ZnWO_(4)/ZnO异质结的制备及其在石化废水处理中的应用  

Preparation of ZnWO_(4)/ZnO heterojunction and its application in petrochemical wastewater treatment

作　　者：孙树旺 张明星 解晓敏 SUN Shu-wang;ZHANG Ming-xing;XIE Xiao-min(Environmental Monitoring Center of Yishui County,Linyi 276400,China;Environmental Monitoring Center of Lanling County,Linyi 276000,China)

机构地区：[1]临沂市沂水县环境监控中心,山东临沂276400 [2]临沂市兰陵县环境监控中心,山东临沂276000

出　　处：《化学工程师》2025年第2期8-12,33,共6页Chemical Engineer

基　　金：山东省科技计划项目(2022C0204211131)。

摘　　要：采用水热法成功合成了ZnWO_(4)/ZnO异质结型光催化剂。通过XRD、Raman、SEM、BET、UV-Vis DRS、PL等技术对样品的结构及性质进行分析,以石化废水为目标污染物,考察其光催化降解活性。研究结果表明,ZnWO_(4)/ZnO异质结光催化剂能够显著提高光生载流子的分离效率,进而提高光催化活性。在光催化降解石化废水实验中,经过60min模拟太阳光照射后,其对石化废水的降解率达到98.25%,一级反应动力常数达到0.0691min^(-1),分别为ZnO和ZnWO_(4)样品反应速率常数的5.08倍和10.47倍,经过5次循环降解实验后,其对石化废水的降解率仍能达到88.48%。ZnWO_(4)/ZnO heterojunction photocatalyst was successfully synthesized through hydrothermal method.The structure and properties of the as-synthesized samples were analyzed by XRD,Raman,SEM,BET,UV Vis DRS,PL.Petrochemical wastewater was selected as target pollutant to evaluate its photocatalytic degradation activity.The research results exhibit that ZnWO_(4)/ZnO heterojunction photocatalysts can significantly improve the separation efficiency of photo-generated carriers,which can further enhance its photocatalytic activity.In the photocatalytic degradation experiment of petrochemical wastewater,after 60 minutes of simulated sunlight irradiation,the degradation rate of petrochemical wastewater reached 98.25%,and the first-order reaction kinetic constant reached 0.0691min-1,which was 5.08 times and 10.47 times higher than that of pure ZnO and ZnWO_(4)samples,respectively.After 5 cycles of degradation experiments,the degradation rate of petrochemical wastewater could still reach 88.48%.

关 键 词：ZnWO_(4)/ZnO 异质结 石化废水 降解率 

分 类 号：O643.36[理学—物理化学]