Photocatalytic Degradation of Phenol Using Immobilized TiO2 Nanotube Photocatalysts
TiO2 nanotubes immobilized on silica gel were used in the photocatalytic degradation of phenol in a batch reactor. The highest rate of photocatalytic activity was observed when the ratios of TiO2 nanotubes: silica gel: colloidal silica were 3 : 2 : 20. The optimal air flow rate for phenol degradatio...
Saved in:
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2011-01-01
|
| Series: | Journal of Nanotechnology |
| Online Access: | http://dx.doi.org/10.1155/2011/904629 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832548616809480192 |
|---|---|
| author | Chung Leng Wong Yong Nian Tan Abdul Rahman Mohamed |
| author_facet | Chung Leng Wong Yong Nian Tan Abdul Rahman Mohamed |
| author_sort | Chung Leng Wong |
| collection | DOAJ |
| description | TiO2 nanotubes immobilized on silica gel were used in the photocatalytic degradation of phenol in a batch reactor. The highest rate of photocatalytic activity was observed when the ratios of TiO2 nanotubes: silica gel: colloidal silica were 3 : 2 : 20. The optimal air flow rate for phenol degradation was 0.3 L/min while pH 3 was optimal for the reaction medium. Decreasing the initial phenol concentration led to an increase in phenol degradation efficiency due to more hydroxyl radicals being presented on the catalyst surface. Immobilized TiO2 nanotubes showed higher photocatalytic activity than that of the pure TiO2 which only achieved 87% degradation. Compared with pure TiO2, the immobilized TiO2 nanotubes benefited from a larger specific surface area and a low recombination rate of photogenerated electron-hole pairs. After three operating cycles, the decrease in photocatalytic activity of the immobilized TiO2 nanotubes was slight, indicating that the immobilized TiO2 nanotubes have excellent stability and reusability. |
| format | Article |
| id | doaj-art-838cb2250d13486ebaddb089bd5c04a6 |
| institution | Kabale University |
| issn | 1687-9503 1687-9511 |
| language | English |
| publishDate | 2011-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Journal of Nanotechnology |
| spelling | doaj-art-838cb2250d13486ebaddb089bd5c04a62025-02-03T06:13:32ZengWileyJournal of Nanotechnology1687-95031687-95112011-01-01201110.1155/2011/904629904629Photocatalytic Degradation of Phenol Using Immobilized TiO2 Nanotube PhotocatalystsChung Leng Wong0Yong Nian Tan1Abdul Rahman Mohamed2School of Chemical Engineering, Universiti Sains Malaysia, Engineering Campus, Nibong Tebal, Seberang Perai, Pulau, Pinang 14300, MalaysiaSchool of Chemical Engineering, Universiti Sains Malaysia, Engineering Campus, Nibong Tebal, Seberang Perai, Pulau, Pinang 14300, MalaysiaSchool of Chemical Engineering, Universiti Sains Malaysia, Engineering Campus, Nibong Tebal, Seberang Perai, Pulau, Pinang 14300, MalaysiaTiO2 nanotubes immobilized on silica gel were used in the photocatalytic degradation of phenol in a batch reactor. The highest rate of photocatalytic activity was observed when the ratios of TiO2 nanotubes: silica gel: colloidal silica were 3 : 2 : 20. The optimal air flow rate for phenol degradation was 0.3 L/min while pH 3 was optimal for the reaction medium. Decreasing the initial phenol concentration led to an increase in phenol degradation efficiency due to more hydroxyl radicals being presented on the catalyst surface. Immobilized TiO2 nanotubes showed higher photocatalytic activity than that of the pure TiO2 which only achieved 87% degradation. Compared with pure TiO2, the immobilized TiO2 nanotubes benefited from a larger specific surface area and a low recombination rate of photogenerated electron-hole pairs. After three operating cycles, the decrease in photocatalytic activity of the immobilized TiO2 nanotubes was slight, indicating that the immobilized TiO2 nanotubes have excellent stability and reusability.http://dx.doi.org/10.1155/2011/904629 |
| spellingShingle | Chung Leng Wong Yong Nian Tan Abdul Rahman Mohamed Photocatalytic Degradation of Phenol Using Immobilized TiO2 Nanotube Photocatalysts Journal of Nanotechnology |
| title | Photocatalytic Degradation of Phenol Using Immobilized TiO2 Nanotube Photocatalysts |
| title_full | Photocatalytic Degradation of Phenol Using Immobilized TiO2 Nanotube Photocatalysts |
| title_fullStr | Photocatalytic Degradation of Phenol Using Immobilized TiO2 Nanotube Photocatalysts |
| title_full_unstemmed | Photocatalytic Degradation of Phenol Using Immobilized TiO2 Nanotube Photocatalysts |
| title_short | Photocatalytic Degradation of Phenol Using Immobilized TiO2 Nanotube Photocatalysts |
| title_sort | photocatalytic degradation of phenol using immobilized tio2 nanotube photocatalysts |
| url | http://dx.doi.org/10.1155/2011/904629 |
| work_keys_str_mv | AT chunglengwong photocatalyticdegradationofphenolusingimmobilizedtio2nanotubephotocatalysts AT yongniantan photocatalyticdegradationofphenolusingimmobilizedtio2nanotubephotocatalysts AT abdulrahmanmohamed photocatalyticdegradationofphenolusingimmobilizedtio2nanotubephotocatalysts |