1
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Zhang M, Wang Z, Li T, Zhang S, Zhong Q. Synthesis Ag-Hollandite by mild route for highly efficient ozone decomposition. JOURNAL OF HAZARDOUS MATERIALS 2024; 477:135388. [PMID: 39094308 DOI: 10.1016/j.jhazmat.2024.135388] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2024] [Revised: 07/11/2024] [Accepted: 07/30/2024] [Indexed: 08/04/2024]
Abstract
Catalytic ozone (O3) decomposition is a promising technology for curbing indoor O3 pollution, whereas its application is limited by the stability and moisture resistance of heterogeneous catalysts. Ag-Hollandite is a capable solution, but its facile synthesis still lacks systematic investigation. In this study, Ag-Hollandite catalysts were prepared using AgMnO4 as the precursor by reflux (AMO-Re), hydrothermal (AMO-HT), and homogeneous (AMO-HR) methods, respectively. The as-prepared samples showed excellent stability under moisture conditions, with the optimal one maintaining an O3 conversion rate of 99.19 % after 100 h. In the characterization results, Ramsdellite (R-MnO2) was identified as an intermediate species in the synthesis. AMO-HR exhibits higher activity due to enhanced active site exposure and weakened adsorption towards *OO species, while reduced surface hydroxyl content was a crucial factor for moisture resistance. This study aims to contribute insights for preparing catalysts by a facile method.
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Affiliation(s)
- Mingjia Zhang
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, PR China
| | - Zhongyu Wang
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, PR China
| | - Ting Li
- 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.
| | - Qin Zhong
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, PR China
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2
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Wang D, Jiang L, Tian M, Liu J, Zhan Y, Li X, Wang Z, He C. Efficacious destruction of typical aromatic hydrocarbons over CoMn/Ni foam monolithic catalysts with boosted activity and water resistance. J Colloid Interface Sci 2024; 668:98-109. [PMID: 38670000 DOI: 10.1016/j.jcis.2024.04.165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2024] [Revised: 04/22/2024] [Accepted: 04/23/2024] [Indexed: 04/28/2024]
Abstract
Developing cost-effective monolith catalyst with superior low-temperature activity is critical for oxidative efficacious removal of industrial volatile organic compounds (VOCs). However, the complexity of the industrial flue gas conditions demands the need for high moisture tolerance, which is challenging. Herein, CoMn-Metal Organic Framework (CoMn-MOF) was in situ grown on Ni foam (NiF) at room temperature to synthesize the cost-effective monolith catalyst. The optimized catalyst, Co1Mn1/NiF, exhibited excellent performance in toluene oxidation (T90 = 239 °C) due to the substitution of manganese into the cobalt lattice. This substitution weakened the Co-O bond strength, creating more oxygen vacancies and increasing the active oxygen species content. Additionally, experimentally and computationally evidence revealed that the mutual inhibiting effect of three typical aromatic hydrocarbons (benzene, toluene and m-xylene) over the Co1Mn1/NiF catalyst was attributed to the competitive adsorption occurring on the active site. Furthermore, the Co1Mn1/NiF catalyst also presents outstanding water resistance, particularly at a concentration of 3 vol%, where the activity is even enhanced. This was attributed to the lower water adsorption and dissociation energy derived from the interaction between the bimetals. Results demonstrate that the dissociation of water vapor enables more reactive oxygen species to participate in the reaction which reduces the formation of intermediates and facilitates the reaction. This investigation provides new insights into the preparation of oxygen vacancy-rich monolith catalysts with high water resistance for practical applications.
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Affiliation(s)
- Dengtai Wang
- School of Resources and Environmental Sciences, Wuhan University, 299 Bayi Road, Wuhan 430072, PR China
| | - Luxiang Jiang
- School of Resources and Environmental Sciences, Wuhan University, 299 Bayi Road, Wuhan 430072, PR China
| | - Mingjiao Tian
- Department of Environmental Science and Engineering, Xi'an Jiaotong University, Xi'an 710049, Shaanxi, PR China
| | - Jing Liu
- Huazhong Univ Sci & Technol, Sch Energy & Power Engn, State Key Lab Coal Combust, Wuhan 430074, PR China
| | - Yi Zhan
- School of Resources and Environmental Sciences, Wuhan University, 299 Bayi Road, Wuhan 430072, PR China
| | - Xiaoxiao Li
- School of Resources and Environmental Sciences, Wuhan University, 299 Bayi Road, Wuhan 430072, PR China
| | - Zuwu Wang
- School of Resources and Environmental Sciences, Wuhan University, 299 Bayi Road, Wuhan 430072, PR China.
| | - Chi He
- State Key Laboratory of Multiphase Flow in Power Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710049, Shaanxi, PR China
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3
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Chen H, Chen Q, Hu X, Ding C, Huang L, Wang N. Mullite-like SmMn 2O 5-Derived Composite Oxide-Supported Ni-Based Catalysts for Hydrogen Production by Auto-Thermal Reforming of Acetic Acid. MATERIALS (BASEL, SWITZERLAND) 2024; 17:2490. [PMID: 38893754 PMCID: PMC11173235 DOI: 10.3390/ma17112490] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2024] [Revised: 05/17/2024] [Accepted: 05/18/2024] [Indexed: 06/21/2024]
Abstract
The x%Ni/Sm2O3-MnO (x = 0, 10, 15, 20) catalysts derived from SmMn2O5 mullite were prepared by solution combustion and impregnation method; auto-thermal reforming (ATR) of acetic acid (HAc) for hydrogen production was used to explore the metal-support effect induced by Ni loadings on the catalytic reforming activity and product distribution. The 15%Ni/Sm2O3-MnO catalyst exhibited optimal catalytic performance, which can be due to the appropriate Ni loading inducing a strong metal-support interaction to form a stable Ni/Sm2O3-MnO active center, while side reactions, such as methanation and ketonization, were well suppressed. According to characterizations, Sm2O3-MnO mixed oxides derived from SmMn2O5 mullite were formed with oxygen vacancies; nevertheless, loading of Ni metal further promoted the formation of oxygen vacancies, thus enhancing adsorption and activation of oxygen-containing intermediate species and resulting in higher reactivity with HAc conversion near 100% and hydrogen yield at 2.62 mol-H2/mol-HAc.
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Affiliation(s)
- Hui Chen
- State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059, China
- College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu 610059, China
| | - Qi Chen
- State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059, China
- College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu 610059, China
| | - Xiaomin Hu
- College of Environmental Science and Engineering, Beijing University of Technology, Beijing 100124, China
| | - Chenyu Ding
- College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu 610059, China
| | - Lihong Huang
- State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059, China
- College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu 610059, China
| | - Ning Wang
- College of Environmental Science and Engineering, Beijing University of Technology, Beijing 100124, China
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4
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Liu L, Wu N, Ouyang M, Xing Y, Tian J, Chen P, Wu J, Hu Y, Niu X, Fu M, Ye D. Enhancement Effect Induced by the Second Metal to Promote Ozone Catalytic Oxidation of VOCs. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2024; 58:6725-6735. [PMID: 38565876 DOI: 10.1021/acs.est.4c00710] [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: 04/04/2024]
Abstract
It is a promising research direction to develop catalysts with high stability and ozone utilization for low-temperature ozone catalytic oxidation of VOCs. While bimetallic catalysts exhibit excellent catalytic activity compared with conventional single noble metal catalysts, limited success has been achieved in the influence of the bimetallic effect on the stability and ozone utilization of metal catalysts. Herein, it is necessary to systematically study the enhancement effect in the ozone catalytic reaction induced by the second metal. With a simple continuous impregnation method, a platinum-cerium bimetallic catalyst is prepared. Also highlighted are studies from several aspects of the contribution of the second metal (Ce) to the stability and ozone utilization of the catalysts, including the "electronic effect" and "geometric effect". The synergistic removal rate of toluene and ozone is nearly 100% at 30 °C, and it still shows positive stability after high humidity and a long reaction time. More importantly, the instructive significance, which is the in-depth knowledge of enhanced catalytic mechanism of bimetallic catalysts resulting from a second metal, is provided by this work.
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Affiliation(s)
- Lei Liu
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, China
| | - Ning Wu
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, China
| | - Ming Ouyang
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, China
| | - Yun Xing
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, China
| | - Juntai Tian
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, China
| | - Peirong Chen
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, China
- Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, Guangzhou 510006, China
- National Engineering Laboratory for VOCs Pollution Control Technology and Equipment, Guangzhou 510006, China
| | - Junliang Wu
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, China
- Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, Guangzhou 510006, China
- National Engineering Laboratory for VOCs Pollution Control Technology and Equipment, Guangzhou 510006, China
| | - Yun Hu
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, China
| | - Xiaojun Niu
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, China
| | - Mingli Fu
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, China
- Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, Guangzhou 510006, China
- National Engineering Laboratory for VOCs Pollution Control Technology and Equipment, Guangzhou 510006, China
| | - Daiqi Ye
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, China
- Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, Guangzhou 510006, China
- National Engineering Laboratory for VOCs Pollution Control Technology and Equipment, Guangzhou 510006, China
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5
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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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6
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Xia P, Pan J, Zhang Y, Mao M, Ma L, Chen J, Zhang L, Wang H, Fan H, Gao X, Deng L. Highly sensitive detection of glucose at a novel non-enzyme electrochemical sensing based on Mo-doped CoO Nanosheets. Chem Asian J 2024; 19:e202300951. [PMID: 38105351 DOI: 10.1002/asia.202300951] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Revised: 12/08/2023] [Accepted: 12/15/2023] [Indexed: 12/19/2023]
Abstract
In this work, a Mo doped CoO nanosheet grown on nickel foam (labeled as: Mo-CoO) with defect-rich and improved electron transfer capacity was designed to be used as a novel non-enzyme electrode material. Physical characterizations demonstrated the Mo elements were doped inside of the samples and they were mutually stabilized with each other, resulting in a high structural stability electrochemical catalytical activity even if the content of Mo was low. For non-enzymatic glucose electrochemical sensing, the prepared Mo-CoO-1 showed a remarkable sensitivity of 89.3 mA cm-2 mM-1 , and a low detection limit of 0.43 μM. Density functional theory (DFT) studies revealed that the doped Mo atom exhibited a higher d-band center compared to the Co atom. A stronger p-d orbital hybridization between the glucose and the Mo atoms indicated the enhancement of glucose adsorption and activation. Importantly, Mo-CoO-1 provided a good selectivity and long-term stability, which can be expected to be used in future practical applications.
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Affiliation(s)
- Pengkun Xia
- Hunan Provincial Key Laboratory of Advanced Materials for New Energy Storage and Conversion, School of Materials Science and Engineering, Hunan University of Science and Technology, Xiangtan, 411201, People's Republic of China
| | - Jing Pan
- School of Physics and Electronics, Hunan Key Laboratory for Super-Microstructure and Ultrafast Process, and Hunan Key Laboratory of Nanophotonics and Devices, Central South University, Changsha, 410083, People's Republic of China
| | - Yue Zhang
- School of Physics and Electronics, Hunan Key Laboratory for Super-Microstructure and Ultrafast Process, and Hunan Key Laboratory of Nanophotonics and Devices, Central South University, Changsha, 410083, People's Republic of China
| | - Mingzhen Mao
- School of Physics and Electronics, Hunan Key Laboratory for Super-Microstructure and Ultrafast Process, and Hunan Key Laboratory of Nanophotonics and Devices, Central South University, Changsha, 410083, People's Republic of China
| | - Lei Ma
- School of Physics and Electronics, Hunan Key Laboratory for Super-Microstructure and Ultrafast Process, and Hunan Key Laboratory of Nanophotonics and Devices, Central South University, Changsha, 410083, People's Republic of China
| | - Jianlin Chen
- Department of Pancreatic Surgery, Xiangya Hospital, Central South University, Changsha, 410008, China
- Department of General Surgery, Xiangya Hospital, Central South University, Changsha, 410008, China
| | - Long Zhang
- School of Physics and Electronics, Hunan Key Laboratory for Super-Microstructure and Ultrafast Process, and Hunan Key Laboratory of Nanophotonics and Devices, Central South University, Changsha, 410083, People's Republic of China
| | - Hui Wang
- School of Physics and Electronics, Hunan Key Laboratory for Super-Microstructure and Ultrafast Process, and Hunan Key Laboratory of Nanophotonics and Devices, Central South University, Changsha, 410083, People's Republic of China
| | - Hui Fan
- Hunan Provincial Key Laboratory of Advanced Materials for New Energy Storage and Conversion, School of Materials Science and Engineering, Hunan University of Science and Technology, Xiangtan, 411201, People's Republic of China
| | - Xiaohui Gao
- School of Physics and Electronics, Hunan Key Laboratory for Super-Microstructure and Ultrafast Process, and Hunan Key Laboratory of Nanophotonics and Devices, Central South University, Changsha, 410083, People's Republic of China
| | - Lianwen Deng
- School of Physics and Electronics, Hunan Key Laboratory for Super-Microstructure and Ultrafast Process, and Hunan Key Laboratory of Nanophotonics and Devices, Central South University, Changsha, 410083, People's Republic of China
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7
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Wang X, Li R, Luo X, Mu J, Peng J, Yan G, Wei P, Tian Z, Huang Z, Cao Z. Enhanced CO oxidation performance over hierarchical flower-like Co 3O 4 based nanosheets via optimizing oxygen activation and CO chemisorption. J Colloid Interface Sci 2024; 654:454-465. [PMID: 37857098 DOI: 10.1016/j.jcis.2023.10.069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2023] [Revised: 10/08/2023] [Accepted: 10/15/2023] [Indexed: 10/21/2023]
Abstract
Enhancing low-temperature activity is a focus for carbon monoxide (CO) elimination by catalytic oxidation. In this work, the hierarchical flower-like silver (Ag) modified cobalt oxides (Co3O4) nanosheets were prepared by solvothermal method and applied into catalytic CO oxidation. The doped Ag species in the form of AgCoO2 induced the prolongated surface Co-O bond and weaker bond intensity. Consequently, the oxygen activation/migration ability and redox capacity of Ag0.02Co were enhanced with more oxygen vacancies. The chemisorbed CO was preferentially converted to CO2 but not carbonates. The inhibited carbonates accumulation could avoid the coverage of active sites. According to Density functional theory (DFT) calculations, the electron transfer from AgCoO2 to Co3O4 promote electron donation ability of Co3O4 layer, benefiting for oxygen activation. Moreover, the longer Co-C and C-O bond length suggest the weakened chemisorption strength and higher active of CO molecule. The Ag modified Co3O4 exhibited more satisfactory activity at lower temperature. Typically, it realized 100% CO conversion at 90 °C, and displayed 6.3-fold higher reaction rate than pristine Co3O4 at 40 °C. Moreover, the Ag0.02Co exhibited outstanding long-term stability and water resistance. In summary, the optimized oxygen activation, CO chemisorption and interfacial electron transfer synergistically boosted the CO oxidation activity on Ag modified Co3O4.
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Affiliation(s)
- Xinyang Wang
- School of Environment, Key Laboratory for Yellow River and Huai River Water Environmental Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, Henan Normal University, Xinxiang, Henan 453007, China.
| | - Rui Li
- School of Environment, Key Laboratory for Yellow River and Huai River Water Environmental Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, Henan Normal University, Xinxiang, Henan 453007, China
| | - Xinyu Luo
- School of Environment, Key Laboratory for Yellow River and Huai River Water Environmental Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, Henan Normal University, Xinxiang, Henan 453007, China
| | - Jincheng Mu
- College of Resources and Environmental Engineering, Guizhou University, Guizhou Karst Environmental Ecosystems Observation and Research Station, Ministry of Education, Guiyang 550025, China
| | - Jianbiao Peng
- School of Environment, Key Laboratory for Yellow River and Huai River Water Environmental Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, Henan Normal University, Xinxiang, Henan 453007, China
| | - Guangxuan Yan
- School of Environment, Key Laboratory for Yellow River and Huai River Water Environmental Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, Henan Normal University, Xinxiang, Henan 453007, China
| | - Pengkun Wei
- School of Environment, Key Laboratory for Yellow River and Huai River Water Environmental Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, Henan Normal University, Xinxiang, Henan 453007, China
| | - Zhenbang Tian
- Institute of Chemistry Co. Ltd, Henan Academy of Sciences, Zhengzhou, Henan 450002, China
| | - Zuohua Huang
- Institute of Chemistry Co. Ltd, Henan Academy of Sciences, Zhengzhou, Henan 450002, China
| | - Zhiguo Cao
- School of Environment, Key Laboratory for Yellow River and Huai River Water Environmental Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, Henan Normal University, Xinxiang, Henan 453007, China.
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8
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Tian D, Yang Y, Zhang J, Yue Y, Qian G. Synthesis of cordierite using municipal solid waste incineration fly ash as one additive for enhanced catalytic oxidation of volatile organic compounds. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 906:167420. [PMID: 37774860 DOI: 10.1016/j.scitotenv.2023.167420] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Revised: 09/20/2023] [Accepted: 09/26/2023] [Indexed: 10/01/2023]
Abstract
Municipal solid waste incineration (MSWI) fly ash is a hazardous waste, which needs various recycling in order to reach "net-zero waste". This work aimed to synthesize cordierite using MSWI fly ash as one additive and investigate influence of the additive on properties of the cordierite. As a result, the cordierite was successfully synthesized when the additive weight ratio was <15 % and the synthesis strategy was universally feasible for 14 kinds of different MSWI fly ashes. As a heat accumulator, the cordierite attained compressive strength of 42.1 MPa, water absorption of 26 %, bulk density of 1.87 g·cm-3, and open porosity of 47 %. After five cycles of thermal impact at 1200 °C, the strength was only decreased by 15 %. These properties were comparable to a commercial cordierite. As a catalyst carrier, after loading Mn and Cu species, the cordierite removed 100 % of toluene at 250 °C. In comparison, a commercial cordierite only got a removal of 34.4 %. The enhanced activity was attributed to co-existing spinel and bytownite as well as imbedded Zn and Cu in the MSWI fly ash-added cordierite. Therefore, this work devotes to hazardous recycling, green development, and cycled economy.
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Affiliation(s)
- Daoyuan Tian
- Materials Genome Institute, Shanghai University, 333 Nanchen Road, Shanghai 200444, China
| | - Yimin Yang
- SHU Center of Green Urban Mining & Industry Ecology, School of Environmental and Chemical Engineering, Shanghai University, No. 381 Nanchen Road, Shanghai 200444, China
| | - Jia Zhang
- SHU Center of Green Urban Mining & Industry Ecology, School of Environmental and Chemical Engineering, Shanghai University, No. 381 Nanchen Road, Shanghai 200444, China.
| | - Yang Yue
- SHU Center of Green Urban Mining & Industry Ecology, School of Environmental and Chemical Engineering, Shanghai University, No. 381 Nanchen Road, Shanghai 200444, China
| | - Guangren Qian
- SHU Center of Green Urban Mining & Industry Ecology, School of Environmental and Chemical Engineering, Shanghai University, No. 381 Nanchen Road, Shanghai 200444, China
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9
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Huang Q, Zhao P, Lv L, Zhang W, Pan B. Redox-Induced In Situ Growth of MnO 2 with Rich Oxygen Vacancies over Monolithic Copper Foam for Boosting Toluene Combustion. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023. [PMID: 37289934 DOI: 10.1021/acs.est.3c02103] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Catalytic combustion has been known to be an effective technique in volatile organic compound (VOC) abatement. Developing monolithic catalysts with high activity at low temperatures is vital yet challenging in industrial applications. Herein, monolithic MnO2-Ov/CF catalysts were fabricated via the in situ growth of K2CuFe(CN)6 (CuFePBA, a family of metal-organic frames) over copper foam (CF) followed by a redox-etching route. The as-synthesized monolith MnO2-Ov-0.04/CF catalyst displays a superior low-temperature activity (T90% = 215 °C) and robust durability for toluene elimination even in the presence of 5 vol % water. Experimental results reveal that the CuFePBA template not only guides the in situ growth of δ-MnO2 with high loading over CF but also acts as a source of dopant to create more oxygen vacancies and weaken the strength of the Mn-O bond, which considerably improves the oxygen activation ability of δ-MnO2 and consequently boosts the low-temperature catalytic activity of the monolith MnO2-Ov-0.04/CF toward toluene oxidation. In addition, the reaction intermediate and proposed mechanism in the MnO2-Ov-0.04/CF mediated catalytic oxidation process were investigated. This study provides new insights into the development of highly active monolithic catalysts for the low-temperature oxidation of VOCs.
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Affiliation(s)
- Qianlin Huang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China
| | - Puzhen Zhao
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China
| | - Lu Lv
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China
| | - Weiming Zhang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China
| | - Bingcai Pan
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China
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10
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Zhang Y, Xia P, Fan H, Gao X, Ouyang F, Chen W. In situ growth of the CoO nanoneedle array on a 3D nickel foam toward a high-performance glucose sensor. Dalton Trans 2023; 52:2603-2610. [PMID: 36734601 DOI: 10.1039/d2dt03877c] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
A glucose sensor with high sensitivity and low detection limit is vital for human beings' health. Herein, a CoO nanoneedle array with an unique electronic structure was successfully constructed by a hydrothermal and subsequent high-temperature calcination process. The optimized CoO-400 nanoneedles exhibit a larger electrochemical active surface area, beneficial electronic structure, favorable lattice distortion, and abundant active sites, which effectively promote electrochemical properties toward glucose sensing. The glucose sensor constructed by CoO-400 nanoneedles shows a high sensitivity of 84.23 mA cm-2 mM-1 and low detection limit of 4.4 × 10-7 M, superior to the results from most previous reports. Moreover, outstanding anti-interference ability, superior long-term stability, good repeatability, and satisfactory reproducibility in glucose detection for CoO-400 nanoneedles are also demonstrated.
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Affiliation(s)
- Yue Zhang
- School of Physics and Electronics, Hunan Key Laboratory for Super-Microstructure and Ultrafast Process, and Hunan Key Laboratory of Nanophotonics and Devices, Central South University, Changsha 410083, People's Republic of China.
| | - Pengkun Xia
- Hunan Provincial Key Laboratory of Advanced Materials for New Energy Storage and Conversion, School of Materials Science and Engineering, Hunan University of Science and Technology, Xiangtan 411201, People's Republic of China
| | - Hui Fan
- Hunan Provincial Key Laboratory of Advanced Materials for New Energy Storage and Conversion, School of Materials Science and Engineering, Hunan University of Science and Technology, Xiangtan 411201, People's Republic of China
| | - Xiaohui Gao
- School of Physics and Electronics, Hunan Key Laboratory for Super-Microstructure and Ultrafast Process, and Hunan Key Laboratory of Nanophotonics and Devices, Central South University, Changsha 410083, People's Republic of China.
| | - Fangping Ouyang
- School of Physics and Electronics, Hunan Key Laboratory for Super-Microstructure and Ultrafast Process, and Hunan Key Laboratory of Nanophotonics and Devices, Central South University, Changsha 410083, People's Republic of China.
| | - Wei Chen
- School of Chemistry and Pharmaceutical Sciences, Guangxi Normal university, Guilin 541004, People's Republic of China
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11
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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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12
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Wang L, Gao L, Li A, Wen T, Zhang J, Long C. Insights into the influence of water molecules on selective catalytic ozonation of gaseous ammonia into nitrogen on cryptomelane-type manganese oxide using in-situ DRIFTS. CHEMOSPHERE 2023; 313:137521. [PMID: 36513199 DOI: 10.1016/j.chemosphere.2022.137521] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Revised: 11/05/2022] [Accepted: 12/08/2022] [Indexed: 06/17/2023]
Abstract
Catalytic ozonation is an environmentally friendly technology for the removal of gaseous NH3 due to high NH3 conversion and high N2 selectivity at ambient temperature. However, the influence mechanism of ubiquitous water vapor on catalytic ozonation of NH3 is unclear. In this study, cryptomelane-type manganese oxide (OMS-2) catalyst was prepared and tested for catalytic ozonation of NH3 in different relative humidity. The results showed that water vapor significantly decreased the catalytic activity, which was due to the inhibition of water on NH3 adsorption on Lewis acid sites and O3 decomposition on oxygen vacancies, as well as the combination of water with active oxygen species (O22- and Oatom). And the effect of water vapor on NH3 conversion was more significant than O3 decomposition because more Mn-OH were involved in the O3 decomposition under humid conditions. Combining in-situ DRIFTS results with the performance of NH3 oxidation, it is found that L-2 acid sites (the peak of NH3 adsorption on Lewis acid sites at 1188 cm-1) were the main active sites for adsorption and activation of NH3 in the early stage of catalytic reaction; as the reaction progressed, L-2 acid sites were gradually occupied by water and more Brønsted acid sites participated in the catalytic reaction. This work deepened the understanding of the reaction process for selective catalytic ozonation of NH3, and provided theoretical guidance for the design of efficient hydrophobic catalysts to eliminate gaseous NH3 pollution.
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Affiliation(s)
- Lisha Wang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, 163 Xianlin Avenue, Nanjing, 210023, China
| | - Lei Gao
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, 163 Xianlin Avenue, Nanjing, 210023, China
| | - Aimin Li
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, 163 Xianlin Avenue, Nanjing, 210023, China
| | - Tiancheng Wen
- 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
| | - Chao Long
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, 163 Xianlin Avenue, Nanjing, 210023, China; Quanzhou Institute for Environmental Protection Industry, Nanjing University, Beifeng Road, Quanzhou, 362000, China.
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13
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Regulating CeO2 morphologies on the catalytic oxidation of toluene at lower temperature: a study of the structure-activity relationship. J Catal 2023. [DOI: 10.1016/j.jcat.2023.01.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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14
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Huang Q, Zhao P, Wang W, Lv L, Zhang W, Pan B. In Situ Fabrication of Highly Dispersed Co-Fe-Doped-δ-MnO 2 Catalyst by a Facile Redox-Driving MOFs-Derived Method for Low-Temperature Oxidation of Toluene. ACS APPLIED MATERIALS & INTERFACES 2022; 14:53872-53883. [PMID: 36426993 DOI: 10.1021/acsami.2c16620] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Cost-efficient and durable manganese-based catalysts are in great demand for the catalytic elimination of volatile organic compounds (VOCs), which are dominated not only by the nanostructures but also by the oxygen vacancies and Mn-O bond in the catalysts. Herein, a series of nanostructured Co-Fe-doped-δ-MnO2 catalysts (Co-Fe-δ-MnO2) with high dispersion were in situ fabricated by employing metal-organic-frameworks (MOFs) as reducing agents, dopants, and templates all at the same time. The as-obtained Co-Fe-δ-MnO2-20% catalyst exhibited robust durability and high catalytic activity (225 °C) for toluene combustion even in the presence of 5 vol % water vapor, which is 50 °C lower than that of pristine δ-MnO2. Various characterizations revealed that the homogeneously dispersed codoping of Co and Fe ions into δ-MnO2 promotes the generation of oxygen vacancies and weakens the strength of the Mn-O bond, thus increasing the amount of adsorbed oxygen (Oads) and improving the mobility of lattice oxygen (Olatt). Meanwhile, due to successfully inheriting the framework structures of MOFs, the obtained catalyst exhibited a high surface area and three-dimensional mesoporous structure, which contributes to diffusion and increases the number of active sites. Moreover, in situ DRIFTS results confirmed that the toluene degradation mechanism on the Co-Fe-δ-MnO2-20% follows the MVK mechanism and revealed that more Oads and high-mobility Olatt induced by this novel method contribute to accumulating and mineralizing key intermediates (benzoate) and thus promote toluene oxidation. In conclusion, this work stimulates the opportunities to develop Co-Fe-δ-MnO2 as a class of nonprecious-metal-based catalysts for controlling VOC emissions.
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Affiliation(s)
- Qianlin Huang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing210023, China
| | - Puzhen Zhao
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing210023, China
| | - Weiwei Wang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing210023, China
| | - Lu Lv
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing210023, China
| | - Weiming Zhang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing210023, China
| | - Bingcai Pan
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing210023, China
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15
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Hong W, Liu Y, Zhu T, Wang H, Sun Y, Shen F, Li X. Promoting the Catalytic Ozonation of Toluene by Introducing SO 42- into the α-MnO 2/ZSM-5 Catalyst to Tune Both Oxygen Vacancies and Acid Sites. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2022; 56:15695-15704. [PMID: 36259958 DOI: 10.1021/acs.est.2c05174] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Mn-based catalysts hold the promise of practical applications in catalytic ozonation of toluene at room temperature, yet improvement of toluene conversion and COx selectivity remains challenging. Here, an innovative α-MnO2/ZSM-5 catalyst modified with SO42- was successfully prepared, and both characterizations and density functional theory (DFT) calculations showed that SO42- introduction facilitated the formation of oxygen vacancies, Lewis and Brönsted acid sites, and active oxygen species and enhanced the adsorption ability of toluene on α-MnO2/ZSM-5. Characterizations also showed that SO42- introduction made the catalyst possess larger specific surface area, superior reducibility, and stronger surface acidity. As a result, α-MnO2/ZSM-5 with a S/Mn molar ratio of 0.019 exhibited the best toluene conversion and COx selectivity, 87 and 94%, respectively, after the reaction for 8 h at 30 °C under an initial concentration of 5 ppm toluene and 45 ppm ozone, relative humidity of 45%, and space velocity of 32,000 h-1, far superior to those of non-noble catalysts reported to date under comparable reaction conditions. The synergistic role of increased oxygen vacancies and acid sites of α-MnO2/ZSM-5 modified with SO42- resulted in excellent toluene conversion and COx selectivity. The findings represented a critical step toward the rational design and synthesis of highly efficient catalysts for catalytic ozonation of toluene.
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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, Beijing100191, China
| | - Yan Liu
- School of Space and Environment, Beijing Key Laboratory of Bio-Inspired Energy Materials and Devices, Beihang University, Beijing100191, China
| | - Tianle Zhu
- School of Space and Environment, Beijing Key Laboratory of Bio-Inspired Energy Materials and Devices, Beihang University, Beijing100191, China
| | - Haining Wang
- School of Space and Environment, Beijing Key Laboratory of Bio-Inspired Energy Materials and Devices, Beihang University, Beijing100191, China
| | - Ye Sun
- School of Space and Environment, Beijing Key Laboratory of Bio-Inspired Energy Materials and Devices, Beihang University, Beijing100191, China
| | - Fangxia Shen
- School of Space and Environment, Beijing Key Laboratory of Bio-Inspired Energy Materials and Devices, Beihang University, Beijing100191, China
| | - Xiang Li
- School of Space and Environment, Beijing Key Laboratory of Bio-Inspired Energy Materials and Devices, Beihang University, Beijing100191, China
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16
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Wang T, Fu Q, Wang S, Xing D, Bai Y, Wang S. Enhanced water-resistance of Mn-based catalysts for ambient temperature ozone elimination: Roles of N and Pd modification. CHEMOSPHERE 2022; 303:135014. [PMID: 35598789 DOI: 10.1016/j.chemosphere.2022.135014] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/03/2022] [Revised: 05/12/2022] [Accepted: 05/16/2022] [Indexed: 06/15/2023]
Abstract
Cryptomelane-type MnO2 catalysts own excellent ozone (O3) decomposition performance. However, it is urgent to improve their long-term stability at ambient temperature, especially under the presence of water. In the present study, a modification strategy was proposed by N-doping and the successive Pd introduction. The N-doping of MnO2 by NH4Cl (NH4-MnO2) can increase its activity for O3 decomposition. And almost 100% O3 decomposition was achieved within 24 h under water-free atmosphere at ambient temperature (25 °C). Successive Pd addition further promoted the water-resistance of NH4-MnO2 catalyst under high humidity (RH > 90%). In combination with detailed characterizations, it indicated that the enhancements on stability and water-resistance were attributed to synergistic effect among acid sites, oxygen defects and Pd clusters. Finally, the decomposition mechanism of gaseous O3 was proposed based on three decisive active sites above.
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Affiliation(s)
- Ting Wang
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, PR China; University of Chinese Academy of Sciences, Beijing, 100049, PR China
| | - Qijun Fu
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, PR China; University of Chinese Academy of Sciences, Beijing, 100049, PR China
| | - Sheng Wang
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, PR China; Dalian National Laboratory for Clean Energy, Dalian, 116023, China.
| | - Defeng Xing
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, PR China; University of Chinese Academy of Sciences, Beijing, 100049, PR China
| | - Yuting Bai
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, PR China; Dalian National Laboratory for Clean Energy, Dalian, 116023, China
| | - Shudong Wang
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, PR China; Dalian National Laboratory for Clean Energy, Dalian, 116023, China
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17
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Shen Y, Deng J, Han L, Ren W, Zhang D. Low-Temperature Combustion of Toluene over Cu-Doped SmMn 2O 5 Mullite Catalysts via Creating Highly Active Cu 2+-O-Mn 4+ Sites. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2022; 56:10433-10441. [PMID: 35758155 DOI: 10.1021/acs.est.2c02866] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Catalytic combustion of volatile organic compounds (VOCs) at low temperatures is still an urgent issue to be solved. Herein, low-temperature combustion of toluene over Cu-doped SmMn2O5 mullite catalysts via creating highly active Cu2+-O-Mn4+ sites has been originally demonstrated. Cu-doped SmMn2O5 mullite catalysts exhibited 90% conversion of toluene at 206 °C and displayed robust stability even in the presence of water. It has been demonstrated that Cu doping created Cu2+-O-Mn4+ active composite sites that were more exposed after removing surface Sm species via acid-etching. Benefiting from this, the redox and oxygen activation ability of catalysts was significantly enhanced. The consumption of benzaldehyde and benzoic acid as intermediate species and the CO2 generation ability were apparently promoted, which were the direct reasons for the enhanced low-temperature combustion of toluene. This work provides novel ideas for the development of high-performance catalysts for low-temperature VOC combustion, which has great industrial application prospects.
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Affiliation(s)
- Yongjie Shen
- State Key Laboratory of Advanced Special Steel, School of Materials Science and Engineering, International Joint Laboratory of Catalytic Chemistry, College of Sciences, Shanghai University, Shanghai 200444, China
| | - Jiang Deng
- State Key Laboratory of Advanced Special Steel, School of Materials Science and Engineering, International Joint Laboratory of Catalytic Chemistry, College of Sciences, Shanghai University, Shanghai 200444, China
| | - Lupeng Han
- State Key Laboratory of Advanced Special Steel, School of Materials Science and Engineering, International Joint Laboratory of Catalytic Chemistry, College of Sciences, Shanghai University, Shanghai 200444, China
| | - Wei Ren
- State Key Laboratory of Advanced Special Steel, School of Materials Science and Engineering, International Joint Laboratory of Catalytic Chemistry, College of Sciences, Shanghai University, Shanghai 200444, China
| | - Dengsong Zhang
- State Key Laboratory of Advanced Special Steel, School of Materials Science and Engineering, International Joint Laboratory of Catalytic Chemistry, College of Sciences, Shanghai University, Shanghai 200444, China
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18
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Yin Y, Shi L, Zhang S, Duan X, Zhang J, Sun H, Wang S. Two−dimensional nanomaterials confined single atoms: New opportunities for environmental remediation. NANO MATERIALS SCIENCE 2022. [DOI: 10.1016/j.nanoms.2022.07.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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19
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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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20
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Wang P, Ma X, Hao X, Tang B, Abudula A, Guan G. Oxygen vacancy defect engineering to promote catalytic activity toward the oxidation of VOCs: a critical review. CATALYSIS REVIEWS 2022. [DOI: 10.1080/01614940.2022.2078555] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Peifen Wang
- Department of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan, P. R. China
- Graduate School of Science and Technology, Hirosaki University, Hirosaki, Japan
| | - Xuli Ma
- Department of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan, P. R. China
| | - Xiaogang Hao
- Department of Chemical Engineering, Taiyuan University of Technology, Taiyuan, P. R. China
| | - Bing Tang
- School of Environmental Science and Technology, Guangdong University of Technology, Guangzhou, P.R. China
| | - Abuliti Abudula
- Graduate School of Science and Technology, Hirosaki University, Hirosaki, Japan
| | - Guoqing Guan
- Graduate School of Science and Technology, Hirosaki University, Hirosaki, Japan
- Energy Conversion Engineering Laboratory, Institute of Regional Innovation (IRI), Hirosaki University, Hirosaki, Japan
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21
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Wang H, Liang Z, Liu C, Zhu L, Xu Y, Zhou L, Yan B. Construction of K and Tb Co-doped MnO 2 nanoparticles for enhanced oxidation and detoxication of organic dye waste. CHEMOSPHERE 2022; 297:134104. [PMID: 35218779 DOI: 10.1016/j.chemosphere.2022.134104] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2021] [Revised: 02/08/2022] [Accepted: 02/22/2022] [Indexed: 06/14/2023]
Abstract
Developing low-cost and efficient materials for dye pollutant removal under mild condition remains a great challenge. Here K+ and Tb3+ co-doped porous MnO2 (K-Tb-MnO2) nanoparticles with tailored properties including crystal structure, surface area and catalytic activity have been synthesized. Experimental results reveal that K-Tb-MnO2 nanoparticle has higher specific surface area, Mn3+ content and surface oxygen vacancies than pristine MnO2 nanoparticle and single-doped MnO2 materials, showing the uniqueness of dual-doped metal ions. Using methyl blue (MB) as a model pollutant, its removal efficiency by K-Tb-MnO2 nanoparticles within 5 min is 93.6%, which is 18, 8.3, and 2.9 times higher than that of MnO2, K-MnO2, and Tb-MnO2 nanomaterials, respectively. Oxalic acid triggered MnO2 material dissolving assay and FT-IR spectrum suggested that remarkable performance of K-Tb-MnO2 nanoparticle toward MB removal can be attributed to a combined effect of adsorption (16% MB removal) and catalytic degradation (84% MB removal). Moreover, K-Tb-MnO2 nanoparticle mediated MB degradation is demonstrated to be a combination of non-radical oxidation by Mn3+ and radical-participated degradation, with 1O2 as the main species. And the intermediates and pathways of MB degradation were studied by liquid chromatography-mass spectrometry. Importantly, cell viability experiment suggests that the toxicity of MB dye could be efficiently alleviated after the treatment with K-Tb-MnO2 nanoparticle. These results demonstrate the great potential of the novel K-Tb-MnO2 particles to be used as a highly effective nanomaterials to reduce the risk of dye wastes toward the environment and human health.
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Affiliation(s)
- Haiqing Wang
- Institute of Environmental Research at Greater Bay Area, Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Guangzhou University, Guangzhou, 510006, PR China; School of Environmental Science and Engineering, Shandong University, Qingdao, 266237, PR China
| | - Zhenda Liang
- Institute of Environmental Research at Greater Bay Area, Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Guangzhou University, Guangzhou, 510006, PR China
| | - Chao Liu
- Institute of Environmental Research at Greater Bay Area, Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Guangzhou University, Guangzhou, 510006, PR China
| | - Lishan Zhu
- Institute of Environmental Research at Greater Bay Area, Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Guangzhou University, Guangzhou, 510006, PR China
| | - Yongtao Xu
- Institute of Environmental Research at Greater Bay Area, Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Guangzhou University, Guangzhou, 510006, PR China
| | - Li Zhou
- Institute of Environmental Research at Greater Bay Area, Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Guangzhou University, Guangzhou, 510006, PR China.
| | - Bing Yan
- Institute of Environmental Research at Greater Bay Area, Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Guangzhou University, Guangzhou, 510006, PR China; School of Environmental Science and Engineering, Shandong University, Qingdao, 266237, PR China.
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22
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Zhang L, Xue L, Lin B, Zhao Q, Wan S, Wang Y, Jia H, Xiong H. Noble Metal Single-Atom Catalysts for the Catalytic Oxidation of Volatile Organic Compounds. CHEMSUSCHEM 2022; 15:e202102494. [PMID: 35049142 DOI: 10.1002/cssc.202102494] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Revised: 01/17/2022] [Indexed: 06/14/2023]
Abstract
Volatile organic compounds (VOCs) are detrimental to the environment and human health and must be eliminated before discharging. Oxidation by heterogeneous catalysts is one of the most promising approaches for the VOCs abatement. Precious metal catalysts are highly active for the catalytic oxidation of VOCs, but they are rare and their high price limits large-scale application. Supported metal single-atom catalysts (SACs) have a high atom efficiency and provide the possibility to circumvent such limitations. This Review summarizes recent advances in the use of metal SACs for the complete oxidation of VOCs, such as benzene, toluene, formaldehyde, and methanol, as well as aliphatic and Cl- and S-containing hydrocarbons. The structures of the metal SACs used and the reaction mechanisms of the VOC oxidation are discussed. The most widely used SACs are noble metals supported on oxides, especially on reducible oxides, such as Mn2 O3 and TiO2 . The reactivity of most SACs is related to the activity of surface lattice oxygen of the oxides. Furthermore, several metal SACs show better reactivity and improved S and Cl resistance than the corresponding nanocatalysts, indicating that SACs have potential for application in the oxidation of VOCs. The deactivation and regeneration mechanisms of the metal SACs are also summarized. It is concluded that the application of metal SACs in catalytic oxidation of VOCs is still in its infancy. This Review aims to elucidate structure-performance relationships and to guide the design of highly efficient metal SACs for the catalytic oxidation of VOCs.
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Affiliation(s)
- Lina Zhang
- State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, P. R. China
- National Engineering Laboratory for Green Chemical Productions of Alcohols-Ethers-Esters College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, P. R. China
| | - Linli Xue
- State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, P. R. China
- National Engineering Laboratory for Green Chemical Productions of Alcohols-Ethers-Esters College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, P. R. China
| | - Bingyong Lin
- State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, P. R. China
- National Engineering Laboratory for Green Chemical Productions of Alcohols-Ethers-Esters College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, P. R. China
| | - Qingao Zhao
- State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, P. R. China
| | - Shaolong Wan
- State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, P. R. China
- National Engineering Laboratory for Green Chemical Productions of Alcohols-Ethers-Esters College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, P. R. China
| | - Yong Wang
- Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, WA 99164, USA
| | - Hongpeng Jia
- CAS Center for Excellence in Regional Atmospheric Environment, and Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment Chinese Academy of Sciences, Xiamen, 361021, P. R. China
| | - Haifeng Xiong
- State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, P. R. China
- National Engineering Laboratory for Green Chemical Productions of Alcohols-Ethers-Esters College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, P. R. China
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23
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Chen S, Wang H, Dong F. Activation and characterization of environmental catalysts in plasma-catalysis: Status and challenges. JOURNAL OF HAZARDOUS MATERIALS 2022; 427:128150. [PMID: 34979387 DOI: 10.1016/j.jhazmat.2021.128150] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2021] [Revised: 12/14/2021] [Accepted: 12/22/2021] [Indexed: 06/14/2023]
Abstract
Plasma-catalysis has attracted great attentions in environmental/energy-related fields, but the synergetic mechanism still suffers intractable defects. Key issues are that what kind of catalysts are applicable for plasma system, how are they activated in plasma, and how to characterize them in plasma. This review systematically gives a comprehensive summarization of the selection of catalysts and its activation mechanism in plasma, based on the character of plasma, including physical effects containing the enhancement of discharge intensity and adsorption of reactants, and the utilization of plasma-generated active species such as·O, heat, O3, ultraviolet light and e* . Focus is given to the illumination of the activation mechanisms of catalysts when placed in plasma zone. Subsequently, the novel characterization techniques for catalysts, which may associate properties to performance, are critically overviewed. The challenges and opportunities for the activation and characterizations of catalysts are proposed, and future perspectives are suggested about where the efforts should be made. It is expected that a bridge between catalysts design and character of plasma can be built to shed light on the synergetic mechanism for plasma-catalysis and design of new plasma-catalysis systems.
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Affiliation(s)
- Si Chen
- Yangtze Delta Region Institute (Huzhou), University of Electronic Science and Technology of China, Huzhou 313000, China
| | - Haiqiang Wang
- College of Environmental and Resource Sciences, Zhejiang University, 310058 Hangzhou, China
| | - Fan Dong
- Yangtze Delta Region Institute (Huzhou), University of Electronic Science and Technology of China, Huzhou 313000, China; Research Center for Environmental and Energy Catalysis, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 611731, China.
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24
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Xiao M, Yu X, Guo Y, Ge M. Boosting Toluene Combustion by Tuning Electronic Metal-Support Interactions in In Situ Grown Pt@Co 3O 4 Catalysts. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2022; 56:1376-1385. [PMID: 34939778 DOI: 10.1021/acs.est.1c07016] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Electronic metal-support interaction (EMSI) has attracted great attention in volatile organic compound (VOC) abatement. Herein, Pt@Co3O4 catalysts were prepared via a metal-organic framework (MOF) in situ growth approach to boost toluene degradation. The partial electron transfer from Co3O4 to Pt species was induced by the EMSI effect to generate the electron-rich Pt and Co3+ species. The electrophilic O2 molecules could be activated by picking up the electrons from electron-rich Pt species to form nucleophilic oxygen species, which is conducive to attack C-H bonds in toluene. The redox ability and surface oxygen species activity of catalysts were improved due to strong EMSI. As expected, the excellent toluene activity was achieved, meanwhile exhibiting satisfactory water resistance and long-term stability for toluene combustion. In situ diffuse reflectance infrared Fourier transform spectroscopy results elucidated that surface lattice oxygen species should deeply participate in toluene degradation, which could be efficiently replenished by gaseous oxygen. This work may provide a new idea for exploring the relationship between the electron transfer effect and efficient catalytic performance of VOCs.
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Affiliation(s)
- Menglan Xiao
- State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Xiaolin Yu
- State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Yucong Guo
- State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
| | - Maofa Ge
- State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
- Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, P. R. China
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25
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Yang W, Zhao X, Wang Y, Wang X, Liu H, Yang W, Zhou H, Wu YA, Sun C, Peng Y, Li J. Atomically dispersed Ag on δ-MnO 2via cation vacancy trapping for toluene catalytic oxidation. Catal Sci Technol 2022. [DOI: 10.1039/d2cy01102f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Atomic dispersion of Ag on δ-MnO2 was achieved via H2O2-induced Mn vacancy trapping. Single-atom Ag could activate adjacent lattice oxygen, facilitating methyl oxidation and benzene ring cleavage to improve toluene oxidation activity.
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Affiliation(s)
- Wenhao Yang
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
| | - Xiaoguang Zhao
- Sinopec Research Institute of Petroleum Processing, Beijing 100083, China
| | - Ya Wang
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
| | - Xiyang Wang
- Department of Mechanical and Mechatronics Engineering, and Waterloo Institute for Nanotechnology, University of Waterloo, ON, N2L 3G1, Canada
| | - Hao Liu
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
| | - Weinan Yang
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
| | - Hua Zhou
- Advanced Photon Source, Argonne National Laboratory, Lemont, IL, 60439, USA
| | - Yimin A. Wu
- Department of Mechanical and Mechatronics Engineering, and Waterloo Institute for Nanotechnology, University of Waterloo, ON, N2L 3G1, Canada
| | - Chengjun Sun
- Advanced Photon Source, Argonne National Laboratory, Lemont, IL, 60439, USA
| | - Yue Peng
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
| | - Junhua Li
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
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26
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Ding J, Cheng F, Meng Z, Cao Y, Han F, Chen D, Cao M, Zhang G, Kang J, Xu S, Xu Q. Core-Shell-Like Structured Co 3O 4@SiO 2 Catalyst for Highly Efficient Catalytic Elimination of Ozone. Front Chem 2021; 9:803464. [PMID: 34957055 PMCID: PMC8695612 DOI: 10.3389/fchem.2021.803464] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2021] [Accepted: 11/17/2021] [Indexed: 11/29/2022] Open
Abstract
Co3O4 is an environmental catalyst that can effectively decompose ozone, but is strongly affected by water vapor. In this study, Co3O4@SiO2 catalysts with a core-shell-like structure were synthesized following the hydrothermal method. At 60% relative humidity and a space velocity of 720,000 h−1, the prepared Co3O4@SiO2 obtained 95% ozone decomposition for 40 ppm ozone after 6 h, which far outperformed that of the 25wt% Co3O4/SiO2 catalysts. The superiority of Co3O4@SiO2 is ascribed to its core@shell structure, in which Co3O4 is wrapped inside the SiO2 shell structure to avoid air exposure. This research provides important guidance for the high humidity resistance of catalysts for ozone decomposition.
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Affiliation(s)
- Jingya Ding
- School of Chemistry and Chemical Engineering, Yancheng Institute of Technology, Yancheng, China
| | - Feng Cheng
- Key Laboratory for Advanced Technology in Environmental Protection of Jiangsu Province, Yancheng Institute of Technology, Yancheng, China
| | - Zhen Meng
- School of Chemistry and Chemical Engineering, Yancheng Institute of Technology, Yancheng, China
| | - Yan Cao
- School of Chemistry and Chemical Engineering, Yancheng Institute of Technology, Yancheng, China
| | - Fennv Han
- School of Chemistry and Chemical Engineering, Yancheng Institute of Technology, Yancheng, China
| | - Dongbin Chen
- School of Chemistry and Chemical Engineering, Yancheng Institute of Technology, Yancheng, China
| | - Mingxiang Cao
- School of Chemistry and Chemical Engineering, Yancheng Institute of Technology, Yancheng, China
| | - Guolin Zhang
- School of Mechanical Engineering, Yancheng Institute of Technology, Yancheng, China
| | - Jiahao Kang
- School of Chemistry and Chemical Engineering, Yancheng Institute of Technology, Yancheng, China
| | - Shuxiang Xu
- School of Chemistry and Chemical Engineering, Yancheng Institute of Technology, Yancheng, China
| | - Qi Xu
- School of Chemistry and Chemical Engineering, Yancheng Institute of Technology, Yancheng, China
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27
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Li X, He G, Ma J, Shao X, Chen Y, He H. Boosting the Dispersity of Metallic Ag Nanoparticles and Ozone Decomposition Performance of Ag-Mn Catalysts via Manganese Vacancy-Dependent Metal-Support Interactions. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2021; 55:16143-16152. [PMID: 34751029 DOI: 10.1021/acs.est.1c05765] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Ozone (O3) removal has important implications for environmental protection and human health, and Ag-Mn catalysts have shown promising O3 decomposition. Catalysts with Ag supported on porous cube-like α-Mn2O3 (Ag/Mn-C) with high utilization of Ag were prepared by the impregnation method and showed excellent O3 decomposition activity. Physicochemical characterizations demonstrated that metallic Ag nanoparticles (Agn0) were mainly anchored on manganese vacancies, forming Ag-O-Mn bonds between Agn0 and α-Mn2O3-C. The abundant manganese vacancies of α-Mn2O3-C can lead to Agn0 with a smaller particle size and more uniform dispersion, thereby resulting in markedly enhanced O3 decomposition performance compared to Agn0 with a large particle size and uneven distribution on rod-like α-Mn2O3 (Ag/Mn-R). Under a relative humidity of 65% and a space velocity of 1,110,000 h-1, the conversion of 40 ppm O3 over the 2%Ag/Mn-C catalyst within 6 h (98%) at 30 °C was more than twice as high as that of the 2%Ag/Mn-R catalyst (42%). The study provides guidance for the design of highly efficient Ag-based catalysts and the understanding of the microstructure of supported catalysts.
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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
| | - Guangzhi He
- 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
| | - Xufei Shao
- State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Yingfa Chen
- 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, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
- University of Chinese Academy of Sciences, Beijing 100049, China
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28
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Song Z, Zhao M, Mao Y, Zhang X, Luo J, Liu B, Lu H, Liu W, Xing Y, Zhu X. Turning the structural properties and redox ability of Co-La catalyst in the catalytic oxidation of toluene. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2021.119025] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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29
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Xu Z, Yang W, Si W, Chen J, Peng Y, Li J. A novel γ-like MnO 2 catalyst for ozone decomposition in high humidity conditions. JOURNAL OF HAZARDOUS MATERIALS 2021; 420:126641. [PMID: 34329114 DOI: 10.1016/j.jhazmat.2021.126641] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2021] [Revised: 06/29/2021] [Accepted: 07/11/2021] [Indexed: 06/13/2023]
Abstract
MnO2 catalysts have been widely studied for catalytic gaseous ozone decomposition. However, their poor moisture resistance often leads to undesirable catalytic effects in the presence of high humidity. In this study, a novel catalyst with γ-like MnO2 was synthesized using the selective dissolution method on LaMnO3 perovskites. The as-prepared catalyst exhibited quite stable ozone conversion of ~90% within 12 h under 75% relative humidity (400-800 ppm of ozone, 30 °C, 150 000 mL·g-1·h-1 of WHSV). In contrast, traditional γ-MnO2 catalyst showed deficient resistance to H2O and sensitivity to space velocity. Detailed characterizations showed that the larger number of oxygen vacancies induced by structure reconstruction of the γ-like MnO2 and residual La3+ cations facilitated ozone decomposition in humid atmosphere. Finally, the reaction rate of ozone decomposition was proposed by a kinetic study, which further proved that the amount and hydrophilicity of oxygen vacancies are the determinants of the first-order reaction rate constant.
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Affiliation(s)
- Zhenghao Xu
- State Key Joint Laboratory of Environment Simulation and Pollution Control, National Engineering Laboratory for Multi Flue Gas Pollution Control Technology and Equipment, School of Environment, Tsinghua University, Beijing 100084, PR China
| | - Wenhao Yang
- State Key Joint Laboratory of Environment Simulation and Pollution Control, National Engineering Laboratory for Multi Flue Gas Pollution Control Technology and Equipment, School of Environment, Tsinghua University, Beijing 100084, PR China
| | - Wenzhe Si
- State Key Joint Laboratory of Environment Simulation and Pollution Control, National Engineering Laboratory for Multi Flue Gas Pollution Control Technology and Equipment, School of Environment, Tsinghua University, Beijing 100084, PR China
| | - Jianjun Chen
- State Key Joint Laboratory of Environment Simulation and Pollution Control, National Engineering Laboratory for Multi Flue Gas Pollution Control Technology and Equipment, School of Environment, Tsinghua University, Beijing 100084, PR China
| | - Yue Peng
- State Key Joint Laboratory of Environment Simulation and Pollution Control, National Engineering Laboratory for Multi Flue Gas Pollution Control Technology and Equipment, School of Environment, Tsinghua University, Beijing 100084, PR China.
| | - Junhua Li
- State Key Joint Laboratory of Environment Simulation and Pollution Control, National Engineering Laboratory for Multi Flue Gas Pollution Control Technology and Equipment, School of Environment, Tsinghua University, Beijing 100084, PR China
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30
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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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31
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Efficient Dye Degradation via Catalytic Persulfate Activation using Iron Oxide-Manganese Oxide Core-Shell Particle Doped with Transition Metal Ions. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.116429] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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32
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Li W, Jiang Q, Li D, Ao Z, An T. Density functional theory investigation on selective adsorption of VOCs on borophene. CHINESE CHEM LETT 2021. [DOI: 10.1016/j.cclet.2021.01.026] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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33
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Shao X, Li X, Ma J, Zhang R, He H. Terminal Hydroxyl Groups on Al 2O 3 Supports Influence the Valence State and Dispersity of Ag Nanoparticles: Implications for Ozone Decomposition. ACS OMEGA 2021; 6:10715-10722. [PMID: 34056225 PMCID: PMC8153745 DOI: 10.1021/acsomega.1c00220] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2021] [Accepted: 03/19/2021] [Indexed: 05/19/2023]
Abstract
Ozone is a poisonous gas, so it is necessary to remove excessive ozone in the environment. Catalytic decomposition is an effective way to remove ozone at room temperature. In this work, 10%Ag/nano-Al2O3 and 10%Ag/AlOOH-900 catalysts were synthesized by the impregnation method. The 10%Ag/nano-Al2O3 catalyst showed 89% ozone conversion for 40 ppm O3 for 6 h under a space velocity of 840 000 h-1 and a relative humidity of 65%, which is superior to 10%Ag/AlOOH-900 (45% conversion). The characterization results showed Ag nanoparticles to be the active sites for ozone decomposition, which were more highly dispersed on nano-Al2O3 as a result of the greater density of terminal hydroxyl groups. The understanding of the dispersion and valence of silver species gained in this study will be beneficial to the design of more efficient supported silver catalysts for ozone decomposition in the future.
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Affiliation(s)
- Xufei Shao
- State
Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory
of Energy Environmental Catalysis, Beijing
University of Chemical Technology, Beijing 100029, China
- State
Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese
Academy of Sciences, Beijing 100085, 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
- 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
| | - Runduo Zhang
- State
Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory
of Energy Environmental Catalysis, Beijing
University of Chemical Technology, Beijing 100029, 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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34
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Yu X, Ren Y, Yu D, Chen M, Wang L, Wang R, Fan X, Zhao Z, Cheng K, Chen Y, Gryboś J, Kotarba A, Sojka Z, Wei Y, Liu J. Hierarchical Porous K-OMS-2/3DOM-m Ti 0.7Si 0.3O 2 Catalysts for Soot Combustion: Easy Preparation, High Catalytic Activity, and Good Resistance to H 2O and SO 2. ACS Catal 2021. [DOI: 10.1021/acscatal.1c00748] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Xuehua Yu
- Institute of Catalysis for Energy and Environment, College of Chemistry and Chemical Engineering, Shenyang Normal University, Shenyang, Liaoning 110034, China
| | - Yu Ren
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, 18# Fuxue Road, Chang Ping, Beijing 102249, China
| | - Di Yu
- Institute of Catalysis for Energy and Environment, College of Chemistry and Chemical Engineering, Shenyang Normal University, Shenyang, Liaoning 110034, China
| | - Maozhong Chen
- Institute of Catalysis for Energy and Environment, College of Chemistry and Chemical Engineering, Shenyang Normal University, Shenyang, Liaoning 110034, China
| | - Lanyi Wang
- Institute of Catalysis for Energy and Environment, College of Chemistry and Chemical Engineering, Shenyang Normal University, Shenyang, Liaoning 110034, China
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, 18# Fuxue Road, Chang Ping, Beijing 102249, China
| | - Ruidan Wang
- Institute of Catalysis for Energy and Environment, College of Chemistry and Chemical Engineering, Shenyang Normal University, Shenyang, Liaoning 110034, China
| | - Xiaoqiang Fan
- Institute of Catalysis for Energy and Environment, College of Chemistry and Chemical Engineering, Shenyang Normal University, Shenyang, Liaoning 110034, China
| | - Zhen Zhao
- Institute of Catalysis for Energy and Environment, College of Chemistry and Chemical Engineering, Shenyang Normal University, Shenyang, Liaoning 110034, China
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, 18# Fuxue Road, Chang Ping, Beijing 102249, China
| | - Kai Cheng
- Energy and Catalysis Laboratory, Department of Mechanical and Automation Engineering, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong SAR, China
| | - Yongsheng Chen
- Energy and Catalysis Laboratory, Department of Mechanical and Automation Engineering, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong SAR, China
| | - Joanna Gryboś
- Faculty of Chemistry, Jagiellonian University, ul. Gronostajowa 2, 30-387 Kraków, Poland
| | - Andrzej Kotarba
- Faculty of Chemistry, Jagiellonian University, ul. Gronostajowa 2, 30-387 Kraków, Poland
| | - Zbigniew Sojka
- Faculty of Chemistry, Jagiellonian University, ul. Gronostajowa 2, 30-387 Kraków, Poland
| | - Yuechang Wei
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, 18# Fuxue Road, Chang Ping, Beijing 102249, China
| | - Jian Liu
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, 18# Fuxue Road, Chang Ping, Beijing 102249, China
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35
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Wu P, Jin X, Qiu Y, Ye D. Recent Progress of Thermocatalytic and Photo/Thermocatalytic Oxidation for VOCs Purification over Manganese-based Oxide Catalysts. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2021; 55:4268-4286. [PMID: 33720707 DOI: 10.1021/acs.est.0c08179] [Citation(s) in RCA: 76] [Impact Index Per Article: 25.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Volatile organic compounds (VOCs) are one of the main sources of air pollution, which are of wide concern because of their toxicity and serious threat to the environment and human health. Catalytic oxidation has been proven to be a promising and effective technology for VOCs abatement in the presence of heat or light. As environmentally friendly and low-cost materials, manganese-based oxides are the most competitive and promising candidates for the catalytic degradation of VOCs in thermocatalysis or photo/thermocatalysis. This article summarizes the research and development on various manganese-based oxide catalysts, with emphasis on their thermocatalytic and photo/thermocatalytic purification of VOCs in recent years in detail. Single manganese oxides, manganese-based oxide composites, as well as improving strategies such as morphology regulation, heterojunction engineering, and surface decoration by metal doping or universal acid treatment are reviewed. Besides, manganese-based monoliths for practical VOCs abatementare also discussed. Meanwhile, relevant catalytic mechanisms are also summarized. Finally, the existing problems and prospect of manganese-based oxide catalysts for catalyzing combustion of VOCs are proposed.
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Affiliation(s)
- Peng Wu
- Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China
| | - Xiaojing Jin
- Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China
- Guangdong Provincial Key Lab of Nano-Micro Materials Research, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School, Shenzhen 518055, China
| | - Yongcai Qiu
- Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China
- State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, China
| | - Daiqi Ye
- Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China
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36
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Ma X, Xiao M, Yang X, Yu X, Ge M. Boosting benzene combustion by engineering oxygen vacancy-mediated Ag/CeO 2-Co 3O 4 catalyst via interfacial electron transfer. J Colloid Interface Sci 2021; 594:882-890. [PMID: 33794410 DOI: 10.1016/j.jcis.2021.03.076] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2021] [Revised: 03/12/2021] [Accepted: 03/13/2021] [Indexed: 12/22/2022]
Abstract
Oxygen vacancy (Ov) engineering is a widely accepted effective strategy to manipulate the catalytic activity for volatile organic compounds (VOCs) abatement. Herein, we report the oxygen vacancy-mediated Ag/CeO2-Co3O4 catalyst to boost benzene combustion. The incorporation of Ag species in Ag/CeO2-Co3O4 induces the predominately exposed surface Co3+ sites and structural distortion of Co3O4 as well as rich oxygen vacancy owing to the improved interfacial electron transfer, which promote the adsorption of benzene and the dissociation of oxygen. The low-temperature reducibility and mobility of oxygen species are also improved due to the generation of oxygen vacancy. The isotopic 18O2 exchange experiments demonstrate that abundant oxygen vacancies contribute to the rapid generation of active oxygen species, and the consumed oxygen vacancies can be compensated steadily during benzene oxidation. In-situ DRIFTS results reveal that benzene oxidation is a continuous oxidation process, and active oxygen species plays a crucial role in the deep oxidation of benzene by engineering oxygen vacancy. This work provides an efficient strategy for designing high-performance environmental catalysts for VOCs abatement.
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Affiliation(s)
- Xiuyun Ma
- State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China
| | - Menglan Xiao
- State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China
| | - Xueqin Yang
- College of Forestry, Henan Agricultural University, Zhengzhou 450002, PR China
| | - Xiaolin Yu
- State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China.
| | - Maofa Ge
- State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China; Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, PR China
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Zong W, Guo Z, Wu M, Yi X, Zhou H, Jing S, Zhan J, Liu L, Liu Y. Synergistic multiple active species driven fast estrone oxidation by δ-MnO 2 in the existence of methanol. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 761:143201. [PMID: 33158530 DOI: 10.1016/j.scitotenv.2020.143201] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2020] [Revised: 10/15/2020] [Accepted: 10/17/2020] [Indexed: 06/11/2023]
Abstract
Endocrine-disrupting chemicals (EDCs) cause serious threats to human health. Five types of MnO2 were synthesized and characterized. They exhibited different removal performances for three EDCs, i.e., estrone (E1), ethynylestradiol (EE2) and bisphenol A (BPA). Only δ-MnO2 can completely remove E1 within 120 min at pH 3.0. Free Mn (III) was determined at the beginning of the reaction and participated in the EDCs removal process. Electron spin resonance (ESR) indicated that δ-MnO2 could produce superoxide anions (·O2-) and singlet oxygen (1O2) in the existence of methanol. The reactive oxygen species (ROS) quenching experiments showed 1O2 have certain contribution to the E1 removal by δ-MnO2. The source of ROS is mainly the lattice oxygen from δ-MnO2, and can be replenished through the layer structure destruction caused by the reaction between Mn(III) and E1. The ROS dependent EDCs removal by δ-MnO2 leads to a deep understanding on this well-known oxidant.
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Affiliation(s)
- Wenjing Zong
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Ocean Science and Technology, Panjin Campus, Dalian University of Technology, China
| | - Zhaoming Guo
- School of Life Science and Medicine, Panjin Campus, Dalian University of Technology, China
| | - Minghuo Wu
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Ocean Science and Technology, Panjin Campus, Dalian University of Technology, China
| | - Xianliang Yi
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Ocean Science and Technology, Panjin Campus, Dalian University of Technology, China
| | - Hao Zhou
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Ocean Science and Technology, Panjin Campus, Dalian University of Technology, China.
| | - Siyuan Jing
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Ocean Science and Technology, Panjin Campus, Dalian University of Technology, China
| | - Jingjing Zhan
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Ocean Science and Technology, Panjin Campus, Dalian University of Technology, China
| | - Lifen Liu
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Ocean Science and Technology, Panjin Campus, Dalian University of Technology, China
| | - Yang Liu
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Ocean Science and Technology, Panjin Campus, Dalian University of Technology, China.
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Lin F, Wang Z, Zhang Z, Xiang L, Yuan D, Yan B, Wang Z, Chen G. Comparative Investigation on Chlorobenzene Oxidation by Oxygen and Ozone over a MnO x/Al 2O 3 Catalyst in the Presence of SO 2. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2021; 55:3341-3351. [PMID: 33605716 DOI: 10.1021/acs.est.0c07862] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Catalytic oxidation of volatile organic compounds (VOCs) usually encounters complicated components in flue gas causing severe deactivation that restrict its application in specific conditions. The Cl substitution in chlorobenzene further increases poisoning risks. Ozone assistance has unique superiority that can overcome these bottleneck problems. Herein, this study performs a comparative investigation of CB oxidation by oxygen and ozone over a simple Mn/Al2O3 catalyst. CB conversion suffered from slight deactivation in oxygen atmosphere (from 90 to 70%) and more severe deactivation in the presence of SO2 (from 90 to 45%) at 480 °C. Introduction of ozone successfully attained high CB conversion at low temperature (120 °C) with excellent stability and less byproducts. Especially, CB oxidation by ozone maintained its original conversion in the presence of SO2. The deactivation process was simulated by synthesizing several sulfated catalysts. Direct sulfation on Mn/Al2O3 attained more severe deactivation in CB conversion and CO2 formation than sulfation on the Al2O3 support. Ozone with a strong oxidation property promoted the CB oxidation cycle, facilitated desorption of carbonaceous intermediates, and protected MnOx species from severe erosion, thus exhibiting high and stable performance in CB oxidation.
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Affiliation(s)
- Fawei Lin
- School of Environmental Science and Engineering, Tianjin University/Tianjin Key Lab of Biomass/Wastes Utilization, Tianjin 300072, P. R. China
| | - Zhi Wang
- School of Environmental Science and Engineering, Tianjin University/Tianjin Key Lab of Biomass/Wastes Utilization, Tianjin 300072, P. R. China
| | - Zhiman Zhang
- School of Environmental Science and Engineering, Tianjin University/Tianjin Key Lab of Biomass/Wastes Utilization, Tianjin 300072, P. R. China
| | - Li Xiang
- School of Environmental Science and Engineering, Tianjin University/Tianjin Key Lab of Biomass/Wastes Utilization, Tianjin 300072, P. R. China
| | - Dingkun Yuan
- The Institute for Energy Engineering, China Jiliang University, Hangzhou 310000, P. R. China
| | - Beibei Yan
- School of Environmental Science and Engineering, Tianjin University/Tianjin Key Lab of Biomass/Wastes Utilization, Tianjin 300072, P. R. China
| | - Zhihua Wang
- State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, P. R. China
| | - Guanyi Chen
- School of Mechanical Engineering, Tianjin University of Commerce, Tianjin 300134, P. R. China
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Yang R, Fan Y, Ye R, Tang Y, Cao X, Yin Z, Zeng Z. MnO 2 -Based Materials for Environmental Applications. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2021; 33:e2004862. [PMID: 33448089 DOI: 10.1002/adma.202004862] [Citation(s) in RCA: 124] [Impact Index Per Article: 41.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Revised: 08/31/2020] [Indexed: 06/12/2023]
Abstract
Manganese dioxide (MnO2 ) is a promising photo-thermo-electric-responsive semiconductor material for environmental applications, owing to its various favorable properties. However, the unsatisfactory environmental purification efficiency of this material has limited its further applications. Fortunately, in the last few years, significant efforts have been undertaken for improving the environmental purification efficiency of this material and understanding its underlying mechanism. Here, the aim is to summarize the recent experimental and computational research progress in the modification of MnO2 single species by morphology control, structure construction, facet engineering, and element doping. Moreover, the design and fabrication of MnO2 -based composites via the construction of homojunctions and MnO2 /semiconductor/conductor binary/ternary heterojunctions is discussed. Their applications in environmental purification systems, either as an adsorbent material for removing heavy metals, dyes, and microwave (MW) pollution, or as a thermal catalyst, photocatalyst, and electrocatalyst for the degradation of pollutants (water and gas, organic and inorganic) are also highlighted. Finally, the research gaps are summarized and a perspective on the challenges and the direction of future research in nanostructured MnO2 -based materials in the field of environmental applications is presented. Therefore, basic guidance for rational design and fabrication of high-efficiency MnO2 -based materials for comprehensive environmental applications is provided.
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Affiliation(s)
- Ruijie Yang
- Department of Materials Science and Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong, 999077, 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
| | - Ruquan Ye
- Department of Chemistry, State Key Lab of Marine Pollution, City University of Hong Kong, Hong Kong, 999077, P. R. China
| | - Yuxin Tang
- College of Chemical Engineering, Fuzhou University, Fuzhou, 350116, P. R. China
| | - Xiehong Cao
- College of Materials Science and Engineering, Zhejiang University of Technology, 18 Chaowang Road, Hangzhou, Zhejiang, 310014, P. R. China
| | - Zongyou Yin
- Research School of Chemistry, Australian National University, Canberra, ACT, 2601, Australia
| | - 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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Yang W, Wang Y, Yang W, Liu H, Li Z, Peng Y, Li J. Surface In Situ Doping Modification over Mn 2O 3 for Toluene and Propene Catalytic Oxidation: The Effect of Isolated Cu δ+ Insertion into the Mezzanine of Surface MnO 2 Cladding. ACS APPLIED MATERIALS & INTERFACES 2021; 13:2753-2764. [PMID: 33401915 DOI: 10.1021/acsami.0c19972] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Heterocation insertion and substitution in tunnels and mezzanines of MnO2 present significant influences on the microchemical environment at the surfaces and interfaces. An innovative surface in situ doping modification method via Cu2+-H+/KMnO4 treatment was applied onto the Mn2O3 surface to provide Mn2O3@MnO2 nanospheres. Cu was stabilized into resulting MnO2 cladding substituting original K+ during a mild comproportionation reaction between Mn(VII) and Mn(III). The Cu25 (Cu(II): Mn(VII)atomic = 25%) catalyst shows significant promotion of the catalytic performance compared with bare Mn2O3 and Cu0 (without Cu involving). Isolated Cuδ+ was predominantly inserted into the mezzanine of the [MnO6]δ- layers in MnO2 instead of K+, leading to slight electron transfer from Cuδ+ to outermost Mn(4-ε)+ and a decrease of interlayer spacing as well as crystallinity. Such a configuration facilitates the formation of additional oxygen vacancies, promoting the redox ability and oxygen mobility at relatively low temperatures. The mechanistic study reveals that Cuδ+ in MnO2 cladding boosts the activation of toluene (methyl) to form benzoates and propene (methyl and double bonds) to form carboxylates, enhancing the chemical adsorption of reactants. Moreover, it also inhibits the unfavored accumulation of incomplete oxidized intermediates on the surface at high temperatures.
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Affiliation(s)
- Wenhao Yang
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
| | - Ya Wang
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
| | - Weinan Yang
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
| | - Hao Liu
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
| | - Zhenguo Li
- National Engineering Laboratory for Mobile Source Emission Control Technology, China Automotive Technology & Research Center Co., Ltd, Tianjin 300300, China
| | - Yue Peng
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
| | - Junhua Li
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
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41
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Wang M, Zhang Y, Yu Y, Shan W, He H. Synergistic Effects of Multicomponents Produce Outstanding Soot Oxidation Activity in a Cs/Co/MnO x Catalyst. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2021; 55:240-248. [PMID: 33337142 DOI: 10.1021/acs.est.0c06082] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The control of soot emission from diesel vehicles is of extraordinary importance to the environment, and catalytic removal of soot is a highly effective and clean method. Here, we report a novel, non-noble metal catalyst for application in the catalytic combustion of soot with superb activity and resistance to H2O and SO2. MnOx oxide was prepared via a hydrothermal method, and then, Cs and Co were loaded on MnOx by impregnation. The 5%Cs/1%Co/MnOx catalyst displayed excellent catalytic activity with values of T10 (332 °C), T50 (371 °C), and T90 (415 °C) under loose contact. The as-prepared catalysts were investigated by X-ray powder diffraction (XRD), transmission electron microscopy (TEM), H2 temperature-programmed reduction (TPR), O2 temperature-programmed desorption (TPD), X-ray photoelectron spectroscopy (XPS), and X-ray absorption fine structure (XAFS). The results suggest that, after the introduction of Cs and Co into the MnOx oxide, more NO2 molecules take part in soot oxidation, exhibiting higher NO2 utilization efficiency; this is due to the synergistic effects of multiple components (Cs, Co, and Mn) promoting the generation of more surface-active oxygen and then accelerating the reaction between NO2 and soot. This study provides significant insights into the development of high-efficiency catalysts for soot oxidation, and the developed 5%Cs/1%Co/MnOx catalyst is a promising candidate for application in diesel particulate filters.
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Affiliation(s)
- Meng Wang
- Center for Excellence in Regional Atmospheric Environment, Chinese Academy of Sciences, Xiamen 361021, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yan Zhang
- Center for Excellence in Regional Atmospheric Environment, Chinese Academy of Sciences, Xiamen 361021, China
- Ningbo Urban Environment Observation and Research Station, Institute of Urban Environment, Chinese Academy of Sciences, Ningbo 315800, China
| | - Yunbo Yu
- Center for Excellence in Regional Atmospheric Environment, Chinese Academy of Sciences, Xiamen 361021, China
- 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
| | - Wenpo Shan
- Center for Excellence in Regional Atmospheric Environment, Chinese Academy of Sciences, Xiamen 361021, China
- Ningbo Urban Environment Observation and Research Station, Institute of Urban Environment, Chinese Academy of Sciences, Ningbo 315800, China
| | - Hong He
- Center for Excellence in Regional Atmospheric Environment, Chinese Academy of Sciences, Xiamen 361021, China
- 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
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42
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Three-dimensional (3D) hierarchical Mn2O3 catalysts with the highly efficient purification of benzene combustion. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2020.117633] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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43
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Fang C, Li D, Wang X, Wang Y, Chen J, Luo M. Exploring an efficient manganese oxide catalyst for ozone decomposition and its deactivation induced by water vapor. NEW J CHEM 2021. [DOI: 10.1039/d1nj01381e] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
A series of MnOx catalysts supported by carbon spheres were prepared by calcining mixtures of manganese acetate and carbon spheres under a nitrogen atmosphere, and their performance for ozone decomposition under high humidity conditions (RH = 90%) was evaluated.
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Affiliation(s)
- Chentao Fang
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials
- Zhejiang Key Laboratory for Reactive Chemistry on Solid Surfaces
- Institute of Physical Chemistry
- Zhejiang Normal University
- Jinhua 321004
| | - Dandan Li
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials
- Zhejiang Key Laboratory for Reactive Chemistry on Solid Surfaces
- Institute of Physical Chemistry
- Zhejiang Normal University
- Jinhua 321004
| | - Xufang Wang
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials
- Zhejiang Key Laboratory for Reactive Chemistry on Solid Surfaces
- Institute of Physical Chemistry
- Zhejiang Normal University
- Jinhua 321004
| | - Yuejuan Wang
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials
- Zhejiang Key Laboratory for Reactive Chemistry on Solid Surfaces
- Institute of Physical Chemistry
- Zhejiang Normal University
- Jinhua 321004
| | - Jian Chen
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials
- Zhejiang Key Laboratory for Reactive Chemistry on Solid Surfaces
- Institute of Physical Chemistry
- Zhejiang Normal University
- Jinhua 321004
| | - Mengfei Luo
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials
- Zhejiang Key Laboratory for Reactive Chemistry on Solid Surfaces
- Institute of Physical Chemistry
- Zhejiang Normal University
- Jinhua 321004
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44
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Luo X, Su T, Xie X, Qin Z, Ji H. The Adsorption of Ozone on the Solid Catalyst Surface and the Catalytic Reaction Mechanism for Organic Components. ChemistrySelect 2020. [DOI: 10.1002/slct.202003805] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Xuan Luo
- School of Chemistry and Chemical Engineering Guangxi University 100 Daxue Rd. Nanning Guangxi P. R. China 530004
| | - Tongming Su
- School of Chemistry and Chemical Engineering Guangxi University 100 Daxue Rd. Nanning Guangxi P. R. China 530004
| | - Xinling Xie
- School of Chemistry and Chemical Engineering Guangxi University 100 Daxue Rd. Nanning Guangxi P. R. China 530004
| | - Zuzeng Qin
- School of Chemistry and Chemical Engineering Guangxi University 100 Daxue Rd. Nanning Guangxi P. R. China 530004
| | - Hongbing Ji
- School of Chemistry and Chemical Engineering Guangxi University 100 Daxue Rd. Nanning Guangxi P. R. China 530004
- School of Chemistry Sun Yat-sen University 135 Xingang Xi Rd. Guangzhou P. R. China 510275
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45
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Soot Combustion over Niobium-Doped Cryptomelane (K-OMS-2) Nanorods—Redox State of Manganese and the Lattice Strain Control the Catalysts Performance. Catalysts 2020. [DOI: 10.3390/catal10121390] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
A series of Nb-doped (0–23 wt%) cryptomelane catalyst (Nb-K-OMS-2) was synthesized and thoroughly characterized by XRD, TEM/EDX, XRF, XPS, XAS, UV-Vis, and Raman techniques corroborated by the work function measurements. The obtained catalysts were tested for soot oxidation (Printex U) in model tight and loose contact modes. It was shown that the catalytic properties of the Nb-K-OMS-2 are controlled by the amount of Nb dopant in a strongly non-monotonous way. The introduction of niobium gives rise to the strain in the cryptomelane lattice, accompanied by significant Mn+3/Mn+4 ratio variations and concomitant work function changes. The isotopic exchange experiments revealed that the catalytic activity of the Nb-OMS-2 catalysts in soot combustion proceeds via the pathways, where both the activated suprafacial 18O and the surface 16O2− species participate together in the reaction. The niobium doping level controls the non-monotonous changes of the catalyst work function and the lattice strain, and variations of these parameters correlate well with the observed deSoot activity. To our best knowledge, the role of the lattice strain of the cryptomelane catalysts was documented for the first time in this study.
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Abstract
The effect of Mn impregnation on the NH3-SCR (selective catalytic reduction of NOx by NH3) activity of in situ synthesized Cu-SSZ-13 was investigated in this work. It was found that Mn addition could efficiently improve the low-temperature activity of Cu-SSZ-13. The optimal amount of Mn was 5 wt.%, and NOx conversion was improved by more than 20% over a temperature range of 120 °C to 150 °C. SEM (scanning electron microscopy), XRD (X-ray diffraction), N2 adsorption-desorption, H2-TPR (temperature programmed reduction of H2), NH3-TPD (temperature programmed desorption of NH3) and in situ DRIFTS (diffuse reflectance infrared Fourier transform spectroscopy) experiments were conducted to investigate the changes in the zeolite structure, active sites, acid sites and reaction mechanism. The impregnated MnOx species caused a decline in the crystallinity of Cu-SSZ-13 but markedly improved the redox ability. Nitrate and nitrite species were observed in the Mn-modified Cu-SSZ-13, and the formation of these species was thought to cause the observed increase in low-temperature NH3-SCR activity. The results show that the addition of Mn is a promising method for promoting the low-temperature catalytic activity of Cu-SSZ-13.
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Cui W, Li J, Chen L, Dong X, Wang H, Sheng J, Sun Y, Zhou Y, Dong F. Nature-inspired CaCO 3 loading TiO 2 composites for efficient and durable photocatalytic mineralization of gaseous toluene. Sci Bull (Beijing) 2020; 65:1626-1634. [PMID: 36659038 DOI: 10.1016/j.scib.2020.05.024] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Revised: 05/06/2020] [Accepted: 05/11/2020] [Indexed: 01/21/2023]
Abstract
The accumulation of intermediates or final products on TiO2 during photocatalytic volatile organic compounds (VOCs) degradation is typically neglected, despite the fact that it could result in the block of active sites and the deactivation of photocatalysts. Inspired from the natural formation of stalactite (CaCO3 + H2O + CO2 ↔ Ca(HCO3)2), we fabricated CaCO3 loading TiO2 composites (CCT21) to realize the spontaneously transfer of accumulated final products (CO2 and H2O). Efficient and durable performance for gaseous toluene removal has been demonstrated and the cost of photocatalyst is greatly reduced by the comparison of specific activity. The introduction of CaCO3 induces the interaction between TiO2 and CaCO3 to stimulate abundant activated electrons for the improvement on the adsorption and activation of reactants and the transformation of photogenerated carriers, and most importantly, facilitates the transfer of final products to release active sites and thus suppress the deactivation of TiO2. Furthermore, we develop a facile method to immobilize CCT21 powder on flexible support, which greatly reduces the loss of photocatalysts and correspondingly enables the practical application of TiO2-based products. Therefore, this work presents a novel nature-inspired strategy to address the challenge of deactivation, and advances the development of photocatalytic technology for environmental remediation.
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Affiliation(s)
- Wen Cui
- The Center of New Energy Materials and Technology, School of New Energy and Materials, Southwest Petroleum University, Chengdu 610500, China; Research Center for Environmental and Energy Catalysis, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 611731, China
| | - Jieyuan Li
- Research Center for Environmental and Energy Catalysis, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 611731, China
| | - Lvcun Chen
- The Center of New Energy Materials and Technology, School of New Energy and Materials, Southwest Petroleum University, Chengdu 610500, China; Research Center for Environmental and Energy Catalysis, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 611731, China
| | - Xing'an Dong
- Research Center for Environmental and Energy Catalysis, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 611731, China
| | - Hong Wang
- Research Center for Environmental and Energy Catalysis, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 611731, China
| | - Jianping Sheng
- Research Center for Environmental and Energy Catalysis, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 611731, China
| | - Yanjuan Sun
- School of Resources and Environment, University of Electronic Science and Technology of China, Chengdu 611731, China
| | - Ying Zhou
- The Center of New Energy Materials and Technology, School of New Energy and Materials, Southwest Petroleum University, Chengdu 610500, China
| | - Fan Dong
- The Center of New Energy Materials and Technology, School of New Energy and Materials, Southwest Petroleum University, Chengdu 610500, China; Research Center for Environmental and Energy Catalysis, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 611731, China.
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Lian J, Yin D, Zhao S, Zhu X, Liu Q, Zhang X, Zhang X. Core-shell structured Ag-CoO nanoparticles with superior peroxidase-like activity for colorimetric sensing hydrogen peroxide and o-phenylenediamine. Colloids Surf A Physicochem Eng Asp 2020. [DOI: 10.1016/j.colsurfa.2020.125283] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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49
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Li X, Ma J, He H. Tuning the Chemical State of Silver on Ag-Mn Catalysts to Enhance the Ozone Decomposition Performance. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2020; 54:11566-11575. [PMID: 32786590 DOI: 10.1021/acs.est.0c02510] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Ag-Mn catalysts with excellent water resistance and ozone decomposition activity were successfully synthesized by simple precipitation and impregnation methods. Under a relative humidity of 65% and space velocity of 840,000 h-1, the 6%Ag/α-Mn2O3-I catalyst showed 99% conversion of 40 ppm O3 after 6 h, which was far superior to the performance of the 6%AgMnOx-C (49%), 6%Ag/MnCO3-I (32%), and α-Mn2O3 (5%) catalysts. Physicochemical characterization indicated that the chemical state of Ag on the Ag-Mn catalysts determined the O3 decomposition activity of the catalysts. The Ag species on the 6%Ag/α-Mn2O3-I catalyst were mainly metallic silver nanoparticles (Agn0), which exhibited much better ozone decomposition performance than the Ag1.8Mn8O16 and oxidized silver clusters (Agnδ+) existing on the 6%Ag/MnCO3-I and 6%AgMnOx-C catalysts. The 6%Ag/α-Mn2O3-I catalyst still had above 85% ozone conversion after 60 h under a relative humidity of 65% and space velocity of 840,000 h-1. The slight deactivation of the catalyst was ascribed to the oxidation of Agn0, and its activity could be completely recovered by treatment at 350 °C under an N2 atmosphere, which indicated that it is a promising catalyst for ozone decomposition. This research provides guidance for the subsequent development of Ag-Mn catalysts for ozone decomposition with high activity.
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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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50
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Shen Y, Deng J, Impeng S, Li S, Yan T, Zhang J, Shi L, Zhang D. Boosting Toluene Combustion by Engineering Co-O Strength in Cobalt Oxide Catalysts. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2020; 54:10342-10350. [PMID: 32668146 DOI: 10.1021/acs.est.0c02680] [Citation(s) in RCA: 76] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Exploring active and low-cost transition metal oxides (TMOs) based catalysts for volatile organic compounds (VOCs) abatement is vital for air pollution control technologies. Since 18 oxygen atoms are required for the complete mineralization of a toluene molecule, the participation of a large amount of active oxygen is a key requirement for the catalytic oxidation of toluene. Here, toluene degradation was improved by weakening the Co-O bond strength on the surface of cobalt oxide, so as to increase the amount of active oxygen species, while maintaining the high stability of the catalyst for toluene combustion. The bond strength of Co-O and the amount of surface active O2 was regulated by tuning the pyrolysis temperature. The catalyst's redox ability and surface oxygen species activity are improved due to the weakening of the Co-O bond strength. It has been demonstrated that active oxygen plays a crucial role in boosting toluene combustion by engineering Co-O strength in cobalt oxide catalysts. This work provides a new understanding of the exploration and development of high-performance TMO catalysts for VOCs abatement.
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Affiliation(s)
- Yongjie Shen
- State Key Laboratory of Advanced Special Steel, School of Materials Science and Engineering, International Joint Laboratory of Catalytic Chemistry, Department of Chemistry, Research Center of Nano Science and Technology, College of Sciences, Shanghai University, Shanghai 200444, P. R. China
| | - Jiang Deng
- State Key Laboratory of Advanced Special Steel, School of Materials Science and Engineering, International Joint Laboratory of Catalytic Chemistry, Department of Chemistry, Research Center of Nano Science and Technology, College of Sciences, Shanghai University, Shanghai 200444, P. R. China
| | - Sarawoot Impeng
- National Nanotechnology Center, National Science and Technology Development Agency, Bangkok 12120, Pathum Thani, Thailand
| | - Shuangxi Li
- State Key Laboratory of Advanced Special Steel, School of Materials Science and Engineering, International Joint Laboratory of Catalytic Chemistry, Department of Chemistry, Research Center of Nano Science and Technology, College of Sciences, Shanghai University, Shanghai 200444, P. R. China
| | - Tingting Yan
- State Key Laboratory of Advanced Special Steel, School of Materials Science and Engineering, International Joint Laboratory of Catalytic Chemistry, Department of Chemistry, Research Center of Nano Science and Technology, College of Sciences, Shanghai University, Shanghai 200444, P. R. China
| | - Jianping Zhang
- State Key Laboratory of Advanced Special Steel, School of Materials Science and Engineering, International Joint Laboratory of Catalytic Chemistry, Department of Chemistry, Research Center of Nano Science and Technology, College of Sciences, Shanghai University, Shanghai 200444, P. R. China
| | - Liyi Shi
- State Key Laboratory of Advanced Special Steel, School of Materials Science and Engineering, International Joint Laboratory of Catalytic Chemistry, Department of Chemistry, Research Center of Nano Science and Technology, College of Sciences, Shanghai University, Shanghai 200444, P. R. China
| | - Dengsong Zhang
- State Key Laboratory of Advanced Special Steel, School of Materials Science and Engineering, International Joint Laboratory of Catalytic Chemistry, Department of Chemistry, Research Center of Nano Science and Technology, College of Sciences, Shanghai University, Shanghai 200444, P. R. China
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