Z-型MoO3-x/Zn0.76Co0.24S的制备及其光催化产氢研究OA

Semiconductor-based photocatalytic hydrogen evolution technology is one of the most prom-ising ways to cope with the energy crisis and realize carbon neutrality.In this study,an efficient and stable MoO3-x/Zn0.76Co0.24S heterojunction was fabricated for hydrogen evolution by coupling plasma semiconductor MoO3-x and ternary metal sulfide Zn0.76Co0.24S(ZCS)through a simple hydrothermal process.In detail,the photocatalytic hydrogen evolution rate of MoO3-x/ZCS reached 4.32 mmol/(g·h),and the hydrogen evolution rate was still up to 4.25 mmol/(g·h)at the sixth use at room tempera-ture,which was higher than that of common classical catalysts.The mechanism analysis revealed that the photogenerated carriers of MoO3-x/ZCS follow the Z-scheme transfer route.Under irradiation,the photogenerated electrons in the conduction band of MoO3-x combine with the photogenerated holes in the valence band of ZCS through electrostatic effect,leading to the photogenerated electrons of MoO3-x/ZCS accumulating in the conduction band of ZCS,corresponding to stronger reducing ability(-1.72 eV),thereby acting on the efficient photocatalytic hydrogen evolution.More importantly,the plasma semiconductor of MoO3-x could convert light energy into heat energy through localized surface plasmon resonance effect,facilitating the performance of MoO3-x/ZCS toward photocatalytic hydrogen evolution through photothermal coordination.This study shed light on the design of Z-scheme heterojunction photocatalyst for high efficiency photothermal catalysis.