High catalytic activity for formaldehyde oxidation of an interconnected network structure composed of <i>δ</i>-MnO<sub>2</sub> nanosheets and <i>γ</i>-MnOOH nanowires

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High catalytic activity for formaldehyde oxidation of an interconnected network structure composed of δ-MnO₂ nanosheets and γ-MnOOH nanowires

Ying Tao , Rong Li , Ai-Bin Huang , Yi-Ning Ma , Shi-Dong Ji , Ping Jin , Hong-Jie Luo

Advances in Manufacturing ›› 2020, Vol. 8 ›› Issue (4) : 429 -439.

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Advances in Manufacturing ›› 2020, Vol. 8 ›› Issue (4) : 429 -439. DOI: 10.1007/s40436-020-00321-2

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High catalytic activity for formaldehyde oxidation of an interconnected network structure composed of δ-MnO₂ nanosheets and γ-MnOOH nanowires

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¹ State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 200050, Shanghai, People’s Republic of China

² Institute for the Conservation of Culture Heritage, Shanghai University, 200444, Shanghai, People’s Republic of China

³ University of Chinese Academy of Sciences, 100049, Beijing, People’s Republic of China

⁴ Department of Criminal Science and Technology, Jiangsu Police Institute, 210031, Nanjing, People’s Republic of China

^b lirong@mail.sic.ac.cn

^e sdki@mail.sic.ac.cn

Ying Tao is a master degree student at Shanghai University. She received the master degree in 2019. Her research primarily focuses on catalytic and energy-saving material.

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Rong Li is an Assistant Researcher at Shanghai Institute of Ceramics, Chinese Academy of Science. She received her maser degree from Shanghai Institute of Ceramics in 2013. She is mainly engaged in the research of nanotechnology and energy-saving materials.

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Ai-Bin Huang is an Assistant Researcher at Shanghai Institute of Ceramics, Chinese Academy of Science. He received his doctor’s degree from Shanghai Institute of Ceramics in 2017. He is mainly engaged in the research of chromatic materials for energy saving.

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Yi-Ning Ma is an associate professor at Jiangsu Police Institute. He received his doctor’s degree from Shanghai Institute of Ceramics in 2018. He is mainly engaged in the research of energy storage and latent fingerprint detection.

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Shi-Dong Ji is a professor at shanghai university. He received his doctor’s degree from Nagoya Institute of Technology in 2011. He is mainly engaged in the research of energy-saving materials.

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Ping Jin is the Director of Research Center for Industrial Ceramics, Shanghai Institute of Ceramics, Chinese Academy of Science. He received his doctor’s degree from Nagoya Institute of Technology in 1992. He is mainly engaged in the research of energy-saving materials.

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Hong-Jie Luo is a professor at shanghai university. He received his doctor’s degree from shanghai institute of ceramics in 1991. He was supported by China National Science Fund for Distinguished Young Scholars and the one-hundred-talent program of CAS. He is mainly engaged in the research of cultural relics conservation and energy-saving materials.

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Abstract

Among the transition metal oxide catalysts, manganese oxides have great potential for formaldehyde (HCHO) oxidation at ambient temperature because of their high activity, nontoxicity, low cost, and polybasic morphologies. In this work, a MnO₂-based catalyst (M-MnO₂) with an interconnected network structure was successfully synthesized by a one-step hydrothermal method. The M-MnO₂ catalyst was composed of the main catalytic agent, δ-MnO₂ nanosheets, dispersed in a nonactive framework material of γ-MnOOH nanowires. The catalytic activity of M-MnO₂ for HCHO oxidation at room temperature was much higher than that of the pure δ-MnO₂ nanosheets. This is attributed to the special interconnected network structure. The special interconnected network structure has high dispersion and specific surface area, which can provide more surface active oxygen species and higher surface hydroxyl groups to realize rapid decomposition of HCHO.

Keywords

MnO₂ / Formaldehyde / Catalytic oxidation / Hydrothermal synthesis

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Ying Tao, Rong Li, Ai-Bin Huang, Yi-Ning Ma, Shi-Dong Ji, Ping Jin, Hong-Jie Luo. High catalytic activity for formaldehyde oxidation of an interconnected network structure composed of δ-MnO₂ nanosheets and γ-MnOOH nanowires. Advances in Manufacturing, 2020, 8(4): 429-439 DOI:10.1007/s40436-020-00321-2

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