Cause of Slow Phase Transformation of TiO2 Nanorods

被引：33

作者：

Chen, Y. ^{[1
]}

Kang, K. S. ^{[1
]}

Yoo, K. H. ^{[1
]}

Jyoti, N. ^{[1
]}

Kim, Jaehwan ^{[1
]}

机构：

[1] Inha Univ, Ctr EAPap Actuator, Dept Mech Engn, Inchon 402751, South Korea

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2009年 / 113卷 / 46期

关键词：

THIN-FILMS; NANOPARTICLES; STABILITY; PURE;

D O I：

10.1021/jp9086442

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The phase transformation from anatase to rutile in nanocrystalline TiO2 nanorods comprised of length and diameter of approximately 35 and 4 run, respectively, has been investigated. TiO2 nanorods were synthesized at 100 degrees C with titanium isopropoxide as a presusor, oleic acid (OLEA) as a surfactent, and trimethylamine as a catalyst. Characteristic absorption peaks of OLEA were observed from the OLEA-caped TiO2 nanorods after synthesis and disappeared after annealing process. No phase transformation (from anatase to rutile) were observed after annealing at 750 degrees C for 2 h. Only small portion of phase transformation occurred after annealing at 850 degrees C for 2 and 3 h. A relatively slow phase transformation from anatase to rutile might be due to the small diameter of TiO2 nanorods resulting favored surface free energy of the anatase phase.

引用

页码：19753 / 19755

页数：3