The fabrication of TiO2 mesoporous thick films by employing a pre-embedded ZnO nanorods support.
TiO2 mesoporous films with a thickness more than 2 microm were synthesized through the evaporation-induced self-assembly approach. In order to prevent the formation of cracks due to the strain during the calcination, we employed the ZnO nanorod arrays as a pre-embedded support, which were obtained from an aqueous solution method. The spaces between ZnO nanorods were filled with TiO2 sol-gel by a dip-coater. Then ZnO nanorods embedded in the thick film were eliminated by a wet chemical etching method and the left spaces were refilled by the TiO2 sol-gel. As a result, a dense and thick TiO2 mesoporous film was obtained. The resultant materials were characterized in detail by using small angle X-ray diffraction (SAXRD), field-emission scanning electron microscopy (FESEM) and transmission electron microscopy methods (TEM).
He
Weizhen
W
Department of Nano Materials and BK 21 Nano Fusion Technology Division, Pusan National University, Miryang 627-706, South Korea.
Qiu
Jijun
J
Park
Se-Jeong
SJ
Lee
Jea-Ho
JH
Kim
Yang-Do
YD
Kim
Hyung-Kook
HK
Hwang
Yoon-Hwae
YH