Influence of copper on the microstructure of sol-gel titanium oxide nanotubes array

被引：12

作者：

Lopez-Ayala, S. ^{[1
]}

Rincon, M. E. ^{[1
]}

Pfeiffer, H. ^{[2
]}

机构：

[1] Univ Nacl Autonoma Mexico, Ctr Invest Energia, Temixco 62580, Mor, Mexico

[2] Univ Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, Mexico

来源：

JOURNAL OF MATERIALS SCIENCE | 2009年 / 44卷 / 15期

关键词：

TIO2; NANOTUBES; CATALYSTS; PHOTOCATALYSIS; DEGRADATION; FABRICATION; OXIDATION; CU/TIO2; GROWTH; NO;

D O I：

10.1007/s10853-009-3617-2

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effect of copper addition in the microstructure of sol-gel titanium oxide (TiO2) supported on anodic aluminum oxide (AAO) membranes is reported. Two deposition methods based on immersion and flow techniques were used for the coating of the porous AAO membrane. Copper-free membranes were studied as a function of different ratios of H+/Ti, H2O/Ti, selecting the most appropriate for the sensitization with copper. For copper-doped TiO2 arrays, the presence of copper causes the reduction of grain size and enhances titania deposition inside the AAO pores, although no clear tendency with copper content was found. The formation of copper-doped titania nanotubes was validated after dissolving the AAO membranes, finding a deposition-dependent stability in the Cu-doped materials. Titania and Cu-doped titania nanotubes analyzed as colloidal solutions show band gaps substantially shifted to the red in comparison to the direct band gap of near-spherical colloidal materials. These arrays are important for photocatalysis and for the development of third generation photovoltaic devices.

引用

页码：4162 / 4168

页数：7

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