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Wang D, Luo K, Tian H, Cheng H, Giannakis S, Song Y, He Z, Wang L, Song S, Fang J, Ma J. Transforming Plain LaMnO 3 Perovskite into a Powerful Ozonation Catalyst: Elucidating the Mechanisms of Simultaneous A and B Sites Modulation for Enhanced Toluene Degradation. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2024; 58:12167-12178. [PMID: 38920332 DOI: 10.1021/acs.est.4c00809] [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: 06/27/2024]
Abstract
Herein, we propose preferential dissolution paired with Cu-doping as an effective method for synergistically modulating the A- and B-sites of LaMnO3 perovskite. Through Cu-doping into the B-sites of LaMnO3, specifically modifying the B-sites, the double perovskite La2CuMnO6 was created. Subsequently, partial La from the A-sites of La2CuMnO6 was etched using HNO3, forming novel La2CuMnO6/MnO2 (LCMO/MnO2) catalysts. The optimized catalyst, featuring an ideal Mn:Cu ratio of 4.5:1 (LCMO/MnO2-4.5), exhibited exceptional catalytic ozonation performance. It achieved approximately 90% toluene degradation with 56% selectivity toward CO2, even under ambient temperature (35 °C) and a relatively humid environment (45%). Modulation of A-sites induced the elongation of Mn-O bonds and decrease in the coordination number of Mn-O (from 6 to 4.3) in LCMO/MnO2-4.5, resulting in the creation of abundant multivalent Mn and oxygen vacancies. Doping Cu into B-sites led to the preferential chemisorption of toluene on multivalent Cu (Cu(I)/Cu(II)), consistent with theoretical predictions. Effective electronic supplementary interactions enabled the cycling of multiple oxidation states of Mn for ozone decomposition, facilitating the production of reactive oxygen species and the regeneration of oxygen vacancies. This study establishes high-performance perovskites for the synergistic regulation of O3 and toluene, contributing to cleaner and safer industrial activities.
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Affiliation(s)
- Da Wang
- Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou 310032, China
- School of Environment Science and Spatial Informatics, China University of Mining and Technology, Xuzhou 221116, China
| | - Kai Luo
- Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou 310032, China
| | - Haole Tian
- Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou 310032, China
| | - Haijun Cheng
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Stefanos Giannakis
- E.T.S. de Ingenieros de Caminos, Canales Y Puertos, Departamento de Ingeniería Civil: Hidráulica, Energía Y Medio Ambiente, Unidad Docente Ingeniería Sanitaria, Universidad Politécnica de Madrid, C/Profesor Aranguren, S/n, ES-28040 Madrid, Spain
| | - Yang Song
- School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou, 510006 Guangdong, China
| | - Zhiqiao He
- Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou 310032, China
| | - Lizhang Wang
- School of Environment Science and Spatial Informatics, China University of Mining and Technology, Xuzhou 221116, China
| | - Shuang Song
- Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou 310032, China
| | - Jingyun Fang
- Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, School of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou 510275, China
| | - Jun Ma
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China
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Einaga H, Zheng X. Fundamental insights and recent advances in catalytic oxidation processes using ozone for the control of volatile organic compounds. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:43540-43560. [PMID: 38909152 DOI: 10.1007/s11356-024-34004-3] [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: 03/07/2024] [Accepted: 06/11/2024] [Indexed: 06/24/2024]
Abstract
The development of technologies for highly efficient treatment of emissions containing low concentrations of volatile organic compounds (VOCs) remains an important challenge. Catalytic oxidation with ozone (catalytic ozonation) is useful for the oxidative decomposition of VOCs, particularly aromatic compounds, under ambient temperature conditions. Only inexpensive transition metal oxides are required as catalysts, and Mn-based catalysts are widely used for catalytic ozonation. This review describes the oxidation reaction mechanisms, reaction pathways of aromatic hydrocarbons, and dependence of the catalytic ozonation activity on the reaction conditions. The reasons why Mn oxides are effective in catalytic ozonation are also explained. The structure of the catalytic active sites and the types of supporting materials contributing to the reaction are also discussed in detail, with the aim of establishing a VOC control technology. In addition, recent progress in catalytic oxidation processes using ozone as an oxidant has been outlined, focusing on catalyst materials and reaction conditions.
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Affiliation(s)
- Hisahiro Einaga
- Department of Advanced Materials Science and Engineering, Faculty of Engineering Sciences, Kyushu University, Kasuga, Fukuoka, 816-8580, Japan.
- Department of Interdisciplinary Engineering Sciences, Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Kasuga, Fukuoka, 816-8580, Japan.
| | - Xuerui Zheng
- Department of Advanced Materials Science and Engineering, Faculty of Engineering Sciences, Kyushu University, Kasuga, Fukuoka, 816-8580, Japan
- Department of Interdisciplinary Engineering Sciences, Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Kasuga, Fukuoka, 816-8580, Japan
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3
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Zhang M, Zhang S, Wang Z, Hu J, Lian Z, Zhong Q. Enhanced water resistance mechanism in Ag-Hollandite for catalytic ozone decomposition. JOURNAL OF HAZARDOUS MATERIALS 2024; 465:133481. [PMID: 38219590 DOI: 10.1016/j.jhazmat.2024.133481] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2023] [Revised: 12/22/2023] [Accepted: 01/07/2024] [Indexed: 01/16/2024]
Abstract
Catalytic ozone (O3) decomposition at ambient temperature is an efficient method to mitigate O3 pollution. However, practical application is hindered by the poor water resistance of catalysts. Herein, Ag-Hollandite (Ag-HMO) with varying Ag+ content was synthesized. Catalysts with more Ag+ exhibited improved efficiency and water-resistance, with the optimal one maintaining 98% O3 conversion at 70% relative humidity (RH) within 8 h. Physicochemical characterizations revealed that Ag+ had entered the tunnel of OMS-2, facilitating oxygen species removal. Notably, enhanced H2O desorption and the complete inhibition of chemisorbed water formation on Ag-HMO were the primary reasons for its high-efficiency O3 conversion across a wide humidity range. The underlying mechanism arises from the charge redistribution induced by the Ag-O interaction within the tunnel, which reduces acidity and modulates hydrophilicity. This study aims to contribute insights for designing catalysts with higher water-resistance.
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Affiliation(s)
- Mingjia Zhang
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, PR China
| | - Shule Zhang
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, PR China.
| | - Zimai Wang
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, PR China
| | - Jiajun Hu
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, PR China
| | - Zheng Lian
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, PR China
| | - Qin Zhong
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, PR China
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4
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Li Y, Li H, Zhao B, Ma Y, Liang P, Sun T. Synthetic effect of supports in Cu-Mn-doped oxide catalysts for promoting ozone decomposition under humid environment. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:102880-102893. [PMID: 37670093 DOI: 10.1007/s11356-023-29642-y] [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: 04/30/2023] [Accepted: 08/29/2023] [Indexed: 09/07/2023]
Abstract
The escalating levels of surface ozone concentration pose detrimental effects on public health and the environment. Catalytic decomposition presents an optimal solution for surface ozone removal. Nevertheless, catalyst still encounters challenges such as poisoning and deactivation in the high humidity environment. The influence of support on catalytic ozone decomposition was examined at a gas hourly space velocity of 300 L·g-1·h-1 and 85% relative humidity under ambient temperature using Cu-Mn-doped oxide catalysts synthesized via a straightforward coprecipitation method. Notably, the Cu-Mn/SiO2 catalyst exhibited remarkable performance on ozone decomposition, achieving 98% ozone conversion and stability for 10 h. Further characterization analysis indicated that the catalyst's enhanced water resistance and activity could be attributed to factors such as an increased number of active sites, a large surface area, abundant active oxygen species, and a lower Mn oxidation state. The catalytic environment created by mixed oxides can offer a clearer understanding of their synergistic effects on catalytic ozone decomposition, providing significant insights into the development of water-resistant catalysts with superior performance.
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Affiliation(s)
- Yunhe Li
- Marine Engineering College, Dalian Maritime University, Dalian, 116026, China
| | - Hao Li
- Environmental Science and Engineering College, Dalian Maritime University, Dalian, 116026, China
| | - Baogang Zhao
- Marine Engineering College, Dalian Maritime University, Dalian, 116026, China.
| | - Yanming Ma
- Marine Engineering College, Dalian Maritime University, Dalian, 116026, China
| | - Peiyuan Liang
- Marine Engineering College, Dalian Maritime University, Dalian, 116026, China
| | - Tianjun Sun
- Marine Engineering College, Dalian Maritime University, Dalian, 116026, China
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Zhang B, Shen Y, Liu B, Ji J, Dai W, Huang P, Zhang D, Li G, Xie R, Huang H. Boosting Ozone Catalytic Oxidation of Toluene at Room Temperature by Using Hydroxyl-Mediated MnO x/Al 2O 3 Catalysts. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:7041-7050. [PMID: 37078822 DOI: 10.1021/acs.est.2c08867] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Ozone catalytic oxidation (OZCO) has gained great interest in environmental remediation while it still faces a big challenge during the deep degradation of refractory volatile organic compounds (VOCs) at room temperature. Hydroxylation of the catalytic surface provides a new strategy for regulating the catalytic activity to boost VOC degradation. Herein, OZCO of toluene at room temperature over hydroxyl-mediated MnOx/Al2O3 catalysts was originally demonstrated. Specifically, a novel hydroxyl-mediated MnOx/Al2O3 catalyst was developed via the in situ AlOOH reconstruction method and used for toluene OZCO. The toluene degradation performance of MnOx/Al2O3 was significantly superior to those of most of the state-of-the-art catalysts, and 100% toluene was removed with an excellent mineralization rate (82.3%) and catalytic stability during OZCO. ESR and in situ DRIFTs results demonstrated that surface hydroxyl groups (HGs) greatly improved the reactive oxygen species generation, thus dramatically accelerating the benzene ring breakage and deep mineralization. Furthermore, HGs provided anchoring sites for uniformly dispersing MnOx and greatly enhanced toluene adsorption and ozone activation. This work paves a way for deep decomposition of aromatic VOCs at room temperature.
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Affiliation(s)
- Boge Zhang
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510006, P. R. China
| | - Yongjie Shen
- Department of Chemistry, College of Sciences, Shanghai University, Shanghai 200444, P. R. China
| | - Biyuan Liu
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510006, P. R. China
| | - Jian Ji
- Institute of Chemical Engineering, Guangdong Academy of Sciences, Guangzhou 510665, China
| | - Wenjing Dai
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510006, P. R. China
| | - Pingli Huang
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510006, P. R. China
| | - Dengsong Zhang
- Department of Chemistry, College of Sciences, Shanghai University, Shanghai 200444, P. R. China
| | - Guangqin Li
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510006, P. R. China
| | - Ruijie Xie
- 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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6
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Ma T, Xu C, Liu F, Feng Y, Zhang W, Tang W, Zhang H, Li X, Nie Y, Zhao S, Li Y, Ji D, Fang Z, He W, Guo K. Selective epoxidation and allylic oxidation of olefins catalyzed by BEA-Ti and porphyrin catalysts. MOLECULAR CATALYSIS 2023. [DOI: 10.1016/j.mcat.2023.113074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/29/2023]
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7
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Lu Y, Deng H, Pan T, Liao X, Zhang C, He H. Effective Toluene Ozonation over δ-MnO 2: Oxygen Vacancy-Induced Reactive Oxygen Species. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:2918-2927. [PMID: 36691294 DOI: 10.1021/acs.est.2c07661] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
To improve the reactivity and lifetime of catalysts in the catalytic ozonation of toluene, a simple strategy was provided to regulate the morphology and microstructure of δ-MnO2 via the hydrothermal reaction temperature. The effects of the reaction temperature and the ozone to toluene concentration ratio on the catalyst performance were investigated. The optimized MnO2-260 catalyst prepared at the limiting hydrothermal temperature (260 °C) showed high catalytic activity (XTol = 95%) and excellent stability (1200 min) at the approximately ambient temperature of 40 °C, which was superior to the results in previous studies. The structure and morphology of δ-MnO2 were characterized by extended X-ray absorption fine structure, X-ray diffraction, scanning electron microscopy, positron annihilation lifetime spectroscopy, electron spin resonance, and other techniques. Experimental results and density functional theory calculations were in agreement that surface oxygen vacancy clusters, especially surface oxygen dimer vacancies, are critical in ozone activation. Oxygen vacancies can facilitate the adsorption and activation of O3 to generate reactive oxygen species (ROS, including 1O2, O2-, and •OH), leading to superior ozonation activity to degrade toluene and intermediates. Meanwhile, free radical detection and scavenger tests indicated that •OH is the primary ROS during toluene ozonation rather than 1O2 or O2-.
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Affiliation(s)
- Yuqin Lu
- Center for Excellence in Regional Atmospheric Environment, Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Hua Deng
- Center for Excellence in Regional Atmospheric Environment, Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Tingting Pan
- Center for Excellence in Regional Atmospheric Environment, Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xu Liao
- Center for Excellence in Regional Atmospheric Environment, Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
| | - Changbin Zhang
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Hong He
- Center for Excellence in Regional Atmospheric Environment, Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
- University of Chinese Academy of Sciences, Beijing 100049, China
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
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8
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Wan X, Wang L, Zhang S, Shi H, Niu J, Wang G, Li W, Chen D, Zhang H, Zhou X, Wang W. Ozone Decomposition below Room Temperature Using Mn-based Mullite YMn 2O 5. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2022; 56:8746-8755. [PMID: 35617124 DOI: 10.1021/acs.est.1c08922] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
A super-low-temperature ozone decomposition is realized without energy consumption on a ternary oxide catalyst mullite YMn2O5 for the first time. The YMn2O5 oxide catalyzed ozone decomposition from a low temperature of -40 °C with 29% conversion (reaction rate: 1534.2 μmol g-1 h-1) and quickly reached 100% (5459.5 μmol g-1 h-1) when warmed up to -5 °C. The superior low-temperature performance over YMn2O5 could surpass that of the reported ozone decomposition catalysts. The structure and element valence characterizations confirmed that YMn2O5 remained the same after 100 h of room-temperature reaction, indicating excellent durability of the catalyst. O2-TPD (O2-temperature-programmed desorption) showed that the active sites are the Mn3+ sites bonded with singly coordinated oxygen on the surface. Combined with in situ Raman measurements and density functional theory calculations, we found that the ozone decomposition reaction on YMn2O5 showed a barrier of only 0.29 eV, following the Eley-Rideal (E-R) mechanism with a rate-limiting step of intermediate O22- desorption. The low barrier minimizes the accumulation of intermediate products and realizes the fast O3 decomposition even at super-low temperatures. Fundamentally, the moderate Mn-O bonding strength in the low-symmetry ternary oxides is crucial to produce singly coordinated active species on the surface responsible for the efficient ozone degradation at low temperatures.
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Affiliation(s)
- Xiang Wan
- College of Electronic Information and Optical Engineering, Nankai University, Tianjin 300071, China
| | - Lijing Wang
- College of Electronic Information and Optical Engineering, Nankai University, Tianjin 300071, China
| | - Shen Zhang
- College of Electronic Information and Optical Engineering, Nankai University, Tianjin 300071, China
| | - Haozhe Shi
- College of Electronic Information and Optical Engineering, Nankai University, Tianjin 300071, China
| | - Juntao Niu
- Department of Otorhinolaryngology, Head and Neck Surgery, the Second Hospital, Tianjin Medical University, Tianjin 300211, China
| | - Gen Wang
- State Environmental Protection Key Laboratory of Odor Pollution Control, Tianjin Academy of Eco-environment Sciences, Tianjin 300191, China
| | - Weifang Li
- State Environmental Protection Key Laboratory of Odor Pollution Control, Tianjin Academy of Eco-environment Sciences, Tianjin 300191, China
| | - Da Chen
- Key Laboratory of Civil Aviation Thermal Hazards Prevention and Emergency Response, Civil Aviation University of China, Tianjin 300300, China
| | - Haijun Zhang
- Key Laboratory of Civil Aviation Thermal Hazards Prevention and Emergency Response, Civil Aviation University of China, Tianjin 300300, China
| | - Xiaomeng Zhou
- Key Laboratory of Civil Aviation Thermal Hazards Prevention and Emergency Response, Civil Aviation University of China, Tianjin 300300, China
| | - Weichao Wang
- College of Electronic Information and Optical Engineering, Nankai University, Tianjin 300071, China
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9
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Wu M, Huang H, Leung DYC. A review of volatile organic compounds (VOCs) degradation by vacuum ultraviolet (VUV) catalytic oxidation. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 307:114559. [PMID: 35066195 DOI: 10.1016/j.jenvman.2022.114559] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2021] [Revised: 01/10/2022] [Accepted: 01/16/2022] [Indexed: 06/14/2023]
Abstract
Volatile organic compounds (VOCs), one of the most important gaseous air pollutants, are getting more and more attention, and a lot of technologies have been studied and applied to eliminate VOCs emissions. Advanced oxidation processes (AOPs) are considered as one of the most promising techniques used for the degradation of VOCs. Vacuum ultraviolet (VUV) catalytic oxidation system is a typical composite AOPs system involving several processes such as VUV photodegradation, photocatalytic oxidation (PCO), ozone catalytic oxidation (OZCO) and their combinations. VUV based catalytic oxidation processes have been intensively studied for degrading VOCs. This review summarizes the recent studies on the use of VUV catalytic oxidation for degrading VOCs. All the processes involved in VUV catalytic oxidation and their combinations have been reviewed. Studies of VOCs degradation by VUV catalytic oxidation can be generally divided into two aspects: developments of catalysts and mechanistic studies. Principles of different processes, strategies of catalyst development and reaction mechanism are summarized in this review. Two directions of prospective future work were also proposed.
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Affiliation(s)
- Muyan Wu
- Department of Mechanical Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong
| | - Haibao Huang
- School of Environmental Science and Engineering, Sun Yat-sen University, China
| | - Dennis Y C Leung
- Department of Mechanical Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong.
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10
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Ozone-assisted diesel soot combustion over Mn2O3 catalysts: A tandem work of different reactive phases. J Catal 2022. [DOI: 10.1016/j.jcat.2022.02.022] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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11
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Shao M, Hong W, Zhu T, Jiang X, Sun Y, Hou S. High performance ozone decomposition over MnAl-based mixed oxide catalysts derived from layered double hydroxides. RSC Adv 2022; 12:26834-26845. [PMID: 36320860 PMCID: PMC9490808 DOI: 10.1039/d2ra04308d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Accepted: 09/09/2022] [Indexed: 11/29/2022] Open
Abstract
Mesoporous and dispersed MnAl-based mixed metal oxide catalysts (MnxAlO) were fabricated via the calcination of layered double hydroxide (LDH) precursors prepared by the coprecipitation method. Their physiochemical properties were characterized and their catalytic activities for ozone decomposition were evaluated. The results indicate that the prepared MnxAlO catalysts have excellent catalytic activity owing to their large specific surface area, abundant surface oxygen vacancies and lower average Mn oxidation states. The Mn/Al atomic ratio and calcination temperature are found to significantly affect the textural properties and catalytic activity for ozone decomposition. The Mn2AlO-400 catalyst (Mn/Al = 2, calcined at 400 °C) exhibited 84.8% ozone conversion after 8 h reaction under an initial ozone concentration of 45 ± 2 ppm, 30 ± 1 °C, a relative humidity of 50% ± 3%, and a space velocity of 550 000 h−1. The results also show that the catalytic activity of Mn2AlO-400, which was deactivated owing to the accumulation of oxygen-related intermediates, was recovered by calcination at 400 °C under a N2 atmosphere for 1 h. A possible reason for catalyst deactivation and regeneration is proposed. This work provides a facile method for fabricating MnxAlO catalysts with excellent characteristics to achieve better catalytic activity, which are promising candidates for practical ozone decomposition. Mesoporous and highly dispersed MnAl-based mixed metal oxide catalysts (MnxAlO) were fabricated via the calcination of layered double hydroxides (LDHs), which presented excellent catalytic activity for ozone decomposition.![]()
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Affiliation(s)
- Mingpan Shao
- School of Space and Environment, Beihang University, Beijing 100191, China
| | - Wei Hong
- School of Space and Environment, Beihang University, Beijing 100191, China
| | - Tianle Zhu
- School of Space and Environment, Beihang University, Beijing 100191, China
| | - Xinxin Jiang
- School of Space and Environment, Beihang University, Beijing 100191, China
| | - Ye Sun
- School of Space and Environment, Beihang University, Beijing 100191, China
| | - Shiyu Hou
- School of Space and Environment, Beihang University, Beijing 100191, China
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12
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Yang R, Guo Z, Cai L, Zhu R, Fan Y, Zhang Y, Han P, Zhang W, Zhu X, Zhao Q, Zhu Z, Chan CK, Zeng Z. Investigation into the Phase-Activity Relationship of MnO 2 Nanomaterials toward Ozone-Assisted Catalytic Oxidation of Toluene. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2021; 17:e2103052. [PMID: 34719844 DOI: 10.1002/smll.202103052] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2021] [Revised: 09/06/2021] [Indexed: 06/13/2023]
Abstract
Manganese dioxide (MnO2 ), with naturally abundant crystal phases, is one of the most active candidates for toluene degradation. However, it remains ambiguous and controversial of the phase-activity relationship and the origin of the catalytic activity of these multiphase MnO2 . In this study, six types of MnO2 with crystal phases corresponding to α-, β-, γ-, ε-, λ-, and δ-MnO2 are prepared, and their catalytic activity toward ozone-assisted catalytic oxidation of toluene at room temperature are studied, which follow the order of δ-MnO2 > α-MnO2 > ε-MnO2 > γ-MnO2 > λ-MnO2 > β-MnO2 . Further investigation of the specific oxygen species with the toluene oxidation activity indicates that high catalytic activity of MnO2 is originated from the rich oxygen vacancy and the strong mobility of oxygen species. This work illustrates the important role of crystal phase in determining the oxygen vacancies' density and the mobility of oxygen species, thus influencing the catalytic activity of MnO2 catalysts, which sheds light on strategies of rational design and synthesis of multiphase MnO2 catalysts for volatile organic pollutants' (VOCs) degradation.
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Affiliation(s)
- Ruijie Yang
- State Key Lab of Urban Water Resource and Environment, School of Civil and Environmental Engineering, Harbin Institute of Technology Shenzhen, Shenzhen, 518055, P. R. China
- Department of Materials Science and Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong, 999077, P. R. China
| | - Zhongjie Guo
- State Key Lab of Urban Water Resource and Environment, School of Civil and Environmental Engineering, Harbin Institute of Technology Shenzhen, Shenzhen, 518055, P. R. China
- Shenzhen Key Laboratory of Organic Pollution Prevention and Control, Harbin Institute of Technology (Shenzhen), Shenzhen, 518055, P. R. China
| | - Lixin Cai
- State Key Lab of Urban Water Resource and Environment, School of Civil and Environmental Engineering, Harbin Institute of Technology Shenzhen, Shenzhen, 518055, P. R. China
- Shenzhen Key Laboratory of Organic Pollution Prevention and Control, Harbin Institute of Technology (Shenzhen), Shenzhen, 518055, P. R. China
| | - Rongshu Zhu
- State Key Lab of Urban Water Resource and Environment, School of Civil and Environmental Engineering, Harbin Institute of Technology Shenzhen, Shenzhen, 518055, P. R. China
- Shenzhen Key Laboratory of Organic Pollution Prevention and Control, Harbin Institute of Technology (Shenzhen), Shenzhen, 518055, P. R. China
| | - Yingying Fan
- Department of Materials Science and Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong, 999077, P. R. China
| | - Yuefeng Zhang
- Department of Materials Science and Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong, 999077, P. R. China
| | - Pingping Han
- State Key Lab of Urban Water Resource and Environment, School of Civil and Environmental Engineering, Harbin Institute of Technology Shenzhen, Shenzhen, 518055, P. R. China
- Shenzhen Key Laboratory of Organic Pollution Prevention and Control, Harbin Institute of Technology (Shenzhen), Shenzhen, 518055, P. R. China
| | - Wanjian Zhang
- State Key Lab of Urban Water Resource and Environment, School of Civil and Environmental Engineering, Harbin Institute of Technology Shenzhen, Shenzhen, 518055, P. R. China
- Shenzhen Key Laboratory of Organic Pollution Prevention and Control, Harbin Institute of Technology (Shenzhen), Shenzhen, 518055, P. R. China
| | - Xiangang Zhu
- State Key Lab of Urban Water Resource and Environment, School of Civil and Environmental Engineering, Harbin Institute of Technology Shenzhen, Shenzhen, 518055, P. R. China
- Shenzhen Key Laboratory of Organic Pollution Prevention and Control, Harbin Institute of Technology (Shenzhen), Shenzhen, 518055, P. R. China
| | - Qitong Zhao
- State Key Lab of Urban Water Resource and Environment, School of Civil and Environmental Engineering, Harbin Institute of Technology Shenzhen, Shenzhen, 518055, P. R. China
- Shenzhen Key Laboratory of Organic Pollution Prevention and Control, Harbin Institute of Technology (Shenzhen), Shenzhen, 518055, P. R. China
| | - Zhenye Zhu
- State Key Lab of Urban Water Resource and Environment, School of Civil and Environmental Engineering, Harbin Institute of Technology Shenzhen, Shenzhen, 518055, P. R. China
- Shenzhen Key Laboratory of Organic Pollution Prevention and Control, Harbin Institute of Technology (Shenzhen), Shenzhen, 518055, P. R. China
| | - Chak Keung Chan
- School of Energy and Environment, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong, 999077, P. R. China
| | - Zhiyuan Zeng
- Department of Materials Science and Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong, 999077, P. R. China
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13
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Ma J, Cao R, Dang Y, Wang J. A recent progress of room–temperature airborne ozone decomposition catalysts. CHINESE CHEM LETT 2021. [DOI: 10.1016/j.cclet.2021.03.031] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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14
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Wei L, Chen H, Wei Y, Jia J, Zhang R. Ce-promoted Mn/ZSM-5 catalysts for highly efficient decomposition of ozone. J Environ Sci (China) 2021; 103:219-228. [PMID: 33743904 DOI: 10.1016/j.jes.2020.10.008] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Revised: 10/12/2020] [Accepted: 10/13/2020] [Indexed: 06/12/2023]
Abstract
Manganese oxides supported by ZSM-5 zeolite (Mn/ZSM-5) as well as their further modified by Ce promoter were achieved by simple impregnation method for ozone catalytic decomposition. The yCe20Mn/ZSM-5-81 catalyst with 8% Ce loading showed the highest catalytic activity at relative humidity of 50% and a space velocity of 360 L/(g × hr), giving 93% conversion of 600 ppm O3 after 5 hr. Moreover, this sample still maintained highly activity and stability in humid air with 50%-70% relative humidity. Series of physicochemical characterization including X-ray diffraction, temperature-programmed technology (NH3-TPD and H2-TPR), X-ray photoelectron spectroscopy and oxygen isotopic exchange were introduced to disclose the structure-performance relationship. The results indicated that moderate Si/Al ratio (81) of zeolite support was beneficial for ozone decomposition owing to the synergies of acidity and hydrophobicity. Furthermore, compared with 20Mn/ZSM-5-81, Ce doping could enhance the amount of low valance manganese (such as Mn2+ and Mn3+). Besides, the Ce3+/Ce4+ ratio of 8Ce20Mn/ZSM-5-81 sample was higher than that of 4Ce20Mn/ZSM-5-81. Additionally, the synergy between the MnOx and CeO2 could easily transfer electron via the redox cycle, thus resulting in an increased reducibility at low temperatures and high concentration of surface oxygen. This study provides important insights to the utilization of porous zeolite with high surface area to disperse active component of manganese for ozone decomposition.
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Affiliation(s)
- Linlin Wei
- State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Energy Environmental Catalysis, Beijing University of Chemical Technology, Beijing 100029, PR China
| | - Hongxia Chen
- State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Energy Environmental Catalysis, Beijing University of Chemical Technology, Beijing 100029, PR China
| | - Ying Wei
- State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Energy Environmental Catalysis, Beijing University of Chemical Technology, Beijing 100029, PR China
| | - Jingbo Jia
- State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Energy Environmental Catalysis, Beijing University of Chemical Technology, Beijing 100029, PR China.
| | - Runduo Zhang
- State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Energy Environmental Catalysis, Beijing University of Chemical Technology, Beijing 100029, PR China.
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15
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16
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Abstract
Volatile organic compounds (VOCs) have a negative effect on both humans and the environment; therefore, it is crucial to minimize their emission. The conventional solution is the catalytic oxidation of VOCs by air; however, in some cases this method requires relatively high temperatures. Thus, the oxidation of short-chain alkanes, which demonstrate the lowest reactivity among VOCs, starts at 250–350 °C. This research deals with the ozone catalytic oxidation (OZCO) of alkanes at temperatures as low as 25–200 °C using an alumina-supported manganese oxide catalyst. Our data demonstrate that oxidation can be significantly accelerated in the presence of a small amount of O3. In particular, it was found that n-C4H10 can be readily oxidized by an air/O3 mixture over the Mn/Al2O3 catalyst at temperatures as low as 25 °C. According to the characterization data (SEM-EDX, XRD, H2-TPR, and XPS) the superior catalytic performance of the Mn/Al2O3 catalyst in OZCO stems from a high concentration of Mn2O3 species and oxygen vacancies.
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17
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Reddy KHP, Kim BS, Lam SS, Jung SC, Song J, Park YK. Effective toluene oxidation under ozone over mesoporous MnO x/γ-Al 2O 3 catalyst prepared by solvent deficient method: Effect of Mn precursors on catalytic activity. ENVIRONMENTAL RESEARCH 2021; 195:110876. [PMID: 33592225 DOI: 10.1016/j.envres.2021.110876] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2020] [Revised: 02/01/2021] [Accepted: 02/09/2021] [Indexed: 06/12/2023]
Abstract
In this study, the role of manganese precursors in mesoporous (meso) MnOx/γ-Al2O3 catalysts was examined systematically for toluene oxidation under ozone at ambient temperature (20 °C). The meso MnOx/γ-Al2O3 catalysts developed with Mn(CH3COO)2, MnCl2, Mn(NO3)2.4H2O and MnSO4 were prepared by an innovative single step solvent-deficient method (SDM); the catalysts were labeled as MnOx/Al2O3(A), MnOx/Al2O3(C), MnOx/Al2O3(N), and MnOx/Al2O3(S), respectively. Among all, MnOx/Al2O3(C) showed superior performance both in toluene removal (95%) as well as ozone decomposition (88%) followed by acetate, nitrate and sulphated precursor MnOx/Al2O3. The superior performance of MnOx/Al2O3(C) in the oxidation of toluene to COx is associated with the ozone decomposition over highly dispersed MnOx in which extremely active oxygen radicals (O2-, O22- and O-) are generated to enhance the oxidation ability of the catalysts greatly. In addition, toluene adsorption over acid support played a vital role in this reaction. Hence, the properties such as optimum Mn3+/Mn4+ ratio, acidic sites, and smaller particle size (≤2 nm) examined by XPS, TPD of NH3, and TEM results are playing vital role in the present study. In summary, the MnOx/Al2O3 (C) catalyst has great potential in environmental applications particularly for the elimination of volatile organic compounds with low loading of manganese developed by SDM.
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Affiliation(s)
| | - Beom-Sik Kim
- Hydrogen Research Center, Research Institute of Industrial Science and Technology, Pohang, 37673, Republic of Korea
| | - Su Shiung Lam
- Pyrolysis Technology Research Group, Higher Institution Centre of Excellence (HICoE), Institute of Tropical Aquaculture and Fisheries (Akuatrop), Universiti Malaysia Terengganu, 21030, Kuala Nerus, Terengganu, Malaysia
| | - Sang-Chul Jung
- Department of Environmental Engineering, Sunchon National University, Suncheon, 57923, Republic of Korea
| | - JiHyeon Song
- Department of Civil and Environmental Engineering, Sejong University, Seoul, 05006, Republic of Korea
| | - Young-Kwon Park
- School of Environmental Engineering, University of Seoul, Seoul, 02504, Republic of Korea.
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Liu J, An F, Zhu C, Zhou D. Efficient transformation of DDT with peroxymonosulfate activation by different crystallographic MnO 2. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 759:142864. [PMID: 33268252 DOI: 10.1016/j.scitotenv.2020.142864] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2020] [Revised: 09/29/2020] [Accepted: 10/03/2020] [Indexed: 06/12/2023]
Abstract
In this study, three different structures of MnO2 were synthesized and used to activate peroxymonosulfate (PMS) for the degradation of DDT in aqueous solutions. It was found that DDT was efficiently degraded in the MnO2/PMS system and the degradation rate was dependent on the properties of MnO2 including crystal structure (followed the order: α-MnO2 > γ-MnO2 > β-MnO2), surface area and Mn(III) content. Sulfate radicals (SO4-) was primarily responsible for the degradation of DDT based on the results of electron paramagnetic resonance (EPR) and quenching experiments. The degradation of DDT was suppressed at alkaline pH because the formation of SO4- was inhibited. The results of GC-MS indicated that dichlorobenzophenone, 4-chlorobenzoic acid and benzylalcohol were the dominant intermediates for DDT degradation. The possible pathways of DDT degradation were proposed according to the identified products.
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Affiliation(s)
- Jingliang Liu
- School of Environmental Science, Nanjing XiaoZhuang University, Nanjing 211171, China
| | - Fengxia An
- State Power Environmental Protection Research Institute Co. Ltd., Nanjing 210031, China
| | - Changyin Zhu
- School of the Environment, Nanjing University, Nanjing 210093, China
| | - Dongmei Zhou
- School of the Environment, Nanjing University, Nanjing 210093, China.
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19
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Zhang L, Wang S, Lv L, Ding Y, Tian D, Wang S. Insights into the Reactive and Deactivation Mechanisms of Manganese Oxides for Ozone Elimination: The Roles of Surface Oxygen Species. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:1410-1419. [PMID: 33486953 DOI: 10.1021/acs.langmuir.0c02841] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Manganese oxides with varied Mn valance states but identical morphologies were synthesized via a facile thermal treatment of γ-MnOOH. Also, their catalytic performance on ozone decomposition was investigated following the order of Mn3O4 < Mn2O3 < MnO2 < MnO2-H-200. In combination with X-ray diffraction (XRD), scanning electron microscopy (SEM), Brunauer-Emmett-Teller (BET), transmission electron microscopy (TEM), H2-temperature-programmed reduction (TPR), O2-temperature-programmed desorption (TPD), and X-ray photoelectron spectroscopy (XPS) characterization, it was deduced that the superior O3 decomposition capacity for MnO2-H-200 was strongly associated with abundant oxygen vacancies on its surface. Among Mn3O4, Mn2O3, and MnO2, the difference in O3 decomposition efficiency was dependent on the divergent nature of oxygen vacancy. Density functional theory (DFT) calculation revealed that Mn3O4 and MnO2 possessed lower formation energy of oxygen vacancy, while MnO2 had the minimum desorption energy of peroxide species (O2*). It was deduced that the promotion of the O3 decomposition capability was attributed to the easier O2* desorption. Insights into the deactivation mechanism for MnO2-H-200 further validated the assumptions. As the reaction proceeded, adsorbed oxygen species accumulated on the catalyst surface, and a portion of them were transformed to lattice oxygen. The consumption of oxygen vacancy led to the deactivation of the catalyst.
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Affiliation(s)
- Lei Zhang
- Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, P. R. China
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Sheng Wang
- Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, P. R. China
| | - Lirong Lv
- Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, P. R. China
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Ya Ding
- Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, P. R. China
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Dongxu Tian
- School of Chemical Engineering, Dalian University of Technology, Dalian 116024, P. R. China
| | - Shudong Wang
- Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, P. R. China
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20
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Ozone elimination over oxygen-deficient MnOx based catalysts: Effect of different transition metal dopants. Chem Eng Sci 2021. [DOI: 10.1016/j.ces.2020.116011] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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21
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Jeon W, Choi IH, Park JY, Lee JS, Hwang KR. Alkaline wet oxidation of lignin over Cu-Mn mixed oxide catalysts for production of vanillin. Catal Today 2020. [DOI: 10.1016/j.cattod.2019.12.037] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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22
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Li X, Ma J, He H. Recent advances in catalytic decomposition of ozone. J Environ Sci (China) 2020; 94:14-31. [PMID: 32563478 DOI: 10.1016/j.jes.2020.03.058] [Citation(s) in RCA: 50] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2020] [Revised: 03/31/2020] [Accepted: 03/31/2020] [Indexed: 06/11/2023]
Abstract
Ozone (O3), as a harmful air pollutant, has been of wide concern. Safe, efficient, and economical O3 removal methods urgently need to be developed. Catalytic decomposition is the most promising method for O3 removal, especially at room temperature or even subzero temperatures. Great efforts have been made to develop high-efficiency catalysts for O3 decomposition that can operate at low temperatures, high space velocity and high humidity. First, this review describes the general reaction mechanism of O3 decomposition on noble metal and transition metal oxide catalysts. Then, progress on the O3 decomposition performance of various catalysts in the past 30 years is summarized in detail. The main focus is the O3 decomposition performance of manganese oxides, which are divided into supported manganese oxides and non-supported manganese oxides. Methods to improve the activity, stability, and humidity resistance of manganese oxide catalysts for O3 decomposition are also summarized. The deactivation mechanisms of manganese oxides under dry and humid conditions are discussed. The O3 decomposition performance of monolithic catalysts is also summarized from the perspective of industrial applications. Finally, the future development directions and prospects of O3 catalytic decomposition technology are put forward.
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Affiliation(s)
- Xiaotong Li
- State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jinzhu Ma
- State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China; University of Chinese Academy of Sciences, Beijing 100049, China.
| | - Hong He
- State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China; University of Chinese Academy of Sciences, Beijing 100049, China
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23
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Bo Z, Yang S, Kong J, Zhu J, Wang Y, Yang H, Li X, Yan J, Cen K, Tu X. Solar-Enhanced Plasma-Catalytic Oxidation of Toluene over a Bifunctional Graphene Fin Foam Decorated with Nanofin-like MnO 2. ACS Catal 2020; 10:4420-4432. [PMID: 32296596 PMCID: PMC7147263 DOI: 10.1021/acscatal.9b04844] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2019] [Revised: 02/27/2020] [Indexed: 12/20/2022]
Abstract
In this work, we propose a hybrid and unique process combining solar irradiation and post-plasma catalysis (PPC) for the effective oxidation of toluene over a highly active and stable MnO2/GFF (bifunctional graphene fin foam) catalyst. The bifunctional GFF, serving as both the catalyst support and light absorber, is decorated with MnO2 nanofins, forming a hierarchical fin-on-fin structure. The results show that the MnO2/GFF catalyst can effectively capture and convert renewable solar energy into heat (absorption of >95%), leading to a temperature rise (55.6 °C) of the catalyst bed under solar irradiation (1 sun, light intensity 1000 W m-2). The catalyst weight (9.8 mg) used in this work was significantly lower (10-100 times lower) than that used in previous studies (usually 100-1000 mg). Introducing solar energy into the typical PPC process via solar thermal conversion significantly enhances the conversion of toluene and CO2 selectivity by 36-63%, reaching ∼93% for toluene conversion and ∼83% for CO2 selectivity at a specific input energy of ∼350 J L-1, thus remarkably reducing the energy consumption of the plasma-catalytic gas cleaning process. The energy efficiency for toluene conversion in the solar-enhanced post-plasma catalytic (SEPPC) process reaches up to 12.7 g kWh-1, ∼57% higher than that using the PPC process without solar irradiation (8.1 g kWh-1), whereas the energy consumption of the SEPPC process is reduced by 35-52%. Moreover, the MnO2/GFF catalyst exhibits an excellent self-cleaning capability induced by solar irradiation, demonstrating a superior long-term catalytic stability of 72 h at 1 sun, significantly better than that reported in previous works. The prominent synergistic effect of solar irradiation and PPC with a synergistic capacity of ∼42% can be mainly attributed to the solar-induced thermal effect on the catalyst bed, boosting ozone decomposition (an almost triple enhancement from ∼0.18 gO3 g-1 h-1 for PPC to ∼0.52 gO3 g-1 h-1 for SEPPC) to generate more oxidative species (e.g., O radicals) and enhancing the catalytic oxidation on the catalyst surfaces, as well as the self-cleaning capacity of the catalyst at elevated temperatures driven by solar irradiation. This work opens a rational route to use abundant, renewable solar power to achieve high-performance and energy-efficient removal of volatile organic compounds.
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Affiliation(s)
- Zheng Bo
- State Key Laboratory of Clean Energy Utilization, Institute for Thermal Power Engineering, College of Energy Engineering, Zhejiang University, Hangzhou, Zhejiang Province 310027, China
| | - Shiling Yang
- State Key Laboratory of Clean Energy Utilization, Institute for Thermal Power Engineering, College of Energy Engineering, Zhejiang University, Hangzhou, Zhejiang Province 310027, China
| | - Jing Kong
- State Key Laboratory of Clean Energy Utilization, Institute for Thermal Power Engineering, College of Energy Engineering, Zhejiang University, Hangzhou, Zhejiang Province 310027, China
| | - Jinhui Zhu
- State Key Laboratory of Clean Energy Utilization, Institute for Thermal Power Engineering, College of Energy Engineering, Zhejiang University, Hangzhou, Zhejiang Province 310027, China
| | - Yaolin Wang
- Department of Electrical Engineering and Electronics, University of Liverpool, Liverpool L69 3GJ, U.K
| | - Huachao Yang
- State Key Laboratory of Clean Energy Utilization, Institute for Thermal Power Engineering, College of Energy Engineering, Zhejiang University, Hangzhou, Zhejiang Province 310027, China
| | - Xiaodong Li
- State Key Laboratory of Clean Energy Utilization, Institute for Thermal Power Engineering, College of Energy Engineering, Zhejiang University, Hangzhou, Zhejiang Province 310027, China
| | - Jianhua Yan
- State Key Laboratory of Clean Energy Utilization, Institute for Thermal Power Engineering, College of Energy Engineering, Zhejiang University, Hangzhou, Zhejiang Province 310027, China
| | - Kefa Cen
- State Key Laboratory of Clean Energy Utilization, Institute for Thermal Power Engineering, College of Energy Engineering, Zhejiang University, Hangzhou, Zhejiang Province 310027, China
| | - Xin Tu
- Department of Electrical Engineering and Electronics, University of Liverpool, Liverpool L69 3GJ, U.K
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24
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Chen X, Zhao Z, Liu S, Huang J, Xie J, Zhou Y, Pan Z, Lu H. Ce–Fe–Mn ternary mixed-oxide catalysts for catalytic decomposition of ozone at ambient temperatures. J RARE EARTH 2020. [DOI: 10.1016/j.jre.2019.01.010] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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25
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Yang L, Ma J, Li X, Zhang C, He H. Enhancing Oxygen Vacancies of Ce-OMS-2 via Optimized Hydrothermal Conditions to Improve Catalytic Ozone Decomposition. Ind Eng Chem Res 2019. [DOI: 10.1021/acs.iecr.9b05967] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Li Yang
- State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
- Engineering & Technology Research Center for Environmental Protection Materials and Equipment of Jiangxi Province, Pingxiang University, Pingxiang 337055, China
| | - Jinzhu Ma
- State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
- Center for Excellence in Regional Atmospheric Environment, Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xiaotong Li
- State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Changbin Zhang
- State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Hong He
- State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
- Center for Excellence in Regional Atmospheric Environment, Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
- University of Chinese Academy of Sciences, Beijing 100049, China
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26
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Hong W, Zhu T, Sun Y, Wang H, Li X, Shen F. Enhancing Oxygen Vacancies by Introducing Na + into OMS-2 Tunnels To Promote Catalytic Ozone Decomposition. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2019; 53:13332-13343. [PMID: 31642660 DOI: 10.1021/acs.est.9b03689] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
A series of Na-OMS-2 catalysts was prepared by a facile solid-state reaction method. Their physiochemical properties were characterized, and the catalytic activity for ozone decomposition was evaluated. The results showed that the introduction of Na+ in the tunnel framework of OMS-2 facilitated lattice defect formation, which significantly enhanced oxygen vacancies, which are believed to be the active sites for ozone decomposition. Density functional theory calculations also showed that both the oxygen vacancy formation energy and ozone adsorption energy over Na-OMS-2 decreased because of Na+ introduction. Sodium ion introduction significantly improved the OMS-2 catalytic activity for ozone decomposition. The Na-OMS-2 catalyst with a Na/Mn molar ratio of 1/4 exhibited ozone conversion at 92.5% at 25 ± 1 °C after reaction for 6 h under an initial ozone concentration of 45 ± 2 ppm, a relative humidity of 30 ± 2%, and a space velocity of 660 000 h-1. This showed that this catalyst was far superior to manganese oxide catalysts reported to date. Furthermore, the research results also showed that the catalytic activity of Na-OMS-2 deactivated by the accumulation of oxygen-related intermediates was recovered by calcination at 425 °C under N2 atmosphere for 0.5 h. Finally, a complete mechanism for ozone decomposition, catalyst deactivation, and regeneration was proposed.
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Affiliation(s)
- Wei Hong
- School of Space and Environment, Beijing Key Laboratory of Bio-Inspired Energy Materials and Devices , Beihang University , Beijing 100191 , China
| | - Tianle Zhu
- School of Space and Environment, Beijing Key Laboratory of Bio-Inspired Energy Materials and Devices , Beihang University , Beijing 100191 , China
| | - Ye Sun
- School of Space and Environment, Beijing Key Laboratory of Bio-Inspired Energy Materials and Devices , Beihang University , Beijing 100191 , China
| | - Haining Wang
- School of Space and Environment, Beijing Key Laboratory of Bio-Inspired Energy Materials and Devices , Beihang University , Beijing 100191 , China
| | - Xiang Li
- School of Space and Environment, Beijing Key Laboratory of Bio-Inspired Energy Materials and Devices , Beihang University , Beijing 100191 , China
| | - Fangxia Shen
- School of Space and Environment, Beijing Key Laboratory of Bio-Inspired Energy Materials and Devices , Beihang University , Beijing 100191 , China
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27
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Gounden AN, Jonnalagadda SB. Advances in Treatment of Brominated Hydrocarbons by Heterogeneous Catalytic Ozonation and Bromate Minimization. Molecules 2019; 24:molecules24193450. [PMID: 31547554 PMCID: PMC6803844 DOI: 10.3390/molecules24193450] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2019] [Revised: 09/13/2019] [Accepted: 09/19/2019] [Indexed: 11/16/2022] Open
Abstract
The formation of carcinogenic bromate ions is a constraint when ozone is used for the remediation of water containing brominated organic materials. With its strong oxidizing ability, ozone rapidly transforms bromide in aqueous media to bromate, through a series of reactions involving hydroxyl radicals. Several strategies, such as limiting the ozone concentration, maintaining pH < 6, or the use of ammonia or hydrogen peroxide were explored to minimize bromate generation. However, most of the above strategies had a negative effect on the ozonation efficiency. The advanced oxidation processes, using catalysts together with ozone, have proven to be a promising technology for the degradation of pollutants in wastewater, but very few studies have been conducted to find ways to minimize bromate formation during this approach. The proposed article, therefore, presents a comprehensive review on recent advances in bromate reduction in water by catalytic ozonation and proposes reaction mechanisms associated with the catalytic process. The main aim is to highlight any gaps in the reported studies, thus creating a platform for future research and a quest to find environment friendly and efficacious catalysts for minimizing bromate formation in aqueous media during ozonation of brominated organic compounds.
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Affiliation(s)
- Asogan N Gounden
- Department of Chemistry, Mangosuthu University of Technology, P.O. Box 12363, Jacobs 4026, South Africa.
| | - Sreekantha B Jonnalagadda
- School of Chemistry, Westville Campus, University of KwaZulu-Natal, P Bag X54001, Durban 4000, South Africa.
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28
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Effect of active metal loading on catalyst structure and performance in room temperature oxidation of acetone by ozone. J IND ENG CHEM 2019. [DOI: 10.1016/j.jiec.2019.04.026] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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29
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Ryu HW, Song MY, Park JS, Kim JM, Jung SC, Song J, Kim BJ, Park YK. Removal of toluene using ozone at room temperature over mesoporous Mn/Al 2O 3 catalysts. ENVIRONMENTAL RESEARCH 2019; 172:649-657. [PMID: 30878736 DOI: 10.1016/j.envres.2019.03.016] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2018] [Revised: 02/15/2019] [Accepted: 03/06/2019] [Indexed: 06/09/2023]
Abstract
The catalytic oxidation of toluene with ozone at room temperature was carried out over hierarchically ordered mesoporous catalysts (CeO2 (meso), Mn2O3 (meso), ZrO2 (meso), and γ-Al2O3 (meso)) and Al2O3 with various textural properties and phases (γ-Al2O3 (meso), γ-Al2O3 (13 nm), and α-Al2O3) to examine the effects of the nature of the catalyst on the catalytic activity. The catalysts were characterized by N2-physisorption measurements, powder X-ray diffraction, temperature programmed reduction, X-ray photoelectron spectroscopy and scanning transmission electron microscopy with energy dispersive spectroscopy. Among the ordered mesoporous catalysts, γ-Al2O3 (meso) had the highest toluene removal efficiency because of its highest surface area and pore volume, which in turn was selected for further investigation. Manganese (Mn) was introduced to various Al2O3 to improve the toluene removal efficiency. Comparing the Mn-loaded catalysts supported on various Al2O3 with different crystalline phases or pore structures, Mn/γ-Al2O3 (meso), had the highest catalytic activity as well as the highest CO2/CO ratio. The higher activity was attributed to the larger surface area, weaker interaction between Mn and Al2O3, and larger portion of Mn2O3 phase. The increase in ozone concentration led to an improvement in the carbon balance but this enhancement was insufficient due to the deposition of by-products on the catalyst. After long term tests at room temperature, the reaction intermediates and carbonaceous deposits of the used catalysts were identified.
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Affiliation(s)
- Hae Won Ryu
- School of Environmental Engineering, University of Seoul, Seoul 02504, Republic of Korea
| | - Min Young Song
- School of Environmental Engineering, University of Seoul, Seoul 02504, Republic of Korea
| | - Jin Seo Park
- Department of Chemistry, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Ji Man Kim
- Department of Chemistry, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Sang-Chul Jung
- Department of Environmental Engineering, Sunchon National University, Suncheon 57922, Republic of Korea
| | - JiHyeon Song
- Department of Civil and Environmental Engineering, Sejong University, Seoul 05006, Republic of Korea
| | - Byung-Joo Kim
- Research Laboratory for Multifunctional Carbon Materials, Korea Institute of Carbon Convergence Technology, Jeonju 54853, Republic of Korea
| | - Young-Kwon Park
- School of Environmental Engineering, University of Seoul, Seoul 02504, Republic of Korea.
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30
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He C, Cheng J, Zhang X, Douthwaite M, Pattisson S, Hao Z. Recent Advances in the Catalytic Oxidation of Volatile Organic Compounds: A Review Based on Pollutant Sorts and Sources. Chem Rev 2019; 119:4471-4568. [DOI: 10.1021/acs.chemrev.8b00408] [Citation(s) in RCA: 769] [Impact Index Per Article: 153.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Chi He
- National Engineering Laboratory for VOCs Pollution Control Material & Technology, University of Chinese Academy of Sciences, Beijing 101408, P.R. China
- Department of Environmental Science and Engineering, State Key Laboratory of Multiphase Flow in Power Engineering, School of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an 710049, Shaanxi, P.R. China
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, U.K
| | - Jie Cheng
- National Engineering Laboratory for VOCs Pollution Control Material & Technology, University of Chinese Academy of Sciences, Beijing 101408, P.R. China
| | - Xin Zhang
- National Engineering Laboratory for VOCs Pollution Control Material & Technology, University of Chinese Academy of Sciences, Beijing 101408, P.R. China
| | - Mark Douthwaite
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, U.K
| | - Samuel Pattisson
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, U.K
| | - Zhengping Hao
- National Engineering Laboratory for VOCs Pollution Control Material & Technology, University of Chinese Academy of Sciences, Beijing 101408, P.R. China
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31
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Tao L, Zhao G, Chen P, Zhang Z, Liu Y, Lu Y. High-Performance Co-MnOx
Composite Oxide Catalyst Structured onto Al-Fiber Felt for High-Throughput O3
Decomposition. ChemCatChem 2019. [DOI: 10.1002/cctc.201801401] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Longgang Tao
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes; School of Chemistry and Molecular Engineering; East China Normal University; Shanghai 200062 P.R. China
| | - Guofeng Zhao
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes; School of Chemistry and Molecular Engineering; East China Normal University; Shanghai 200062 P.R. China
| | - Pengjing Chen
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes; School of Chemistry and Molecular Engineering; East China Normal University; Shanghai 200062 P.R. China
| | - Zhiqiang Zhang
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes; School of Chemistry and Molecular Engineering; East China Normal University; Shanghai 200062 P.R. China
| | - Ye Liu
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes; School of Chemistry and Molecular Engineering; East China Normal University; Shanghai 200062 P.R. China
| | - Yong Lu
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes; School of Chemistry and Molecular Engineering; East China Normal University; Shanghai 200062 P.R. China
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32
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Ji J, Fang Y, He L, Huang H. Efficient catalytic removal of airborne ozone under ambient conditions over manganese oxides immobilized on carbon nanotubes. Catal Sci Technol 2019. [DOI: 10.1039/c9cy00762h] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
MnOx–CNT nanocomposites are efficient towards ozone decomposition owing to the electron transfer from the CNTs to MnOx that facilitates the activation of ozone.
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Affiliation(s)
- Jian Ji
- School of Environmental Science and Engineering
- Sun Yat-sen University
- Guangzhou 510006
- China
| | - Yang Fang
- School of Environmental Science and Engineering
- Sun Yat-sen University
- Guangzhou 510006
- China
| | - Linsong He
- School of Environmental Science and Engineering
- Sun Yat-sen University
- Guangzhou 510006
- China
| | - Haibao Huang
- School of Environmental Science and Engineering
- Sun Yat-sen University
- Guangzhou 510006
- China
- Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology
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33
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Chen L, Ondarts M, Outin J, Gonthier Y, Gonze E. Catalytic decomposition performance for O 3 and NO 2 in humid indoor air on a MnO x/Al 2O 3 catalyst modified by a cost-effective chemical grafting method. J Environ Sci (China) 2018; 74:58-70. [PMID: 30340675 DOI: 10.1016/j.jes.2018.02.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2017] [Revised: 02/09/2018] [Accepted: 02/12/2018] [Indexed: 06/08/2023]
Abstract
Processes based on non-thermal plasma (NTP) for indoor air treatment inevitably lead to the formation of toxic by-products such as ozone (O3) and nitrogen oxides (NOx). Adding a step of heterogeneous catalysis in series with NTP could allow for the decomposition of the by-products. Therefore, different catalysts were developed based on transition metal oxides, such as NiOx, CoOx and MnOx with different weight percentage 1, 5 and 10wt.%, deposited on a γ-Al2O3 support. The O3 removal efficiency (ORE) and the NOx removal efficiency (NRE) were very encouraging in dry air: about 65% and 80%, respectively, by using 2g 5wt.% MnOx/Al2O3 catalyst under the experimental conditions. However, strongly negative effects of relative humidity (RH) on the catalytic decomposition performance were observed. To overcome this limitation, the catalyst surface was modified to make it hydrophobic using a cost-effective chemical grafting method. This treatment consisted in impregnating the 5wt.% MnOx/Al2O3 catalyst with different trichloro(alkyl)silanes (TCAS). The effects of different linker lengths and amounts of TCAS for the hydrophobicity and the decomposition performance of surface-modified catalysts under humid conditions were investigated. Our results show that the surface-modified catalyst with the shortest linker and 0.25mmol/gcat of modifying agent represents the best catalytic decomposition performance for O3. Its ORE is 41% at 60% RH, which is twice that of the non-modified catalyst.
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Affiliation(s)
- Longwen Chen
- Université Grenoble Alpes, Université Savoie Mont Blanc, CNRS, Laboratoire d'Optimisation de la Conception et Ingénierie de l'Environnement (LOCIE), 73000 Chambéry, France.
| | - Michel Ondarts
- Université Grenoble Alpes, Université Savoie Mont Blanc, CNRS, Laboratoire d'Optimisation de la Conception et Ingénierie de l'Environnement (LOCIE), 73000 Chambéry, France
| | - Jonathan Outin
- Université Grenoble Alpes, Université Savoie Mont Blanc, CNRS, Laboratoire d'Optimisation de la Conception et Ingénierie de l'Environnement (LOCIE), 73000 Chambéry, France
| | - Yves Gonthier
- Université Grenoble Alpes, Université Savoie Mont Blanc, CNRS, Laboratoire d'Optimisation de la Conception et Ingénierie de l'Environnement (LOCIE), 73000 Chambéry, France
| | - Evelyne Gonze
- Université Grenoble Alpes, Université Savoie Mont Blanc, CNRS, Laboratoire d'Optimisation de la Conception et Ingénierie de l'Environnement (LOCIE), 73000 Chambéry, France
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34
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Wang H, Rassu P, Wang X, Li H, Wang X, Wang X, Feng X, Yin A, Li P, Jin X, Chen SL, Ma X, Wang B. An Iron-Containing Metal-Organic Framework as a Highly Efficient Catalyst for Ozone Decomposition. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201810268] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Hang Wang
- Beijing Key Laboratory of Photoelectronic/Electrophotonic, Conversion Materials; Key Laboratory of Cluster Science; Ministry of Education School of Chemistry and Chemical Engineering; Beijing Institute of Technology; Beijing 100081 P. R. China
| | - Pietro Rassu
- Beijing Key Laboratory of Photoelectronic/Electrophotonic, Conversion Materials; Key Laboratory of Cluster Science; Ministry of Education School of Chemistry and Chemical Engineering; Beijing Institute of Technology; Beijing 100081 P. R. China
| | - Xiao Wang
- Beijing Key Laboratory of Photoelectronic/Electrophotonic, Conversion Materials; Key Laboratory of Cluster Science; Ministry of Education School of Chemistry and Chemical Engineering; Beijing Institute of Technology; Beijing 100081 P. R. China
| | - Haiwei Li
- Beijing Key Laboratory of Photoelectronic/Electrophotonic, Conversion Materials; Key Laboratory of Cluster Science; Ministry of Education School of Chemistry and Chemical Engineering; Beijing Institute of Technology; Beijing 100081 P. R. China
| | - Xiaorui Wang
- Beijing Key Laboratory of Photoelectronic/Electrophotonic, Conversion Materials; Key Laboratory of Cluster Science; Ministry of Education School of Chemistry and Chemical Engineering; Beijing Institute of Technology; Beijing 100081 P. R. China
| | - Xiaoqi Wang
- Beijing Key Laboratory of Photoelectronic/Electrophotonic, Conversion Materials; Key Laboratory of Cluster Science; Ministry of Education School of Chemistry and Chemical Engineering; Beijing Institute of Technology; Beijing 100081 P. R. China
| | - Xiao Feng
- Beijing Key Laboratory of Photoelectronic/Electrophotonic, Conversion Materials; Key Laboratory of Cluster Science; Ministry of Education School of Chemistry and Chemical Engineering; Beijing Institute of Technology; Beijing 100081 P. R. China
| | - Anxiang Yin
- Beijing Key Laboratory of Photoelectronic/Electrophotonic, Conversion Materials; Key Laboratory of Cluster Science; Ministry of Education School of Chemistry and Chemical Engineering; Beijing Institute of Technology; Beijing 100081 P. R. China
| | - Pengfei Li
- Beijing Key Laboratory of Photoelectronic/Electrophotonic, Conversion Materials; Key Laboratory of Cluster Science; Ministry of Education School of Chemistry and Chemical Engineering; Beijing Institute of Technology; Beijing 100081 P. R. China
| | - Xu Jin
- Research Institute of Petroleum Exploration & Development; China National Petroleum Corporation; No. 20 Xueyuan Rd., Haidian District Beijing 100083 P. R. China
| | - Shi-Lu Chen
- Beijing Key Laboratory of Photoelectronic/Electrophotonic, Conversion Materials; Key Laboratory of Cluster Science; Ministry of Education School of Chemistry and Chemical Engineering; Beijing Institute of Technology; Beijing 100081 P. R. China
| | - Xiaojie Ma
- Beijing Key Laboratory of Photoelectronic/Electrophotonic, Conversion Materials; Key Laboratory of Cluster Science; Ministry of Education School of Chemistry and Chemical Engineering; Beijing Institute of Technology; Beijing 100081 P. R. China
| | - Bo Wang
- Beijing Key Laboratory of Photoelectronic/Electrophotonic, Conversion Materials; Key Laboratory of Cluster Science; Ministry of Education School of Chemistry and Chemical Engineering; Beijing Institute of Technology; Beijing 100081 P. R. China
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35
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Wang H, Rassu P, Wang X, Li H, Wang X, Wang X, Feng X, Yin A, Li P, Jin X, Chen SL, Ma X, Wang B. An Iron-Containing Metal-Organic Framework as a Highly Efficient Catalyst for Ozone Decomposition. Angew Chem Int Ed Engl 2018; 57:16416-16420. [DOI: 10.1002/anie.201810268] [Citation(s) in RCA: 66] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2018] [Revised: 10/05/2018] [Indexed: 11/09/2022]
Affiliation(s)
- Hang Wang
- Beijing Key Laboratory of Photoelectronic/Electrophotonic, Conversion Materials; Key Laboratory of Cluster Science; Ministry of Education School of Chemistry and Chemical Engineering; Beijing Institute of Technology; Beijing 100081 P. R. China
| | - Pietro Rassu
- Beijing Key Laboratory of Photoelectronic/Electrophotonic, Conversion Materials; Key Laboratory of Cluster Science; Ministry of Education School of Chemistry and Chemical Engineering; Beijing Institute of Technology; Beijing 100081 P. R. China
| | - Xiao Wang
- Beijing Key Laboratory of Photoelectronic/Electrophotonic, Conversion Materials; Key Laboratory of Cluster Science; Ministry of Education School of Chemistry and Chemical Engineering; Beijing Institute of Technology; Beijing 100081 P. R. China
| | - Haiwei Li
- Beijing Key Laboratory of Photoelectronic/Electrophotonic, Conversion Materials; Key Laboratory of Cluster Science; Ministry of Education School of Chemistry and Chemical Engineering; Beijing Institute of Technology; Beijing 100081 P. R. China
| | - Xiaorui Wang
- Beijing Key Laboratory of Photoelectronic/Electrophotonic, Conversion Materials; Key Laboratory of Cluster Science; Ministry of Education School of Chemistry and Chemical Engineering; Beijing Institute of Technology; Beijing 100081 P. R. China
| | - Xiaoqi Wang
- Beijing Key Laboratory of Photoelectronic/Electrophotonic, Conversion Materials; Key Laboratory of Cluster Science; Ministry of Education School of Chemistry and Chemical Engineering; Beijing Institute of Technology; Beijing 100081 P. R. China
| | - Xiao Feng
- Beijing Key Laboratory of Photoelectronic/Electrophotonic, Conversion Materials; Key Laboratory of Cluster Science; Ministry of Education School of Chemistry and Chemical Engineering; Beijing Institute of Technology; Beijing 100081 P. R. China
| | - Anxiang Yin
- Beijing Key Laboratory of Photoelectronic/Electrophotonic, Conversion Materials; Key Laboratory of Cluster Science; Ministry of Education School of Chemistry and Chemical Engineering; Beijing Institute of Technology; Beijing 100081 P. R. China
| | - Pengfei Li
- Beijing Key Laboratory of Photoelectronic/Electrophotonic, Conversion Materials; Key Laboratory of Cluster Science; Ministry of Education School of Chemistry and Chemical Engineering; Beijing Institute of Technology; Beijing 100081 P. R. China
| | - Xu Jin
- Research Institute of Petroleum Exploration & Development; China National Petroleum Corporation; No. 20 Xueyuan Rd., Haidian District Beijing 100083 P. R. China
| | - Shi-Lu Chen
- Beijing Key Laboratory of Photoelectronic/Electrophotonic, Conversion Materials; Key Laboratory of Cluster Science; Ministry of Education School of Chemistry and Chemical Engineering; Beijing Institute of Technology; Beijing 100081 P. R. China
| | - Xiaojie Ma
- Beijing Key Laboratory of Photoelectronic/Electrophotonic, Conversion Materials; Key Laboratory of Cluster Science; Ministry of Education School of Chemistry and Chemical Engineering; Beijing Institute of Technology; Beijing 100081 P. R. China
| | - Bo Wang
- Beijing Key Laboratory of Photoelectronic/Electrophotonic, Conversion Materials; Key Laboratory of Cluster Science; Ministry of Education School of Chemistry and Chemical Engineering; Beijing Institute of Technology; Beijing 100081 P. R. China
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36
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Yang S, Bo Z, Yang H, Shuai X, Qi H, Li X, Yan J, Cen K. Hierarchical Petal-on-Petal MnO2/Vertical Graphene Foam for Postplasma Catalytic Decomposition of Toluene with High Efficiency and Ultralow Pressure Drop. Ind Eng Chem Res 2018. [DOI: 10.1021/acs.iecr.8b03387] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Shiling Yang
- State Key Laboratory of Clean Energy Utilization, Institute for Thermal Power Engineering, College of Energy Engineering, Zhejiang University, Hangzhou, Zhejiang Province 310027, China
| | - Zheng Bo
- State Key Laboratory of Clean Energy Utilization, Institute for Thermal Power Engineering, College of Energy Engineering, Zhejiang University, Hangzhou, Zhejiang Province 310027, China
| | - Huachao Yang
- State Key Laboratory of Clean Energy Utilization, Institute for Thermal Power Engineering, College of Energy Engineering, Zhejiang University, Hangzhou, Zhejiang Province 310027, China
| | - Xiaorui Shuai
- State Key Laboratory of Clean Energy Utilization, Institute for Thermal Power Engineering, College of Energy Engineering, Zhejiang University, Hangzhou, Zhejiang Province 310027, China
| | - Hualei Qi
- State Key Laboratory of Clean Energy Utilization, Institute for Thermal Power Engineering, College of Energy Engineering, Zhejiang University, Hangzhou, Zhejiang Province 310027, China
| | - Xiaodong Li
- State Key Laboratory of Clean Energy Utilization, Institute for Thermal Power Engineering, College of Energy Engineering, Zhejiang University, Hangzhou, Zhejiang Province 310027, China
| | - Jianhua Yan
- State Key Laboratory of Clean Energy Utilization, Institute for Thermal Power Engineering, College of Energy Engineering, Zhejiang University, Hangzhou, Zhejiang Province 310027, China
| | - Kefa Cen
- State Key Laboratory of Clean Energy Utilization, Institute for Thermal Power Engineering, College of Energy Engineering, Zhejiang University, Hangzhou, Zhejiang Province 310027, China
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37
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Yao X, Zhang J, Liang X, Long C. Plasma-catalytic removal of toluene over the supported manganese oxides in DBD reactor: Effect of the structure of zeolites support. CHEMOSPHERE 2018; 208:922-930. [PMID: 30068036 DOI: 10.1016/j.chemosphere.2018.06.064] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2018] [Revised: 05/11/2018] [Accepted: 06/08/2018] [Indexed: 06/08/2023]
Abstract
The degradation of toluene in dielectric barrier discharge (DBD) reactor packed with zeolites or MnOx/zeolites was investigated. The supported catalysts were prepared by loading 3 wt% of manganese on different zeolites (MCM-41, ZSM-5 and 13X) and were characterized in detail using N2 adsorption, XRD, TEM, H2-TPR and XPS analysis technology. Compared to the non-thermal plasma (NTP) alone system, the toluene degradation was improved significantly in NTP-MnOx/zeolites system. The highest toluene conversion of 99.4%, the CO2 selectivity of 73%, the carbon balance of 99.5% can be achieved in DBD reactor packed with MnOx/MCM-41. Both XRD and TEM results confirm that the manganese oxides were dispersed more uniformly on MnOx/MCM-41 than on MnOx/ZSM-5 or MnOx/13X. H2-TPR and XPS results suggest that manganese oxides on MnOx/MCM-41 are MnO2 and Mn2O3, while those on MnOx/ZSM-5 or MnOx/13X are MnO2 and MnO. These results indicate that the structures of zeolites play a significant role in the dispersion and oxidation state of manganese oxides, then affecting the activity of catalyst for toluene removal in plasma-catalysis system.
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Affiliation(s)
- Xiaohong Yao
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, 163 Xianlin Avenue, Nanjing 210023, China
| | - Jian Zhang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, 163 Xianlin Avenue, Nanjing 210023, China
| | - Xiaoshan Liang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, 163 Xianlin Avenue, Nanjing 210023, China
| | - Chao Long
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, 163 Xianlin Avenue, Nanjing 210023, China.
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38
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Low Temperature Catalytic Oxidation of Binary Mixture of Toluene and Acetone in the Presence of Ozone. Catal Letters 2018. [DOI: 10.1007/s10562-018-2536-8] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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39
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Xu X, Zhao J, Jiang Y, Tang X, Zhou Z, Zhu Y. Promotion of catalytic ozonation of aniline with Mn-Ce-O x/γ-Al 2O 3. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2018; 78:339-346. [PMID: 30101769 DOI: 10.2166/wst.2018.301] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
In this study, Mn-Ce-Ox/γ-Al2O3 supported catalysts were adopted to promote the removal efficiency of aniline in simulated wastewater with ozone. Mn-Ce-Ox/γ-Al2O3 catalysts were prepared by the impregnation-calcination method. Its phase structure, specific surface area, loading amount and distribution of active units were analyzed by XRD, BET, ICP-AES and TEM/SEM respectively. The characterization results demonstrated that the catalysts had a good dispersion of Mn-Ce-Ox active sites and an abundant porous structure from the γ-Al2O3 support. The catalytic ozonation results showed that with Mn3-Ce1-Ox/γ-Al2O3(1.0), the aniline removal efficiency was highly improved, 15.0% higher than that of ozonation without a catalyst. Furthermore, from the variation in loading amounts of Mn and Ce, it can be seen that the molar ratio of Mn and Ce within the Mn-Ce-Ox plays a key role in accelerating the ozonation of aniline in simulated wastewater with ozone, while Mn:Ce = 1.9:1 showed the best performance. More importantly, the catalysts showed high recycling performance and could be reused at least 12 times without obvious loss of activity.
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Affiliation(s)
- Xuelu Xu
- Institute of Environmental Remediation, Dalian Maritime University, 116026 Dalian, China E-mail:
| | - Jiao Zhao
- Institute of Environmental Remediation, Dalian Maritime University, 116026 Dalian, China E-mail:
| | - Yunfei Jiang
- Institute of Environmental Remediation, Dalian Maritime University, 116026 Dalian, China E-mail:
| | - Xiaojia Tang
- Institute of Environmental Remediation, Dalian Maritime University, 116026 Dalian, China E-mail:
| | - Zihao Zhou
- Institute of Environmental Remediation, Dalian Maritime University, 116026 Dalian, China E-mail:
| | - Yimin Zhu
- Institute of Environmental Remediation, Dalian Maritime University, 116026 Dalian, China E-mail:
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40
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Grosso-Giordano NA, Schroeder C, Okrut A, Solovyov A, Schöttle C, Chassé W, Marinković N, Koller H, Zones SI, Katz A. Outer-Sphere Control of Catalysis on Surfaces: A Comparative Study of Ti(IV) Single-Sites Grafted on Amorphous versus Crystalline Silicates for Alkene Epoxidation. J Am Chem Soc 2018; 140:4956-4960. [PMID: 29565124 DOI: 10.1021/jacs.7b11467] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
The effect of outer-sphere environment on alkene epoxidation catalysis using an organic hydroperoxide oxidant is demonstrated for calix[4]arene-TiIV single-sites grafted on amorphous vs crystalline delaminated zeotype (UCB-4) silicates as supports. A chelating calix[4]arene macrocyclic ligand helps enforce a constant TiIV inner-sphere, as characterized by UV-visible and X-ray absorption spectroscopies, thus enabling the rigorous comparison of outer-sphere environments across different siliceous supports. These outer-sphere environments are characterized by solid-state 1H NMR spectroscopy to comprise proximally organized silanols confined within 12 membered-ring cups in crystalline UCB-4, and are responsible for up to 5-fold enhancements in rates of epoxidation by TiIV centers.
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Affiliation(s)
- Nicolás A Grosso-Giordano
- Department of Chemical and Biomolecular Engineering , University of California, Berkeley , Berkeley , California 94720 , United States
| | - Christian Schroeder
- Institut für Physikalische Chemie , Westfälische Wilhelms-Universität Münster , Münster 48149 , Germany
| | - Alexander Okrut
- Department of Chemical and Biomolecular Engineering , University of California, Berkeley , Berkeley , California 94720 , United States
| | - Andrew Solovyov
- Department of Chemical and Biomolecular Engineering , University of California, Berkeley , Berkeley , California 94720 , United States
| | - Christian Schöttle
- Department of Chemical and Biomolecular Engineering , University of California, Berkeley , Berkeley , California 94720 , United States
| | - Walter Chassé
- Institut für Physikalische Chemie , Westfälische Wilhelms-Universität Münster , Münster 48149 , Germany
| | - Nebojša Marinković
- Department of Chemical Engineering , Columbia University , New York , New York 10027 , United States
| | - Hubert Koller
- Institut für Physikalische Chemie , Westfälische Wilhelms-Universität Münster , Münster 48149 , Germany
| | - Stacey I Zones
- Chevron Energy Technology Company , Richmond , California 94804 , United States
| | - Alexander Katz
- Department of Chemical and Biomolecular Engineering , University of California, Berkeley , Berkeley , California 94720 , United States
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41
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Yao X, Li Y, Fan Z, Zhang Z, Chen M, Shangguan W. Plasma Catalytic Removal of Hexanal over Co–Mn Solid Solution: Effect of Preparation Method and Synergistic Reaction of Ozone. Ind Eng Chem Res 2018. [DOI: 10.1021/acs.iecr.8b00191] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Xin Yao
- Research Center for Combustion and Environment Technology, Shanghai Jiao Tong University, 800 Dong Chuan Road, Shanghai 200240, PR China
| | - Yizhuo Li
- Shenyang Academy of Environmental Sciences, 98 Quanyun No. 3 Road, Shenyang 110167, PR China
| | - Zeyun Fan
- Research Center for Combustion and Environment Technology, Shanghai Jiao Tong University, 800 Dong Chuan Road, Shanghai 200240, PR China
| | - Zhixiang Zhang
- Research Center for Combustion and Environment Technology, Shanghai Jiao Tong University, 800 Dong Chuan Road, Shanghai 200240, PR China
| | - Mingxia Chen
- Research Center for Combustion and Environment Technology, Shanghai Jiao Tong University, 800 Dong Chuan Road, Shanghai 200240, PR China
| | - Wenfeng Shangguan
- Research Center for Combustion and Environment Technology, Shanghai Jiao Tong University, 800 Dong Chuan Road, Shanghai 200240, PR China
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42
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Wang H, Huang Z, Jiang Z, Jiang Z, Zhang Y, Zhang Z, Shangguan W. Trifunctional C@MnO Catalyst for Enhanced Stable Simultaneously Catalytic Removal of Formaldehyde and Ozone. ACS Catal 2018. [DOI: 10.1021/acscatal.8b00309] [Citation(s) in RCA: 58] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hongchao Wang
- Research Center for Combustion and Environmental Technology, Shanghai Jiao Tong University, Shanghai 200240, PR China
| | - Zhengwen Huang
- Research Center for Combustion and Environmental Technology, Shanghai Jiao Tong University, Shanghai 200240, PR China
| | - Zhi Jiang
- Research Center for Combustion and Environmental Technology, Shanghai Jiao Tong University, Shanghai 200240, PR China
| | - Zheng Jiang
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201204, China
| | - Yi Zhang
- Research Center for Combustion and Environmental Technology, Shanghai Jiao Tong University, Shanghai 200240, PR China
| | - Zhixiang Zhang
- Research Center for Combustion and Environmental Technology, Shanghai Jiao Tong University, Shanghai 200240, PR China
| | - Wenfeng Shangguan
- Research Center for Combustion and Environmental Technology, Shanghai Jiao Tong University, Shanghai 200240, PR China
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43
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The Design of MnOx Based Catalyst in Post-Plasma Catalysis Configuration for Toluene Abatement. Catalysts 2018. [DOI: 10.3390/catal8020091] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
This review provides an overview of our present state of knowledge using manganese oxide (MnOx)-based catalysts for toluene abatement in PPC (Post plasma-catalysis) configuration. The context of this study is concisely sum-up. After briefly screening the main depollution methods, the principles of PPC are exposed based on the coupling of two mature technologies such as NTP (Non thermal plasma) and catalysis. In that respect, the presentation of the abundant manganese oxides will be firstly given. Then in a second step the main features of MnOx allowing better performances in the reactions expected to occur in the abatement of toluene in PPC process are reviewed including ozone decomposition, toluene ozonation, CO oxidation and toluene total oxidation. Finally, in a last part the current status of the applications of PPC using MnOx on toluene abatement are discussed. In a first step, the selected variables of the hybrid process related to the experimental conditions of toluene abatement in air are identified. The selected variables are those expected to play a role in the performances of PPC system towards toluene abatement. Then the descriptors linked to the performances of the hybrid process in terms of efficiency are given and the effects of the variables on the experimental outcomes (descriptors) are discussed. The review would serve as a reference guide for the optimization of the PPC process using MnOx-based oxides for toluene abatement.
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44
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Feng M, Wang Z, Dionysiou DD, Sharma VK. Metal-mediated oxidation of fluoroquinolone antibiotics in water: A review on kinetics, transformation products, and toxicity assessment. JOURNAL OF HAZARDOUS MATERIALS 2018; 344:1136-1154. [PMID: 28919428 DOI: 10.1016/j.jhazmat.2017.08.067] [Citation(s) in RCA: 83] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2017] [Revised: 08/16/2017] [Accepted: 08/23/2017] [Indexed: 05/29/2023]
Abstract
Fluoroquinolones (FQs) are among the most potent antimicrobial agents, which have seen their increasing use as human and veterinary medicines to control bacterial infections. FQs have been extensively found in surface water and municipal wastewaters, which has raised great concerns due to their negative impacts to humans and ecological health. It is of utmost importance that FQs are treated before their release into the environment. This paper reviews oxidative removal of FQs using reactive oxygen (O3 and OH), sulfate radicals (SO4-), and high-valent transition metal (MnVII and FeVI) species. The role of metals in enhancing the performance of reactive oxygen and sulfur species is presented. The catalysts can significantly enhance the production of OH and/or SO4- radicals. At neutral pH, the second-order rate constants (k, M-1s-1) of the reactions between FQs and oxidants follow the order as k(OH)>k(O3)>k(FeVI)>k(MnVII). Moieties involved to transform target FQs to oxidized products and participation of the catalysts in the reaction pathways are discussed. Generally, the piperazinyl ring of FQs was found as the preferential attack site by each oxidant. Meanwhile, evaluation of aquatic ecotoxicity of the transformation products of FQs by these treatments is summarized.
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Affiliation(s)
- Mingbao Feng
- Department of Environmental and Occupational Health, School of Public Health, Texas A&M University, College Station, TX 77843, USA
| | - Zunyao Wang
- State Key Laboratory of Pollution Control and Resources Reuse, School of the Environment, Nanjing University, Jiangsu Nanjing 210023, PR China
| | - Dionysios D Dionysiou
- Environmental Engineering and Science Program, Department of Chemical and Environmental Engineering (DCEE), University of Cincinnati, Cincinnati, OH 45221, USA
| | - Virender K Sharma
- Department of Environmental and Occupational Health, School of Public Health, Texas A&M University, College Station, TX 77843, USA.
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45
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Zhu B, Li XS, Sun P, Liu JL, Ma XY, Zhu X, Zhu AM. A novel process of ozone catalytic oxidation for low concentration formaldehyde removal. CHINESE JOURNAL OF CATALYSIS 2017. [DOI: 10.1016/s1872-2067(17)62890-0] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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46
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Addition of manganese to alumina and its influence on the formation of supported NiMo catalysts for dibenzothiophene hydrodesulfurization application. J Catal 2016. [DOI: 10.1016/j.jcat.2016.08.015] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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47
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Zhao R, Jin D, Yang H, Lu S, Potter PM, Du C, Peng Y, Li X, Yan J. Low-Temperature Catalytic Decomposition of 130 Tetra- to Octa-PCDD/Fs Congeners over CuO X and MnO X Modified V 2O 5/TiO 2-CNTs with the Assistance of O 3. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2016; 50:11424-11432. [PMID: 27668311 DOI: 10.1021/acs.est.6b02977] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
In this study, a reliable and steady PCDD/F generation system was utilized to investigate the performance of catalysts, in which 130 congeners of tetra- to octapolychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) vapors were studied under simulated flue gas with/without O3. TiO2 and carbon nanotubes (CNTs) supported vanadium oxides (VOX/TiO2-CNTs) modified with MnOX and CuOX, which were reported to be beneficial to the decomposition of model molecules, were found to have a negative effect on the removal of real PCDD/Fs in the simulated flue gas without O3. Moreover, the addition of MnOX presented different effects depending on whether CuOX existed in catalysts or not, which was also contrary to its effects on the degradation of model molecules. In an O3-containing atmosphere, low chlorination level PCDD/Fs congeners were removed well over VOX-MnOX/TiO2-CNTs, while high chlorination level PCDD/Fs congeners were removed well over VOX-CuOX/TiO2-CNTs. Fortunately, all PCDD/Fs congeners decomposed well over VOX-MnOX-CuOX/TiO2-CNTs. Finally, the effects of tetra- to octachlorination level for the adsorption and degradation behaviors of PCDD/Fs congeners were also investigated.
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Affiliation(s)
| | | | | | | | - Phillip M Potter
- Department of Chemistry, Louisiana State University , Baton Rouge, Louisiana 70803, United States of America
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48
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Fleischer V, Steuer R, Parishan S, Schomäcker R. Investigation of the surface reaction network of the oxidative coupling of methane over Na2WO4/Mn/SiO2 catalyst by temperature programmed and dynamic experiments. J Catal 2016. [DOI: 10.1016/j.jcat.2016.06.014] [Citation(s) in RCA: 79] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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49
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Nguyen Dinh MT, Giraudon JM, Vandenbroucke AM, Morent R, De Geyter N, Lamonier JF. Manganese oxide octahedral molecular sieve K-OMS-2 as catalyst in post plasma-catalysis for trichloroethylene degradation in humid air. JOURNAL OF HAZARDOUS MATERIALS 2016; 314:88-94. [PMID: 27107238 DOI: 10.1016/j.jhazmat.2016.04.027] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2016] [Revised: 04/11/2016] [Accepted: 04/12/2016] [Indexed: 06/05/2023]
Abstract
The total oxidation of trichloroethylene (TCE) in air at low relative humidity (RH=10%) in the presence of CO2 (520ppmv) was investigated in function of energy density using an atmospheric pressure negative DC luminescent glow discharge combined with a cryptomelane catalyst positioned downstream of the plasma reactor at a temperature of 150°C. When using Non-Thermal Plasma (NTP) alone, it is found a low COx (x=1-2) yield in agreement with the detection of gaseous polychlorinated by-products in the outlet stream as well as ozone which is an harmful pollutant. Introduction of cryptomelane enhanced trichloroethylene removal, totally inhibited plasma ozone formation and increased significantly the COx yield. The improved performances of the hybrid system were mainly ascribed to the total destruction of plasma generated ozone on cryptomelane surface to produce active oxygen species. Consequently these active oxygen species greatly enhanced the abatement of the plasma non-reacted TCE and completely destroyed the hazardous plasma generated polychlorinated intermediates. The facile redox of Mn species associated with oxygen vacancies and mobility as well as the textural properties of the catalyst might also contribute as a whole to the efficiency of the process.
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Affiliation(s)
- M T Nguyen Dinh
- Université Lille, Sciences et Technologies, Unité de Catalyse et Chimie du Solide UMR CNRS UCCS 8181, 59655 Villeneuve d'Ascq, France; The University of Da-Nang, University of Science and Technology, 54, Nguyen Luong Bang, Da-Nang, Viet Nam
| | - J-M Giraudon
- Université Lille, Sciences et Technologies, Unité de Catalyse et Chimie du Solide UMR CNRS UCCS 8181, 59655 Villeneuve d'Ascq, France.
| | - A M Vandenbroucke
- Ghent University, Faculty of Engineering and Architecture, Department of Applied Physics, Research Unit Plasma Technology, Sint-Pietersnieuwstraat 41, 9000 Ghent, Belgium
| | - R Morent
- Ghent University, Faculty of Engineering and Architecture, Department of Applied Physics, Research Unit Plasma Technology, Sint-Pietersnieuwstraat 41, 9000 Ghent, Belgium
| | - N De Geyter
- Ghent University, Faculty of Engineering and Architecture, Department of Applied Physics, Research Unit Plasma Technology, Sint-Pietersnieuwstraat 41, 9000 Ghent, Belgium
| | - J-F Lamonier
- Université Lille, Sciences et Technologies, Unité de Catalyse et Chimie du Solide UMR CNRS UCCS 8181, 59655 Villeneuve d'Ascq, France
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50
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Nawaz F, Xie Y, Xiao J, Cao H, Ghazi ZA, Guo Z, Chen Y. The influence of the substituent on the phenol oxidation rate and reactive species in cubic MnO2catalytic ozonation. Catal Sci Technol 2016. [DOI: 10.1039/c6cy01542e] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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