Wetting and Photocatalytic Properties of TiO2 Nanotube Arrays Prepared via Anodic Oxidation of E-Beam Evaporated Ti Thin Films

Autor: Soon Wook Kim, Hong Ki Kim, Jong Won Yun, Eui Jung Kim, Sung Hong Hahn
Jazyk: angličtina
Rok vydání: 2015
Předmět:
Zdroj: International Journal of Photoenergy, Vol 2015 (2015)
Druh dokumentu: article
ISSN: 1110-662X
1687-529X
DOI: 10.1155/2015/320625
Popis: TiO2 nanotube arrays (TNAs) are fabricated on quartz substrate by anodizing E-beam evaporated Ti films. E-beam evaporated Ti films are directly anodized at various anodizing voltages ranging from 20 to 45 V and their morphological, wetting, and photocatalytic properties are examined. The photocatalytic activity of the prepared TNAs is evaluated by the photodecomposition of methylene blue under UV illumination. The TNAs prepared at an anodizing voltage of 30 V have a high roughness of 30.1 nm and a low water contact angle of 7.5°, resulting in a high photocatalytic performance. The surface roughness of the TNAs is found to correlate inversely with the water contact angle. High roughness (i.e., high surface area), which leads to high hydrophilicity, is desirable for effective photocatalytic activity.
Databáze: Directory of Open Access Journals
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