期刊
INTERNATIONAL JOURNAL OF PHOTOENERGY
卷 2013, 期 -, 页码 -出版社
HINDAWI LTD
DOI: 10.1155/2013/276504
关键词
-
资金
- Universiti Malaya under UMRG Grant [RP022-2012D]
Self-aligned and high-uniformity carbon (C)- titania (TiO2) nanotube arrays were successfully formed via single step anodization of titanium (Ti) foil at 30 V for 1 h in a bath composed of ethylene glycol (EG), ammonium fluoride (NH4F), and hydrogen peroxide (H2O2). It was well established that applied voltage played an important role in controlling field-assisted oxidation and field-assisted dissolution during electrochemical anodization process. Therefore, the influences of applied voltage on the formation of C-TiO2 nanotube arrays were discussed. It was found that a minimal applied voltage of 30V was required to form the self-aligned and high-uniformity C-TiO2 nanotube arrays with diameter of similar to 75nmand length of similar to 2 mu m. The samples synthesized using different applied voltages were then subjected to heat treatment for the conversion of amorphous phase to crystalline phase. The photocatalytic activity evaluation of C-TiO2 samples was made under degradation of organic dye (methyl orange (MO) solution). The results revealed that controlled nanoarchitecture C-TiO2 photocatalyst led to a significant enhancement in photocatalytic activity due to the creation of more specific active surface areas for incident photons absorption from the solar illumination.
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