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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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Main Authors: Afzal, S., Samsudin, E.M., Julkapli, N.M., Hamid, Sharifah Bee Abd
Format: Article
Published: Springer Verlag (Germany) 2016
Subjects:
Q Science (General)
QD Chemistry
Online Access:http://eprints.um.edu.my/18084/
http://dx.doi.org/10.1007/s11356-016-7507-2
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spelling my.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 http://dx.doi.org/10.1007/s11356-016-7507-2 doi:10.1007/s11356-016-7507-2
institution Universiti Malaya
building UM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaya
content_source UM Research Repository
url_provider http://eprints.um.edu.my/
topic Q Science (General)
QD Chemistry
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
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.
format Article
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.
title 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_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_sort controlled acid catalyzed sol gel for the synthesis of highly active tio2-chitosan nanocomposite and its corresponding photocatalytic activity
publisher Springer Verlag (Germany)
publishDate 2016
url http://eprints.um.edu.my/18084/
http://dx.doi.org/10.1007/s11356-016-7507-2
_version_ 1643690605225705472
score 13.211869

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