不同(001)晶面暴露比例的锐钛矿二氧化钛的可控合成研究

Controllable Synthesis and Research of Anatase Titanium Dioxide with Different (001) Facet Exposure Ratio

使用P25（Degussa）二氧化钛作为钛源,二乙醇胺作为形貌控制剂,通过两步水热法制备了含有不同比例的高能（001）晶面的锐钛矿二氧化钛。实验探究了水热温度、二乙醇胺的用量对产物（001）晶面暴露比例的影响。用X-射线衍射仪（XRD）、扫描电镜（SEM）对所制备含有不同比例（001）晶面产物的物相和形貌进行表征分析,计算了不同产物含有的（001）晶面的比例。实验结果表明,二乙醇胺的用量对（001）晶面的暴露比例有很大影响,增加二乙醇胺的用量,产物的（001）面增多。通过控制反应中二乙醇胺的用量,制备出（001）晶面暴露比例为15%~80%的产物。

Anatase titanium dioxide with different proportions of high energy（ 001） facet was prepared by two-step hydrothermal method using P25 as titanium source and diethanolamine as morphology control agent.The exposure rate of high energy（ 001） facet could be controlled.The effects of the hydrothermal temperature and the amount of diethanolamine were investigated.The phase and structure of the Ti O2 products with different ratios of（ 001） facet were confirmed by X-ray diffraction（ XRD） and scanning electron microscopy（ SEM）.The proportion of（ 001） crystal facet of different products was calculated via the SEM patterns. The experimental results shows that the amount of diethanolamine has a great influence on the exposure ratio of（ 001） crystal face,and increasing the amount of diethanolamine will lead the increase of the proportion of exposed（ 001） facet.By controlling the amount of diethanolamine used in the reaction,the（ 001） crystal face exposure ratio of products can be varied from 15% to 80%.