou, 313001, P. R. China
| | - Zhihao Cui
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio, 43210, USA
| | - Xian Shi
- Research Center for Environmental and Energy Catalysis, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, 611731, P. R. China
| | - Ping Yan
- Research Center for Environmental and Energy Catalysis, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, 611731, P. R. China.,College of Architecture and Environment, Sichuan University, Chengdu, 610065, P. R. China
| | - Zhiming Wang
- Research Center for Environmental and Energy Catalysis, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, 611731, P. R. China
| | - Anne C Co
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio, 43210, USA
| | - 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, P. R. China.,Yangtze Delta Region Institute (Huzhou), University of Electronic Science and Technology of China, Huzhou, 313001, P. R. China
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26
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Mei J, Shen Y, Li Y, Zhang S, Shen Y, Li W, Cheng Z, Zhao J, Chen J. Combined experimental and theoretical study of o-xylene elimination on Fe-Mn oxides catalysts. CHEMOSPHERE 2022; 292:133442. [PMID: 34971626 DOI: 10.1016/j.chemosphere.2021.133442] [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: 09/12/2021] [Revised: 12/01/2021] [Accepted: 12/23/2021] [Indexed: 06/14/2023]
Abstract
The development of low-cost and easily accessible catalysts to realize the practical applications of catalytic combustion of volatile organic compounds remains a challenge. In this work, a series of Fe-Mn oxides catalysts were prepared via a facile redox-precipitation route for the elimination of o-xylene. Among the synthesized catalysts, Fe3Mn1-RP exhibited excellent activity for o-xylene elimination with a T50 and T90 of 223 °C and 236 °C, respectively (o-xylene concentration = 500 ppm, WHSV = 36,000 mL g-1 h-1). Characterization results demonstrated that superior catalytic activity could be achieved from large specific surface area, good reducibility and high proportion of Mn4+. Besides, high Fe contents proved beneficial in generating additional oxygen vacancies, thereby improving the performance of the catalyst. The stable crystal structures and surface electron density distributions of the catalysts, and adsorption sites of o-xylene on the catalyst surface, were also determined through density functional theory (DFT) calculations to provide an in-depth mechanism on how the o-xylene oxidation occurred. Moreover, analysis of the energy barrier during the oxidation process proved that the ring-opening reaction on the surface of Fe3Mn1-RP with an activation energy as low as 2.46 eV would more likely occur via oxygen vacancies.
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Affiliation(s)
- Ji Mei
- College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua, 321004, China
| | - Yao Shen
- Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou, 310014, China; Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Institute of Industrial Ecology and Environment, College of Chemical and Biological Engineering, Zhejiang University, Yuquan Campus, Hangzhou, 310027, China
| | - Yuanming Li
- College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua, 321004, China
| | - Shihan Zhang
- Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou, 310014, China
| | - Yi Shen
- Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou, 310014, China
| | - Wei Li
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Institute of Industrial Ecology and Environment, College of Chemical and Biological Engineering, Zhejiang University, Yuquan Campus, Hangzhou, 310027, China
| | - Zhuowei Cheng
- Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou, 310014, China
| | - Jingkai Zhao
- Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou, 310014, China.
| | - Jianrong Chen
- College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua, 321004, China.
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27
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Dong X, Cui Z, Shi X, Yan P, Wang Z, Co AC, Dong F. Insights into Dynamic Surface Bromide Sites in Bi
4
O
5
Br
2
for Sustainable N
2
Photofixation. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202200937] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Xing'an Dong
- Research Center for Environmental and Energy Catalysis Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of China Chengdu 611731 P. R. China
- Yangtze Delta Region Institute (Huzhou) University of Electronic Science and Technology of China Huzhou 313001 P. R. China
| | - Zhihao Cui
- Department of Chemistry and Biochemistry The Ohio State University Columbus Ohio 43210 USA
| | - Xian Shi
- Research Center for Environmental and Energy Catalysis Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of China Chengdu 611731 P. R. China
| | - Ping Yan
- Research Center for Environmental and Energy Catalysis Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of China Chengdu 611731 P. R. China
- College of Architecture and Environment Sichuan University Chengdu 610065 P. R. China
| | - Zhiming Wang
- Research Center for Environmental and Energy Catalysis Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of China Chengdu 611731 P. R. China
| | - Anne C. Co
- Department of Chemistry and Biochemistry The Ohio State University Columbus Ohio 43210 USA
| | - 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 P. R. China
- Yangtze Delta Region Institute (Huzhou) University of Electronic Science and Technology of China Huzhou 313001 P. R. China
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28
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Li Q, Yue ZH, Li YL, Hao YJ, Wang XJ, Su R, Li FT. Construction of Dual-Defective Al2O3/Bi12O17Cl2 Heterojunctions for Enhanced Photocatalytic Molecular Oxygen Activation via Defect Coupling and Charge Separation. Ind Eng Chem Res 2021. [DOI: 10.1021/acs.iecr.1c04440] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Qi Li
- Hebei Key Laboratory of Photoelectric Control on Surface and Interface, College of Science, Hebei University of Science and Technology, Shijiazhuang 050018, China
| | - Zi-han Yue
- Hebei Key Laboratory of Photoelectric Control on Surface and Interface, College of Science, Hebei University of Science and Technology, Shijiazhuang 050018, China
| | - Yi-lei Li
- Hebei Key Laboratory of Photoelectric Control on Surface and Interface, College of Science, Hebei University of Science and Technology, Shijiazhuang 050018, China
| | - Ying-juan Hao
- Hebei Key Laboratory of Photoelectric Control on Surface and Interface, College of Science, Hebei University of Science and Technology, Shijiazhuang 050018, China
| | - Xiao-jing Wang
- Hebei Key Laboratory of Photoelectric Control on Surface and Interface, College of Science, Hebei University of Science and Technology, Shijiazhuang 050018, China
| | - Ran Su
- Hebei Key Laboratory of Photoelectric Control on Surface and Interface, College of Science, Hebei University of Science and Technology, Shijiazhuang 050018, China
| | - Fa-tang Li
- Hebei Key Laboratory of Photoelectric Control on Surface and Interface, College of Science, Hebei University of Science and Technology, Shijiazhuang 050018, China
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29
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Chen J, Yi J, Zhu W, Zhang W, An T. Oxygen Isotope Tracing Study to Directly Reveal the Role of O 2 and H 2O in the Photocatalytic Oxidation Mechanism of Gaseous Monoaromatics. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2021; 55:16617-16626. [PMID: 34870981 DOI: 10.1021/acs.est.1c05134] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
O2 and H2O influence the photocatalytic oxidation mechanism of gaseous monoaromatics, but still in an unclear manner, due to the lack of direct evidence. Tracing an oxygen atom from 16O2 and H218O to intermediates can clarify their roles. The low H218O content suppressed the formation of benzenedicarboxaldehydes during the oxidation of xylenes and 16O2 greatly affected the yield of total intermediates, while neither of them altered the percentage order of the products. Methylbenzaldehydes, methylbenzyl alcohols, and benzenedicarboxaldehydes possessed greater 16O percentage (≥69.49%), while higher 18O distribution was observed in methylbenzoic acids and phthalide (≥59.51%). Together with the interconversion results of the products revealed, 16O2 determined the transformation of xylenes initially to methylbenzaldehydes and then to methylbenzyl alcohols or benzenedicarboxaldehydes, while H218O mainly contributed to conversion of methylbenzaldehydes to methylbenzoic acids or phthalide. Further interaction sites of xylene and its products with H2O and O2 were confirmed by molecular dynamics calculations. The same roles of 16O2 and H218O in the degradation of toluene, ethylbenzene, 1,2,4-trimethylbenzene, and 1,3,5-trimethylbenzene were also verified. This is the first report that provides direct evidence for the roles of O2 and H2O in the photocatalytic oxidation mechanism of gaseous monoaromatics. These findings are helpful to achieve controllable product formation from the oxidation of monoaromatics and predict their migration process in the atmospheric environment.
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Affiliation(s)
- Jiangyao Chen
- Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, Guangdong Technology Research Center for Photocatalytic Technology Integration and Equipment Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China
- Guangzhou Key Laboratory of Environmental Catalysis and Pollution Control, Guangdong-Hong Kong-Macao Joint Laboratory for Contaminants Exposure and Health, School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China
| | - Jiajing Yi
- Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, Guangdong Technology Research Center for Photocatalytic Technology Integration and Equipment Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China
| | - Weikun Zhu
- Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, Guangdong Technology Research Center for Photocatalytic Technology Integration and Equipment Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China
| | - Weina Zhang
- Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, Guangdong Technology Research Center for Photocatalytic Technology Integration and Equipment Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China
- Guangzhou Key Laboratory of Environmental Catalysis and Pollution Control, Guangdong-Hong Kong-Macao Joint Laboratory for Contaminants Exposure and Health, School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China
| | - Taicheng An
- Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, Guangdong Technology Research Center for Photocatalytic Technology Integration and Equipment Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China
- Guangzhou Key Laboratory of Environmental Catalysis and Pollution Control, Guangdong-Hong Kong-Macao Joint Laboratory for Contaminants Exposure and Health, School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China
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30
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Zhao X, Deng B, Li F, Huang M, Sun Y, Li J, Dong F. Efficient photocatalytic toluene degradation over heterojunction of GQDs@BiOCl ultrathin nanosheets with selective benzoic acid activation. JOURNAL OF HAZARDOUS MATERIALS 2021; 420:126577. [PMID: 34274806 DOI: 10.1016/j.jhazmat.2021.126577] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Revised: 06/11/2021] [Accepted: 07/02/2021] [Indexed: 06/13/2023]
Abstract
Photocatalytic toluene degradation has attracted tremendous attention because of the growing environmental problem. However, conventional photocatalytic materials used for toluene degradation usually suffer from low carrier separation efficiency and poor stability which will degrade the catalytic performance. Herein, we report the synthesis of a novel heterostructure of GQDs@BiOCl ultrathin nanosheets where the GQDs can rapidly capture and transport photogenerated electrons for effective charge separation, promoting the generation of more reactive oxygen species (·O2- and ·OH radicals) for toluene degradation. In situ DRIFTS measurement and theoretical calculation are performed to unveil the reaction intermediates and the underlying toluene oxidation mechanism. The GQDs@BiOCl heterojunction could facilitate the adsorption and conversion of toluene and the reaction intermediates. Especially, the heterojunction greatly enhances the activation and conversion of benzoic acid and thus expedites the complete toluene degradation. This work presents a new insight on the design of high-performance photocatalysts for efficient degradation of typical air pollutants.
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Affiliation(s)
- Xiaoli Zhao
- Research Center for Environmental and Energy Catalysis, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 611731, China
| | - Bangwei Deng
- 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 313001, China
| | - Fei Li
- Material Systems for Nanoelectronics, Chemnitz University of Technology, 09107 Chemnitz, Germany
| | - Ming Huang
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 70 Nanyang Drive, 637457 Singapore
| | - Yanjuan Sun
- Yangtze Delta Region Institute (Huzhou), University of Electronic Science and Technology of China, Huzhou 313001, China; School of Resources and Environment, University of Electronic Science and Technology of China, Chengdu 611731, China
| | - Jieyuan Li
- 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 313001, 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 313001, 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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31
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Liu W, Zhou J, Liu D, Liu S, Liu X, Xiao S, Feng C, Leng C. Fe-MOF by ligand selective pyrolysis for Fenton-like process and photocatalysis: Accelerating effect of oxygen vacancy. J Taiwan Inst Chem Eng 2021. [DOI: 10.1016/j.jtice.2021.08.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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Flowerlike BiOCl nanospheres fabricated by an in situ self-assembly strategy for efficiently enhancing photocatalysis. J Colloid Interface Sci 2021; 607:423-430. [PMID: 34509116 DOI: 10.1016/j.jcis.2021.09.002] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2021] [Revised: 08/31/2021] [Accepted: 09/01/2021] [Indexed: 12/23/2022]
Abstract
For semiconductor-based photocatalytic reactions, defect engineering has been proven as an efficient approach to enhance the photocatalytic performance. In this work, a synergistically PVP/EG-assisted in situ self-assembly strategy has been successfully developed for preparing flowerlike BiOCl nanospheres (NSP) assembled by ultrathin nanosheets (thickness of 3.8 nm) with abundant oxygen vacancies (OVs). During the hydrothermal process, PVP plays a template role in controlling the orientation of the crystallite growth, leading to the forming of nanosheets. Meanwhlie, ethylene glycol would induce the self-assembly of nanosheets into a loose hierarchical architecture duo to its stereo-hindrance effect. NSP achieves a twice higher photocatalytic conversion of benzylamine than BiOCl nanosheets (NST) under visible light. XPS, ESR, NH3-TPD results manifest that NSP possesses more active sites including OVs and unsaturated Bi atoms than NST, because of avoiding the accumulation of ultrathin nanosheets. In situ FTIR reveals that benzylamine molecules can be chemisorbed and activated on BiOCl interfaces via forming -N…Bi- species. The OVs can facilitate the forming of superoxide radicals (•O2-), achieving the selective photooxidation. Finally, a possible synergetic mechanism based on the interaction of reactants and catalyst interfaces was proposed to illustrate the photocatalytic process at the molecular level.
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33
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Li K, He Y, Li J, Sheng J, Sun Y, Li J, Dong F. Identification of deactivation-resistant origin of In(OH) 3 for efficient and durable photodegradation of benzene, toluene and their mixtures. JOURNAL OF HAZARDOUS MATERIALS 2021; 416:126208. [PMID: 34492969 DOI: 10.1016/j.jhazmat.2021.126208] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Revised: 05/15/2021] [Accepted: 05/20/2021] [Indexed: 06/13/2023]
Abstract
Aromatic hydrocarbon is a representative type of VOCs, which causes adverse effects to human health. The degradation stability of aromatic hydrocarbon is of vital importance to commercializing a photocatalyst for its practical application. The most commonly used titanium dioxide photocatalyst (P25) was deactivated rapidly in the photocatalytic VOCs degradation process. In this work, the indium hydroxide (In(OH)3) photocatalyst was developed, which exhibited not only higher efficient activity but also ultra-stable stability for degradation of benzene, toluene and their mixtures. The origin of the activity difference between two catalysts was investigated by combined experimental and theoretical ways. Based on in situ DRIFTS and GC-MS, it was revealed that benzoic acid and carbonaceous byproducts were specifically formed and accumulated on P25, which were responsible for deactivation of photocatalyst. In contrast, as revealed by both DFT calculations and experimental results, the reaction pathway with byproducts blocking the active sites can be thermodynamically avoided on In(OH)3. This rendered high durability to In(OH)3 photocatalyst in degradations of aromatic pollutants. The elucidation of deactivation-resistant effect and reaction mechanism as an ideal photocatalyst for practical usage were provided.
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Affiliation(s)
- Kanglu Li
- College of Architecture and Environment, Sichuan University, Chengdu, Sichuan 610065, China; Yangtze Delta Region Institute (Huzhou) & Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Huzhou 313001, China
| | - Ye He
- Yangtze Delta Region Institute (Huzhou) & School of Resources and Environment, University of Electronic Science and Technology of China, Huzhou 313001, China
| | - Jieyuan Li
- Yangtze Delta Region Institute (Huzhou) & Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Huzhou 313001, China
| | - Jianping Sheng
- Yangtze Delta Region Institute (Huzhou) & School of Resources and Environment, University of Electronic Science and Technology of China, Huzhou 313001, China
| | - Yanjuan Sun
- Yangtze Delta Region Institute (Huzhou) & School of Resources and Environment, University of Electronic Science and Technology of China, Huzhou 313001, China
| | - Jianjun Li
- College of Architecture and Environment, Sichuan University, Chengdu, Sichuan 610065, China.
| | - Fan Dong
- Yangtze Delta Region Institute (Huzhou) & Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Huzhou 313001, China.
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Zn-doping mediated formation of oxygen vacancies in SnO2 with unique electronic structure for efficient and stable photocatalytic toluene degradation. CHINESE JOURNAL OF CATALYSIS 2021. [DOI: 10.1016/s1872-2067(20)63737-8] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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35
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Lin Z, He M, Liu Y, Meng M, Cao Z, Huang S, Chen C, Deng H. Effect of calcination temperature on the structural and formaldehyde removal activity of Mn/Fe2O3 catalysts. RESEARCH ON CHEMICAL INTERMEDIATES 2021. [DOI: 10.1007/s11164-021-04470-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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36
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Sun R, Li R, Zhong S, Song N, Zhao Z, Zhang S. Synthesis of efficient Y-Bi 2WO 6/G visible light photocatalysts with high stability for pollutant degradation. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:27864-27877. [PMID: 33517551 DOI: 10.1007/s11356-021-12666-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2020] [Accepted: 01/20/2021] [Indexed: 06/12/2023]
Abstract
For effective photocatalytic pollutant degradation on bismuth tungstate (Bi2WO6), it is vital to enhance the photogenerated charge separation and the photochemical stability. Herein, we successfully fabricated yttrium (Y)-Bi2WO6/graphene (G) nanocomposites with a significantly enhanced visible light-driven photocatalytic ability to degrade Rhodamine B compared with the bare Bi2WO6. This is attributed to the remarkably improved visible light absorption capability and photogenerated charge separation after doping yttrium and subsequent coupling with graphene, as revealed by photoluminescence and electrochemical impedance spectroscopies. Moreover, trapping experiments were carried out to clarify that photogenerated ·O2- and holes were the dominant oxidative species in the photocatalytic reaction. In addition, it was confirmed that the resulting composites maintained good photostability and chemical stability during recycling tests. Graphical abstract.
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Affiliation(s)
- Rui Sun
- Key Lab of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun, 130021, People's Republic of China
| | - Risheng Li
- China Northeast Municipal Engineering Design and Research Institute Co., Ltd., Changchun, People's Republic of China
| | - Shuang Zhong
- Key Lab of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun, 130021, People's Republic of China
- Institute of Water Resources and Environment, Jilin University, No. 2519, Jiefang Road, Changchun, 130026, People's Republic of China
- Key Laboratory of Songliao Aquatic Environment, Ministry of Education, Jilin Jianzhu University, Changchun, 130118, People's Republic of China
| | - Ningning Song
- Key Lab of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun, 130021, People's Republic of China
| | - Zhiqing Zhao
- College of Chemical & Material Engineering, Quzhou University, Quzhou, People's Republic of China
| | - Shengyu Zhang
- Key Lab of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun, 130021, People's Republic of China.
- Institute of Water Resources and Environment, Jilin University, No. 2519, Jiefang Road, Changchun, 130026, People's Republic of China.
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37
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Shao L, Yang Z, Liu Y, Xia X, Li S, Yang C. Surface structure tuning of BiOCl nanosheets by the sequential introduction of oxygen vacancies, PO 43- and Ag + for boosting photodegradation of tetracycline hydrochloride. ENVIRONMENTAL RESEARCH 2021; 197:111056. [PMID: 33771512 DOI: 10.1016/j.envres.2021.111056] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Revised: 02/06/2021] [Accepted: 03/17/2021] [Indexed: 06/12/2023]
Abstract
The surface structure significantly impacts the physicochemical properties of semiconductors. Constructing heterojunction is a universal approach to tune surface structure, which can effectively accelerate the charge transfer at the interface. Here, BiOCl nanosheets which occupy high ratio of surface atoms to entire atoms were used as a model photocatalyst, and a strategy was proposed to tune its surface structure by sequential introduction of oxygen vacancies, PO43- and Ag+ on surface of BiOCl nanosheets. In order to inhibit the overgrowth of heterogeneous component, the excess PO43- was timely removed by centrifugation before adding Ag+. As a result, the as-obtained optimal sample which was confirmed to be a composite composed of BiOCl, BiPO4 and AgCl showed superior photocatalytic activity for tetracycline hydrochloride degradation with the rate of 38 times higher than that of pristine BiOCl, which was mainly attributed to the quick migration of photongenerated carrier. The active species h+ and •O2- played a vital role in this degradation process. Our strategy not only greatly saved investment of noble metal Ag, but also provide superior stability. On the basis of experimental results and density functional theory calculation, the visible-light driven catalytic mechanism was revealed.
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Affiliation(s)
- Luhua Shao
- College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, PR China
| | - Zhenfei Yang
- College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, PR China
| | - Yutang Liu
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, PR China
| | - Xinnian Xia
- College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, PR China; Advanced Catalytic Engineering Research Center of the Ministry of Education, Hunan University, Changsha, 410082, PR China.
| | - Sijian Li
- College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, PR China
| | - Cong Yang
- College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, PR China
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38
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Liu Y, Zhu C, Sun J, Ge Y, Song F, Wang G, Xu Q. Efficient photocatalytic degradation of volatile organic compounds over carbon quantum dots decorated Bi 2WO 6 under visible light. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:25949-25958. [PMID: 33479875 DOI: 10.1007/s11356-020-12273-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Accepted: 12/28/2020] [Indexed: 06/12/2023]
Abstract
A series of CQDs/Bi2WO6 (CBW) hybrid materials with different loading amounts of carbon quantum dots (CQDs) were prepared via a facile in situ hydrothermal method. As determined by multiple techniques including XRD, TEM, UV-vis, PL, TPR, and XPS, the CBW possessed expanded visible light response interval, decreased recombination rate of the photogenerated electron hole, and enhanced oxidation ability as compared with the pristine Bi2WO6. In addition, with different loading amounts of CQDs, the optical and electronic properties of the corresponding CBW were different. These CBW materials performed superior activities to the pristine Bi2WO6 in the photodegradation of VOCs under visible light, among which the CBW-2 demonstrated the best activity of almost complete degradation within only 120 min. Moreover, the CBW-2 exhibited high stability and reusability after five cycles.
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Affiliation(s)
- Yangqing Liu
- School of Chemistry and Chemical Engineering, Yancheng Institute of Technology, Yancheng, 224000, People's Republic of China
- Key Laboratory for Advanced Technology in Environmental Protection of Jiangsu Province, Yancheng Institute of Technology, Yancheng, 224051, People's Republic of China
| | - Changjun Zhu
- School of Chemistry and Chemical Engineering, Yancheng Institute of Technology, Yancheng, 224000, People's Republic of China
- Key Laboratory under Construction for Volatile Organic Compounds Controlling of Jiangsu Province, Yancheng Institute of Technology, Yancheng, 224051, People's Republic of China
- Academy of Environmental Planning & Design, Co., Ltd., Nanjing University, Nanjing, 210093, People's Republic of China
| | - Jingwen Sun
- School of Chemistry and Chemical Engineering, Yancheng Institute of Technology, Yancheng, 224000, People's Republic of China
- Key Laboratory under Construction for Volatile Organic Compounds Controlling of Jiangsu Province, Yancheng Institute of Technology, Yancheng, 224051, People's Republic of China
| | - Yan Ge
- School of Chemistry and Chemical Engineering, Yancheng Institute of Technology, Yancheng, 224000, People's Republic of China
- Key Laboratory under Construction for Volatile Organic Compounds Controlling of Jiangsu Province, Yancheng Institute of Technology, Yancheng, 224051, People's Republic of China
| | - Fujiao Song
- School of Chemistry and Chemical Engineering, Yancheng Institute of Technology, Yancheng, 224000, People's Republic of China
- Key Laboratory for Advanced Technology in Environmental Protection of Jiangsu Province, Yancheng Institute of Technology, Yancheng, 224051, People's Republic of China
| | - Guanzhong Wang
- Academy of Environmental Planning & Design, Co., Ltd., Nanjing University, Nanjing, 210093, People's Republic of China
| | - Qi Xu
- School of Chemistry and Chemical Engineering, Yancheng Institute of Technology, Yancheng, 224000, People's Republic of China.
- Key Laboratory under Construction for Volatile Organic Compounds Controlling of Jiangsu Province, Yancheng Institute of Technology, Yancheng, 224051, People's Republic of China.
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Gu W, Li C, Qiu J, Yao J. Facile fabrication of flower-like MnO 2 hollow microspheres as high-performance catalysts for toluene oxidation. JOURNAL OF HAZARDOUS MATERIALS 2021; 408:124458. [PMID: 33168316 DOI: 10.1016/j.jhazmat.2020.124458] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Revised: 10/29/2020] [Accepted: 11/01/2020] [Indexed: 06/11/2023]
Abstract
A facile and robust interface reaction method for controllable synthesis of hierarchically structured flower-like MnO2 hollow microspheres was developed at a low cost. With MnCO3 microspheres as homologous templates, KMnO4 was used to conduct redox reactions with the surface layer of the MnCO3 microspheres to form porous flower-like MnO2. Then, the internal template was removed by HCl etching to obtain flower-like MnO2 hollow microspheres. HCl plays the dual role of removing the template and generating oxygen vacancies through acid etching. The as-prepared flower-like MnO2 hollow microspheres exhibited excellent low-temperature catalytic activity for toluene oxidation owing to the desirable features of a high specific surface area, abundant oxygen vacancies, high content of Mn4+, a high number of acidic sites and a strong acidity. This work provides a new strategy for the facile construction of high-performance volatile organic compounds oxidation catalysts with industrial application prospects.
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Affiliation(s)
- Wenxiu Gu
- School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China.
| | - Chenqi Li
- School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China
| | - Jianhao Qiu
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Chemical Engineering, Nanjing Forestry University, Nanjing, Jiangsu, 210037, China
| | - Jianfeng Yao
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Chemical Engineering, Nanjing Forestry University, Nanjing, Jiangsu, 210037, China.
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40
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Chen L, Chen P, Wang H, Cui W, Sheng J, Li J, Zhang Y, Zhou Y, Dong F. Surface Lattice Oxygen Activation on Sr 2Sb 2O 7 Enhances the Photocatalytic Mineralization of Toluene: from Reactant Activation, Intermediate Conversion to Product Desorption. ACS APPLIED MATERIALS & INTERFACES 2021; 13:5153-5164. [PMID: 33472365 DOI: 10.1021/acsami.0c20996] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Transition-metal oxide photocatalysis has attracted increasing attention in environmental remediation and solar energy conversion. Surface lattice oxygen is the key active site on the metal oxide, but its role and activation mechanism in the photocatalytic VOC mineralization are still unclear. In this work, we have demonstrated that Sr2Sb2O7 exhibits an excellent photocatalytic activity and stability compared to TiO2 (P25) in gaseous toluene mineralization because the lattice oxygen on Sr2Sb2O7 can be activated efficiently. The lattice oxygen of Sr2Sb2O7 promotes the adsorption and activation of O2 and H2O molecules and enhances the production of •O2- and •OH radicals, as confirmed by the electron spin resonance and DFT calculations. The in situ diffuse reflectance infrared Fourier transform spectroscopy spectra are applied to dynamically monitor the intermediate activation and selective conversion. Combined with DFT calculation, the role and the mechanism of lattice oxygen in photocatalysis have been revealed. Owing to the promoted surface lattice oxygen, the selectivity for benzoic acid formation is enhanced and final product desorption is promoted, which could largely advance the ring opening and mineralization of toluene. This work reveals the origin of lattice oxygen activation and the role for efficient VOC degradation at the atomic scale.
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Affiliation(s)
- Lvcun Chen
- The Center of New Energy Materials and Technology, School of New Energy and Materials, Southwest Petroleum University, Chengdu 610500, P. R. China
- Yangtze Delta Region Institute (Huzhou), & Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Huzhou 313001, China
| | - Peng Chen
- The Center of New Energy Materials and Technology, School of New Energy and Materials, Southwest Petroleum University, Chengdu 610500, P. R. China
- Yangtze Delta Region Institute (Huzhou), & Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Huzhou 313001, China
| | - Hong Wang
- Yangtze Delta Region Institute (Huzhou), & Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Huzhou 313001, China
| | - Wen Cui
- The Center of New Energy Materials and Technology, School of New Energy and Materials, Southwest Petroleum University, Chengdu 610500, P. R. China
- Yangtze Delta Region Institute (Huzhou), & Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Huzhou 313001, China
| | - Jianping Sheng
- Yangtze Delta Region Institute (Huzhou), & Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Huzhou 313001, China
| | - Jieyuan Li
- Yangtze Delta Region Institute (Huzhou), & Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Huzhou 313001, China
| | - Yuxin Zhang
- College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China
| | - Ying Zhou
- The Center of New Energy Materials and Technology, School of New Energy and Materials, Southwest Petroleum University, Chengdu 610500, P. R. China
| | - Fan Dong
- The Center of New Energy Materials and Technology, School of New Energy and Materials, Southwest Petroleum University, Chengdu 610500, P. R. China
- Yangtze Delta Region Institute (Huzhou), & Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Huzhou 313001, 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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41
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Achieving superior visible-light photocatalytic activity of surface-defect-rich Bi4Ti3O12 platelets. Chem Phys Lett 2021. [DOI: 10.1016/j.cplett.2020.138273] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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42
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43
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Li S, Lin Y, Wang D, Zhang C, Wang Z, Li X. Polyhedral cobalt oxide supported Pt nanoparticles with enhanced performance for toluene catalytic oxidation. CHEMOSPHERE 2021; 263:127870. [PMID: 32835967 DOI: 10.1016/j.chemosphere.2020.127870] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Revised: 07/26/2020] [Accepted: 07/27/2020] [Indexed: 06/11/2023]
Abstract
Polyhedral CoOx was synthesized by calcination of Co-based metal-organic framework ZIF-67 and highly dispersed Pt nanoparticles were successfully loaded on CoOx. The catalytic results showed that Ptnano/CoOx had the best activity and stability. As compared with conventional Co3O4, polyhedral CoOx showed more excellent catalytic oxidation performance of toluene, which was related to enhanced oxygen mobility, defective structure and rich active oxygen species provided by Polyhedral CoOx. Moreover, Pt-CoOx metal-support interaction enhanced the dispersion of Pt species and showed more Pt0 ratio. It was reasonable that the gaseous O2 can be activated directly or moved into the catalyst's surface to form oxygen cycle.
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Affiliation(s)
- Shuangju Li
- Key Laboratory of Biofuels, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, 266101, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Yin Lin
- Key Laboratory of Biofuels, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, 266101, China
| | - Da Wang
- Key Laboratory of Biofuels, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, 266101, China
| | - Chuanhui Zhang
- Institute of Materials for Energy and Environment, Qingdao University, Qingdao, 266071, China
| | - Zhong Wang
- Key Laboratory of Biofuels, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, 266101, China.
| | - Xuebing Li
- Key Laboratory of Biofuels, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, 266101, China.
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44
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Xiao L, Chen P, Yang W, Zhao X, Dong F. Photocatalytic reaction mechanisms at the gas–solid interface for environmental and energy applications. Catal Sci Technol 2021. [DOI: 10.1039/d1cy01776d] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Five gas–solid photocatalytic reactions including the oxidation of NOx, VOCs and NH3, and reduction of CO2 and N2 are summarized. Besides, basic properties of gas molecules, their adsorption and activation, and various reaction pathways are analyzed.
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Affiliation(s)
- 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
- Yangtze Delta Region Institute (Huzhou), University of Electronic Science and Technology of China, Huzhou 313000, China
| | - Peng Chen
- The Center of New Energy Materials and Technology, School of New Energy and Materials, Southwest Petroleum University, Chengdu 610500, China
| | - Weiping Yang
- 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
| | - Xiaoli Zhao
- Research Center for Environmental and Energy Catalysis, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 611731, 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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45
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Raza SA, Qureshi MA, Ahmed M, Qaiser S, Ali R, Ahmed F. Non-linear relationship between tourism, economic growth, urbanization, and environmental degradation: evidence from smooth transition models. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:1426-1442. [PMID: 32840747 DOI: 10.1007/s11356-020-10179-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Accepted: 07/16/2020] [Indexed: 06/11/2023]
Abstract
The study aims to analyze two objectives: first is to explore the non-linear relationship between tourism development, economic growth, urbanization, and environmental degradation, and also to analyze the threshold level of the contribution of tourism development on environmental degradation in top tourist arrival destinations. We applied the newly proposed econometric method panel smooth transition regression (PSTR) framework with two regimes on yearly panel data from 1995 to 2017. Findings suggest that the relationship between tourism development and environmental degradation is non-linear and regime dependent. Furthermore, the findings indicated that the relationship above the threshold level is negative and significant, while below the threshold, tourism development is positive and significant effect on environmental degradation. Tourism development and environmental degradation also exhibit the inverted U-shape relationship meaning that at a particular point, increase in tourism development increases in environmental degradation but after a particular point, increase in tourism development decreases the environmental degradation. The economic growth and urbanization also portray a non-linear and regime-dependent relationship with environmental degradation. The study assists policies and empirical information.
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Affiliation(s)
- Syed Ali Raza
- Department of Management Sciences, IQRA University, Karachi, 75300, Pakistan.
| | - Muhammad Asif Qureshi
- Faculty of Business Administration and Social Sciences, Mohammad Ali Jinnah University, Karachi, Pakistan
| | - Maiyra Ahmed
- Department of Management Sciences, IQRA University, Karachi, 75300, Pakistan
| | - Shahzad Qaiser
- Department of Computer Science, Capital University of Science and Technology (CUST), Islamabad, Pakistan
| | - Ramsha Ali
- School of Quantitative Sciences, UUM College of Arts and Sciences, Universiti Utara Malaysia, UUM, 06010, Sintok, Kedah, Malaysia
| | - Farhan Ahmed
- Department of Economics & Management Sciences, NED University of Engineering & Technology, Karachi, Pakistan
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46
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Li H, Ai Z, Zhang L. Surface structure-dependent photocatalytic O 2 activation for pollutant removal with bismuth oxyhalides. Chem Commun (Camb) 2020; 56:15282-15296. [PMID: 33165493 DOI: 10.1039/d0cc05449f] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
The purification of water and air by semiconductor photocatalysis is a rapidly growing area for academic research and industrial innovation, featured with ambient removal of organic or inorganic pollutants by using solar light as the energy source and atmospheric O2 as the green oxidant. Both charge transfer and energy transfer from excited photocatalysts can overcome the spin-forbidden nature of O2. Layered bismuth oxyhalides are a new group of two-dimensional photocatalysts with an appealing geometric and surface structure that allows the dynamic and selective tuning of O2 activation at the surface molecular level. In this Feature Article, we specifically summarize our recent progress in selective O2 activation by engineering surface structures of bismuth oxyhalides. Then, we demonstrate selective photocatalytic O2 activation of bismuth oxyhalides for environmental control, including water decontamination, volatile organic compound oxidation and nitrogen oxide removal, as well as selective catalytic oxidations. Challenges and opportunities regarding the design of photocatalysts with satisfactory performance for potential environmental control applications are also presented.
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Affiliation(s)
- Hao Li
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Institute of Environmental & Applied Chemistry, College of Chemistry, Central China Normal University, Wuhan 430079, China.
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47
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Zhao Z, Shen B, Hu Z, Zhang J, He C, Yao Y, Guo SQ, Dong F. Recycling of spent alkaline Zn-Mn batteries directly: Combination with TiO 2 to construct a novel Z-scheme photocatalytic system. JOURNAL OF HAZARDOUS MATERIALS 2020; 400:123236. [PMID: 32947685 DOI: 10.1016/j.jhazmat.2020.123236] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Revised: 06/12/2020] [Accepted: 06/13/2020] [Indexed: 06/11/2023]
Abstract
Recycling of spent alkaline Zn-Mn batteries (S-AZMB) has always been a focus of attention in environmental and energy fields. However, the current research mostly concentrated in the recovery of purified materials, and ignores the direct reuse of S-AZMB. Herein, we propose a new concept for the first time that unpurified S-AZMB can be used as raw materials for preparation of Z-scheme photocatalytic system in combination with TiO2. A series of characterizations and experiments confirm that the combination with S-AZMB not only extends the response of TiO2 to visible light, but also significantly enhances the separation ability of photogenerated electron-hole pairs. In the toluene removal experiment, the degradation kinetic rate of Z-scheme TiO2@S-AZMB photocatalyst reaches 21.0 and 10.5 times than that of TiO2 and S-AZMB, respectively. More notably, this S-AZMB based Z-scheme photocatalyst can maintain structural and photocatalytic performance stability in cyclic catalytic reactions. We believe that this work not only expands the research concept of recycling S-AZMB, but also provides a new idea for designing highly efficient Z-scheme photocatalysts.
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Affiliation(s)
- Zhong Zhao
- Tianjin Key Laboratory of Clean Energy and Pollutant Control, School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin, 300401, PR China
| | - Boxiong Shen
- Tianjin Key Laboratory of Clean Energy and Pollutant Control, School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin, 300401, PR China.
| | - Zhenzhong Hu
- Tianjin Key Laboratory of Clean Energy and Pollutant Control, School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin, 300401, PR China
| | - Jianwei Zhang
- Tianjin Key Laboratory of Clean Energy and Pollutant Control, School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin, 300401, PR China
| | - Chuan He
- Xi'an Thermal Power Research Institute Co., Ltd., Suzhou Branch, Suzhou, 215153, PR China
| | - Yan Yao
- Xi'an Thermal Power Research Institute Co., Ltd., Suzhou Branch, Suzhou, 215153, PR China
| | - Sheng-Qi Guo
- Tianjin Key Laboratory of Clean Energy and Pollutant Control, School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin, 300401, PR China.
| | - Fan Dong
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, 611731, PR China
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48
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Liu Y, Zhang T, Li S, Zhang K, Wang X, Zhan Y, Zheng Y, Jiang L. Geometric and electronic modification of the active Fe 3+ sites of α-Fe 2O 3 for highly efficient toluene combustion. JOURNAL OF HAZARDOUS MATERIALS 2020; 398:123233. [PMID: 32768850 DOI: 10.1016/j.jhazmat.2020.123233] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2020] [Revised: 06/12/2020] [Accepted: 06/13/2020] [Indexed: 06/11/2023]
Abstract
In the present study, catalytically inactive or low-active Ti4+ (d0) or Zn2+ (d10) ions were doped to α-Fe2O3 to tune the geometric and electronic engineering for Fe active center. X-ray absorption near edge structure (XANES) and Powder X-ray diffraction (XRD) analyses coupled with density functional theory (DFT) calculation show that the added of Ti4+ could occupy the interstitial octahedral or tetrahedral sites, resulting in surface Fe2+ species are oxidized to octahedrally coordinated Fe3+. As a result, more oxygen vacancies are generated, which improve the catalytic performance for toluene combustion. On the other hand, Fe2+ was substituted by Zn2+ ion could result in the partial destruction of hematite crystal structure, forming an additional phase of ZnFe2O4, and meanwhile part of Zn2+ ions replace the octahedrally coordinated Fe3+ sites, and therefore significantly decreasing the toluene catalytic performance. Moreover, our studies demonstrate that the combustions of toluene over Fe-based catalysts involve both the MvK and L-H mechanisms.
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Affiliation(s)
- Yi Liu
- National Engineering Research Center of Chemical Fertilizer Catalyst, Fuzhou University, Fuzhou, Fujian, 350002, China
| | - Tianhua Zhang
- National Engineering Research Center of Chemical Fertilizer Catalyst, Fuzhou University, Fuzhou, Fujian, 350002, China
| | - Shusheng Li
- National Engineering Research Center of Chemical Fertilizer Catalyst, Fuzhou University, Fuzhou, Fujian, 350002, China
| | - Kai Zhang
- National Engineering Research Center of Chemical Fertilizer Catalyst, Fuzhou University, Fuzhou, Fujian, 350002, China
| | - Xiuyun Wang
- National Engineering Research Center of Chemical Fertilizer Catalyst, Fuzhou University, Fuzhou, Fujian, 350002, China.
| | - Yingying Zhan
- National Engineering Research Center of Chemical Fertilizer Catalyst, Fuzhou University, Fuzhou, Fujian, 350002, China
| | - Ying Zheng
- National Engineering Research Center of Chemical Fertilizer Catalyst, Fuzhou University, Fuzhou, Fujian, 350002, China; Department of Chemical and Biochemical Engineering, Western University, London, Ontario, N6A 6K3, Canada.
| | - Lilong Jiang
- National Engineering Research Center of Chemical Fertilizer Catalyst, Fuzhou University, Fuzhou, Fujian, 350002, China
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Nguyen TP, Tran QB, Ly QV, Thanh Hai L, Le DT, Tran MB, Ho TTT, Nguyen XC, Shokouhimehr M, Vo DVN, Lam SS, Do HT, Kim SY, Van Tung T, Van Le Q. Enhanced visible photocatalytic degradation of diclofen over N-doped TiO2 assisted with H2O2: A kinetic and pathway study. ARAB J CHEM 2020. [DOI: 10.1016/j.arabjc.2020.05.023] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
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Cui W, Li J, Chen L, Dong X, Wang H, Sheng J, Sun Y, Zhou Y, Dong F. Nature-inspired CaCO 3 loading TiO 2 composites for efficient and durable photocatalytic mineralization of gaseous toluene. Sci Bull (Beijing) 2020; 65:1626-1634. [PMID: 36659038 DOI: 10.1016/j.scib.2020.05.024] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Revised: 05/06/2020] [Accepted: 05/11/2020] [Indexed: 01/21/2023]
Abstract
The accumulation of intermediates or final products on TiO2 during photocatalytic volatile organic compounds (VOCs) degradation is typically neglected, despite the fact that it could result in the block of active sites and the deactivation of photocatalysts. Inspired from the natural formation of stalactite (CaCO3 + H2O + CO2 ↔ Ca(HCO3)2), we fabricated CaCO3 loading TiO2 composites (CCT21) to realize the spontaneously transfer of accumulated final products (CO2 and H2O). Efficient and durable performance for gaseous toluene removal has been demonstrated and the cost of photocatalyst is greatly reduced by the comparison of specific activity. The introduction of CaCO3 induces the interaction between TiO2 and CaCO3 to stimulate abundant activated electrons for the improvement on the adsorption and activation of reactants and the transformation of photogenerated carriers, and most importantly, facilitates the transfer of final products to release active sites and thus suppress the deactivation of TiO2. Furthermore, we develop a facile method to immobilize CCT21 powder on flexible support, which greatly reduces the loss of photocatalysts and correspondingly enables the practical application of TiO2-based products. Therefore, this work presents a novel nature-inspired strategy to address the challenge of deactivation, and advances the development of photocatalytic technology for environmental remediation.
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Affiliation(s)
- Wen Cui
- The Center of New Energy Materials and Technology, School of New Energy and Materials, Southwest Petroleum University, Chengdu 610500, China; Research Center for Environmental and Energy Catalysis, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 611731, China
| | - Jieyuan Li
- 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
- The Center of New Energy Materials and Technology, School of New Energy and Materials, Southwest Petroleum University, Chengdu 610500, China; Research Center for Environmental and Energy Catalysis, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 611731, China
| | - Xing'an 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
| | - 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
| | - Jianping Sheng
- Research Center for Environmental and Energy Catalysis, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 611731, China
| | - Yanjuan Sun
- School of Resources and Environment, University of Electronic Science and Technology of China, Chengdu 611731, China
| | - Ying Zhou
- The Center of New Energy Materials and Technology, School of New Energy and Materials, Southwest Petroleum University, Chengdu 610500, China
| | - Fan Dong
- The Center of New Energy Materials and Technology, School of New Energy and Materials, Southwest Petroleum University, Chengdu 610500, China; Research Center for Environmental and Energy Catalysis, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 611731, China.
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