【摘要】 以工业制备氧化钛的中间产物(Ti(OH)4)为原料,在180~230℃的碱性条件(KOH溶液)下,采用压力热晶法成功制备出了带状TiO2纳米晶.X射线衍射(XRD)结果表明,制得的TiO2为锐钛矿结构.扫描电镜(SEM)和透射电镜(TEM)观察显示,TiO2纳米晶平均带宽为10~15 nm,长度为几十到几百微米左右.研究表明,原料的预处理和反应温度直接影响纳米晶的生长.前驱物pH值为14,陈化时间为12 h,生成的纳米晶较长,形貌一致;随着温度的升高,产物的晶化程度增加.最后,对带状TiO2的形成机制也进行了讨论.更多还原

【Abstract】 TiO₂ nanobelts were successfully prepared by pressure-thermalcrystallization method in alkaline solution（KOH） at the temperature ranging from 180℃ to 230℃ using the medial product Ti（OH）₄ as raw material,which obtained from the industrial synthesized process of TiO₂.X ray diffraction（XRD） results showed that TiO₂ was anatase structure;Scanning electron microscopy（SEM） and transmission electron microscopy（TEM） observations demonstrated the average width of TiO₂ was 10¹5 nm,with the lengths in the range of several tens to several hundreds micrometers.Further studies implied that the pretreatment of raw material and temperature influence the growth of nanocrystal directly.Longer TiO₂ with uniform size and good quality were obtained when the pH value of solution was 14 and the aged time was 12 hours;the crystallization degree increased with increasing temperature.The formation mechanism of TiO₂ nanobelts was interpreted at last.更多还原