CdS纳米线的溶剂热合成及其光催化产氢性能

Solvothermal Synthesis of CdS Nanowires and Photocatalytic Hydrogen Evolution Activity

采用乙二胺溶剂热法制备了CdS纳米线(NWs),探究了乙二胺用量及晶化条件对CdS NWs的组成、结构、形貌、比表面积、光吸收性能、电化学性能和光解水产氢性能的影响.结果表明,优化条件下制得的CdS NWs长径比可达550、径向直径约50 nm且分散良好.在可见光驱动的光催化分解水产氢实验中,CdS NWs的产氢速率可达316μmol·g^(-1)·h^(-1),与不加乙二胺的硫化镉相比提高了3.0倍.在产氢循环实验中,反应进行到第4个循环时的产氢速率约为初始值的81%,具有良好的稳定性,这为一维CdS NWs在光催化分解水制氢中的进一步改性提供了基础.

CdS nanowires(NWs)were prepared by ethylenediamine solvothermal method,and the effects of ethylenediamine dosage and crystallization conditions on the composition,structure,morphology,specific surface area,photoabsorption performance,electrochemical performance and photocatalytic hydrogen evolution activity of CdS NWs were investigated.The results show that the CdS NWs prepared under the optimized conditions is well dispersed,with an aspect ratio of 550 and a radial diameter of about 50 nm.In the experiment of photocatalytic decomposition of hydrogen evolution from water driven by visible light,the hydrogen production rate of CdS NWs is 316μmol·g^(-1)·h^(-1),which is 3.0 times higher than that of cadmium sulfide without ethylenediamine.In the fourth hydrogen production cycle experiment,the hydrogen production rate of CdS NWs is about 81%of the initial value,showing good stability.This study provides a basis for further modification of one-dimensional CdS NWs in photocatalytic decomposition of water for hydrogen production.