Er^(3+):YAlO_3/Fe或Co掺杂ZnO包覆物的制备及光催化活性研究  

Photocatalytic Degradation of Organic Dyes under Solar Light Irradiation Combined with Er^(3+):YAlO_3/Fe-or Co-doped ZnO Doped Composites

作　　者：郭玉玮[1] 丁永萍[1] 聂鲁[1] 刘兴旺[1] 

机构地区：[1]包头师范学院化学学院,内蒙古包头014030

出　　处：《中国稀土学报》2012年第5期563-569,共7页Journal of the Chinese Society of Rare Earths

基　　金：包头科技局项目(2007G1013);内蒙古自治区教育厅高校科研项目(NJ06002;NJcxyO8124)资助

摘　　要：主要对ZnO半导体材料进行改性,分别通过溶胶凝胶、超声分散和溶液沸腾的方法合成了Er3+:YAlO3/Fe或Co掺杂ZnO复合物光催化剂,并且采用XRD和SEM进行表征,研究了各种因素在太阳光照射下降解酸性红B的催化活性,也考察了Er3+:YAlO3包覆量、Er3+:YA-lO3/Fe或Co掺杂ZnO、太阳光照射时间、处理温度和处理时间对降解率的影响,并通过HPLC进一步验证偶氮品红的降解程度。实验结果表明,加入上转换发光剂(Er3+:YAlO3占催化剂总量25%最好)之后降解率大幅度增加,改性后的光催化剂能有效地降解染料废水。In order to extend the photocatalytic per- formance of ZnO, the new photocatalysts of Er3＋： YAlO3/Fe- or Co-doped ZnO composites were prepared by the sol-gel process and characterized by XRD and TG-DTA. And their photocatalytic activities through the degradation of azo fuchsine under solar light irradi- ation were evaluated by HPLC. The influencing factors such as the Er3 ＋： YAlO3 content, Er3＋： YAlO3/Fe- or Co-doped ZnO, heat-treated temperature and heat-treated time were reviewed. The solar light irradiation time and photocatalyst addition amount on the photo- catalytic degradation of azo fuchsine were also studied. All experimental results indicated that the upconver- sion luminescence agent （It is the best that Er3＋： YAlO3 accounted 25 % for the catalyst amount） could sig- nificantly improve the degradation rate. After the mod- ification of photocatalyst, it could effectively degrade the dye wastewater under the solar light irradiation.

关 键 词：Er3+:YAlO3 复合物 上转换发光剂 太阳光 光催化 稀土 

分 类 号：O643.32[理学—物理化学]