Er^(3+)∶YAlO_3/Fe掺杂TiO_2复合物的制备及光催化活性研究

Preparation of Er^(3+)∶YAlO_3/Fe-doped TiO_2 and Its Application in Photocatalytic Degradation of Dyes under Solar Light Irradiation

对TiO2半导体材料进行改性,分别通过溶胶凝胶、超声波分散和溶液沸腾的方法合成了Er3+∶YAlO3/Fe掺杂TiO2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的包覆量、Er3+∶YAlO3/Fe掺杂TiO2的量、太阳光照射时间、酸性红B的初始浓度和氯化钠浓度等其降解过程用UV-Vis光谱进行检测。实验结果表明,加入上转光剂之后降解率大幅度增加,改性后的光催化剂可以有效地降解染料废水。

In this work,Er3＋YAlO3/Fe-doped TiO2 composite,a novel photocatalyst,was synthesized by ultrasonic dispersion and liquid boiling method and characterized by X-ray diffraction（XRD） and scanning electron microscope（SEM）,the photocatalytic activity of Er3＋YAlO3/Fe-doped TiO2 composite was evaluated through the degradation of acid red B dye under solar light irradiation.The effects of Er3＋YAlO3 content,solar light irradiation time,dye initial concentration and Er3＋YAlO3/Fe-doped TiO2 amount as well as organic dyes on the photocatalytic degradation were also investigated.The experimental results indicated that the Er3＋YAlO3/Fe-doped TiO2 composite can effectively utilize solar energy to degrade acid red B dye and its photocatalytic activity was higher than that of Fe-doped TiO2 under the same condition.