| Title: | Volatile organic compound removal by post plasma-catalysis over porous TiO(2) with enriched oxygen vacancies in a dielectric barrier discharge reactor |
| Author(s): | Wu W; Bu S; Bai L; Su Y; Song Y; Sun H; Zhen G; Dong K; Deng L; Yuan Q; Jing C; Sun Z; |
| Address: | "Engineering Research Center for Nanophotonics and Advanced Instrument, Ministry of Education, School of Physics and Electronic Science, East China Normal University, Shanghai 200241, China. ynsong@phy.ecnu.edu.cn. Collage of Marine Science and Technology, Zhejiang Ocean University, Zhoushan, 316022, China. School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200241, China. State Key Laboratory of Precision Spectroscopy, School of Physics and Electronic Science, East China Normal University, Shanghai 200241, China. Joint Institute of Advanced Science and Technology, East China Normal University, Shanghai 200241, China. Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, School of Ecological and Environmental Sciences, East China Normal University, Shanghai 200241, China. Life Science Major, Kyonggi University, Suwon, South Korea" |
| ISSN/ISBN: | 2040-3372 (Electronic) 2040-3364 (Linking) |
| Abstract: | "Non-thermal plasma (NTP) degradation of volatile organic compounds (VOCs) into CO(2) and H(2)O is a promising strategy for addressing ever-growing environment pollution. However, its practical implementation is hindered by low conversion efficiency and emissions of noxious by-products. Herein, an advanced low-oxygen-pressure calcination process is developed to fine-tune the oxygen vacancy concentration of MOF-derived TiO(2) nanocrystals. Vo-poor and Vo-rich TiO(2) catalysts were placed in the back of an NTP reactor to convert harmful ozone molecules into ROS that decompose VOCs via heterogeneous catalytic ozonation processes. The results indicate that Vo-TiO(2)-5/NTP with the highest Vo concentration exhibited superior catalytic activity in the degradation of toluene compared to NTP-only and TiO(2)/NTP, achieving a maximum 96% elimination efficiency and 76% CO(x) selectivity at an SIE of 540 J L(-1). Mechanistic analysis reveals that the (1)O(2), O(2)(-) and OH species derived from the activation of O(3) molecules on Vo sites contribute to the decomposition of toluene over the Vo-rich TiO(2) surface. With the aid of advanced characterization and density functional theory calculations, the roles of oxygen vacancies in manipulating the synergistic capability of post-NTP systems were explored, and were attributed to increased O(3) adsorption ability and enhanced charge transfer dynamics. This work presents novel insights into the design of high-efficiency NTP catalysts structured with active Vo sites" |
| Notes: | "PubMed-not-MEDLINEWu, Wenjie Bu, Saiyu Bai, Liang Su, Yuanting Song, Yenan Sun, Haitao Zhen, Guangyin Dong, Ke Deng, Lunhua Yuan, Qinghong Jing, Chengbin Sun, Zhuo eng England 2023/03/07 Nanoscale. 2023 Mar 23; 15(12):5909-5918. doi: 10.1039/d2nr04952j" |
