中文摘要：

采用水热法制备了Er2Sn2O7纳米颗粒，并用TEM、XRD、IR、Raman等技术对其进行了表征。结果表明：Er2Sn2O7纳米颗粒的粒径约为20nm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。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，并初步探索了甲基橙分子在该实验条件下的光催化降解机理。

英文摘要：

Er2Sn2O7 nanopartieles were prepared by hydrothermal method, and characterized by TEM, XRD, IR and Raman techniques. It showed that Er2Sn2O7 powder consisted of compact particles about 20nm in size and of irregular shape. The photoeatalytie activities were also evaluated by deeolorization of methyl orange under ultraviolet light. Results indicate that the photograduation rate of as-prepared Er2Sn2O7 nanopartieles is quite high. 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.