SCI和EI收录∣中国化工学会会刊

中国化学工程学报 ›› 2024, Vol. 75 ›› Issue (11): 222-229.DOI: 10.1016/j.cjche.2024.06.022

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Mechanochemical synthesis of Ag/TiO2@PANI nanocomposites for enhanced toluene photocatalytic degradation under near-ultraviolet light

Qiulian Zhu1, Binghao Wang1, Ying Mo1, Shengfan Liao2, Yinfei Chen1, Hanfeng Lu1   

  1. 1. Innovation Team of Air Pollution Control, Institute of Catalytic Reaction Engineering, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, China;
    2. Department of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering, Key Laboratory for Chemical Biology of Fujian Province, Xiamen University, Xiamen 361005, China
  • 收稿日期:2024-04-14 修回日期:2024-06-11 接受日期:2024-06-13 出版日期:2024-11-28 发布日期:2024-08-22
  • 通讯作者: Hanfeng Lu,E-mail:luhf@zjut.edu.cn
  • 基金资助:
    This study was supported by the National Key Research and Development Program (2022YFC3702003), the Key Research and Development Projects in Zhejiang Province (2024C03114).

Mechanochemical synthesis of Ag/TiO2@PANI nanocomposites for enhanced toluene photocatalytic degradation under near-ultraviolet light

Qiulian Zhu1, Binghao Wang1, Ying Mo1, Shengfan Liao2, Yinfei Chen1, Hanfeng Lu1   

  1. 1. Innovation Team of Air Pollution Control, Institute of Catalytic Reaction Engineering, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, China;
    2. Department of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering, Key Laboratory for Chemical Biology of Fujian Province, Xiamen University, Xiamen 361005, China
  • Received:2024-04-14 Revised:2024-06-11 Accepted:2024-06-13 Online:2024-11-28 Published:2024-08-22
  • Contact: Hanfeng Lu,E-mail:luhf@zjut.edu.cn
  • Supported by:
    This study was supported by the National Key Research and Development Program (2022YFC3702003), the Key Research and Development Projects in Zhejiang Province (2024C03114).

摘要: Photocatalytic oxidation technology is a promising green technology for degrading volatile organic compounds (VOCs) due to its non-toxic, environmentally friendly, energy-saving and affordable characteristics. In this paper, Ag/TiO2@PANI-MC with high stability and activity was synthesized by the mechanochemical method. The designed Ag/TiO2@PANI-MC were of high specific surface area, light absorption capacity and low recombination rate of electron-hole pairs, which was demonstrated by various characterizations. When applied in photocatalytic toluene oxidation, the conversion is 17% at 20 ℃ under 100 W high-pressure mercury lamp. This photocatalytic performance is with less temperature sensitivity and significantly improved compared with Ag/TiO2 or TiO2 catalysts. Furthermore, the reaction routine was also confirmed by gas chromatography-mass spectrometry and toluene was mineralized to CO2. More importantly, the Ag/TiO2@PANI-MC indicated good reusability after three cycles, which was verified by the Fourier transform-infrared spectroscopy comparison with fresh and used catalysts. Our work proves a potential way of constructing nanocomposites based on mechanochemical synthesis for enhanced toluene photocatalytic degradation.

关键词: Toluene, Photocatalytic degradation, Mechanochemical synthesis, Nanocomposite

Abstract: Photocatalytic oxidation technology is a promising green technology for degrading volatile organic compounds (VOCs) due to its non-toxic, environmentally friendly, energy-saving and affordable characteristics. In this paper, Ag/TiO2@PANI-MC with high stability and activity was synthesized by the mechanochemical method. The designed Ag/TiO2@PANI-MC were of high specific surface area, light absorption capacity and low recombination rate of electron-hole pairs, which was demonstrated by various characterizations. When applied in photocatalytic toluene oxidation, the conversion is 17% at 20 ℃ under 100 W high-pressure mercury lamp. This photocatalytic performance is with less temperature sensitivity and significantly improved compared with Ag/TiO2 or TiO2 catalysts. Furthermore, the reaction routine was also confirmed by gas chromatography-mass spectrometry and toluene was mineralized to CO2. More importantly, the Ag/TiO2@PANI-MC indicated good reusability after three cycles, which was verified by the Fourier transform-infrared spectroscopy comparison with fresh and used catalysts. Our work proves a potential way of constructing nanocomposites based on mechanochemical synthesis for enhanced toluene photocatalytic degradation.

Key words: Toluene, Photocatalytic degradation, Mechanochemical synthesis, Nanocomposite