Single Step Formation of C-TiO2 Nanotubes: Influence of Applied Voltage and Their Photocatalytic Activity under Solar Illumination
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 appl...
Saved in:
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2013-01-01
|
| Series: | International Journal of Photoenergy |
| Online Access: | http://dx.doi.org/10.1155/2013/276504 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832551815285047296 |
|---|---|
| author | Chin Wei Lai Srimala Sreekantan |
| author_facet | Chin Wei Lai Srimala Sreekantan |
| author_sort | Chin Wei Lai |
| collection | DOAJ |
| description | 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 30 V was required to form the self-aligned and high-uniformity C-TiO2 nanotube arrays with diameter of ~75 nm and length of ~2 μm. 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. |
| format | Article |
| id | doaj-art-7b6ef76f2d0c40d3a0bd725af6d455e6 |
| institution | Kabale University |
| issn | 1110-662X 1687-529X |
| language | English |
| publishDate | 2013-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Photoenergy |
| spelling | doaj-art-7b6ef76f2d0c40d3a0bd725af6d455e62025-02-03T06:00:22ZengWileyInternational Journal of Photoenergy1110-662X1687-529X2013-01-01201310.1155/2013/276504276504Single Step Formation of C-TiO2 Nanotubes: Influence of Applied Voltage and Their Photocatalytic Activity under Solar IlluminationChin Wei Lai0Srimala Sreekantan1Nanotechnology & Catalysis Research Centre (NANOCAT), Institute of Postgraduate Studies (IPS), Universiti Malaya, 3rd Floor, Block A, 50603 Kuala Lumpur, MalaysiaSchool of Materials and Mineral Resources Engineering, Universiti Sains Malaysia Engineering Campus, Seberang Perai Selatan, Pulau Pinang, 14300 Nibong Tebal, MalaysiaSelf-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 30 V was required to form the self-aligned and high-uniformity C-TiO2 nanotube arrays with diameter of ~75 nm and length of ~2 μm. 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.http://dx.doi.org/10.1155/2013/276504 |
| spellingShingle | Chin Wei Lai Srimala Sreekantan Single Step Formation of C-TiO2 Nanotubes: Influence of Applied Voltage and Their Photocatalytic Activity under Solar Illumination International Journal of Photoenergy |
| title | Single Step Formation of C-TiO2 Nanotubes: Influence of Applied Voltage and Their Photocatalytic Activity under Solar Illumination |
| title_full | Single Step Formation of C-TiO2 Nanotubes: Influence of Applied Voltage and Their Photocatalytic Activity under Solar Illumination |
| title_fullStr | Single Step Formation of C-TiO2 Nanotubes: Influence of Applied Voltage and Their Photocatalytic Activity under Solar Illumination |
| title_full_unstemmed | Single Step Formation of C-TiO2 Nanotubes: Influence of Applied Voltage and Their Photocatalytic Activity under Solar Illumination |
| title_short | Single Step Formation of C-TiO2 Nanotubes: Influence of Applied Voltage and Their Photocatalytic Activity under Solar Illumination |
| title_sort | single step formation of c tio2 nanotubes influence of applied voltage and their photocatalytic activity under solar illumination |
| url | http://dx.doi.org/10.1155/2013/276504 |
| work_keys_str_mv | AT chinweilai singlestepformationofctio2nanotubesinfluenceofappliedvoltageandtheirphotocatalyticactivityundersolarillumination AT srimalasreekantan singlestepformationofctio2nanotubesinfluenceofappliedvoltageandtheirphotocatalyticactivityundersolarillumination |