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Yang J, Zhao L, Zhou T, Ma S, Wang X. Catalytic Oxidation Activity of NO over Mullite-Supported Amorphous Manganese Oxide Catalyst. MATERIALS (BASEL, SWITZERLAND) 2023; 16:ma16103821. [PMID: 37241448 DOI: 10.3390/ma16103821] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2023] [Revised: 05/10/2023] [Accepted: 05/13/2023] [Indexed: 05/28/2023]
Abstract
Nitric oxide (NO) can pose a severe threat to human health and the environment. Many catalytic materials that contain noble metals can oxidize NO into NO2. Therefore, the development of a low-cost, earth-abundant, and high-performance catalytic material is essential for NO removal. In this study, mullite whiskers on a micro-scale spherical aggregate support were obtained from high-alumina coal fly ash using an acid-alkali combined extraction method. Microspherical aggregates and Mn(NO3)2 were used as the catalyst support and the precursor, respectively. A mullite-supported amorphous manganese oxide (MSAMO) catalyst was prepared by impregnation and calcination at low temperatures, in which amorphous MnOx is evenly dispersed on the surface and inside of aggregated microsphere support. The MSAMO catalyst, with a hierarchical porous structure, exhibits high catalytic performance for the oxidation of NO. The MSAMO catalyst, with a 5 wt% MnOx loading, presented satisfactory NO catalytic oxidation activity at 250 °C, with an NO conversion rate as high as 88%. Manganese exists in a mixed-valence state in amorphous MnOx, and Mn4+ provides the main active sites. The lattice oxygen and chemisorbed oxygen in amorphous MnOx participate in the catalytic oxidation of NO into NO2. This study provides insights into the effectiveness of catalytic NO removal in practical industrial coal-fired boiler flue gas. The development of high-performance MSAMO catalysts represents an important step towards the production of low-cost, earth-abundant, and easily synthesized catalytic oxidation materials.
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Affiliation(s)
- Jianlin Yang
- College of Materials Science and Engineering, Liaoning Technical University, Fuxin 123000, China
| | - Lu Zhao
- College of Materials Science and Engineering, Liaoning Technical University, Fuxin 123000, China
| | - Tianran Zhou
- School of Civil Engineering, Liaoning Technical University, Fuxin 123000, China
| | - Shuhua Ma
- CAS Key Laboratory for Green Processes and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
- Innovation Academy for Green Manufacture, Chinese Academy of Sciences, Beijing 100190, China
- National Engineering Research Center of Green Recycling for Strategic Metal Resources, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
| | - Xiaohui Wang
- CAS Key Laboratory for Green Processes and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
- Innovation Academy for Green Manufacture, Chinese Academy of Sciences, Beijing 100190, China
- National Engineering Research Center of Green Recycling for Strategic Metal Resources, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
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Mo M, Tang J, Zou L, Xun Y, Guan H. Improvement and regeneration of Co–B amorphous alloy nanowires for the selective hydrogenation of cinnamaldehyde. RSC Adv 2022; 12:33099-33107. [DOI: 10.1039/d2ra05595c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2022] [Accepted: 11/04/2022] [Indexed: 11/19/2022] Open
Abstract
Co–B amorphous alloy nanowires exhibited the improvement of catalytic hydrogenation activity and cycling life by plasma treatment.
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Affiliation(s)
- Min Mo
- School of Physics and Chemistry, Hunan First Normal University, Changsha 410205, China
| | - Jiansheng Tang
- School of Physics and Chemistry, Hunan First Normal University, Changsha 410205, China
| | - Lijun Zou
- School of Physics and Chemistry, Hunan First Normal University, Changsha 410205, China
| | - Youyi Xun
- School of Physics and Chemistry, Hunan First Normal University, Changsha 410205, China
| | - Hongru Guan
- School of Physics and Chemistry, Hunan First Normal University, Changsha 410205, China
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Hou H, Liu Z, Zhang J, Zhou J, Qian G. A review on fabricating functional materials by heavy metal-containing sludges. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:133-155. [PMID: 33063214 DOI: 10.1007/s11356-020-10990-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Accepted: 09/25/2020] [Indexed: 06/11/2023]
Abstract
With the development of industry, sustainable use of natural resources has become a worldwide hot topic. Heavy metal-containing sludge (HMS) is a hazardous waste after wastewater treatment. At present, HMS is still treated by landfill or landfill after incineration. Considering the components, HMS usually contains various heavy metals and organic compounds, which is potentially used as a raw resource for catalyst production. This review thus concludes recent reports and developments in this field. First, basic technologies are summarized as component regulation, precursor formation, and structure transformations. Second, prepared materials are applied in various catalytic fields, such as gas purification, photocatalysis, electrocatalysis, and Fenton catalysis. During these processes, key factors are multi-metallic components, metal doping, temperature, and pH. They not only influence the formation of HMS-derived catalyst but also the catalytic activity. Furthermore, catalytic activities of HMS-derived catalysts are compared with those synthesized by pure reagents. An assessment and accounting are also supplied if raw resources are substituted by HMS. Finally, in order to apply HMS in a real application, more works must be devoted to the influence of trace metal doping on catalytic activities and stabilities. Besides, more pilot experiments are urgently necessary.
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Affiliation(s)
- Hao Hou
- SHU Center of Green Urban Mining & Industry Ecology, School of Environmental and Chemical Engineering, Shanghai University, No. 381 Nanchen Road, Shanghai, 200444, People's Republic of China
| | - Zixing Liu
- SHU Center of Green Urban Mining & Industry Ecology, School of Environmental and Chemical Engineering, Shanghai University, No. 381 Nanchen Road, Shanghai, 200444, People's Republic of 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, People's Republic of China.
- MGI, Shanghai University, Xiapu Town, Xiangdong District, Pingxiang, 337022, Jiangxi, People's Republic of China.
| | - Jizhi Zhou
- School of Economics, Shanghai University, No. 333 Nanchen Road, Shanghai, 200444, People's Republic of 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, People's Republic of China.
- MGI, Shanghai University, Xiapu Town, Xiangdong District, Pingxiang, 337022, Jiangxi, People's Republic of China.
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