Controlled acid catalyzed sol gel for the synthesis of highly active TiO2-chitosan nanocomposite and its corresponding photocatalytic activity
For the synthesis of a highly active TiO2-chitosan nanocomposite, pH plays a crucial role towards controlling its morphology, size, crystallinity, thermal stability, and surface adsorption properties. The presence of chitosan (CS) biopolymer facilitates greater sustainability to the photoexcited ele...
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| Format: | Article |
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Springer Verlag (Germany)
2016
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| author | Afzal, S. Samsudin, E.M. Julkapli, N.M. Hamid, Sharifah Bee Abd |
| author_facet | Afzal, S. Samsudin, E.M. Julkapli, N.M. Hamid, Sharifah Bee Abd |
| author_sort | Afzal, S. |
| collection | UM |
| description | For the synthesis of a highly active TiO2-chitosan nanocomposite, pH plays a crucial role towards controlling its morphology, size, crystallinity, thermal stability, and surface adsorption properties. The presence of chitosan (CS) biopolymer facilitates greater sustainability to the photoexcited electrons and holes on the catalysts’ surface. The variation of synthesis pH from 2 to 5 resulted in different physico-chemical and photocatalytic properties, whereby a pH of 3 resulted in TiO2-chitosan nanocomposite with the highest photocatalytic degradation (above 99 %) of methylene orange (MO) dye. This was attributed to the efficient surface absorption properties, high crystallinity, and the presence of reactive surfaces of –NH2 and –OH groups, which enhances the adsorption-photodegradation effect. The larger surface oxygen vacancies coupled with reduced electron-hole recombination further enhanced the photocatalytic activity. It is undeniable that the pH during synthesis is critical towards the development of the properties of the TiO2-chitosan nanocomposite for the enhancement of photocatalytic activity. |
| first_indexed | 2024-03-06T05:44:24Z |
| format | Article |
| id | um.eprints-18084 |
| institution | Universiti Malaya |
| last_indexed | 2024-03-06T05:44:24Z |
| publishDate | 2016 |
| publisher | Springer Verlag (Germany) |
| record_format | dspace |
| spelling | um.eprints-180842018-10-19T04:00:39Z http://eprints.um.edu.my/18084/ Controlled acid catalyzed sol gel for the synthesis of highly active TiO2-chitosan nanocomposite and its corresponding photocatalytic activity Afzal, S. Samsudin, E.M. Julkapli, N.M. Hamid, Sharifah Bee Abd Q Science (General) QD Chemistry For the synthesis of a highly active TiO2-chitosan nanocomposite, pH plays a crucial role towards controlling its morphology, size, crystallinity, thermal stability, and surface adsorption properties. The presence of chitosan (CS) biopolymer facilitates greater sustainability to the photoexcited electrons and holes on the catalysts’ surface. The variation of synthesis pH from 2 to 5 resulted in different physico-chemical and photocatalytic properties, whereby a pH of 3 resulted in TiO2-chitosan nanocomposite with the highest photocatalytic degradation (above 99 %) of methylene orange (MO) dye. This was attributed to the efficient surface absorption properties, high crystallinity, and the presence of reactive surfaces of –NH2 and –OH groups, which enhances the adsorption-photodegradation effect. The larger surface oxygen vacancies coupled with reduced electron-hole recombination further enhanced the photocatalytic activity. It is undeniable that the pH during synthesis is critical towards the development of the properties of the TiO2-chitosan nanocomposite for the enhancement of photocatalytic activity. Springer Verlag (Germany) 2016 Article PeerReviewed Afzal, S. and Samsudin, E.M. and Julkapli, N.M. and Hamid, Sharifah Bee Abd (2016) Controlled acid catalyzed sol gel for the synthesis of highly active TiO2-chitosan nanocomposite and its corresponding photocatalytic activity. Environmental Science and Pollution Research, 23 (22). pp. 23158-23168. ISSN 0944-1344, DOI https://doi.org/10.1007/s11356-016-7507-2 <https://doi.org/10.1007/s11356-016-7507-2>. http://dx.doi.org/10.1007/s11356-016-7507-2 doi:10.1007/s11356-016-7507-2 |
| spellingShingle | Q Science (General) QD Chemistry Afzal, S. Samsudin, E.M. Julkapli, N.M. Hamid, Sharifah Bee Abd Controlled acid catalyzed sol gel for the synthesis of highly active TiO2-chitosan nanocomposite and its corresponding photocatalytic activity |
| title | Controlled acid catalyzed sol gel for the synthesis of highly active TiO2-chitosan nanocomposite and its corresponding photocatalytic activity |
| title_full | Controlled acid catalyzed sol gel for the synthesis of highly active TiO2-chitosan nanocomposite and its corresponding photocatalytic activity |
| title_fullStr | Controlled acid catalyzed sol gel for the synthesis of highly active TiO2-chitosan nanocomposite and its corresponding photocatalytic activity |
| title_full_unstemmed | Controlled acid catalyzed sol gel for the synthesis of highly active TiO2-chitosan nanocomposite and its corresponding photocatalytic activity |
| title_short | Controlled acid catalyzed sol gel for the synthesis of highly active TiO2-chitosan nanocomposite and its corresponding photocatalytic activity |
| title_sort | controlled acid catalyzed sol gel for the synthesis of highly active tio2 chitosan nanocomposite and its corresponding photocatalytic activity |
| topic | Q Science (General) QD Chemistry |
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