Tags

Type your tag names separated by a space and hit enter

Synergistically catalytic oxidation of toluene over Mn modified g-C3N4/ZSM-4 under vacuum UV irradiation.
J Hazard Mater. 2018 05 05; 349:91-100.JH

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 O3 by-product from VUV irradiation causes secondary pollution and needs to be overcome. In this study, a multi-functional photocatalyst of Mn/g-C3N4/ZSM-4 was thus developed by a one-pot hydrothermal method, and then combined with VUV irradiation to eliminate O3 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 ppm of O3 was residual. In contrast, toluene degradation was enhanced to 96% over the Mn/g-C3N4/ZSM-4 while residual O3 was decreased to 4 ppm. The enhanced performance was attributed to the synergistic PCO and OZCO, as the Mn modification can efficiently enhance the photocatalytic activity of g-C3N4 and trigger the catalytic ozonation simultaneously. The results of electron spin resonance (ESR) confirmed the generation of reactive species such as OH and O2- by VUV irradiation and then greatly enhanced after Mn/g-C3N4/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-C3N4/ZSM-4 cooperated well with VUV is promising for VOCs degradation.

Authors+Show Affiliations

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.School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, 510275, China.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.

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

29414756

Citation

Xia, Dehua, et al. "Synergistically Catalytic Oxidation of Toluene Over Mn Modified g-C3N4/ZSM-4 Under Vacuum UV Irradiation." Journal of Hazardous Materials, vol. 349, 2018, pp. 91-100.
Xia D, Xu W, Hu L, et al. Synergistically catalytic oxidation of toluene over Mn modified g-C3N4/ZSM-4 under vacuum UV irradiation. J Hazard Mater. 2018;349:91-100.
Xia, D., Xu, W., Hu, L., He, C., Leung, D. Y. C., Wang, W., & Wong, P. K. (2018). Synergistically catalytic oxidation of toluene over Mn modified g-C3N4/ZSM-4 under vacuum UV irradiation. Journal of Hazardous Materials, 349, 91-100. https://doi.org/10.1016/j.jhazmat.2018.01.048
Xia D, et al. Synergistically Catalytic Oxidation of Toluene Over Mn Modified g-C3N4/ZSM-4 Under Vacuum UV Irradiation. J Hazard Mater. 2018 05 5;349:91-100. PubMed PMID: 29414756.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Synergistically catalytic oxidation of toluene over Mn modified g-C3N4/ZSM-4 under vacuum UV irradiation. AU - Xia,Dehua, AU - Xu,Wenjun, AU - Hu,Lingling, AU - He,Chun, AU - Leung,Dennis Y C, AU - Wang,Wanjun, AU - Wong,Po Keung, Y1 - 2018/02/06/ PY - 2017/08/28/received PY - 2018/01/16/revised PY - 2018/01/22/accepted PY - 2018/2/8/pubmed PY - 2018/2/8/medline PY - 2018/2/8/entrez KW - Mn/g-C(3)N(4)/ZSM-4 KW - Multi-functional photocatalyst KW - O(3) Elimination KW - VOCs degradation KW - VUV irradiation SP - 91 EP - 100 JF - Journal of hazardous materials JO - J. Hazard. Mater. VL - 349 N2 - 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 O3 by-product from VUV irradiation causes secondary pollution and needs to be overcome. In this study, a multi-functional photocatalyst of Mn/g-C3N4/ZSM-4 was thus developed by a one-pot hydrothermal method, and then combined with VUV irradiation to eliminate O3 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 ppm of O3 was residual. In contrast, toluene degradation was enhanced to 96% over the Mn/g-C3N4/ZSM-4 while residual O3 was decreased to 4 ppm. The enhanced performance was attributed to the synergistic PCO and OZCO, as the Mn modification can efficiently enhance the photocatalytic activity of g-C3N4 and trigger the catalytic ozonation simultaneously. The results of electron spin resonance (ESR) confirmed the generation of reactive species such as OH and O2- by VUV irradiation and then greatly enhanced after Mn/g-C3N4/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-C3N4/ZSM-4 cooperated well with VUV is promising for VOCs degradation. SN - 1873-3336 UR - https://www.unboundmedicine.com/medline/citation/29414756/Synergistically_catalytic_oxidation_of_toluene_over_Mn_modified_g_C3N4/ZSM_4_under_vacuum_UV_irradiation_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0304-3894(18)30055-4 DB - PRIME DP - Unbound Medicine ER -
Try the Free App:
Prime PubMed app for iOS iPhone iPad
Prime PubMed app for Android
Prime PubMed is provided
free to individuals by:
Unbound Medicine.