| Title: | High-efficient capture and degradation of formaldehyde based on the electric-field-enhanced catalytic effect |
| Author(s): | Lu YG; Zhao WK; Fang C; Zheng JY; Sun BC; Zhang T; Han CB; |
| Address: | "The Key Laboratory of Advanced Functional Materials, Ministry of Education of China, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100124, People's Republic of China. School of Pharmacy, Xinxiang Medical University, Xinxiang, Henan 453003, People's Republic of China. The Key Laboratory of Advanced Functional Materials, Ministry of Education of China, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100124, People's Republic of China. Electronic address: cbhan@bjut.edu.cn" |
| DOI: | 10.1016/j.jhazmat.2023.131515 |
| ISSN/ISBN: | 1873-3336 (Electronic) 0304-3894 (Linking) |
| Abstract: | "Enhancing the generation of active groups is of great significance for alleviating the catalyst deactivation of formaldehyde (HCHO) by accelerating the decomposition of intermediate products. Herein, an electric-field-enhanced catalytic effect was proposed for the efficient capture and degradation of HCHO base on carbon cloth loaded manganese oxide catalyst (MnO(x)-CC). Under the action of electric field, MnO(x) can generate more hydroxyl radicals (*OH) and superoxide radicals (*O(2)(-)), thus accelerating the degradation of HCHO and intermediates at room temperature. After the introduction electric field ( approximately 1 x10(4) V/m), *O(2)(-) and *OH radical on the surface of MnO(x)-CC catalyst can be increased by 8 times and 23 times, respectively. At weight hourly space velocity of 300,000 mL/(g(cat) h) for approximately 15 ppm HCHO, MnO(x)-CC-Electric Field catalyst reached the removal efficiency of 99.4%, and the CO(2) conversion efficiency of 81.2%, without decrease significantly within 80 h. Theoretical calculation shows that the electric field can increase the electron state density of Mn atom at the Fermi level and reduce the adsorption energy of HCHO, O(2) and H(2)O, thus promoting the generation of active groups and degradation of intermediate products. The electric-field-enhancement catalytic effect provides a new approach for the degradation of Volatile Organic Compounds" |
| Keywords: | Active groups Catalytic oxidation Electric field Formaldehyde (HCHO) Manganese oxide (MnO(x)); |
| Notes: | "PubMed-not-MEDLINELu, Yuan Gang Zhao, Wen Kang Fang, De Cai Zheng, Jia Yu Sun, Bei Chen Zhang, Tao Han, Chang Bao eng Netherlands 2023/05/12 J Hazard Mater. 2023 Aug 5; 455:131515. doi: 10.1016/j.jhazmat.2023.131515. Epub 2023 Apr 27" |
