Abstract
Photocatalytic hydrogen production from water splitting is a technology that takes advantage of solar energy to produce clean and green hydrogen energy with wide application prospects. Herein, an S-scheme heterojunction photocatalyst with a nanosheets-on-nanosheets structure was successfully prepared by using a simple low-temperature water bath method and ZnIn 2 S 4 nanosheets are generated in situ on Bi 4 Ti 3 O 12 nanosheets, realizing efficient photocatalytic produce hydrogen under visible light irradiation. The optimal proportion of Bi 4 Ti 3 O 12 /ZnIn 2 S 4 (BTO/ZIS) has extraordinary hydrogen production efficiency of 19.8 mmol h -1 g -1 , 2.1 times that of pristine ZIS (9.2 mmol h -1 g -1 ). The main reasons for the improved activity of BTO/ZIS heterojunction photocatalysts are investigated by a series of photochemical characterization data analyses. Finally, its high photocatalytic performance can be attributed to more reactive active sites provided by the sheet-sheet heterostructure and the formation of S-scheme heterojunction between BTO and ZIS, which promotes the transfer of photogenerated electron-hole pairs. • 2D/2D Bi 4 Ti 3 O 12 /ZnIn 2 S 4 S-scheme heterojunction photocatalyst was prepared; • Bi 4 Ti 3 O 12 /ZnIn 2 S 4 exhibits the enhancement of visible light-response photocatalytic reduction reaction activity. • S-scheme interfacial charge transfer mechanism achieves spatial separation of carriers retaining strong redox capacity over Bi 4 Ti 3 O 12 /ZnIn 2 S 4 heterojunction.
Published Version
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