Investigation on hydrophilicity of micro-arc oxidized TiO2 nano/micro-porous layers

被引：38

作者：

Bayati, M. R. ^{[1
]}

Molaei, Roya ^{[1
]}

Kajbafvala, Amir ^{[2
]}

Zanganeh, Saeid ^{[3
]}

Zargar, H. R. ^{[4
]}

Janghorban, K. ^{[5
]}

机构：

[1] Iran Univ Sci & Technol, Sch Met & Mat Engn, Tehran, Iran

[2] N Carolina State Univ, Dept Mat Sci & Engn, Raleigh, NC 27695 USA

[3] Univ Connecticut, Sch Engn, Storrs, CT USA

[4] Univ British Columbia, Dept Mat Engn, Vancouver, BC V5Z 1M9, Canada

[5] Shiraz Univ, Dept Mat Sci & Engn, Shiraz, Iran

来源：

ELECTROCHIMICA ACTA | 2010年 / 55卷 / 20期

关键词：

Titanium oxide; Micro-arc oxidation; Porous materials; Hydrophilic; SURFACE WETTABILITY CONVERSION; PLASMA ELECTROLYTIC OXIDATION; PHOTOCATALYTIC ACTIVITY; THIN-FILMS; SUPER-HYDROPHILICITY; CERAMIC COATINGS; TITANIUM-ALLOYS; DEPOSITION;

D O I：

10.1016/j.electacta.2010.05.021

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Titania porous layers with a rough surface were synthesized via micro-arc oxidation (MAO) and the effect of the applied voltage and electrolyte concentration on surface structure, and chemical composition of the layers was studied. Morphological and topographical investigations, performed by SEM and AFM, revealed that pore size and surface roughness of the layers increased with the applied voltage and the electrolyte concentration. Based on the XRD and XPS results, the grown layers consisted of anatase and rutile phases with varying fractions depending on growth conditions. It was found that anatase/rutile relative content reached its maximum value at medium applied voltages or electrolyte concentrations. Finally, hydrophilicity of the grown layers was determined using a water contact angle apparatus, and a correlation between measured contact angles and MAO-parameters was suggested. It was observed that the layers synthesized under the applied voltage of 400V in the electrolytes with a concentration of log l(-1) exhibited the highest hydrophilicity. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：5786 / 5792

页数：7

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