Efficient photocatalysts by hydrothermal treatment of TiO2

Kontos, AI; Arabatzis, IM; Tsoukleris, DS; Kontos, AG; Bernard, MC; Petrakis, DE; Falaras, P

dc.contributor.author	Kontos, AI	en
dc.contributor.author	Arabatzis, IM	en
dc.contributor.author	Tsoukleris, DS	en
dc.contributor.author	Kontos, AG	en
dc.contributor.author	Bernard, MC	en
dc.contributor.author	Petrakis, DE	en
dc.contributor.author	Falaras, P	en
dc.date.accessioned	2014-03-01T02:43:13Z
dc.date.available	2014-03-01T02:43:13Z
dc.date.issued	2005	en
dc.identifier.issn	0920-5861	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/31315
dc.subject	Adherence	en
dc.subject	AFM	en
dc.subject	Hydrothermal treatment	en
dc.subject	Methyl orange	en
dc.subject	Photocatalyst activity	en
dc.subject	Pollutant degradation	en
dc.subject	TiO2 nanocrystalline thin films	en
dc.subject.classification	Chemistry, Applied	en
dc.subject.classification	Chemistry, Physical	en
dc.subject.classification	Engineering, Chemical	en
dc.subject.other	Glass	en
dc.subject.other	Modification	en
dc.subject.other	Nanostructured materials	en
dc.subject.other	Photocatalysis	en
dc.subject.other	Powder metals	en
dc.subject.other	Solvent extraction	en
dc.subject.other	Titanium dioxide	en
dc.subject.other	Adherence	en
dc.subject.other	Hydrothermal treatment	en
dc.subject.other	Methyl orange	en
dc.subject.other	Photocatalyst activity	en
dc.subject.other	Pollutant degradation	en
dc.subject.other	TiO2 nanocrystalline thin films	en
dc.subject.other	Heat treatment	en
dc.title	Efficient photocatalysts by hydrothermal treatment of TiO2	en
heal.type	conferenceItem	en
heal.identifier.primary	10.1016/j.cattod.2005.03.003	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.cattod.2005.03.003	en
heal.language	English	en
heal.publicationDate	2005	en
heal.abstract	Mixed phase nanocrystalline TiO2 powders (anatase-rutile) (Degussa P25) were prepared by hydrothermal modification. The preparation procedure took place at 200 &DEG; C for 1-10 days in an autoclave system with water as the solvent. Thus, different degrees of modification were achieved. TiO2 water modified nanocrystalline thin films were immobilized on glass substrates by applying a doctor-blade's deposition technique. A variety of spectroscopic [UV-vis reflectance, infra-red (IR), Raman, structural X-ray diffraction (XRD), N-2 absorption (BET)] and microscopic [atomic force microscopy (AFM), scanning electron microscopy (SEM)] techniques were applied to characterize the modified films. A model textile industry pollutant (methyl orange) was used in order to evaluate the photocatalytic efficiency of the modified material. Our results show that the photocatalytic activity of the modified films is improved by a factor of 2 when we extend the hydrothermal treatment up from 1 to about 4 days in the autoclave system. Scratch tests revealed favorable interconnection of the titania nanoparticles as well as significantly higher adhesion to the glass substrate for the modified films, in comparison to the original P25 material. &COPY; 2005 Elsevier B.V. All rights reserved.	en
heal.publisher	ELSEVIER SCIENCE BV	en
heal.journalName	Catalysis Today	en
dc.identifier.doi	10.1016/j.cattod.2005.03.003	en
dc.identifier.isi	ISI:000229535200013	en
dc.identifier.volume	101	en
dc.identifier.issue	3-4 SPEC. ISS.	en
dc.identifier.spage	275	en
dc.identifier.epage	281	en