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TiO_2/g-C_3N_4 water absorption coupled photocatalytic degradation of isopropanol exhaust gas

Received Date:2023-06-30 Revised Date:2023-07-20 Publish Date:2023-12-02

DOI:10.20078/j.eep.20230708

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    Abstract:Isopropanol, as a typical volatile organic compound released into the atmosphere, can cause harm to the environment and ... Open+
    Abstract:

    Isopropanol, as a typical volatile organic compound released into the atmosphere, can cause harm to the environment and human health, and the coupling of aqueous phase absorption and photocatalysis is a useful technical approach for the treatment and degradation of isopropanol waste gas. In this study, TiO_2/g-C_3N_4 was used as a catalyst material to investigate its photocatalytic degradation performance of isopropanol in a gas-liquid-solid three-phase system. It was found that the photocatalytic degradation rate of isopropanol induced by visible light was significantly increased after the combination of TiO_2 and g-C_3N_4. The optimal degradation performance of 29.3% was achieved when 40%-TiO_2/g-C_3N_4 under visible light irradiation for 70 minutes, which was 4.24 times and 1.9 times higher than the photocatalytic performance of single TiO_2 and g-C_3N_4, respectively. In the continuous purification of isopropanol waste gas by the water absorption coupled photocatalyst degradation, the purification rate of isopropanol waste gas reached 61.7% after 180 minutes of visible light irradiation using 40%-TiO_2/g-C_3N_4, which was 10.6% higher than that of pure water. After five cycles of experiments, the purification rate remained above 60%, indicating good chemical stability.

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    Authors:

    • JIN Lili1
    • WANG Wenjie2
    • ZHOU Ying2
    • YU Jianming3
    • CHEN Jianmeng3
    • LU Hanfeng2,*

    Units

    • 1. CCTEG Hangzhou Research Institute Co., Ltd.
    • 2. College of Chemical Engineering, Zhejiang University of Technology
    • 3. College of Environment, Zhejiang University of Technology

    Keywords

    • VOCs purification
    • Water absorption coupled photocatalysis
    • TiO2
    • gC3N4
    • Isopropanol

    Citation

    JIN Lili, WANG Wenjie, ZHOU Ying, et al. TiO_2/g-C_3N_4 water absorption coupled photocatalytic degradation of isopropanol exhaust gas[J]. Energy Environmental Protection, 2023, 37(6): 147-155.

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