Y_2O_3-Bi_2O_3复合材料的制备及光催化性能

PREPARATION AND PHOTOCATALYTIC PROPERTIES OF Y_2O_3-Bi_2O_3 COMPOSITE MATERIALS

以硝酸钇和硝酸铋为原料制备稀土掺杂的Y2O3-Bi2O3复合材料。通过扫描电子显微镜(SEM)、紫外可见漫反射(UV-Vis DRS)光谱对样品的形貌及光吸收性能进行了表征。并以亚甲基蓝和甲基橙为模拟化合物,进行了材料的光催化活性研究。实验结果表明,煅烧温度和材料组成比例对光催化性能有一定影响,煅烧温度为400℃,组成为n(Y):n(Bi)=1:10条件下制备的材料光催化效果最佳,当催化剂浓度为250 mg/L,光催化反应90 min时,10 mg/L亚甲基蓝和甲基橙溶液的脱色率都可以达到90%以上。

With yttrium nitrate and bismuth nitrate as raw material,Y2O3-Bi2O3 composite material is obtained by calcinations. By scanning electron microscope( SEM),UV-Vis diffuse reflection spectroscopy( UV-Vis DRS),the morphology and optical absorption properties of the samples have been characterized. And with methylene blue and methyl orange as the analog compounds,photocatalytic activity of the materials research. Experimental results show that the calcination temperature and the composition ratio of the material has a certain influence on photocatalytic performance,calcination temperature is 400 ℃,consisting of n( Y) ∶ n( Bi) = 1∶ 10,under the effect of the photocatalytic material prepared in the best conditions,when the catalyst concentration of 250 mg / L,the photocatalytic reaction time 90 min,10 mg / L methylene blue and methyl orange decolorization rate can reach 90%.