| Title: | Catalytic Ozonation of Polluter Benzene from -20 to >50 degrees C with High Conversion Efficiency and Selectivity on Mullite YMn(2)O(5) |
| Author(s): | Wan X; Shi K; Li H; Shen F; Gao S; Duan X; Zhang S; Zhao C; Yu M; Hao R; Li W; Wang G; Peressi M; Feng Y; Wang W; |
| Address: | "College of Electronic Information and Optical Engineering, Nankai University, Tianjin 300071, China. Physics Department, Ningbo University, Ningbo 315211, Zhejiang, China. School of Energy and Environment Science, Yunnan Normal University, Kunming 650500, Yunnan Province, China. State Environmental Protection Key Laboratory of Odor Pollution Control, Tianjin 300191, China. Department of Physics, University of Trieste, Trieste 34151, Italy. State Environmental Protection Key Laboratory of Urban Ambient Air Particulate Matter Pollution Prevention and Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China" |
| ISSN/ISBN: | 1520-5851 (Electronic) 0013-936X (Linking) |
| Abstract: | "Catalytic decomposition of aromatic polluters at room temperature represents a green route for air purification but is currently challenged by the difficulty of generating reactive oxygen species (ROS) on catalysts. Herein, we develop a mullite catalyst YMn(2)O(5) (YMO) with dual active sites of Mn(3+) and Mn(4+) and use ozone to produce a highly reactive O* upon YMO. Such a strong oxidant species on YMO shows complete removal of benzene from -20 to >50 degrees C with a high CO(x) selectivity (>90%) through the generated reactive species O* on the catalyst surface (60?ª+000 mL g(-1) h(-1)). Although the accumulation of water and intermediates gradually lowers the reaction rate after 8 h at 25 degrees C, a simple treatment by ozone purging or drying in the ambient environment regenerates the catalyst. Importantly, when the temperature increases to 50 degrees C, the catalytic performance remains 100% conversion without any degradation for 30 h. Experiments and theoretical calculations show that such a superior performance stems from the unique coordination environment, which ensures high generation of ROS and adsorption of aromatics. Mullite's catalytic ozonation degradation of total volatile organic compounds (TVOC) is applied in a home-developed air cleaner, resulting in high efficiency of benzene removal. This work provides insights into the design of catalysts to decompose highly stable organic polluters" |
| Keywords: | "Benzene/chemistry Reactive Oxygen Species Aluminum Silicates *Ozone Catalysis *Water Pollutants, Chemical/analysis benzene ozonation low-temperature TPD mullite oxide room-temperature catalysis;" |
| Notes: | "MedlineWan, Xiang Shi, Kai Li, Huan Shen, Fangxie Gao, Shan Duan, Xiangmei Zhang, Shen Zhao, Chunning Yu, Meng Hao, Ruiting Li, Weifang Wang, Gen Peressi, Maria Feng, Yinchang Wang, Weichao eng Research Support, Non-U.S. Gov't 2023/05/25 Environ Sci Technol. 2023 Jun 6; 57(22):8435-8445. doi: 10.1021/acs.est.3c01557. Epub 2023 May 24" |
