复合钒钛酸干凝胶薄膜的制备及表征

Synthesis and Characterization of Poly-vanadium-titanium Acid Xerogel Thin Films

以V2O5粉末和钛酸丁酯为原料,采用溶胶-凝胶法制备了复合钒钛酸干凝胶(H2V12-xTixO31-y.nH2O(0≤x≤8))薄膜,并对其进行了红外光谱、X射线光电子能谱、热重和X射线衍射分析。结果表明,随着Ti含量的增加,H2V12-xTixO31-y.nH2O中与V有关的振动吸收峰向低频方向移动,且强度减弱;干凝胶薄膜中V以+4价和+5价状态存在,Ti以+4价状态存在;复合钒钛酸干凝胶薄膜为层状结构,Ti取代部分V后改变了层间距,并且其变化是非单调的。

Poly-vanadium-titaniurn acid（H2V12-xTixO31-y·nH2O（0≤x≤8）） xerogel thin films have been fabricated using V2O5 powders and titanium tetrabutylate as precursors by sol-gel process. The obtained xerogels are investigated by IR, XPS, TGA and XRD methods. The results show that the xerogels have been observed low-frequency shift and decrease of the intensity of the strips of the stretching fluctuations with an increase in the content of titanium in the xerogels. The vanadium in the compands is pentavalent and tetravalent, and titanium in the compands is tetravalent. The compounds have a layered structure. The interlayer spacing is changed during the substitution of vanadium by titanium. This change is nonmonotonic.