Preparation and Application of Mesoporous Nanotitania Photocatalysts Using Different Templates and pH Media
Mesoporous nanotitania photocatalysts were prepared by sol-gel method in acidic or basic media. Three types of surfactants, namely, cetyltrimethylammonium bromide, sodium dodecylbenzenesulfonate, and nonylphenol ethoxylate, were used as templating agents. The effects of surfactant type and pH on the...
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2014-01-01
|
| Series: | International Journal of Photoenergy |
| Online Access: | http://dx.doi.org/10.1155/2014/687597 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832551914212950016 |
|---|---|
| author | S. M. Abdel-Azim A. K. Aboul-Gheit S. M. Ahmed D. S. El-Desouki M. S. A. Abdel-Mottaleb |
| author_facet | S. M. Abdel-Azim A. K. Aboul-Gheit S. M. Ahmed D. S. El-Desouki M. S. A. Abdel-Mottaleb |
| author_sort | S. M. Abdel-Azim |
| collection | DOAJ |
| description | Mesoporous nanotitania photocatalysts were prepared by sol-gel method in acidic or basic media. Three types of surfactants, namely, cetyltrimethylammonium bromide, sodium dodecylbenzenesulfonate, and nonylphenol ethoxylate, were used as templating agents. The effects of surfactant type and pH on the morphology, particle size, surface area, pore-size distribution, UV-Vis absorbance, and TiO2 phase transformation were traced by SEM, TEM, BET, and XRD. In absence of surfactants, XRD revealed 54.5% anatase at pH 3-4 and 97.0% at pH 7–9. In presence of surfactant, phase transformation of anatase has been significantly inhibited such that anatase amounts to 82–100% in acidic media. In basic media, the brookite phase appeared in low concentrations (8–15%) while rutile totally disappeared. The photocatalytic performance of the synthesized catalysts was tested via naphthalene degradation, which exhibited high activity in visible irradiation (>400 nm). The data obtained indicate that the surface area and pore volume of the current catalysts are the most effective factors for photocatalytic performance. Nevertheless, at the low pH (acidic) range, the CTAB templated catalyst gave the highest surface area (86.7 cm3/g), which is mainly assigned to acquiring the highest photocatalytic degradation of naphthalene (97% after 4 h irradiation time). |
| format | Article |
| id | doaj-art-e3c13c7b34ed4853ac69b24eb917dbf4 |
| institution | Kabale University |
| issn | 1110-662X 1687-529X |
| language | English |
| publishDate | 2014-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Photoenergy |
| spelling | doaj-art-e3c13c7b34ed4853ac69b24eb917dbf42025-02-03T06:00:17ZengWileyInternational Journal of Photoenergy1110-662X1687-529X2014-01-01201410.1155/2014/687597687597Preparation and Application of Mesoporous Nanotitania Photocatalysts Using Different Templates and pH MediaS. M. Abdel-Azim0A. K. Aboul-Gheit1S. M. Ahmed2D. S. El-Desouki3M. S. A. Abdel-Mottaleb4Egyptian Petroleum Research Institute, Nasr City, Cairo 11787, EgyptEgyptian Petroleum Research Institute, Nasr City, Cairo 11787, EgyptEgyptian Petroleum Research Institute, Nasr City, Cairo 11787, EgyptEgyptian Petroleum Research Institute, Nasr City, Cairo 11787, EgyptNanophotochemistry and Solarchemistry Labs, Chemistry Department, Faculty of Science, Ain Shams University, Abbassia, Cairo 11566, EgyptMesoporous nanotitania photocatalysts were prepared by sol-gel method in acidic or basic media. Three types of surfactants, namely, cetyltrimethylammonium bromide, sodium dodecylbenzenesulfonate, and nonylphenol ethoxylate, were used as templating agents. The effects of surfactant type and pH on the morphology, particle size, surface area, pore-size distribution, UV-Vis absorbance, and TiO2 phase transformation were traced by SEM, TEM, BET, and XRD. In absence of surfactants, XRD revealed 54.5% anatase at pH 3-4 and 97.0% at pH 7–9. In presence of surfactant, phase transformation of anatase has been significantly inhibited such that anatase amounts to 82–100% in acidic media. In basic media, the brookite phase appeared in low concentrations (8–15%) while rutile totally disappeared. The photocatalytic performance of the synthesized catalysts was tested via naphthalene degradation, which exhibited high activity in visible irradiation (>400 nm). The data obtained indicate that the surface area and pore volume of the current catalysts are the most effective factors for photocatalytic performance. Nevertheless, at the low pH (acidic) range, the CTAB templated catalyst gave the highest surface area (86.7 cm3/g), which is mainly assigned to acquiring the highest photocatalytic degradation of naphthalene (97% after 4 h irradiation time).http://dx.doi.org/10.1155/2014/687597 |
| spellingShingle | S. M. Abdel-Azim A. K. Aboul-Gheit S. M. Ahmed D. S. El-Desouki M. S. A. Abdel-Mottaleb Preparation and Application of Mesoporous Nanotitania Photocatalysts Using Different Templates and pH Media International Journal of Photoenergy |
| title | Preparation and Application of Mesoporous Nanotitania Photocatalysts Using Different Templates and pH Media |
| title_full | Preparation and Application of Mesoporous Nanotitania Photocatalysts Using Different Templates and pH Media |
| title_fullStr | Preparation and Application of Mesoporous Nanotitania Photocatalysts Using Different Templates and pH Media |
| title_full_unstemmed | Preparation and Application of Mesoporous Nanotitania Photocatalysts Using Different Templates and pH Media |
| title_short | Preparation and Application of Mesoporous Nanotitania Photocatalysts Using Different Templates and pH Media |
| title_sort | preparation and application of mesoporous nanotitania photocatalysts using different templates and ph media |
| url | http://dx.doi.org/10.1155/2014/687597 |
| work_keys_str_mv | AT smabdelazim preparationandapplicationofmesoporousnanotitaniaphotocatalystsusingdifferenttemplatesandphmedia AT akaboulgheit preparationandapplicationofmesoporousnanotitaniaphotocatalystsusingdifferenttemplatesandphmedia AT smahmed preparationandapplicationofmesoporousnanotitaniaphotocatalystsusingdifferenttemplatesandphmedia AT dseldesouki preparationandapplicationofmesoporousnanotitaniaphotocatalystsusingdifferenttemplatesandphmedia AT msaabdelmottaleb preparationandapplicationofmesoporousnanotitaniaphotocatalystsusingdifferenttemplatesandphmedia |