Gd_2Sn_2O_7的水热合成及光催化活性研究

Hydrothermal Synthesis and Photocatalytic Activities Characterization of Gadolinium(Ⅲ) Stannate

采用水热法制备了Gd2Sn2O7纳米颗粒,并用TEM,XRD,IR,Raman等技术对其进行了表征。结果表明:Gd2Sn2O7纳米颗粒的粒径约为40 nm左右,且尺寸分布均匀。以紫外光为光源,甲基橙为目标降解物,研究了该纳米催化剂的光催化活性,结果显示其具有较高的催化效率(6 h可降解96%)。另外,对甲基橙催化降解后的产物进行了UV-Vis,IR,Fluorescence表征分析,并初步分析了甲基橙分子在该实验条件下的光催化降解机制。

Gd2Sn2O7 nanoparticles were prepared by hydrothermal method, and characterized by TEM, XRD, IR and Raman techniques. It showed that GdESn2O7 powder consisted of compact particles about 40 nm in size and of irregular shape. The photocatalytic activities were also evaluated by decolorization of methyl orange under ultraviolet light. Results indicated that the photogradation rate of as-prepared Gd2Sn2O7 nanoparticles was quite high （the photodeg- radation rate can be up to 96% in 6 h）. In addition, UV-vis, IR, fluorescence techniques were used to characterize the degradation species of methyl orange in this experiment, and the possible degradation mechanism was deduced from the spectral analysis.