Construction of two-dimensional zinc indium sulfide/bismuth titanate nanoplate with S-scheme heterojunction for enhanced photocatalytic hydrogen evolution.

In this study, 2D/2D ZnIn 2 S 4 /Bi 4 Ti 3 O 12 nanoplate heterojunctions were synthesized to alter the Bi 4 Ti 3 O 12 morphology, modulate the bandgap of Bi 4 Ti 3 O 12 , and enhance the utilization of light. The hydrogen production rate of ZnIn 2 S 4 /Bi 4 Ti 3 O 12 nanoplate with the optimal ratio reaches 27.50 mmol/h g−1. [Display omitted] Improving the separation efficiency of photogenerated carriers plays an important role in photocatalysis. In this study, two-dimensional (2D)/2D zinc indium sulfide (ZnIn 2 S 4)/bismuth titanate (Bi 4 Ti 3 O 12) nanoplate heterojunctions were synthesized to alter the Bi 4 Ti 3 O 12 morphology, modulate the bandgap of Bi 4 Ti 3 O 12 , and enhance the utilization of light. Meanwhile, the construction of the S-scheme heterojunction establishes an internal electric field at the ZnIn 2 S 4 /Bi 4 Ti 3 O 12 heterojunctions interface and achieves the spatial separation of photogenerated charges. The hydrogen production rate of ZnIn 2 S 4 /Bi 4 Ti 3 O 12 nanoplate with the optimal ratio reaches 27.50 mmol h−1 g−1, which is 1.5 times higher than that of ZnIn 2 S 4 /Bi 4 Ti 3 O 12 nanoflower (18.28 mmol h−1 g−1) and 2.4 times higher than that of ZnIn 2 S 4 (11.69 mmol h−1 g−1). The apparent quantum efficiency of ZnIn 2 S 4 /Bi 4 Ti 3 O 12 nanoplate reached 57.9 % under a single wavelength of light at 370 nm. This work provides insights into the study of new materials for photocatalytic hydrogen production. [ABSTRACT FROM AUTHOR]