Hollow SnO2 nanospheres are prepared by hydrothermal method.Compared with solid SnO2 microspheres,the particularity of photocatalytic properties of hollow SnO2 nanospheres is studied.The N2adsorption-desorption tests show that hollow SnO2 nanospheres specific sur-face area is 102.7 m2/g,and solid SnO2 microspheres specific surface area is only 23.4 m2/g. Hollow SnO2 nanospheres can completely degrade 20 mg/L methyl orange solution at UV irra-diation time 90 minutes;under the same conditions,the residual rate of the traditional SnO2 solid microspheres is 41.3% after the degradation of methyl orange solution.The results show that the photocatalytic degradation performance of hollow SnO2 nanosphere is significantly im-proved compared with the traditional solid SnO2 microsphere,and the high specific surface area of hollow SnO2 nanospheres is the main reason for the improvement of photocatalytic perform-ance.%采用水热法制备空心SnO2纳米球,通过与传统实心SnO2微球光催化性能的对比,研究空心SnO2纳米球光催化性能的特殊性.由N2吸脱附测试得出,空心SnO2纳米球的比表面积为102.7 m2/g,而实心SnO2微球的比表面积只有23.4 m2/g.空心SnO2纳米球在紫外光照射时间90 min时可完全降解浓度20mg/L的甲基橙溶液,而传统实心SnO2微球在同样条件下降解甲基橙溶液后剩余率为41.3%.结果表明,相比传统实心SnO2微球,空心SnO2纳米球光催化降解性能明显提高,空心SnO2纳米球所具有的高比表面积是光催化性能提高的主要原因.
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