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Synthesis of 8-MnO2 via ozonation routine for low temperature formaldehyde removal

文献类型：期刊论文

作者Fan, Guijun3,4,5; Guo, Yacong2; Chai, Shaohua1; Zhang, Le3,4,5; Guan, Jian3,4,5; Ma, Guojun4,5; Han, Ning3,4,5; Chen, Yunfa3,4,5
刊名JOURNAL OF ENVIRONMENTAL SCIENCES
出版日期2025
卷号147页码:642-651
ISSN号1001-0742
关键词8-MnO 2 Ozone oxidation HCHO oxidation
DOI10.1016/j.jes.2023.04.021
通讯作者Han, Ning(nhan@ipe.ac.cn) ; Chen, Yunfa(chenyf@ipe.ac.cn)
英文摘要Nowadays, it is still a challenge to prepared high efficiency and low cost formaldehyde (HCHO) removal catalysts in order to tackle the long-living indoor air pollution. Herein, 8MnO2 is successfully synthesized by a facile ozonation strategy, where Mn2 + is oxidized by ozone (O3 ) bubble in an alkaline solution. It presents one of the best catalytic properties with a low 100% conversion temperature of 85 degrees C for 50 ppm of HCHO under a GHSV of 48,000 mL/(g center dot hr). As a comparison, more than 6 times far longer oxidation time is needed if O3 is replaced by O2 . Characterizations show that ozonation process generates a different intermediate of tetragonal fi-HMnO2 , which would favor the quick transformation into the final product 8-MnO2 , as compared with the relatively more thermodynamically stable monoclinic y-HMnO2 in the O2 process. Finally, HCHO is found to be decomposed into CO2 via formate, dioxymethylene and carbonate species as identified by room temperature insitu diffuse reflectance infrared fourier transform spectroscopy. All these results show great potency of this facile ozonation routine for the highly active 8-MnO2 synthesis in order to remove the HCHO contamination. (c) 2024 The Research Center for Eco-Environmental Sciences, Chinese Academy of
WOS关键词BIRNESSITE-TYPE MNO2 ; CATALYTIC-OXIDATION ; ROOM-TEMPERATURE ; MANGANESE-DIOXIDE ; DECOMPOSITION ; OZONE ; PERFORMANCE ; ALPHA-MNO2 ; BETA-MNO2 ; PT/TIO2
资助项目National Key Research and Development Program of China[2016YFC0207100]
WOS研究方向Environmental Sciences & Ecology
语种英语
WOS记录号WOS:001170207100001
资助机构National Key Research and Development Program of China
源URL[http://dspace.imech.ac.cn/handle/311007/94537]  
专题力学研究所_流固耦合系统力学重点实验室(2012-)
通讯作者Han, Ning; Chen, Yunfa
作者单位1.Zhejiang Ocean Univ, Sch Petrochem Engn & Environm, Zhoushan 316022, Peoples R China
2.Chinese Acad Sci, Key Lab Mech Fluid Solid Coupling Syst, Inst Mech, Beijing 100190, Peoples R China
3.Chinese Acad Sci, Key Lab Sci & Technol Particle Mat, Inst Proc Engn, Beijing 361021, Peoples R China
4.Univ Chinese Acad Sci, Coll Chem Engn, Beijing 100049, Peoples R China
5.Chinese Acad Sci, State Key Lab Multiphase Complex Syst, Inst Proc Engn, Beijing 100190, Peoples R China
推荐引用方式
GB/T 7714		 Fan, Guijun,Guo, Yacong,Chai, Shaohua,et al. Synthesis of 8-MnO2 via ozonation routine for low temperature formaldehyde removal[J]. JOURNAL OF ENVIRONMENTAL SCIENCES,2025,147:642-651.
APA Fan, Guijun.,Guo, Yacong.,Chai, Shaohua.,Zhang, Le.,Guan, Jian.,...&Chen, Yunfa.(2025).Synthesis of 8-MnO2 via ozonation routine for low temperature formaldehyde removal.JOURNAL OF ENVIRONMENTAL SCIENCES,147,642-651.
MLA Fan, Guijun,et al."Synthesis of 8-MnO2 via ozonation routine for low temperature formaldehyde removal".JOURNAL OF ENVIRONMENTAL SCIENCES 147(2025):642-651.

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来源：力学研究所

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