摘要
The goal of photocatalytic CO_(2)reduction is to obtain a single energy-bearing product with high efficiency and stability.Consequently,constructing highly selective photocatalysts with enhanced surface and optoelectronic properties is crucial for achieving this objective.Here,we have developed a simple one-pot vulcanization method to synthesize a MIL-68(In)-derived Cd In_(2)S_(4)/In_(2)S_(3)heterojunction that exhibited stable and high selectivity.Multiple characterizations of the Cd In_(2)S_(4)/In_(2)S_(3)heterojunction revealed a hierarchical tubular structure with numerous surface reactive sites,a high visible-light utilization rate(λ<600 nm),efficient charge separation,and a prolonged charge-carrier lifetime.Moreover,an S-scheme charge transfer mechanism,based on the interleaved band between the two components,improved the reduction capability of the electrons.Benefiting from the compositional and structural synergy,the yield CO by Cd In_(2)S_(4)/In_(2)S_(3)-250(CI-250)reached 135.62μmol·g^(-1)·h^(-1),which was 49.32 times and 32.88 times higher than that of In_(2)S_(3)and Cd In_(2)S_(4),respectively.The Cd In_(2)S_(4)/In_(2)S_(3)heterojunction exhibited a quantum efficiency of 4.23%with a CO selectivity of 71%.Four cycle tests confirmed the good stability and recyclability of the CI-250.This work provides a new approach for designing and preparing high-performance hollow MOFsbased photocatalysts for scalable and sustainable CO_(2)reduction.
基金
financially supported by the Program for the Development of Science and Technology of Jilin Province(Nos.20240601047RC and YDZJ202201ZYTS629)
Hainan Province Science and Technology Special Fund(No.ZDYF2022SHFZ090)
the National Natural Science Foundation(Nos.22466017 and 22061014)
the specific research fund of the Innovation Platform for Academicians of Hainan Province。
