以醇中加入少量有机胺导电盐作为电解液，以工业纯钛作“牺牲”阳极，控电流电解，可分别得到乙醇钛、异丙醇钛、正丁醇钛等的相应醇溶液．然后直接水解，经溶胶＿凝胶（Ｓｏｌ＿ｇｅｌ） 过程，形成凝胶前体，在４５０ ℃，７２０ ℃煅烧３０ ｍｉｎ 后，均得到高热稳定锐钛矿型（ａｎａｔａｓｅ） 纳米ＴｉＯ２（１０ ｎｍ 左右）．通过ＦＴＩＲ，ＸＲＤ，ＴＥＭ 等测试手段，对钛醇盐和纳米ＴｉＯ２ 进行了表征．本文同时讨论了不同钛醇盐制备纳米ＴｉＯ２ 的优缺点，发现钛酸乙酯制备的纳米ＴｉＯ２ 具有更好的晶型结构和热稳定性
Titanium alkoxides were prepared by anodic dissolution of metallic titanium in absolute ethanol in the presence of HN(C 2H 5) 2·HCl (electro_conductive additives).The solution was directly hydrolyzed to prepare nanocrystalline of TiO 2 (about 10nm)by a sol_gel process.The precursor gels was calcined at T =450 ℃ and 720 ℃for 30 min,and nanocrystalline of TiO 2 (anatase) with high textural and thermal stability was obtained.FTIR,XRD,TEM,were used to characterize the structure of titanium alkoxides and nanocrystalline of TiO 2.The characteristics of nanocrystalline of TiO 2 was depended on the properties of titanium alkoxides.The Ti(OEt) 4 as a source of titanium yielded the best textural and thermal stability nanocrystalline of TiO 2.
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