摘要
二氧化钛是目前为止较理想的半导体光电材料,多用于光催化及太阳能电池。本文利用水热法合成正方块状锐钛矿结构的纳米二氧化钛单晶颗粒,并利用TEM表征其形成过程。这些纳米颗粒平均尺度为50 nm,暴露出较高比例的(001)高能面。通过实验进一步发现该纳米晶的形成源于液相中均匀分布的一氧化钛量子点,其形成是一个聚集-相变-重结晶的过程,最终在氟离子作用下形成正方块状单晶二氧化钛纳米颗粒。
This paper reported a new synthesis route of anatase nanosquare TiO2 single crystal with exposed（001） facet.The nanocrystals were prepared by solid Titanium Oxy Acetylacetoneate dispersed in mixed solvent of acetylacetone and ethanol,followed by a hydrothermal treatment in NH4F solution with PVP added.After heated at 160 ℃ in different days,it was found that the nanosquares formed from titanium monoxide nanodots in a process of aggregation,phase transform and recrystallization.The final nanosquare TiO2 was formed under the action of fluorin ions with the size of 30~50 nm and exposed（001） facet.
出处
《电子显微学报》
CAS
CSCD
2012年第1期17-21,共5页
Journal of Chinese Electron Microscopy Society
关键词
纳米
二氧化钛
一氧化钛
量子点
相变
重结晶
nanosquare
titania
titanium monoxide
nanodot
phase transform
recrystallization
