基于含硫废水合成CdWO_(4)-CdS异质结及其光催化析氢研究  

Synthesis of CdWO_(4)-CdS heterojunction based on sulphide wastewater for photocatalytic H_(2)evolution

作　　者：张璐璐 张澜萌 岳晨昕 袁灿誉 傅强 李兴娟 颜廷江 ZHANG Lulu;ZHANG Lanmeng;YUE Chenxin;YUAN Canyu;FU Qiang;LI Xingjuan;YAN Tingjiang(School of Chemistry and Chemical Engineering,Qufu Normal University,273165,Qufu,Shandong,PRC)

机构地区：[1]曲阜师范大学化学与化工学院,山东省曲阜市273165

出　　处：《曲阜师范大学学报(自然科学版)》2025年第2期9-14,F0002,共7页Journal of Qufu Normal University(Natural Science)

基　　金：国家自然科学基金(22172086);山东省自然科学基金(ZR2021ZD06,ZR2021QB041).

摘　　要：该文通过离子交换法将含硫废水中的硫离子固化沉淀合成出一种新型的四方相CdWO_(4)-CdS异质结光催化剂,并将其用于光催化析氢反应.CdWO_(4)-CdS异质结光催化剂的析氢速率为1.642 mmol/(g·h),分别是CdS和CdWO_(4)样品的8.6倍和746倍.X射线光电子能谱和光沉积Au纳米颗粒实验显示,CdWO_(4)-CdS异质结光催化剂载流子传输路径属于典型的typeⅡ型,能够实现光生电子与空穴的有效空间分离.此外,CdWO_(4)与CdS之间形成的内置电场可以加速光生电荷的输运.因此,CdWO_(4)-CdS异质结光催化剂实现了硫化物氧化和水还原生成氢气.A novel type of in-situ synthesized tetragonal CdWO_(4)-CdS heterojunction photocatalyst was synthesized by facile precipitation ion exchange methods for the treatment of sulphide wastewater and hydrogen evolution.The impressive hydrogen evolution rate of the CdWO_(4)-CdS heterojunction photocatalyst is 1.642 mmol/(g·h),which is 8.6 and 746 times higher than that of the CdS and CdWO_(4)samples,respectively.A series of characterizations illustrates that the CdWO_(4)-CdS heterojunction photocatalyst is a typical type-Ⅱstructure,which is able to achieve the effective spatial separation of the photogenerated electron and hole.Besides,the built-in electric field formed between CdWO_(4)and CdS can accelerate the transport of the photogenerated charge.Eventually,the CdWO_(4)-CdS heterojunction photocatalyst achieves sulphide oxidation coupled with water reduction to hydrogen.

关 键 词：异质结光催化剂 离子交换 光催化析氢 含硫废水 

分 类 号：O613[理学—无机化学]