【作者】 赵燕禹； 李勇； 商连弟； 王惠惠； 元应仙；

【Author】 Zhao Yanyu~1,Li Yong~1,Shang Liandi~2,Wang Huihui~2,Yuan Yingxian~1 (1.Tianjin Vocational Institute,Tianjin 300410,China;2.CNOOC Tianjin Chemical Research & Design Institute)

【机构】 天津职业大学； 中海油天津化工研究设计院；

【摘要】 以钛白生产中的中间产物硫酸氧钛及工业尿素为原料,采用常压水解法,研究制备纳米二氧化钛粉体的最佳工艺条件。实验详细考察了纳米二氧化钛制备工艺流程中的主要影响因素:硫酸氧钛质量浓度、尿素质量浓度、硫酸氧钛与尿素配比等。根据实验的工艺参数,得出了纳米二氧化钛的最佳制备方案:硫酸氧钛与尿素的物质的量比为1:2,硫酸氧钛最佳质量浓度为40g/L,尿素的最佳质量浓度为50g/L,在反应体系中添加适量表面活性剂,反应温度为85℃±5℃,在高速搅拌下反应2 h,始终保持pH为2。反应完成后,产物用去离子水洗涤,再用无水乙醇洗涤1次。样品在85℃烘干2～3h,最后在700℃焙烧2h,即得产品。经上述工艺过程制备的纳米二氧化钛超细粉,晶相为锐钛型,粒子直径为7～13nm。更多还原

【Abstract】 Optimum conditions of preparing nano-TiO₂ powder by atmospheric hydrolysis were studied,which used the intermediate product titanyl sulfate of industrial titanium dioxide production and industrial urea as raw materials.The effective factors in production process of nano-TiO₂ such as concentrations of TiOSO4 and urea,as well as the ratio of TiOSO₄ to urea were investigated.According to experimental parameters,the best preparation program of nano-TiO₂ was obtained.Namely,amount-of-substance ratio of TiOSO₄ to CO（NH₂）₂ was 1:2,TiOSO₄ concentration was 40 g/L,C0（NH₂）₂ concentration was 50 g/L.Adding a certain amount of surfactant into the reaction system,reaction temperature was 85℃±5℃,reaction time was 2h under high-speed stirring,maintaining pH at 2.After reaction,the product was washed with deionized water,and then washed again with ethanol.Finally,the product was dried at 85℃for 2～3h and calcined at 700℃for 2h.Consequently,the anatase nano-TiO₂ powder with particle size of 7～13 nm was obtained.更多还原