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Liu W, Zhang J, Dai Z, Luo N, Qu J, Sun P, Li D, Liao W, Wei J, Zhang H. A novel hollow microsphere composite MnOx/PAA: effective catalyst for ozone decomposition at high humidity. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:17994-18013. [PMID: 36205873 DOI: 10.1007/s11356-022-23440-8] [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: 06/01/2022] [Accepted: 09/29/2022] [Indexed: 06/16/2023]
Abstract
Ozone air pollution poses a serious threat to human health and ecological environment. Manganese oxide (MnOx) is a popular material for ozone decomposition with excellent catalytic performance. However, the catalytic activity may be reduced under high-humidity conditions because of oxygen vacancy of MnOx from the water evaporation. In this paper, a new type of MnOx/poly(acrylic acid-co-divinylbenzene) (PAA) catalyst with MnOx supported on hollow PAA was successfully prepared, which greatly improved the ozone decomposition efficiency under high humidity. It was shown that when the acrylic acid (AA) content was more than 50%, the PAA polymer layer was hydrophilic and the ozone decomposition efficiency would keep high activity for both the low- and high-humidity conditions. The best performance of ozone decomposition was identified for the methanol reduction and AA content of 60%, in which the efficiencies reached 94.5% and 85% at 50% and 90% humidity levels, respectively. It is the synergetic effect of the hydrophilic PAA support and hollow structure that retains and improves the decomposition activity, which can absorb the water vapor molecules and increase the ozone retention time. Therefore, the hollow microsphere catalyst prepared in this paper has great potential in solving the problem of ozone air pollution.
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Affiliation(s)
- Wei Liu
- State Key Laboratory of Separation Membranes and Membrane Processes/National Center for International Joint Research on Separation Membranes, Tiangong University, Tianjin, 300387, China.
- School of Environmental Science and Engineering, Tiangong University, Tianjin, 300387, China.
- Key Laboratory of Textile Materials for Soil Treatment in Textile Industry, Tiangong University, Tianjin, 300387, China.
- Tianjin Colouroad Coatings & Chemicals Co., Ltd., Tianjin, 300457, China.
| | - Jingwen Zhang
- State Key Laboratory of Separation Membranes and Membrane Processes/National Center for International Joint Research on Separation Membranes, Tiangong University, Tianjin, 300387, China
- School of Environmental Science and Engineering, Tiangong University, Tianjin, 300387, China
- Key Laboratory of Textile Materials for Soil Treatment in Textile Industry, Tiangong University, Tianjin, 300387, China
| | - Zhao Dai
- State Key Laboratory of Separation Membranes and Membrane Processes/National Center for International Joint Research on Separation Membranes, Tiangong University, Tianjin, 300387, China
- School of Chemical Engineering, Tiangong University, Tianjin, 300387, China
| | - Ning Luo
- State Key Laboratory of Separation Membranes and Membrane Processes/National Center for International Joint Research on Separation Membranes, Tiangong University, Tianjin, 300387, China
- School of Environmental Science and Engineering, Tiangong University, Tianjin, 300387, China
- Key Laboratory of Textile Materials for Soil Treatment in Textile Industry, Tiangong University, Tianjin, 300387, China
| | - Jing Qu
- State Key Laboratory of Separation Membranes and Membrane Processes/National Center for International Joint Research on Separation Membranes, Tiangong University, Tianjin, 300387, China
- School of Environmental Science and Engineering, Tiangong University, Tianjin, 300387, China
| | - Peiyun Sun
- State Key Laboratory of Separation Membranes and Membrane Processes/National Center for International Joint Research on Separation Membranes, Tiangong University, Tianjin, 300387, China
- School of Environmental Science and Engineering, Tiangong University, Tianjin, 300387, China
- Key Laboratory of Textile Materials for Soil Treatment in Textile Industry, Tiangong University, Tianjin, 300387, China
| | - Da Li
- Tianjin Colouroad Coatings & Chemicals Co., Ltd., Tianjin, 300457, China
| | - Weilong Liao
- State Key Laboratory of Separation Membranes and Membrane Processes/National Center for International Joint Research on Separation Membranes, Tiangong University, Tianjin, 300387, China
- School of Environmental Science and Engineering, Tiangong University, Tianjin, 300387, China
- Key Laboratory of Textile Materials for Soil Treatment in Textile Industry, Tiangong University, Tianjin, 300387, China
| | - Junfu Wei
- State Key Laboratory of Separation Membranes and Membrane Processes/National Center for International Joint Research on Separation Membranes, Tiangong University, Tianjin, 300387, China
- Key Laboratory of Textile Materials for Soil Treatment in Textile Industry, Tiangong University, Tianjin, 300387, China
- School of Chemical Engineering, Tiangong University, Tianjin, 300387, China
| | - Huan Zhang
- State Key Laboratory of Separation Membranes and Membrane Processes/National Center for International Joint Research on Separation Membranes, Tiangong University, Tianjin, 300387, China
- School of Environmental Science and Engineering, Tiangong University, Tianjin, 300387, China
- Key Laboratory of Textile Materials for Soil Treatment in Textile Industry, Tiangong University, Tianjin, 300387, China
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Song G, Shi G, Chen L, Wang X, Sun J, Yu L, Xie X. Different degradation mechanisms of low-concentration ozone for MIL-100(Fe) and MIL-100(Mn) over wide humidity fluctuation. CHEMOSPHERE 2022; 308:136352. [PMID: 36088966 DOI: 10.1016/j.chemosphere.2022.136352] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2022] [Revised: 08/22/2022] [Accepted: 09/02/2022] [Indexed: 06/15/2023]
Abstract
The synergistic control of ozone and fine particulate matter is a research hotspot in the current environmental fields. Among the ozone removal, wide humidity fluctuation and low concentration dynamic adsorption are two thorny problems. In this work, MIL-100(Fe) and MIL-100(Mn), synthesized by hydrothermal and solvothermal methods respectively, were selected to investigate the degradation of flowing ozone pollutants. The samples showed different ozone degradation mechanisms, namely photocatalytic degradation and normal temperature degradation. Notably, MIL-100(Fe) exhibited more outstanding photocatalytic activity than MIL-100(Mn), while the normal temperature catalytic efficiency of MIL-100(Mn) was much superior to MIL-100(Fe). For different humidity conditions, MIL-100(Fe) has the optimal photocatalytic performance at 10% humidity, which is 38%, while MIL-100(Mn) has basically no change in normal temperature catalytic degradation efficiency at different humidity levels of 10-90%. Furthermore, the degradation mechanism was proposed by in-situ DRIFTS and ESR, which was significantly correlated with oxygen vacancy and photogenerated electron efficiency. By the aid of Temperature Programmed Desorption (TPD), a large quantity of Lewis acid sites was detected in MIL-100(Mn), which was the critical factor that the selected materials could maintain excellent normal temperature degradation performance under high humidity. This work will expand the practical application of ozone removal and improve the degradation efficiency.
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Affiliation(s)
- Guanqing Song
- State Key Lab of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai, 200050, China; University of Chinese Academy of Sciences, 19 (A) Yuquan Road, Beijing, 100049, China
| | - Gansheng Shi
- State Key Lab of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai, 200050, China
| | - Lu Chen
- State Key Lab of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai, 200050, China
| | - Xiao Wang
- State Key Lab of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai, 200050, China
| | - Jing Sun
- State Key Lab of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai, 200050, China
| | - Lei Yu
- Shandong University of Science and Technology, 17 Shenglizhuang Road, Jinan, 250031, China.
| | - Xiaofeng Xie
- State Key Lab of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai, 200050, China.
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Chen L, Zhang D, Chen Y, Liu F, Zhang J, Fu M, Wu J, Ye D. Porous stainless-steel fibers supported CuCeFeO x/Zeolite catalysts for the enhanced CO oxidation: Experimental and kinetic studies. CHEMOSPHERE 2022; 291:132778. [PMID: 34742759 DOI: 10.1016/j.chemosphere.2021.132778] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2021] [Revised: 10/31/2021] [Accepted: 11/02/2021] [Indexed: 06/13/2023]
Abstract
To develop novel catalysts of high-performance and cost-effectiveness, and to investigate the reaction kinetics of CO oxidation, ternary CuCeFeOx catalysts supported on zeolite/PSF (porous stainless-steel fibers) were synthesized for the first time. Effects of different Ce/Fe ratios, loading amounts, calcination temperatures, and reaction kinetics were investigated. Remarkably improved catalytic performance was achieved in the PSF-supported catalysts compared to the granular ones, owing to the increased mass/heat transfer efficiency and the high dispersion of active metal oxide species anchored on the zeolite layer. The Cu3Ce12Fe4-400 sample exhibited the best catalytic activity with a temperature difference in T90 of almost 40 °C lower than the worst one. Characterization results from XRD, FTIR, TEM, XPS, H2-TPR, etc. revealed that the promoted reducibility of metal oxides and formation of more oxygen vacancies significantly contributed to the enhanced catalytic activity. Furthermore, a generalized rate expression was derived from intrinsic and macro kinetic studies by assuming the conversion of CO to CO2 as the rate-determining step, in which CO oxidation over the PSF-supported catalysts followed the pseudo-first-order kinetic established by the Langmuir-Hinshelwood type mechanism.
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Affiliation(s)
- Longwen Chen
- School of Environment and Energy, South China University of Technology, Guangzhou, 510640, China; College of Light Chemical Industry and Materials Engineering, Shunde Polytechnic, Foshan, 528333, China; National Engineering Laboratory for VOCs Pollution Control Technology and Equipment (SCUT), Guangzhou, 510640, China
| | - Dong Zhang
- School of Environment and Energy, South China University of Technology, Guangzhou, 510640, China; National Engineering Laboratory for VOCs Pollution Control Technology and Equipment (SCUT), Guangzhou, 510640, China.
| | - Yanwu Chen
- College of Light Chemical Industry and Materials Engineering, Shunde Polytechnic, Foshan, 528333, China
| | - Feng Liu
- College of Light Chemical Industry and Materials Engineering, Shunde Polytechnic, Foshan, 528333, China
| | - Jun Zhang
- School of Environment and Energy, South China University of Technology, Guangzhou, 510640, China; National Engineering Laboratory for VOCs Pollution Control Technology and Equipment (SCUT), Guangzhou, 510640, China
| | - Mingli Fu
- School of Environment and Energy, South China University of Technology, Guangzhou, 510640, China; National Engineering Laboratory for VOCs Pollution Control Technology and Equipment (SCUT), Guangzhou, 510640, China
| | - Junliang Wu
- School of Environment and Energy, South China University of Technology, Guangzhou, 510640, China; National Engineering Laboratory for VOCs Pollution Control Technology and Equipment (SCUT), Guangzhou, 510640, China
| | - Daiqi Ye
- School of Environment and Energy, South China University of Technology, Guangzhou, 510640, China; National Engineering Laboratory for VOCs Pollution Control Technology and Equipment (SCUT), Guangzhou, 510640, China.
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Chen L, Zhang J, Wang J, Chen P, Fu M, Wu J, Ye D. Insight into the Improvement Effect of Nitrogen Dopant in Ag/Co 3O 4 Nanocubes for Soot Oxidation: Experimental and Theoretical Studies. JOURNAL OF HAZARDOUS MATERIALS 2021; 420:126604. [PMID: 34271450 DOI: 10.1016/j.jhazmat.2021.126604] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/20/2021] [Revised: 07/06/2021] [Accepted: 07/06/2021] [Indexed: 06/13/2023]
Abstract
Different doping amounts of N-doped Ag/Co3O4 nanocubes were synthesized for the first time for catalytic soot oxidation. The N-doped sample exhibited remarkably improved catalytic activity, of which the maximum decrease in temperature for 90% soot conversion was almost 40 ℃. Characterization results analyzed by TEM, XPS, EPR, H2-TPR, O2-TPD, etc. revealed that the incorporation of N atoms can alter the electronic structure, leading to the generation of more oxygen vacancies and enhancement of lattice oxygen mobility. Meanwhile, larger surface area, rugged morphology and promoted reducibility also contribute to the performance improvement. DFT calculations on the differential charge density, Gibbs free energy, etc. were performed to investigate the intrinsic reasons on an atomic level. Due to the relatively higher electronegativity, N dopant could be an electron-appealing center to promote efficient electron transfer, resulting in the redistribution of charge density and formation of conductive Co-N bonds. This variation in electronic structure favors lowering the formation energy of oxygen vacancies and facilitating the activation of the lattice oxygen originated from the highly hybridized Co-O bonds, which ultimately reduces the activation barriers for reactants/intermediates and accelerates the reaction kinetics. This study evidenced that N doping could be an effective strategy to promote catalytic soot oxidation.
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Affiliation(s)
- Longwen Chen
- School of Environment and Energy, South China University of Technology, Guangzhou 510640, China; Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control (SCUT), Guangzhou 510640, China; National Engineering Laboratory for VOCs Pollution Control Technology and Equipment (SCUT), Guangzhou 510640, China.
| | - Jun Zhang
- School of Environment and Energy, South China University of Technology, Guangzhou 510640, China; Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control (SCUT), Guangzhou 510640, China; National Engineering Laboratory for VOCs Pollution Control Technology and Equipment (SCUT), Guangzhou 510640, China
| | - Jing Wang
- School of Environment and Energy, South China University of Technology, Guangzhou 510640, China; Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control (SCUT), Guangzhou 510640, China; National Engineering Laboratory for VOCs Pollution Control Technology and Equipment (SCUT), Guangzhou 510640, China
| | - Peirong Chen
- School of Environment and Energy, South China University of Technology, Guangzhou 510640, China; Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control (SCUT), Guangzhou 510640, China; National Engineering Laboratory for VOCs Pollution Control Technology and Equipment (SCUT), Guangzhou 510640, China
| | - Mingli Fu
- School of Environment and Energy, South China University of Technology, Guangzhou 510640, China; Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control (SCUT), Guangzhou 510640, China; National Engineering Laboratory for VOCs Pollution Control Technology and Equipment (SCUT), Guangzhou 510640, China
| | - Junliang Wu
- School of Environment and Energy, South China University of Technology, Guangzhou 510640, China; Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control (SCUT), Guangzhou 510640, China; National Engineering Laboratory for VOCs Pollution Control Technology and Equipment (SCUT), Guangzhou 510640, China
| | - Daiqi Ye
- School of Environment and Energy, South China University of Technology, Guangzhou 510640, China; Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control (SCUT), Guangzhou 510640, China; National Engineering Laboratory for VOCs Pollution Control Technology and Equipment (SCUT), Guangzhou 510640, China.
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Chen L, Gonze E, Ondarts M, Outin J, Gonthier Y. Electrostatic precipitator for fine and ultrafine particle removal from indoor air environments. Sep Purif Technol 2020. [DOI: 10.1016/j.seppur.2020.116964] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Wang S, Zhu YQ, Zhang Y, Wang B, Yan H, Liu W, Lin Y. Manganese-based layered double hydroxide nanoparticles as highly efficient ozone decomposition catalysts with tunable valence state. NANOSCALE 2020; 12:12817-12823. [PMID: 32538395 DOI: 10.1039/d0nr02796k] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Manganese oxides are well explored effective ozone decomposition catalysts, but the accumulation of oxygen trapped on their surfaces and high valence state restrict their catalyst efficiency. Herein, we report manganese based layered double hydroxide (LDH) catalysts with different average oxidation states (AOS) of Mn. MgMnAl-LDH catalysts show large specific surface area, abundant oxygen vacancies, stable structure and excellent catalytic ozone decomposition performance. The valence state of Mn can be tuned by adjusting the metallic element ratio in the LDH matrix, and a catalyst with AOS of only 2.3 is acquired. The impacts of the valence states of Mn on the catalytic ozone decomposition process were further studied by density functional theory (DFT) calculations. It is found that the Mn2+ facilitates the desorption of generated oxygen on the surface of LDHs, while Mn3+ and Mn4+ contribute to the dissociation of adsorbed ozone.
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Affiliation(s)
- Siyu Wang
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China.
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Zhang S, Shen X, Liang J. Double dielectric barrier discharge cells for promoting the catalytic degradation of volatile organic compound released by industrial processes. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:19930-19941. [PMID: 31090006 DOI: 10.1007/s11356-019-05372-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2018] [Accepted: 05/03/2019] [Indexed: 06/09/2023]
Abstract
In this study, the recycling of gas flow was added to oxidize mixture (toluene and xylene) in the post-plasma catalysis (PPC) system, and the MnOx catalysts using impregnation method were used to further oxidize the VOC mixture. The circulation and catalysts were of enhancement for the plasma degradation on both toluene and xylene. The improvement of CO2 selectivity and the reduction of NO, NO2, and O3 were 64.4%, 92.0%, 62.2%, and 51.9%, respectively. The fresh and used catalysts were characterized for the ozone decomposition and mixture degradation in the NTP-REC-CATAL system with the 15 wt% loading amount of catalysts. The results showed that OH groups, lattice oxygen, and manganese sites were potential and significant for the catalytic ability for O3 and mixture conversion. Aldehyde was detected from FT-IR characterization after treating, which indicates that it is the main intermediate NTP-REC-CATAL process. The air plasma was employed to reactive catalytic activity.
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Affiliation(s)
- Shuo Zhang
- School of Science, Shenyang University of Technology, Shenyang, 110870, People's Republic of China
| | - Xinjun Shen
- School of Science, Shenyang University of Technology, Shenyang, 110870, People's Republic of China
| | - Jiyan Liang
- School of Science, Shenyang University of Technology, Shenyang, 110870, People's Republic of China.
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