TiO_2／SnO_2复合氧化物的制备和光谱特性

Preparation and Spectral Characteristic of TiO_2/SnO_2 Composite Oxides

为了研究TiO2／SnO2复合氧化物的光学特性,用胶体化学方法制备了以SnO2为内核的TiO2／SnO2 复合氧化物,并且用紫外-可见光吸收光谱、X射线衍射和红外光谱对TiO2／SnO2复合氧化物的特性进行了 分析。结果显示:TiO2和TiO2／SnO2的能带宽度分别为4．13和3．86 eV,表现出量子尺寸效应;TiO2／SnO2 在紫外区域具有宽的强吸收带。X射线衍射中TiO2的(110)衍射峰的位置移动了1．6°,强度也发生了变化; 与TiO2红外光谱相比,TiO2／SnO2中Ti-O键的伸缩振动由500 cm-1移到了656 cm-1,并有560 cm-1的肩 峰,与吸附水相应的1 650 cm-1附近的吸收峰和3 420 cm-1的吸收峰均有所增加。

To study the spectral characteristic of TiO2/SnO2, TiO2/SnO2 composite oxide with SnO2 inside kernel was fabricated by colloid chemistry method, and was studied with UV-visible absorption spectrum, X-ray diffraction and infrared spectrum. The results showed that the bandgap widths of TiO2 and TiO2/SnO2 were 4.13 and 3.86 eV, respectively. TiO2/SnO2 had a widest and strong absorption band in the ultraviolet range. There was a quantum effect. In the X-ray diffraction, the station of TiO2 （110） diffraction peak moved 1.6°, and its intensity changed. Compared with TiO2 infrared spectrum, the Ti-O stretching vibration of TiO2/SnO2 moved from 500 to 656 cm^- 1, and had 560 cm^- 1 shoulder peak. The intensity of the peaks near 1 650 and 3 420 cm^- 1 corresponding to water absorbing peaks increased.