Issue 40, 2022

Engineering of Bi–S3 and sulfur-vacancy dual sites for efficient photocatalytic N-alkylation of amines

Abstract

Here, we report a ZnIn2S4-based photocatalyst that features dual active sites consisting of interfacial Bi–S3 bonds and sulfur-vacancies in ZnIn2S4 nanosheets (denoted as Bi–S3/S-Vs), which catalyze cascading oxidation and reduction to achieve alcohol-based N-alkylation of amines. Remarkably, the Bi–S3/S-Vs photocatalyst provides an excellent yield (94.5%) of N-benzylaniline in the model alkylation reaction of aniline and benzyl alcohol, which is greater than that of comparative samples. Charge carrier dynamics and theoretical evidence reveal that the enhanced photocatalytic performance of the Bi–S3/S-Vs photocatalyst originates from the unique coordination structure and electronic properties of Bi–S3 and sulfur vacancy (Vs) dual sites, which can act as the reduction and oxidation sites, respectively, to accomplish the cascade reaction for N-alkylation of amines by alcohols in one photocatalytic system. This study provides a new insight into designing high-efficiency photocatalysts with atomic precision.

Graphical abstract: Engineering of Bi–S3 and sulfur-vacancy dual sites for efficient photocatalytic N-alkylation of amines

Supplementary files

Article information

Article type
Paper
Submitted
03 Aug 2022
Accepted
10 Sep 2022
First published
11 Sep 2022

J. Mater. Chem. A, 2022,10, 21349-21355

Engineering of Bi–S3 and sulfur-vacancy dual sites for efficient photocatalytic N-alkylation of amines

G. Wang, Y. Liu, J. Zhang, Q. Chen, K. Fang and J. Mao, J. Mater. Chem. A, 2022, 10, 21349 DOI: 10.1039/D2TA06142B

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