紫外光辐射对TiO_2溶胶的影响研究

A Study of Influence on TiO_2 Sol with UV Irradiation

用紫外 -可见吸收光谱、动态光散射与透射电镜研究紫外光辐射对 Ti O2 溶胶的影响 ,结果表明 ,光辐射使 Ti O2 溶胶在可见光区的吸收减少 ,紫外区吸收增加 ,吸收带隙增大 .与非光辐射的 Ti O2 溶胶粒子相比 ,光辐射使 Ti O2 溶胶粒子分布均匀且平均粒径减小 ,提高了 Ti O2

Influence on TiO 2 sol irradiated with UV was studied by UV-Vis absorption spectra, dynamic laser light scattering(DLS) and TEM. The results show that absorbance of TiO 2 sol decreased in the visible region and increased in the near ultraviolet region, and the bandgap of TiO 2 sol increased during the process of UV irradiation. Comparison of TiO 2 sol without UV irradiation, average size of TiO 2 sol particles irradiated with UV decreased and its size distribution was more homogenous, and its crystallite was improved and anatase TiO 2 was formed at room temperature.