J. Mater. Sci. Technol. ›› 2023, Vol. 138: 214-220.DOI: 10.1016/j.jmst.2022.08.009

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Constructing a Z-scheme Fe-MOF-based heterostructure for visible-light-driven oxidation of aromatic alcohol in ambient air

Lu Zhang, Jianhao Qiu*, Guanglu Xia, Dingliang Dai, Xiang Zhong, Jianfeng Yao*   

  1. Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, China
  • Received:2022-07-07 Revised:2022-08-08 Accepted:2022-08-12 Published:2023-03-01 Online:2023-03-03
  • Contact: * E-mail addresses:. jhq@njfu.edu.cn (J. Qiu), jfyao@njfu.edu.cn (J. Yao)

Abstract: Photocatalytic oxidation of aromatic alcohol into aromatic aldehyde using O2 has received huge attention, while the reaction that occurred in ambient air is rarely studied but follows the green-chemistry principles. Herein, spindle-shaped MIL-53(Fe)-NH2@ZnIn2S4 photocatalysts with a Z-scheme heterostructure were facilely developed for photocatalytic oxidation of aromatic alcohol in air under visible light. The benzyl alcohol conversion can be notably enhanced to 73% over the optimal MIL-53-NH2@ZnIn2S4 sample with a benzaldehyde production rate of 1825 μmol g-1 h-1. However, in the O2 atmosphere, the benzyl alcohol conversion is only 56%, indicating that O2 is not required and has an adverse effect on the reaction. The hierarchical structure and Z-scheme heterojunction of MIL-53-NH2@ZnIn2S4 impart an efficient separation and strong redox abilities of photo-induced electrons and holes, which are responsible for the impressive photocatalytic performance. This study could motivate the ingenious design of Z-scheme heterostructures for green organic conversion based on MOFs.

Key words: Photocatalysis, Metal-organic frameworks, Z-scheme heterostructure, Aromatic alcohol oxidation