Статья

2D/1D CaIn2S4/TiO2 S-scheme heterojunction: In-situ hydrothermal synthesis and enhanced photocatalytic H2 evolution

Qi ZhouHubei Key Laboratory of Pollutant Analysis and Reuse Technology, College of Chemistry and Chemical Engineering, Hubei Normal University, Huangshi, 435002, Hubei, ChinaKaijia ZhangHubei Key Laboratory of Pollutant Analysis and Reuse Technology, College of Chemistry and Chemical Engineering, Hubei Normal University, Huangshi, 435002, Hubei, ChinaYaorong SuCollege of New Materials and New Energies, Shenzhen Technology University, Shenzhen, 518118, Guangdong, ChinaXinhe WuHubei Key Laboratory of Pollutant Analysis and Reuse Technology, College of Chemistry and Chemical Engineering, Hubei Normal University, Huangshi, 435002, Hubei, ChinaTengyuan GaoGuohong WangHubei Key Laboratory of Pollutant Analysis and Reuse Technology, College of Chemistry and Chemical Engineering, Hubei Normal University, Huangshi, 435002, Hubei, China

2024en

ABI

Аннотация

Constructing S-scheme heterojunction between TiO 2 and other reduction semiconductors can effectively enhance the intrinsically low carrier separation efficiency and increase the reduction ability of single TiO 2 photocatalyst. In this work, a hydrothermally synthesized 2D CaIn 2 S 4 nanosheets, possessing the merits of narrow bandgap and strong reduction ability, have been developed to construct S-scheme heterojunction with TiO 2 nanofiber. It is found that the 2D CaIn 2 S 4 nanosheets can be in-situ assembled onto the surface of 1D TiO 2 nanofiber to form a 2D/1D CaIn 2 S 4 /TiO 2 S-scheme heterojunction, which then presents an extremely reinforced H 2 -evolution rate (ca. 564.66 μmol·g –1 ·h –1 ), about 3- and 7-fold higher than that of the single TiO 2 and CaIn 2 S 4 , respectively. Finally, the in-situ XPS, DFT calculations, steady and transient-state spectrum results indicate that the formation of S-scheme heterojunctions between CaIn 2 S 4 and TiO 2 . This work may deliver a novel and insightful inspiration for the development of high-efficiency S-scheme heterojunction photocatalysts. • CaIn 2 S 4 /TiO 2 nanofiber heterojunction was prepared by a facile hydrothermal route. • In-situ XPS was investigated to elucidate the S-scheme heterojunction mechanism. • The CaIn 2 S 4 /TiO 2 nanofibers exhibited an excellent H 2 -evolution rate of ca. 564.66 μmol·g –1 ·h –1 .

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Идентификаторы

DOI: 10.1016/j.jmat.2024.100987

Цитирования и источники

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