A Highly Efficient Bi2O2Se/Bi2WO6 S-Scheme Heterojunction Photocatalyst for Solar Water Splitting : A First-Principles Study

Two-dimensional (2D) S-scheme heterojunctions have garnered significant interest, owing to their remarkable redox capability and excellent potential in solar energy harvesting. In the work, a 2D/2D S-scheme heterojunction consisting of monolayer Bi2O2Se and Bi2WO6 was designed, and its performance i...

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Publié dans:Langmuir : the ACS journal of surfaces and colloids. - 1985. - 41(2025), 35 vom: 09. Sept., Seite 23761-23771
Auteur principal: Jian, Shengyong (Auteur)
Autres auteurs: Xiao, Qingquan, Huang, Jin, Ye, Jianfeng, Zhang, Liqin, Xu, Linjun, Xie, Quan
Format: Article en ligne
Langue:English
Publié: 2025
Accès à la collection:Langmuir : the ACS journal of surfaces and colloids
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520 |a Two-dimensional (2D) S-scheme heterojunctions have garnered significant interest, owing to their remarkable redox capability and excellent potential in solar energy harvesting. In the work, a 2D/2D S-scheme heterojunction consisting of monolayer Bi2O2Se and Bi2WO6 was designed, and its performance in photocatalytic water splitting was comprehensively investigated using first-principles calculations. The results reveal that the Bi2O2Se/Bi2WO6 heterojunction features well-aligned electronic band structures and generates an intrinsic built-in electric field directed from Bi2O2Se toward Bi2WO6. The internal electric field promotes effective charge separation via the S-scheme mechanism, significantly reducing carrier recombination and improving the dissociation of photogenerated electron-hole pairs. Furthermore, Gibbs free energy calculations indicate that solar energy can drive spontaneous water splitting of the Bi2O2Se/Bi2WO6 heterojunction. Owing to its efficient S-scheme charge migration and strong light-harvesting capability across a wide spectral range, the Bi2O2Se/Bi2WO6 heterojunction exhibits an impressive solar-to-hydrogen (STH) conversion efficiency that reaches 23.48%. These findings demonstrate that the Bi2O2Se/Bi2WO6 S-scheme heterojunction is a highly promising and stable photocatalyst for efficient solar-driven hydrogen production 
650 4 |a Journal Article 
700 1 |a Xiao, Qingquan  |e verfasserin  |4 aut 
700 1 |a Huang, Jin  |e verfasserin  |4 aut 
700 1 |a Ye, Jianfeng  |e verfasserin  |4 aut 
700 1 |a Zhang, Liqin  |e verfasserin  |4 aut 
700 1 |a Xu, Linjun  |e verfasserin  |4 aut 
700 1 |a Xie, Quan  |e verfasserin  |4 aut 
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