CsPbBr3/Polyoxometalate Composites for Selective Photocatalytic Oxidation of Benzyl Alcohol

Yuanyuan Dong*, Yeqin Feng, Zheng Li, Hui Zhou, Hongjin Lv*, Guo Yu Yang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

33 Citations (Scopus)

Abstract

Selective oxidation of benzyl alcohols to the corresponding carbonyl compounds is of great importance for providing versatile intermediates for the synthesis of pharmaceuticals and fine chemicals. In this work, we constructed a CsPbBr3/[Ni4(H2O)2(PW9O34)2]10- (CsPbBr3/Ni4P2) composite by integrating the visible light-responsive ability of CsPbBr3 and the multielectron-transfer ability of polyoxometalates. The resulting CsPbBr3/Ni4P2 composite exhibited good photocatalytic activity toward the selective conversion of benzyl alcohol to benzaldehyde with ∼100% selectivity. Mechanistic studies revealed that the tetra-nickel-substituted polyoxotungstate, Ni4P2, played crucial roles in the separation/migration and utilization of photogenerated charge carries due to its well-matched energy level with that of CsPbBr3 and the distinctive electron/proton-transferring ability as a redox shuttle. Multiple scavenging experiments confirmed that the photogenerated electrons (e-), holes (h+), O2-, and 1O2 were key reactive species for efficient photocatalysis.

Original languageEnglish
Pages (from-to)14346-14355
Number of pages10
JournalACS Catalysis
Volume13
Issue number21
DOIs
Publication statusPublished - 3 Nov 2023

Keywords

  • halide perovskite
  • photocatalysis
  • polyoxometalates
  • redox shuttle
  • selective alcohol oxidation

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