钛酸丁酯有机相乙酐沉淀前驱物制备纳米晶体二氧化钛

Processing of nano-meter sized TiO_2 from the precursor precipitated from Ti(OBu)_4 with (CH_3CO)_2O in organic solvent

钛酸丁酯和乙酐在低于 10 0℃非水状态下生成非晶钛氧有机化合物 ,经焙烧得到纳米二氧化钛晶体。差热分析表明 ,表面吸附物和键合有机基团在 3 14～ 3 89℃之间发生氧化和分解而除去 ,3 89～ 40 5℃之间无定形粉体转化为锐钛矿型晶体 ;热重分析中 ,表面物理吸附物失重 10 .60 % ,键合有机基团失重46.5 5 %。制备的纳米二氧化钛为球形粒子 ,粒径为 10～ 3 0nm。

Nanometer titanium dioxide powders have been synthesized by the reaction of titanium tetrabutoxy with acetic anhydride below 100℃.After being calcinated, the reaction products may form crystalline anatase. The curve of DTA showed that compositions were removed between 314～389℃ and the anatase formed between 389～405℃. The curve of TGA showed that the losing rate of weight of the substance absorbed physically was 10.60% and the organic component part combined chemically was 46.55%. The nano crystal particles of titanium dioxide have fine sphere and their sizes of are from 10nm to 30nm.