摘要
以钛酸四正丁酯为钛源,采用水热法制备Sm掺杂的纳米Sm-TiO2粉体.将ZnO引入到SmTiO2粉体中得到ZnO/Sm-TiO2粉体,研究不同焙烧温度、ZnO添加量对催化剂光催化性能的影响,确定最佳掺杂量及最佳焙烧温度;利用X射线衍射仪(XRD)、傅里叶变换红外光谱(FTIR)、扫描电镜(SEM)等测试手段对产物进行表征.结果表明:Sm-ZnO共掺杂能抑制TiO2由锐钛矿相向金红石相的转变,拓宽光催化剂的光谱响应范围,抑制了纳米晶体的生长;经掺杂后的TiO2纳米粉体的光催化性能有了明显的提高,在温度为400℃,Sm的掺杂质量百分比为0.2%,ZnO与TiO2的掺杂比为1∶8时所得样品的光催化效果最佳,甲基橙降解率可达96.34%.
Tetrabutyl titanate as titanium source, ZnO/Sm-TiO2 composite was synthesized via hydrothermal method, and different doping amount and calcine temperature influencing the performance of photocatalytic degradation of methyl orange discussed. The catalyst structure of the nanopowders was characterized by X-ray diffraction and FTIR. The experiment results show that Sm-ZnO doping can inhibit anatase TiO2 transfer to rutile, broadening spectral response and restraining crystal growth. When calcine temperature is 400℃, 0. 2% of Sm, ZnO： TiO2 at the doping ratio of 1 ： 8, the photodegradation of methyl orange increased to 96.34 % under 300 W UV-light.
出处
《厦门理工学院学报》
2015年第3期31-35,共5页
Journal of Xiamen University of Technology
基金
福建省教育厅科技项目(JA12314)
龙岩学院产学研项目(LC20140007)
福建省创新创业训练计划项目(S20141014)
关键词
纳米二氧化钛
光催化
共掺杂
水热法
nano TiO2
photodegradation
co-doping
hydrothermal method
