CdS-MoS2-WS2的微波法制备及其可见光分解水制氢性能  

Microwave Assisted Synthesis of CdS-MoS2-WS2 and Its Property of H2 Evolution from Water Splitting Reaction under Visible Light Irradiation

作　　者：刘爱丽 孙彬淑[2] 凌棚生 陈丽芸 蒋伟忠[1] LIU Aili;SUN Binshu;LING Pengsheng;CHEN Liyun;JIANG Weizhong(College of Materials Science and Engineering,Donghua University,Shanghai 201620,China;College of Chemistry and Materials Engineering,Wenzhou University,Wenzhou 325035,China)

机构地区：[1]东华大学材料科学与工程学院,上海201620 [2]温州大学化学与材料工程学院,浙江温州325035

出　　处：《东华大学学报（自然科学版）》2020年第3期376-382,共7页Journal of Donghua University(Natural Science)

基　　金：国家自然科学基金资助项目(21601138)。

摘　　要：采用微波辅助快速一步还原二硫代氨基甲酸盐混合物的方法,合成了尺寸均匀的CdS-MoS2-WS2纳米光催化剂。通过扫描电子显微镜(SEM)、高分辨率透射电镜(HRTEM)、X射线光电子能谱(XPS)、紫外-可见光吸收光谱(UV-Vis)等手段对样品进行表征,考察了材料的可见光分解水制氢性能。结果表明:负载了MoS2和WS2双助催化剂的CdS复合材料CdS-MoS2-WS2,其最佳产氢速率可达5.1mmol/(h·g),是纯CdS光催化产氢速率的63倍,且复合材料的产氢活性稳定持续60h;一步法微波快速合成方法使得MoS2和WS2两种助催化剂和CdS紧密地结合在一起,实现了电子-空穴对的快速分离,从而极大提升了光催化剂的制氢性能。CdS-MoS2-WS2 nano-photocatalyst was fabricated by microwave assisted rapid one-step reduction of dithiocarbamate mixture.The visible light decomposition of water to hydrogen of nanocomposites were characterized by scanning electron microscopy(SEM),high-resolution transmission electron microscopy(HRTEM),X-ray photoelectron spectroscopy(XPS)and ultraviolet-visible diffuse reflection spectroscopy(UV-Vis).The results show that CdS-MoS2-WS2 composites loaded with MoS2 and WS2 dual catalyst yield the highest hydrogen evolution rate of 5.1 mmol/(h·g)hydrogen production,which is nearly 63 times higher than that of pure CdS,and the hydrogen production activity can last over 60 h.The one-step microwave rapid synthesis method allows the two co-catalysts,MoS2 and WS2,to be tightly combined with CdS,which achieves the rapid separation of electron-hole pairs,thereby greatly improving the hydrogen production performance of the photocatalyst.

关 键 词：微波辅助 CdS 助催化剂 可见光分解水 制氢性能 

分 类 号：O643[理学—物理化学]