沉淀-光还原法制备Ag@AgCl/TiO2及其光催化性能  

Preparation of Ag@AgCl/TiO2 by Precipitation-Photoreduction Method and Its Photocatalytic Performance

作　　者：杨航 于思嘉 白绎炆 刘公召[1] 徐舸[1] YANG Hang;YU Si-jia;BAI Yi-wen;LIU Gong-zhao;XU Ge(School of Science,Shenyang University of Technology,Liaoning Shenyang 110870,China)

机构地区：[1]沈阳工业大学理学院,辽宁沈阳110870

出　　处：《广州化工》2020年第11期50-53,78,共5页GuangZhou Chemical Industry

基　　金：辽宁省自然科学基金指导计划(20180550838);辽宁省“兴辽英才计划”项目(XLYC902056)。

摘　　要：首先采用沉淀法在TiO2表面上沉积AgCl制得AgCl/TiO2,然后在氙灯下照射90min将AgCl部分光还原成Ag0合成了Ag@AgCl/TiO2光催化剂。对样品进行紫外-可见光漫反射光谱(UV-Vis DRS)和光致发光光谱(PL)测试,结果显示Ag@AgCl/TiO2光催化剂的禁带宽度和光致发光强度明显降低,说明其具有较强的可见光吸收能力并且明显降低了光生电子-空穴的复合率。在可见光的照射下,Ag@AgCl/TiO2复合光催化剂在30min内对罗丹明B模拟污染物的降解率为99.5%。Firstly,AgCl/TiO2 was prepared by depositing AgCl on the surface of TiO2 by precipitation method,and then Ag@AgCl/TiO2 photocatalyst was synthesized by partially reducing AgCl to Ag 0 by irradiation with xenon lamp for 90 min.The samples were subjected to UV-Vis DRS and photoluminescence spectrum test(PL).The results show that the forbidden band width and photoluminescence intensity of Ag@AgCl/TiO2 photocatalyst are significantly reduced,indicating that it has a strong visible light absorption capacity and significantly reduces the photo-generated electron-hole recombination rate.Under visible light,the degradation rate of rhodamine B simulated pollutants by Ag@AgCl/TiO2 composite photocatalyst was 99.5%within 30min.

关 键 词：光还原 等离子体 罗丹明B 光催化活性 可见光 

分 类 号：O643.3[理学—物理化学]