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采用水热法制备了Sr2Ta2O7纳米片,并通过XRD、UV-Vis、SEM和TEM等手段对其进行了表征。以降解甲基橙溶液为反应模型,研究了Sr2Ta2O7纳米片的光催化性能。光催化结果表明,水热法制备的Sr2Ta2O7纳米片具有更高的光催化降解效率,为固相法制备的块体Sr2Ta2O7样品的2倍。二者催化性能上差异主要是由于两种方法制备的样品具有不同的晶粒大小和比表面积造成的。
Sr2Ta2O7 nanosheets were prepared by hydrothermal method and characterized by XRD, UV-Vis, SEM and TEM. The photocatalytic performance of Sr2Ta2O7 nanosheets was studied by using methyl orange solution as a reaction model. The photocatalytic results showed that Sr2Ta2O7 nanosheets prepared by hydrothermal method had higher photocatalytic degradation efficiency, which was twice as high as that of the bulk Sr2Ta2O7 samples prepared by solid-state method. The difference in catalytic performance between the two is mainly due to the different grain size and specific surface area of the samples prepared by the two methods.