In order to improve the photocatalytic activities of titanium, nano-SnO2 can be used to wrap TiO2, and only when the TiO2 wrapped by more than 5% SnO2, the enhancement of photocatalytic activities is remarkable.

• 通过半导体复合实验发现：SnO_2包覆TiO_2对光催化活性的提高是可行的，SnO_2对光催化活性的提高在包覆量大于5%25比较明显。