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纳米结构材料由于其独特的物理化学性能而备受人们关注[1~4].在催化、非线性光学器件、气敏元件和太阳能电池等领域具有广泛应用价值的纳米TiO_2是当前研究热点之一~[2,3].掺杂贵金属可以显著改善和提高TiO_2的性能~[5~7],如Au-TiO_2体系所表现出的良好催化性能~[7~9].文献报道
Nanostructured materials have drawn much attention because of their unique physicochemical properties [1 ~ 4] .Nano-TiO 2, which is widely used in catalysis, nonlinear optical devices, gas sensors and solar cells, is one of the hot topics ~ [2,3]. Doped precious metals can significantly improve and improve the performance of TiO 2 [5 ~ 7], such as the Au-TiO 2 system shows good catalytic performance ~ [7 ~ 9].