Citation: Houkui Xiang, Zhijian Wang, Jiazang Chen. Revealing the Role of Elementary Doping in Photocatalytic Phenol Mineralization[J]. Chinese Journal of Structural Chemistry, ;2022, 41(9): 220906. doi: 10.14102/j.cnki.0254-5861.2022-0097 shu

Revealing the Role of Elementary Doping in Photocatalytic Phenol Mineralization

Houkui Xiang ^{1, 2} ,
Zhijian Wang ¹ ,
Jiazang Chen ^{1, 2,,}

1.
State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China
2.
Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China

Corresponding author: Jiazang Chen, chenjiazang@sxicc.ac.cn
Received Date: 28 April 2022
Accepted Date: 7 May 2022
Available Online: 11 May 2022

Figures(7)

Photocatalytic mineralization of recalcitrant contaminants like phenol in wastewater requires abundant hydroxyl radicals (·OH) to initiate the reaction prior to the ring-opening. We here increase the free energy for adsorption of O^* species on TiO₂ surface and slightly downshift the band position by tin doping. This can simultaneously promote the generation and suppress the annihilation of ·OH. Besides, tin doping can also facilitate semiconductor-cocatalyst-solution (SCS) interfacial electron transfer by lowering the potential barrier and synergistically enhance the photon utilization. By filming the photocatalyst onto our developed fixed bed reactors, the loss of photons resulting from undesirable absorption by contaminants can be alleviated. By these virtues, trace amount of phenol in wastewater can be efficiently mineralized.
- hole extraction,
- interfacial electron transfer,
- hydroxyl radical,
- elementary doping,
- photocatalytic mineralization
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