| Title: | Synergistically catalytic oxidation of toluene over Mn modified g-C(3)N(4)/ZSM-4 under vacuum UV irradiation |
| Author(s): | Xia D; Xu W; Hu L; He C; Leung DYC; Wang W; Wong PK; |
| Address: | "School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, 510275, China; School of Life Sciences, The Chinese University of Hong Kong, Hong Kong SAR, Shatin, NT, China; Department of Mechanical Engineering, The University of Hong Kong, Hong Kong SAR, Pokfulam Road, China. Electronic address: xiadehua3@mail.sysu.edu.cn. School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, 510275, China. Department of Mechanical Engineering, The University of Hong Kong, Hong Kong SAR, Pokfulam Road, China. Institute of Environmental Health and Pollution Control, School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, Guangdong, China. School of Life Sciences, The Chinese University of Hong Kong, Hong Kong SAR, Shatin, NT, China. Electronic address: pkwong@cuhk.edu.hk" |
| DOI: | 10.1016/j.jhazmat.2018.01.048 |
| ISSN/ISBN: | 1873-3336 (Electronic) 0304-3894 (Linking) |
| Abstract: | "The process of vacuum ultraviolet (VUV)-assisted photocatalytic oxidation (PCO) has attracted great interest for volatile organic compounds (VOCs) degradation owing to its strong oxidation capability. However, the O(3) by-product from VUV irradiation causes secondary pollution and needs to be overcome. In this study, a multi-functional photocatalyst of Mn/g-C(3)N(4)/ZSM-4 was thus developed by a one-pot hydrothermal method, and then combined with VUV irradiation to eliminate O(3) byproduct as well as enhance toluene degradation via ozone-assisted catalytic oxidation (OZCO). Under VUV irradiation alone, 64% of toluene degradation was occurred but 51?ª+ppm of O(3) was residual. In contrast, toluene degradation was enhanced to 96% over the Mn/g-C(3)N(4)/ZSM-4 while residual O(3) was decreased to 4?ª+ppm. The enhanced performance was attributed to the synergistic PCO and OZCO, as the Mn modification can efficiently enhance the photocatalytic activity of g-C(3)N(4) and trigger the catalytic ozonation simultaneously. The results of electron spin resonance (ESR) confirmed the generation of reactive species such as OH and O(2)(-) by VUV irradiation and then greatly enhanced after Mn/g-C(3)N(4)/ZSM-4 was added. Moreover, the possible mechanism of toluene degradation was also revealed through monitoring of reaction intermediate. Obviously, the process of Mn/g-C(3)N(4)/ZSM-4 cooperated well with VUV is promising for VOCs degradation" |
| Keywords: | Mn/g-C(3)N(4)/ZSM-4 Multi-functional photocatalyst O(3) Elimination VOCs degradation VUV irradiation; |
| Notes: | "PubMed-not-MEDLINEXia, Dehua Xu, Wenjun Hu, Lingling He, Chun Leung, Dennis Y C Wang, Wanjun Wong, Po Keung eng Research Support, Non-U.S. Gov't Netherlands 2018/02/08 J Hazard Mater. 2018 May 5; 349:91-100. doi: 10.1016/j.jhazmat.2018.01.048. Epub 2018 Feb 6" |
