MAPbI3 microcrystals integrated with Ti3C2Tx MXene nanosheets for efficient visible-light photocatalytic H2 evolution

Abstract

Integrating Ti₃C₂T_x MXene nanosheets (Ti₃C₂T_x NSs) as an efficient cocatalyst with MAPbI₃ microcrystals results in superior MAPbI₃–Ti₃C₂T_x NS composite photocatalysts for H₂ evolution from MAPbI₃-saturated HI aqueous solution using visible light. The best MAPbI₃ (100 mg)–Ti₃C₂T_x NS (10 mg) composite exhibits a H₂ evolution rate of 63.6 μmol h⁻¹, which is 43 times higher than that of pristine MAPbI₃, and a stable H₂ evolution activity over a 120 h repeating reaction.