掺杂Sb对纳米TiO_2薄膜的超亲水性和微结构的影响(英文)

The Effect of Dopant Sb on the Superhydrophilicity and the Microstructure of the Nanoscale TiO_2 Thin Film

用溶胶-凝胶法将纳米TiO2:Sb薄膜沉积在玻璃基板上。研究了掺杂浓度对薄膜的光致超亲水性、薄膜结构和晶相转变的影响.结果表明,纯TiO2薄膜中,TiO2不仅以无定型态存在,而且还以板钛矿和锐钛矿的形式存在,掺杂Sb提高了TiO2由无定型向板钛矿和锐钛矿转变的速率,掺入适量的Sb后,TiO2薄膜表现出更好的光致超亲水性.时XRD谱可算出薄膜的晶粒大小为13.3～20.0nm.

TiO2: Sb nanoscale thin films were deposited on glass substrates by the sol-gel method. The influence of the dopant density on the photo-induced superhydrophilicity of the thin films was investigated and the influences on the structure and the phase transformation of the thin films were studied by X-ray diffraction (XRD) and Raman spectra. The results show that the pure TiO2 thin film composed of not only amorphous but also brookite and anatase. Dopant Sb enhances the crystallization rate of the TiO2 from amorphous to brookite and anatase phase. After doping proper amount of Sb, the thin films show more photo-induced superhydrophilicity, than the pure TiO2 thin film as well. The crystalline size of the TiO2: Sb thin films is about 13.3 similar to 20.0 nm calculated from the XRD patterns.