【摘要】 采用Ti(SO4)2和尿素为原料,利用均相沉淀-发泡工艺制备出了纳米氧化钛粉体材料,并用DTA-TG、XRD、IR和FS等方法对样品进行了表征。DTA-TG结果表明TiO2样品在高温固相反应期间有两个明显的失重台阶。XRD分析表明,在500℃下焙烧的TiO2样品为相纯度较高的锐钛矿型氧化钛粉体,其平均粒径约为12.834nm。IR谱图显示随着烧结温度的升高,450~800cm-1处Ti-O键的伸缩振动峰出现分裂,且峰形逐渐锐化,表明纳米样品的尺寸有所增大。FS分析表明在365nm激发波长下,600℃煅烧下生成的混合晶型的纳米氧化钛具有最强受激发射峰,而在393nm激发光下,500℃煅烧下生成的锐钛矿型氧化钛具有最强受激发射峰。更多还原

【Abstract】 Nano-sized titanium oxide powders were prepared from Ti（SO₄）₂ and urea by homogeneous precipitation-frothing method DTA-TG, XRD, IR and FS were used in characterizing the products. DTA-TG showed that there were two obvious steps of weight loss upon heating of TiO₂ XRD showed that the powder calcined at 500℃ was pure anatase phase titanium oxide with an average particle size of 12.834 nm. IR indicated that the flat and broad band in the region 450～800 cm -1 would narrow with an increase of particle size caused by incressing the calcining temperature. The FS result revealed that the anatase/rutile titanium oxide calcined at 600℃ had the strongest emission peak excitated by 365 nm and the anatase titanium oxide calcined at 500℃ had the strongest emission peak excitated by 393 nm.更多还原