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

doi:10.1016/j.cjche.2024.06.022

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

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. 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. 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/Abstract

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

Qiulian Zhu, Binghao Wang, Ying Mo, Shengfan Liao, Yinfei Chen, Hanfeng Lu. Mechanochemical synthesis of Ag/TiO₂@PANI nanocomposites for enhanced toluene photocatalytic degradation under near-ultraviolet light[J]. 中国化学工程学报, 2024, 75(11): 222-229.

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

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

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