摘要
采用水热合成法,以 TiO2粉体和 NaOH 为原料,成功地制备出了 TiO2纳米管。用 XRD,SEM,HRTEM,紫外吸收光谱分析仪和光谱辐射分析仪等手段对纳米管进行微观形貌、光学性能的表征,并探讨了其生长机理。结果表明,所得产物为锐钛矿和金红石混晶型 TiO2纳米管,管壁为多层,管的外径分布在 10 nm^50 nm,长度可达几微米甚至十几微米,呈开口状;TiO2纳米管的生长机理符合 3-2-1D 的生长模型,其紫外吸收光谱和光致发光光谱相对于原料粉均呈现出蓝移现象,光致发光光谱显示 TiO2纳米管在可见光区的发光强度明显增强。
TiO2 nanotube was synthesized successfully by hydrothermal process, using TiO2 powder and NaOH as the precurser. The micro-morphology and optical properties were characterized by XRD, SEM, HRTEM, UV Absorption Spectra Analyzer and Spectroradiometer, and the formation mechanism was also studied. The results showed that the product is anatase TiO2 nanotube with multiple layers wall, 10 nmsimilar to50 nm in the out-diameter, several micron to tens in the length, and opened in both of ends. The formation mechanism of the tube is coordinate with 3-2-1D model. The UV Absorption Spectra and PL spectra showed that the TiO2 nanotubes present blue-shift phenomenon compared to the raw material. The PL spectra also showed that at the visible band the luminous intensity of the TiO2 nanotubes increased obviously.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2005年第2期287-290,共4页
Rare Metal Materials and Engineering
基金
国家自然科学基金项目(20271037)
国家杰出青年科学基金项目(50025103)
国家自然科学基金重大研究计划项目(90306014)
中日国际合作项目(50311140138)
关键词
水热合成法
纳米管
多层管壁
蓝移
hydrothermal synthesis
nanotube
multilayer tube-walls
blue-shift