| Synthesis of 8-MnO2 via ozonation routine for low temperature formaldehyde removal | |
| Fan, Guijun1,2,3; Guo YC(郭雅悰)4; Chai, Shaohua5; Zhang, Le1,2,3; Guan, Jian1,2,3; Ma, Guojun1,2; Han, Ning1,2,3; Chen, Yunfa1,2,3 | |
| Corresponding Author | Han, Ning([email protected]) ; Chen, Yunfa([email protected]) |
| Source Publication | JOURNAL OF ENVIRONMENTAL SCIENCES
 |
| 2025 | |
| Volume | 147Pages:642-651 |
| ISSN | 1001-0742 |
| Abstract | 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 |
| Keyword | 8-MnO 2 Ozone oxidation HCHO oxidation |
| DOI | 10.1016/j.jes.2023.04.021 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:001170207100001 |
| WOS Keyword | BIRNESSITE-TYPE MNO2 ; CATALYTIC-OXIDATION ; ROOM-TEMPERATURE ; MANGANESE-DIOXIDE ; DECOMPOSITION ; OZONE ; PERFORMANCE ; ALPHA-MNO2 ; BETA-MNO2 ; PT/TIO2 |
| WOS Research Area | Environmental Sciences & Ecology |
| WOS Subject | Environmental Sciences |
| Funding Project | National Key Research and Development Program of China[2016YFC0207100] |
| Funding Organization | National Key Research and Development Program of China |
| Classification | 二类/Q1 |
| Ranking | 2 |
| Contributor | Han, Ning ; Chen, Yunfa |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/94538 |
| Collection | 流固耦合系统力学重点实验室 |
| Affiliation | 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 |
| Recommended Citation 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.Rp_Au:Han, Ning, Chen, Yunfa |
| 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. |
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