物理化学学报2026，Vol.42Issue(10)：50-63,14.DOI:10.1016/j.actphy.2025.100221
微小改变,显著差异:改良KSCN熔盐法一锅制备富Cd空位MoS2/CdS并实现光催化产氢性能提升
Small changes,big differences:modified KSCN molten salt method for one-pot synthesis of Cd vacancy-enriched MoS2/CdS and the enhanced photocatalytic H2 evolution performance
摘要
Abstract
Low-temperature KSCN molten salt method has been used for one-pot fabrication of decorated sulfide-based photocatalysts.However,the reaction system is actually short of S precursor,as it is determined by the decomposition of relatively stable KSCN,which may not be conducive to the production of high-performance catalysts.To this end,a modified KSCN flux route with a dosage of external S source was developed and used for the one-pot preparation of sulfide photocatalyst with 1%MoS2/CdS as the prototype.The results indicated that,compared with the sample(MC)prepared in conventional KSCN flux,a highly efficient sample enriched with seldom reported Cd vacancy(VCd,MC-S)could be readily fabricated under the S2−-rich environment.Furthermore,both the size of CdS and MoS2 could be substantially reduced from micrometer to nanometer scale as more nuclei could be introduced in the flux,which leads to a few-layer MoS2 that can be uniformly and tightly anchored on CdS with the average size of only~33 nm.Consequently,the resulting MC-S demonstrated an exceptional H2 evolution activity of 15.01 mmol h−1 g−1,a significant 6.5-fold improvement over its counterpart(MC)prepared through traditional KSCN molten salt method.The high activity can be mainly ascribed to the introduction of VCd and the close interface between small CdS and few-layer MoS2,which both benefit electron-hole separation.The preparation mechanism of the samples was tentatively compared and discussed from the difference in the nucleation and the development of crystals.We believe that this improved preparation method will also benefit the synthesis of other high-performance sulfide-based photocatalysts.关键词
Cd空位/MoS2/CdS/KSCN熔盐法/析氢/光催化Key words
Cd vacancy/MoS2/CdS/KSCN molten salt method/Hydrogen evolution/Photocatalysis分类
化学化工引用本文复制引用
范育歌,付先亮,朱丽,徐慢..微小改变,显著差异:改良KSCN熔盐法一锅制备富Cd空位MoS2/CdS并实现光催化产氢性能提升[J].物理化学学报,2026,42(10):50-63,14.基金项目
本研究得到武汉工程大学研究生教育创新基金项目(CX2024301)与国家自然科学基金项目(52302365)的资助 （CX2024301）
