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

doi:10.1016/j.jes.2023.04.021

IMECH-IR > 流固耦合系统力学重点实验室

	Synthesis of 8-MnO2 via ozonation routine for low temperature formaldehyde removal
	Fan, Guijun 1,2,3; Guo YC(郭雅悰)4; Chai, Shaohua 5; Zhang, Le 1,2,3; Guan, Jian 1,2,3; Ma, Guojun 1,2; Han, Ning 1,2,3; Chen, Yunfa 1,2,3
通讯作者	Han, Ning(nhan@ipe.ac.cn) ; Chen, Yunfa(chenyf@ipe.ac.cn)
发表期刊	JOURNAL OF ENVIRONMENTAL SCIENCES
	2025
卷号	147 页码:642-651
ISSN	1001-0742
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
关键词	8-MnO 2 Ozone oxidation HCHO oxidation
DOI	10.1016/j.jes.2023.04.021
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:001170207100001
关键词[WOS]	BIRNESSITE-TYPE MNO2 ; CATALYTIC-OXIDATION ; ROOM-TEMPERATURE ; MANGANESE-DIOXIDE ; DECOMPOSITION ; OZONE ; PERFORMANCE ; ALPHA-MNO2 ; BETA-MNO2 ; PT/TIO2
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Environmental Sciences
资助项目	National Key Research and Development Program of China[2016YFC0207100]
项目资助者	National Key Research and Development Program of China
论文分区	二类/Q1
力学所作者排名	2
RpAuthor	Han, Ning ; Chen, Yunfa
引用统计
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/94538
专题	流固耦合系统力学重点实验室
作者单位	1.Chinese Acad Sci, State Key Lab Multiphase Complex Syst, Inst Proc Engn, Beijing 100190, Peoples R China; 2.Univ Chinese Acad Sci, Coll Chem Engn, Beijing 100049, Peoples R China; 3.Chinese Acad Sci, Key Lab Sci & Technol Particle Mat, Inst Proc Engn, Beijing 361021, Peoples R China; 4.Chinese Acad Sci, Key Lab Mech Fluid Solid Coupling Syst, Inst Mech, Beijing 100190, Peoples R China; 5.Zhejiang Ocean Univ, Sch Petrochem Engn & Environm, Zhoushan 316022, Peoples R China
推荐引用方式 GB/T 7714	Fan, Guijun,Guo YC,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.,郭雅悰.,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.