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Efficient photocatalytic oxidation of gaseous toluene in a bubbling reactor of water.
Chemosphere. 2019 Oct; 233:754-761.C

Abstract

Conventional gas-solid photocatalytic oxidation (SPCO) of VOCs has drawbacks such as accumulation of intermediates and catalytic deactivation. In this study, gas-liquid photocatalytic oxidation (LPCO) was exploited to improve the catalytic activity and stability by continuously bubbling VOCs into water. Toluene and commercial TiO2 (P25) were chosen as the representative VOC pollutant and photocatalyst, respectively. Toluene removal efficiency in LPCO was about 6 times of that in conventional SPCO, and no intermediates were detected in the exhaust of LPCO probably due to its high degradation and mineralization rates. However, plentiful intermediates were identified by GC-MS and ITMS both in the gas outlet and on the surface of catalyst in SPCO, which may lead to photocatalytic deactivation. Moreover, LPCO exhibited superior catalytic activity towards typical soluble VOCs such as formaldehyde compared to SPCO. The soluble intermediates formed from toluene degradation can be easily removed by sustaining UV irradiation to avoid water pollution and the water after purification can be reused in LPCO. This study provides a novel gas-liquid photocatalytic oxidation to replace conventional gas-solid photocatalytic oxidation for the sake of better catalytic activity and fewer by-products.

Authors+Show Affiliations

School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, PR China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, China.School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, PR China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, China.School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, PR China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, China.School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, PR China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, China; Guangdong-Hong Kong Joint Research Center for Air Pollution Control, China. Electronic address: seabao8@gmail.com.School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, PR China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, China; Guangdong-Hong Kong Joint Research Center for Air Pollution Control, China.School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, PR China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, China; Guangdong-Hong Kong Joint Research Center for Air Pollution Control, China.School of Environment, Resources and Development, Asian Institute of Technology, Klongluang, Pathumthani 12120, Thailand.School of Environment, Resources and Development, Asian Institute of Technology, Klongluang, Pathumthani 12120, Thailand.School of Environment, Resources and Development, Asian Institute of Technology, Klongluang, Pathumthani 12120, Thailand.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

31200135

Citation

Liu, Biyuan, et al. "Efficient Photocatalytic Oxidation of Gaseous Toluene in a Bubbling Reactor of Water." Chemosphere, vol. 233, 2019, pp. 754-761.
Liu B, Zhan Y, Xie R, et al. Efficient photocatalytic oxidation of gaseous toluene in a bubbling reactor of water. Chemosphere. 2019;233:754-761.
Liu, B., Zhan, Y., Xie, R., Huang, H., Li, K., Zeng, Y., Shrestha, R. P., Kim Oanh, N. T., & Winijkul, E. (2019). Efficient photocatalytic oxidation of gaseous toluene in a bubbling reactor of water. Chemosphere, 233, 754-761. https://doi.org/10.1016/j.chemosphere.2019.06.002
Liu B, et al. Efficient Photocatalytic Oxidation of Gaseous Toluene in a Bubbling Reactor of Water. Chemosphere. 2019;233:754-761. PubMed PMID: 31200135.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Efficient photocatalytic oxidation of gaseous toluene in a bubbling reactor of water. AU - Liu,Biyuan, AU - Zhan,Yujie, AU - Xie,Ruijie, AU - Huang,Haibao, AU - Li,Kai, AU - Zeng,Yuxuan, AU - Shrestha,Rajendra P, AU - Kim Oanh,Nguyen Thi, AU - Winijkul,Ekbordin, Y1 - 2019/06/04/ PY - 2019/04/07/received PY - 2019/05/23/revised PY - 2019/06/02/accepted PY - 2019/6/15/pubmed PY - 2019/9/19/medline PY - 2019/6/15/entrez KW - Gas-liquid phase KW - Gaseous toluene KW - Photocatalytic oxidation KW - VOCs SP - 754 EP - 761 JF - Chemosphere JO - Chemosphere VL - 233 N2 - Conventional gas-solid photocatalytic oxidation (SPCO) of VOCs has drawbacks such as accumulation of intermediates and catalytic deactivation. In this study, gas-liquid photocatalytic oxidation (LPCO) was exploited to improve the catalytic activity and stability by continuously bubbling VOCs into water. Toluene and commercial TiO2 (P25) were chosen as the representative VOC pollutant and photocatalyst, respectively. Toluene removal efficiency in LPCO was about 6 times of that in conventional SPCO, and no intermediates were detected in the exhaust of LPCO probably due to its high degradation and mineralization rates. However, plentiful intermediates were identified by GC-MS and ITMS both in the gas outlet and on the surface of catalyst in SPCO, which may lead to photocatalytic deactivation. Moreover, LPCO exhibited superior catalytic activity towards typical soluble VOCs such as formaldehyde compared to SPCO. The soluble intermediates formed from toluene degradation can be easily removed by sustaining UV irradiation to avoid water pollution and the water after purification can be reused in LPCO. This study provides a novel gas-liquid photocatalytic oxidation to replace conventional gas-solid photocatalytic oxidation for the sake of better catalytic activity and fewer by-products. SN - 1879-1298 UR - https://www.unboundmedicine.com/medline/citation/31200135/Efficient_photocatalytic_oxidation_of_gaseous_toluene_in_a_bubbling_reactor_of_water_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0045-6535(19)31231-7 DB - PRIME DP - Unbound Medicine ER -