Ye Zhao, Zhang Han-hui, Pan Hai-bo, Pan Hong-qing
College of Chemistry and Chemical Engineering, Fuzhou University, Fuzhou 350002, China.
Guang Pu Xue Yu Guang Pu Fen Xi. 2002 Dec;22(6):928-31.
Nano-sized TiO2 photocatalysts were prepared by drying the ethanol gel of titanium tetrabutoxide through natural state, supercritical ethanol, supercritical carbon dioxide drying methods and characterized by XRD, FTIR spectroscopy, FT-Raman spectroscopy and fluorescent spectroscopy, respectively. We regard degradation of rhodamine B by photocatalyst as a model reaction, and compare photocatalytic activities of samples obtained. The experimental results show that different drying methods have strong effect on crystal structure, energy band structure, optical adsorption property, surface quality and photocatalytic activity, TiO2 photocatalyst prepared by supercritical carbon dioxide drying method has superior photocatalytic activity.
通过自然状态干燥、超临界乙醇干燥、超临界二氧化碳干燥方法制备了纳米级TiO₂光催化剂，并分别用X射线衍射仪（XRD）、傅里叶变换红外光谱仪（FTIR）、傅里叶变换拉曼光谱仪（FT-Raman）和荧光光谱仪进行了表征。我们将光催化剂降解罗丹明B作为模型反应，比较所制备样品的光催化活性。实验结果表明，不同的干燥方法对晶体结构、能带结构、光吸收性能、表面质量和光催化活性有很大影响，超临界二氧化碳干燥法制备的TiO₂光催化剂具有优异的光催化活性。
