1
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Huang Z, Li H, Zhang X, Mao Y, Wu Y, Liu W, Gao H, Zhang M, Song Z. Catalytic oxidation of toluene by manganese oxides: Effect of K + doping on oxygen vacancy. J Environ Sci (China) 2024; 142:43-56. [PMID: 38527895 DOI: 10.1016/j.jes.2023.07.036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2023] [Revised: 07/25/2023] [Accepted: 07/25/2023] [Indexed: 03/27/2024]
Abstract
Alkali metal potassium was beneficial to the electronic regulation and structural stability of transition metal oxides. Herein, K ions were introduced into manganese oxides by different methods to improve the degradation efficiency of toluene. The results of activity experiments indicated that KMnO4-HT (HT: Hydrothermal method) exhibited outstanding low-temperature catalytic activity, and 90% conversion of toluene can be achieved at 243°C, which was 41°C and 43°C lower than that of KNO3-HT and Mn-HT, respectively. The largest specific surface area was observed on KMnO4-HT, facilitating the adsorption of toluene. The formation of cryptomelane structure over KMnO4-HT could contribute to higher content of Mn3+ and lattice oxygen (Olatt), excellent low-temperature reducibility, and high oxygen mobility, which could increase the catalytic performance. Furthermore, two distinct degradation pathways were inferred. Pathway Ⅰ (KMnO4-HT): toluene → benzyl → benzoic acid → carbonate → CO2 and H2O; Pathway ⅠⅠ (Mn-HT): toluene → benzyl alcohol → benzoic acid → phenol → maleic anhydride → CO2 and H2O. Fewer intermediates were detected on KMnO4-HT, indicating its stronger oxidation capacity of toluene, which was originated from the doping of K+ and the interaction between KOMn. More intermediates were observed on Mn-HT, which can be attributed to the weaker oxidation ability of pure Mn. The results indicated that the doping of K+ can improve the catalytic oxidation capacity of toluene, resulting in promoted degradation of intermediates during the oxidation of toluene.
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Affiliation(s)
- Zhenzhen Huang
- Faculty of Environmental and Municipal Engineering, Henan Key Laboratory of Water Pollution Control and Rehabilitation Technology, Henan University of Urban Construction, Pingdingshan 467036, China
| | - Haiyang Li
- College of Environmental and Safety Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China
| | - Xuejun Zhang
- College of Environmental and Safety Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China.
| | - Yanli Mao
- Faculty of Environmental and Municipal Engineering, Henan Key Laboratory of Water Pollution Control and Rehabilitation Technology, Henan University of Urban Construction, Pingdingshan 467036, China
| | - Yinghan Wu
- College of Environmental and Safety Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China
| | - Wei Liu
- College of Environmental and Safety Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China
| | - Hongrun Gao
- College of Environmental and Safety Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China
| | - Mengru Zhang
- College of Environmental and Safety Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China
| | - Zhongxian Song
- Faculty of Environmental and Municipal Engineering, Henan Key Laboratory of Water Pollution Control and Rehabilitation Technology, Henan University of Urban Construction, Pingdingshan 467036, China.
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Li X, Chen R, Yang M, Niu Y, Li J, Shao D, Zheng X, Zhang C, Qi Y. Insight into modified CeMn based catalysts for efficient degradation of toluene by in situ infrared. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 912:169192. [PMID: 38097085 DOI: 10.1016/j.scitotenv.2023.169192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2023] [Revised: 12/02/2023] [Accepted: 12/06/2023] [Indexed: 12/17/2023]
Abstract
Trace activated carbon (AC) and diatomaceous earth (DE) were used as structural promoters to be incorporated into Ce-Mn-based solid-solution catalysts by the redox precipitation method. The modified catalysts exhibit superior reducibility, with abundant Ce3+, Mn3+and reactive oxygen species, which are facilitated to the migration of oxygen and the generation of oxygen vacancies. In particular, the catalytic combustion temperatures of 90 % toluene (3000 ppm) on Ce1Mn3Ox-AC/DE were 84 °C (dry) and 123 °C (10 vol% H2O), respectively. The role of lattice oxygen and adsorbed oxygen was revealed by in situ DRIFTS. Additionally, in situ DRIFTS was employed to verify that the degradation of toluene by Ce1Mn3Ox-AC/DE satisfied the Langmuir-Hinshelwood (L-H) mechanism and the Mars-Van Krevelen (MvK) mechanism. The possible reaction pathway was elucidated (toluene → benzyl alcohol → benzoic acid → maleic anhydride → CO2 + H2O). Furthermore, final products attributed to toluene oxidation were detected by in situ DRIFTS at 50 °C in the absence of oxygen, confirming that the catalyst possessed outstanding performance at low temperatures beyond mere adsorption.
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Affiliation(s)
- Xuelian Li
- National Engineering Research Center for Fine Petrochemical Intermediates, and State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China
| | - Rujie Chen
- Shandong Laboratory of Yantai Advanced Materials and Green Manufacturing, Yantai Zhongke Research Institute of Advanced Materials and Green Chemical Engineering, Yantai 264000, PR China
| | - Min Yang
- National Engineering Research Center for Fine Petrochemical Intermediates, and State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, PR China
| | - Yongfang Niu
- National Engineering Research Center for Fine Petrochemical Intermediates, and State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China
| | - Jing Li
- National Engineering Research Center for Fine Petrochemical Intermediates, and State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, PR China
| | - Dan Shao
- Shandong Laboratory of Yantai Advanced Materials and Green Manufacturing, Yantai Zhongke Research Institute of Advanced Materials and Green Chemical Engineering, Yantai 264000, PR China
| | - Xinmei Zheng
- National Engineering Research Center for Fine Petrochemical Intermediates, and State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, PR China
| | - Chuanwei Zhang
- National Engineering Research Center for Fine Petrochemical Intermediates, and State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, PR China
| | - Yanxing Qi
- National Engineering Research Center for Fine Petrochemical Intermediates, and State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, PR China; Shandong Laboratory of Yantai Advanced Materials and Green Manufacturing, Yantai Zhongke Research Institute of Advanced Materials and Green Chemical Engineering, Yantai 264000, PR China.
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3
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Wang F, Zheng Y, Wei X, Lan D, Zhu J, Chen Y, Wo Z, Wu T. Controlled synthesis of Fe 3O 4/MnO 2 (3 1 0)/ZIF-67 composite with enhanced synergetic effects for the highly selective and efficient adsorption of Cu (II) from simulated copperplating effluents. ENVIRONMENTAL RESEARCH 2023; 237:116940. [PMID: 37619624 DOI: 10.1016/j.envres.2023.116940] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2023] [Revised: 08/03/2023] [Accepted: 08/18/2023] [Indexed: 08/26/2023]
Abstract
This study designed a composite material with internal synergistic effects among multiple components to achieve highly selective adsorption of Cu (II). Through controlled synthesis, the Fe3O4/MnO2(3 1 0)/ZIF-67 composite was successfully fabricated, leading to significant improvement in adsorption selectivity, capacity, and adsorption rate. The experimental results showed that the composite is of outstanding selectivity in the adsorption of Cu (II), with a partition coefficient K of Cu (II) that was 2.2-5.3 times higher than that of other coexisting ions. Moreover, the composite exhibited a remarkable adsorption capacity of 1261.0 mg g-1 and a fast adsorption rate of 840.7 mg g-1 h-1 at 298 K. Additionally, its magnetic property facilitated easy separation from wastewater, thereby enhancing its potential for commercial applications. The synergetic effect mechanism was analyzed through characterizations and DFT calculations. Furthermore, the recyclability of the composite was investigated, which showed that after seven cycles, the adsorption efficiency remained at 85% of its initial efficiency. It can be concluded that Fe3O4/MnO2(3 1 0)/ZIF-67 has potential to address challenges posed by heavy metal pollution in copperplating effluents.
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Affiliation(s)
- Fan Wang
- New Materials Institute, University of Nottingham, Ningbo, 315100, China; Department of Chemical and Environmental Engineering, University of Nottingham Ningbo China, Ningbo, 315100, China
| | - Yueying Zheng
- New Materials Institute, University of Nottingham, Ningbo, 315100, China; Department of Chemical and Environmental Engineering, University of Nottingham Ningbo China, Ningbo, 315100, China
| | - Xinggang Wei
- SAILARK Digital Technology Co. Ltd, Shanghai, 200000, China
| | - Dawei Lan
- New Materials Institute, University of Nottingham, Ningbo, 315100, China; Department of Chemical and Environmental Engineering, University of Nottingham Ningbo China, Ningbo, 315100, China
| | - Jintao Zhu
- Department of Chemical and Environmental Engineering, University of Nottingham Ningbo China, Ningbo, 315100, China
| | - Yingjie Chen
- Department of Chemical and Environmental Engineering, University of Nottingham Ningbo China, Ningbo, 315100, China
| | - Ziquan Wo
- Department of Material Science and Engineering, Guangdong Technion-Israel Institute of Technology, Shantou City, 515000, China
| | - Tao Wu
- New Materials Institute, University of Nottingham, Ningbo, 315100, China; Department of Chemical and Environmental Engineering, University of Nottingham Ningbo China, Ningbo, 315100, China; Key Laboratory of Carbonaceous Wastes Processing and Process Intensification of Zhejiang Province, Ningbo, 315100, China; Zhejiang - Canada Joint Laboratory on Green Chemicals and Energy, China.
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4
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Promoting effect of Ce doping on catalytic performance and water resistance ability for toluene catalytic combustion over the cheap and efficient Mn8Ni2Ce O catalysts. MOLECULAR CATALYSIS 2023. [DOI: 10.1016/j.mcat.2023.113019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
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Gong P, He F, Xie J, Fang D. Catalytic removal of toluene using MnO 2-based catalysts: A review. CHEMOSPHERE 2023; 318:137938. [PMID: 36702414 DOI: 10.1016/j.chemosphere.2023.137938] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 01/20/2023] [Accepted: 01/21/2023] [Indexed: 06/18/2023]
Abstract
Volatile organic compounds (VOCs) have serious hazard to human health and ecological environment. Due to its low cost and high activity, the catalytic oxidation technology considered to be the most effective method to remove VOCs. Toluene is one of the typical VOCs, hence its catalytic elimination is crucial for the regulation of VOCs. Manganese dioxide (MnO2) has been extensively studied for its excellent redox performance and low-temperature operation conditions. In this review, we summarize the research progresses in the toluene catalytic oxidation of MnO2-based catalysts, which contain single MnO2, metal-doped MnO2 and supported MnO2 catalyst. In particular, we pay much attention on the relationship between the chemical properties and toluene oxidation performance over MnO2 catalyst, as well as the catalytic reaction mechanisms. Moreover, the effects of different crystal forms and morphologies on the catalytic toluene reaction were discussed. And the perspective on MnO2 catalysts for the catalytic oxidation of toluene has been proposed. We expect that the summary of these important findings can serve as an important reference for the catalytic treatment of VOCs.
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Affiliation(s)
- Pijun Gong
- School of Environment and Materials Engineering, Yantai University, Yantai 264005, PR China.
| | - Feng He
- School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, PR China
| | - Junlin Xie
- School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, PR China
| | - De Fang
- School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, PR China
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Wu J, Liu Y, Cao M, Zheng N, Ma H, Ye X, Yang N, Liu Z, Liao W, Sun L. Cancer-Responsive Multifunctional Nanoplatform Based on Peptide Self-Assembly for Highly Efficient Combined Cancer Therapy by Alleviating Hypoxia and Improving the Immunosuppressive Microenvironment. ACS APPLIED MATERIALS & INTERFACES 2023; 15:5667-5678. [PMID: 36651290 DOI: 10.1021/acsami.2c20388] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Hypoxia, as a main feature of the tumor microenvironment, has greatly limited the efficacy of photodynamic therapy (PDT), as well as its clinical application. Here, a multifunctional composite nanoplatform, the peptide/Ce6/MnO2 nanocomposite (RKCM), has been constructed to alleviate tumor hypoxia and increase the efficacy of PDT using rationally designed peptide fibrils to encapsulate chlorin e6 (Ce6) inside and to mineralize MnO2 nanoparticles on the surface. As a result, RKCM significantly improved the PDT efficacy by increasing reactive oxygen species (ROS) generation, decreasing tumor cell viability, and inhibiting tumor growth and metastasis. Besides, decreased HIF-1α expression and increased immune-activated cell infiltration were also observed in RKCM/laser treatment xenograft. Mechanically, (1) Ce6 can induce singlet oxygen (1O2) generation under laser irradiation to give photodynamic therapy (PDT); (2) MnO2 can react with H2O2 in situ to supply additional O2 to alleviate tumor hypoxia; and (3) the released Mn2+ ions can induce a Fenton-like reaction to generate •OH for chemical dynamic therapy (CDT). Moreover, RKCM/laser treatment also presented with an abscopal effect to block the occurrence of lung metastasis by remolding the pre-metastasis immune microenvironment. With these several aspects working together, the peptide/Ce6/MnO2 nanoplatform can achieve highly efficient tumor therapy. Such a strategy based on peptide self-assembly provides a promising way to rationally design a cancer-responsive multifunctional nanoplatform for highly efficient combined cancer therapy by alleviating hypoxia and improving the immune microenvironment.
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Affiliation(s)
- Jingjing Wu
- Department of Oncology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
- Department of Thoracic Medical Oncology, Cancer Hospital of the University of Chinese Academy of Sciences (Zhejiang Cancer Hospital), No. 1 East Banshan Road, Gongshu District, Hangzhou, Zhejiang 310022, China
| | - Yang Liu
- State Key Laboratory of Heavy Oil Processing and Centre for Bioengineering and Biotechnology, College of Chemical Engineering, China University of Petroleum (East China), 66 Changjiang West Road, Qingdao 266580, China
| | - Meiwen Cao
- State Key Laboratory of Heavy Oil Processing and Centre for Bioengineering and Biotechnology, College of Chemical Engineering, China University of Petroleum (East China), 66 Changjiang West Road, Qingdao 266580, China
| | - Nannan Zheng
- State Key Laboratory of Heavy Oil Processing and Centre for Bioengineering and Biotechnology, College of Chemical Engineering, China University of Petroleum (East China), 66 Changjiang West Road, Qingdao 266580, China
| | - Hongchao Ma
- State Key Laboratory of Heavy Oil Processing and Centre for Bioengineering and Biotechnology, College of Chemical Engineering, China University of Petroleum (East China), 66 Changjiang West Road, Qingdao 266580, China
| | - Xiandong Ye
- Department of Oncology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - Nanyan Yang
- Department of Oncology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - Zhihong Liu
- Department of Oncology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - Wangjun Liao
- Department of Oncology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - Li Sun
- Department of Oncology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
- Department of Oncology, Air Force Medical Center of PLA, Air Force Medical University, Beijing 100089, China
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7
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Zeng Z, Guan MJ, Chen H, Xu X, Zou MJ, Zhang MC, Du Y, Li L. Capture-bonding Super Assembly of Nanoscale Dispersed Bimetal on Uniform CeO 2 Nanorod for the Toluene Oxidation. Chem Asian J 2023; 18:e202200947. [PMID: 36377353 DOI: 10.1002/asia.202200947] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2022] [Revised: 10/26/2022] [Indexed: 11/16/2022]
Abstract
Elimination of VOCs by catalytic oxidation is an important technology. Here, a general synergistic capture-bonding superassembly strategy was proposed to obtain the nanoscale dispersed 5.8% PtFe3 -CeO2 catalyst, which showed a high toluene oxidation activity (T100 =226 °C), excellent catalytic stability (125 h, >99.5%) and a good water resistance ability (70 h, >99.5%). Through the detailed XPS analysis, oxygen cycle experiment, hydrogen reduction experiment, and in-situ DRIFT experiment, we could deduce that PtFe3 -CeO2 had two reaction pathways. The surface adsorbed oxygen resulting from PtFe3 nanoparticles played a dominant role, due to the fast cycling between the surface adsorbed oxygen and oxygen vacancy. In contrast, the lattice oxygen resulting from CeO2 nanorods played an important role due to the relationship between the toluene oxidation activity and the metal-oxygen bonding energy. Furthermore, DFT simulation verified Pt sites were the dominant reaction active sites during this reaction.
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Affiliation(s)
- Zheng Zeng
- School of Energy Science and Engineering, Central South University, Changsha, 410083, Hunan, P. R. China
| | - Ma Juan Guan
- School of Energy Science and Engineering, Central South University, Changsha, 410083, Hunan, P. R. China
| | - Hongyu Chen
- School of Energy Science and Engineering, Central South University, Changsha, 410083, Hunan, P. R. China
| | - Xiang Xu
- School of Energy Science and Engineering, Central South University, Changsha, 410083, Hunan, P. R. China
| | - Ma Jianwu Zou
- School of Energy Science and Engineering, Central South University, Changsha, 410083, Hunan, P. R. China
| | - Ma Chongjie Zhang
- School of Energy Science and Engineering, Central South University, Changsha, 410083, Hunan, P. R. China
| | - Yankun Du
- School of Energy Science and Engineering, Central South University, Changsha, 410083, Hunan, P. R. China
| | - Liqing Li
- School of Energy Science and Engineering, Central South University, Changsha, 410083, Hunan, P. R. China
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Li S, Men Y, Liu S, Wang J. Boosting the efficiencies of ethanol total combustion by Cs incorporation into rod-shaped α-MnO2 catalysts. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.129607] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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9
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Yang Y, Zhao Y, Zong Y, Wu R, Zhang M, Feng J, Wei T, Ren Y, Ma J. Activation of peroxymonosulfate by α-MnO 2 for Orange Ⅰ removal in water. ENVIRONMENTAL RESEARCH 2022; 210:112919. [PMID: 35157919 DOI: 10.1016/j.envres.2022.112919] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2021] [Revised: 02/04/2022] [Accepted: 02/06/2022] [Indexed: 06/14/2023]
Abstract
Developing high-efficiency catalysts for peroxymonosulfate (PMS)-based advanced oxidation processes is important for eliminating pollutants in water. Herein, α-MnO2 with major exposed {110} and {100} facets prepared via a hydrothermal method were used as catalysts to activate PMS for the degradation of Orange Ⅰ (OⅠ). α-MnO2-100, with more abundant surface hydroxyl groups and greater reductive ability, performed remarkably better than α-MnO2-110 for degrading OⅠ. OⅠ removal of 86.20% was obtained in the α-MnO2-100/PMS system. The apparent rate constant of OⅠ removal over α-MnO2-100 was 2.11 times higher than that of α-MnO2-110. The effects of PMS concentration, catalyst dosage, OⅠ concentration, initial pH, anions and humic acid (HA) on OⅠ degradation in the α-MnO2-100/PMS system were systematically investigated. Quenching experiments and electron paramagnetic resonance (EPR) demonstrated that SO4•-, •OH, O2•- and 1O2 were the reactive oxygen species (ROS) in the α-MnO2-100/PMS system. Moreover, the possible degradation pathway of OⅠ in the α-MnO2-100/PMS system was proposed. This work provides an ideal metal oxide catalyst for sewage remediation.
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Affiliation(s)
- Yusong Yang
- Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin, 150001, China
| | - Ying Zhao
- Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin, 150001, China
| | - Yuan Zong
- Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin, 150001, China
| | - Ruiqi Wu
- Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin, 150001, China
| | - Mingyi Zhang
- Key Laboratory for Photonic and Electronic Bandgap Materials, Ministry of Education, School of Physics and Electronic Engineering, Harbin Normal University, Harbin, 150025, China
| | - Jing Feng
- Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin, 150001, China
| | - Tong Wei
- Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin, 150001, China
| | - Yueming Ren
- Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin, 150001, China.
| | - Jun Ma
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150090, China.
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Liu M, Yang X, Tian Z, Wang H, Yin L, Chen J, Guan Q, Yang H, Zhang Q. Insights into the role of strontium in catalytic combustion of toluene over La 1-xSr xCoO 3 perovskite catalysts. Phys Chem Chem Phys 2022; 24:3686-3694. [PMID: 35080221 DOI: 10.1039/d1cp04224f] [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
A series of LaCoO3 perovskite catalysts substituted by Sr in the A site (La1-xSrxCoO3) were prepared via a facile sol-gel method. The catalytic activity of these perovskite catalysts for the deep oxidation of toluene was evaluated. It was found that Sr substitution significantly enhanced the redox properties, the concentration of oxygen vacancies, and surface Co3+ active species via an electron interaction between Sr and Co from the results of Raman spectroscopy, H2-TPR (temperature programmed reduction), O2-TPD (temperature programmed desorption) and XPS (X-ray photoelectron spectroscopy). Typically, La0.82Sr0.18CoO3 (L0.82S0.18C) exhibited a superior catalytic performance among these samples owing to its best reducibility and highest number of active species. Kinetic analysis further revealed a higher reaction rate (5.1 × 10-7 mol g-1·s-1 at 210 °C) and a lower apparent activation energy (69.1 kJ mol-1) for toluene oxidation on the L0.82S0.18C sample in comparison to those on the others. In situ DRIFTS (diffuse reflectance infrared Fourier transform spectroscopy) confirmed the easy desorption of immediate products from the surface of the L0.82S0.18C sample, which could be responsible for its remarkable performance. These results could provide an efficient strategy for promoting the toluene oxidation through finely tuning the reducibility and surface active phase of the catalysts.
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Affiliation(s)
- Mo Liu
- Faculty of Environment Science and Engineering, Kunming University of Science and Technology, Kunming, 650500, China.
| | - Xiaoli Yang
- Faculty of Environment Science and Engineering, Kunming University of Science and Technology, Kunming, 650500, China.
| | - Zimeng Tian
- Faculty of Environment Science and Engineering, Kunming University of Science and Technology, Kunming, 650500, China.
| | - Huimin Wang
- Faculty of Environment Science and Engineering, Kunming University of Science and Technology, Kunming, 650500, China.
| | - Liangtao Yin
- Faculty of Environment Science and Engineering, Kunming University of Science and Technology, Kunming, 650500, China.
| | - Jianjun Chen
- Faculty of Environment Science and Engineering, Kunming University of Science and Technology, Kunming, 650500, China.
| | - Qingqing Guan
- Faculty of Environment Science and Engineering, Kunming University of Science and Technology, Kunming, 650500, China.
| | - Hao Yang
- Faculty of Environment Science and Engineering, Kunming University of Science and Technology, Kunming, 650500, China.
| | - Qiulin Zhang
- Faculty of Environment Science and Engineering, Kunming University of Science and Technology, Kunming, 650500, China.
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11
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Song H, Xu L, Chen M, Cui Y, Wu CE, Qiu J, Xu L, Cheng G, Hu X. Recent progresses in the synthesis of MnO 2 nanowire and its application in environmental catalysis. RSC Adv 2021; 11:35494-35513. [PMID: 35493136 PMCID: PMC9043261 DOI: 10.1039/d1ra06497e] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2021] [Accepted: 10/27/2021] [Indexed: 12/27/2022] Open
Abstract
Nanostructured MnO2 with various morphologies exhibits excellent performance in environmental catalysis owing to its large specific surface area, low density, and adjustable chemical properties. The one-dimensional MnO2 nanowire has been proved to be the dominant morphology among various nanostructures, such as nanorods, nanofibers, nanoflowers, etc. The syntheses and applications of MnO2-based nanowires also have become a research hotspot in environmental catalytic materials over the last two decades. With the continuous deepening of the research, the control of morphology and crystal facet exposure in the synthesis of MnO2 nanowire materials have gradually matured, and the catalytic performance also has been greatly improved. Differences in the crystalline phase structure, preferably exposed crystal facets, and even the length of the MnO2 nanowires will evidently affect the final catalytic performances. Besides, the modifications by doping or loading will also significantly affect their catalytic performances. This review carefully summarizes the synthesis strategies of MnO2 nanowires developed in recent years as well as the influences of the phase structure, crystal facet, morphology, dopant, and loading amount on the catalytic performance. Besides, the cutting-edge applications of MnO2 nanowires in the field of environmental catalysis, such as CO oxidation, the removal of VOCs, denitrification, etc., have been also summarized. The application of MnO2 nanowire in environmental catalysis is still in the early exploratory stage. The gigantic gap between theoretical investigation and industrial application is still a great challenge. Compared with noble metal based traditional environmental catalytic materials, the lower cost of MnO2 has injected new momentum and promising potential into this research field.
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Affiliation(s)
- Huikang Song
- Collaborative Innovation Centre of the Atmospheric Environment and Equipment Technology, School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control Nanjing 210044 P. R. China
| | - Leilei Xu
- Collaborative Innovation Centre of the Atmospheric Environment and Equipment Technology, School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control Nanjing 210044 P. R. China
| | - Mindong Chen
- Collaborative Innovation Centre of the Atmospheric Environment and Equipment Technology, School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control Nanjing 210044 P. R. China
| | - Yan Cui
- Collaborative Innovation Centre of the Atmospheric Environment and Equipment Technology, School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control Nanjing 210044 P. R. China
| | - Cai-E Wu
- College of Light Industry and Food Engineering, Nanjing Forestry University Nanjing 210037 P. R. China
| | - Jian Qiu
- Jiangsu ShuangLiang Environmental Technology Co., Ltd Jiangyin 214400 P. R. China
| | - Liang Xu
- Jiangsu ShuangLiang Environmental Technology Co., Ltd Jiangyin 214400 P. R. China
| | - Ge Cheng
- Collaborative Innovation Centre of the Atmospheric Environment and Equipment Technology, School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control Nanjing 210044 P. R. China
| | - Xun Hu
- School of Material Science and Engineering, University of Jinan Jinan 250022 P. R. China
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