Photocatalytic mineralization of low concentration phenol facilitated by transfer of positive and negative charges correlation

GAO Shugong; WEI Xuhui; LIU Haifeng; FANG Yao; JIA Kun; XIANG Houkui; CHEN Jiazang

doi:10.19906/j.cnki.JFCT.2023035

Volume 52 Issue 1

Jan. 2024

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Article Navigation > Journal of Fuel Chemistry and Technology > 2024 > 52(1): 87-96

GAO Shugong, WEI Xuhui, LIU Haifeng, FANG Yao, JIA Kun, XIANG Houkui, CHEN Jiazang. Photocatalytic mineralization of low concentration phenol facilitated by transfer of positive and negative charges correlation[J]. Journal of Fuel Chemistry and Technology, 2024, 52(1): 87-96. doi: 10.19906/j.cnki.JFCT.2023035

Citation:

GAO Shugong, WEI Xuhui, LIU Haifeng, FANG Yao, JIA Kun, XIANG Houkui, CHEN Jiazang. Photocatalytic mineralization of low concentration phenol facilitated by transfer of positive and negative charges correlation[J]. Journal of Fuel Chemistry and Technology, 2024, 52(1): 87-96. doi: 10.19906/j.cnki.JFCT.2023035

Citation:

GAO Shugong, WEI Xuhui, LIU Haifeng, FANG Yao, JIA Kun, XIANG Houkui, CHEN Jiazang. Photocatalytic mineralization of low concentration phenol facilitated by transfer of positive and negative charges correlation[J]. Journal of Fuel Chemistry and Technology, 2024, 52(1): 87-96. doi: 10.19906/j.cnki.JFCT.2023035

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Photocatalytic mineralization of low concentration phenol facilitated by transfer of positive and negative charges correlation

doi: 10.19906/j.cnki.JFCT.2023035

GAO Shugong^{1, 2
,},
WEI Xuhui^{1, 2
,},
LIU Haifeng^{1, 2
,},
FANG Yao^1
,,
JIA Kun^{1, 2
,},
XIANG Houkui^1
,,
CHEN Jiazang^{1, 2
,
,}

1.
State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China
2.
University of Chinese Academy of Sciences, Beijing 100049, China

Funds: The project was supported by the National Natural Science Foundation of China (22172185，21773285)

Received Date: 2023-04-14
Accepted Date: 2023-04-20
Rev Recd Date: 2023-04-20

Available Online: 2023-05-06

Publish Date: 2024-01-09

Abstract

Abstract

Photocatalytic mineralization of recalcitrant contaminants such as phenol requires hydroxyl radicals (·OH) for ring-opening reactions. Here, we weaken the adsorption of oxygen species on TiO₂ surface by Al doping, which can effectively promote the photoinduced ·OH generation. Besides, Al doping can downshift the conduction band of TiO₂. The resulted potential barrier lowering can promote semiconductor-cocatalyst interfacial electron transfer for the reduction half-reaction. Due to the strong correlation between positive and negative charges, the rapid transfer of electrons in the reduction half-reaction can also increase the concentration of holes in the semiconductor and promote the generation of ·OH. By immobilizing the photocatalyst on the light-incident inner wall of the reactor, it can avoid the competitive light absorption by the contaminant. By these virtues, efficient photocatalytic mineralization of low-concentration phenol in wastewater can be realized.
- phenol,
- photocatalytic,
- mineralization,
- interfacial electron transfer,
- TiO₂

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References(29)

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