论文部分内容阅读
基于蒙脱石层间域的二维纳米反应器属性,通过溶剂化作用,将氧化钛前躯体钛酸丁酯引入有机季铵盐阳离子插层的蒙脱石层间域中,并使其在蒙脱石层间域中水解、成核和相变结晶.采用XRD、原位升温Raman光谱、TEM分析手段研究了钛酸丁酯进入蒙脱石层间域过程,以及钛酸丁酯在蒙脱石层间域中水解和TiO2成核及相转变过程.结果表明钛酸丁酯成功进入了蒙脱石的层间域中,进入的量随作用时间的增加而增大;钛酸丁酯在蒙脱石层间域中水解生成无定形水合氧化钛,在150℃时开始形成锐钛矿结构的晶核,当焙烧温度达到500℃时,TiO2晶核结晶生成非常有序的锐钛矿结构;当焙烧温度达到700℃时,锐钛矿结构开始相转变为金红石结构,当温度达到1200℃时,锐钛矿相TiO2全部消失转变为金红石相TiO2.
Based on the properties of two-dimensional nano-reactor of interlayer of montmorillonite, titanate, a precursor of titanium oxide, was introduced into interlayer of montmorillonite intercalated with organic quaternary ammonium cation through solvation, Montmorillonite intergranular domain hydrolysis, nucleation and phase transition crystallization.Using XRD, Raman spectroscopy in situ Raman spectroscopy and TEM analysis of the intercalation process of butyl titanate into the interlayer of montmorillonite, The results showed that butyl titanate successfully entered the interlayer of montmorillonite and the amount of entering increased with the increase of reaction time. Butyl titanate Hydrolyzed into montmorillonite interlayer to form amorphous hydrated titanium oxide. At 150 ℃, nuclei with anatase structure begin to form. When the calcination temperature reaches 500 ℃, TiO2 nuclei crystallize to form very ordered anatase Structure. When the calcination temperature reaches 700 ℃, the anatase structure begins to transform into rutile structure. When the temperature reaches 1200 ℃, all the anatase phase TiO2 vanishes and turns into rutile phase TiO2.