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中文摘要：
以钛酸四丁酯为原料,在盐酸介质中水热合成二氧化钛粉体,通过XRD对所得二氧化钛粉体进行了表征,研究合成条件（如盐酸浓度、反应温度及反应时间等）对所得二氧化钛的相组成及晶粒尺寸的影响。结果表明：产物二氧化钛的相组成受盐酸浓度的影响,而与反应温度及反应时间无关。反应温度及反应时间只影响二氧化钛的晶粒尺寸。光催化降解甲基橙的研究表明,所得锐钛矿、金红石和板钛矿3种混晶中,二氧化钛的光催化活性随着锐钛矿含量的降低而降低;纯金红石型二氧化钛的光催化活性较差。
英文摘要：
Nano-sized titania was prepared by hydrothermal synthesis in HCl medium using tetrabutyl titanate （TNB） as raw material.Product was characterized by X-ray diffraction （XRD）.Effects of reaction conditions,such as reactant concentration,reaction temperature,and reaction time,on crystal phase composition and crystallite size of the product were investigated.Results showed that crystal phase composition was affected only by mix-ratio of the reactants （HCl/TNB）.However,crystallite size was affected by both the reaction temperature and time.Result of photocatalytic degradation of methyl orange showed that the TiO2 photocatalytic activity decreased with the decreasing of anatase ratio in the mixed crystallite of anatase,rutile,and brookite;and photocatalytic activity of pure rutile TiO2 was relatively bad.
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