Surface modification and photosensitisation of TiO2 nanocrystalline films with ascorbic acid

Xagas, AP; Bernard, MC; Hugot-Le Goff, A; Spyrellis, N; Loizos, Z; Falaras, P

dc.contributor.author	Xagas, AP	en
dc.contributor.author	Bernard, MC	en
dc.contributor.author	Hugot-Le Goff, A	en
dc.contributor.author	Spyrellis, N	en
dc.contributor.author	Loizos, Z	en
dc.contributor.author	Falaras, P	en
dc.date.accessioned	2014-03-01T01:15:54Z
dc.date.available	2014-03-01T01:15:54Z
dc.date.issued	2000	en
dc.identifier.issn	1010-6030	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/13813
dc.subject	ascorbic acid	en
dc.subject	TiO2 films	en
dc.subject	photosensitisation	en
dc.subject	AFM	en
dc.subject	sol-gel	en
dc.subject.classification	Chemistry, Physical	en
dc.subject.other	TITANIUM-OXIDE	en
dc.subject.other	CHARGE-TRANSFER	en
dc.subject.other	VISIBLE-LIGHT	en
dc.subject.other	CONVERSION	en
dc.subject.other	REDUCTION	en
dc.subject.other	DYE	en
dc.subject.other	SENSITIZATION	en
dc.subject.other	COMPLEXATION	en
dc.subject.other	ELECTRICITY	en
dc.subject.other	SEPARATION	en
dc.title	Surface modification and photosensitisation of TiO2 nanocrystalline films with ascorbic acid	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/S1010-6030(00)00202-1	en
heal.identifier.secondary	http://dx.doi.org/10.1016/S1010-6030(00)00202-1	en
heal.language	English	en
heal.publicationDate	2000	en
heal.abstract	Semi-transparent microporous TiO2 films on SnO2-coated conductive glass were prepared by applying a sol-gel process. Surface topography analysis was conducted with atomic force microscopy, which revealed a highly textured and rough surface, possessing a high capacity for adsorption of a diverse variety of compounds. Surface modification of the films with ascorbic acid results in the formation of a stable, coloured surface complex which red shifts the absorption threshold of TiO2, enhancing utilisation of the solar spectrum. Upon illumination in a liquid electrochemical cell, ascorbic acid injects electrons into the conduction band of the semiconductor, giving rise to electrical current. The incident-photon-to-current efficiency presents a maximum at 415nm (5.29%). (C) 2000 Elsevier Science S.A. All rights reserved.	en
heal.publisher	ELSEVIER SCIENCE SA	en
heal.journalName	JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY	en
dc.identifier.doi	10.1016/S1010-6030(00)00202-1	en
dc.identifier.isi	ISI:000086071300017	en
dc.identifier.volume	132	en
dc.identifier.issue	1-2	en
dc.identifier.spage	115	en
dc.identifier.epage	120	en