Issue 48, 2023

First-principles study on the photocatalytic field of two-dimensional Janus BiSY (Y = I, Br, Cl) monolayers

Abstract

Two-dimensional photocatalytic materials have emerged as prominent materials within ecological and energy catalysis in recent years. Among these materials, two-dimensional Janus structures, including PdXY (X = S, Se; Y = Se, Te), MXY (M = Mo, W; X, Y = S, Se, Te), and MSiGeN4 (M = Mo, W), have been highlighted as prospective candidates for water-splitting photocatalysts. In this paper, we have explored BiSY (Y = I, Br, Cl) as a promising material for overall water-splitting, utilizing first-principles calculations to investigate the geometric structure, stability, electronic structure, and optical properties. By analyzing the results of phonon band structures, molecular dynamics simulations, and the elasticity coefficient, we can establish the system stability of BiSY (Y = I, Br, Cl). And HSE06 energy band calculations and band edge position calculations demonstrated that BiSY (Y = I, Br, Cl) possesses an appropriate band gap. Moreover, the absorption spectra and step reaction diagrams validated the feasibility of photocatalytic water-splitting of BiSY (Y = I, Br, Cl). Additionally, we confirmed that biaxial strain can change the band edge position of BiSY (Y = I, Br, Cl). Our comprehensive analysis shows that BiSY (Y = I, Br, Cl) is a potential candidate for efficient water-splitting photocatalysts. This study contributes to the growing collection of two-dimensional Janus photocatalysts.

Graphical abstract: First-principles study on the photocatalytic field of two-dimensional Janus BiSY (Y = I, Br, Cl) monolayers

Article information

Article type
Paper
Submitted
18 okt 2023
Accepted
05 noy 2023
First published
11 noy 2023

J. Mater. Chem. A, 2023,11, 26442-26451

First-principles study on the photocatalytic field of two-dimensional Janus BiSY (Y = I, Br, Cl) monolayers

Y. Ye, S. Sharshir, J. Wang, B. Zhang, C. Wang and Z. Yuan, J. Mater. Chem. A, 2023, 11, 26442 DOI: 10.1039/D3TA06337B

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