Synthesis, characterization and photocatalytic properties of sol-gel TiO2 films

Šegota, Suzana and Ćurković, Lidija and Ljubas, Davor and Svetličić, Vesna and Fiamengo Houra, Ivona and Tomašić, Nenad (2011) Synthesis, characterization and photocatalytic properties of sol-gel TiO2 films. = Synthesis, characterization and photocatalytic properties of sol-gel TiO2 films. Ceramics International, 37 (4). pp. 1153-1160. ISSN 0272-8842. Vrsta rada: ["eprint_fieldopt_article_type_article" not defined]. Kvartili JCR: Q1 (2011). Točan broj autora: 6.

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Abstract

The application of heterogeneous photocatalysis is described as an advanced oxidation process (AOP) for the degradation of the diazo reactive dye using immobilized TiO2 as a photocatalyst. Starting TiO2 solutions were prepared with and without the addition of polyethylene glycol (PEG) and TiO2 films were directly deposited on a borosilicate glass substrate using the sol-gel dip-coating method. The surface morphology and the nanoscale roughness of TiO2 films were studied by means of atomic force microscopy (AFM). Structural properties of TiO2 were identified by X-ray diffraction (XRD). The decomposition behaviour of organic compounds from the gels was investigated using thermal gravimetry (TG) and differential scanning calorimetry (DSC). Photocatalytic activities of TiO2 films in the process of degradation of the commercial diazo textile dye Congo red (CR), used as a model pollutant, were monitored by means of UV/vis spectrophotometry. The kinetics of the degradation of the CR dye was described with the Langmuir-Hinshelwood (L-H) kinetic model. The addition of PEG to the TiO2 solution resulted in the changes in the film surface morphology, and affected the ratio of anatase-rutile crystal phases and the photocatalytic activity of TiO2. The TiO2 film prepared with PEG is characterized by higher roughness parameters (Ra, Rmax, Rq, Rz and Zmax), a lower amount of the rutile phase of TiO2, a higher amount of the anatase phase of TiO 2 and a better photocatalytic activity compared to the TiO 2 film without the addition of PEG. © 2010 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

Item Type:	Article (["eprint_fieldopt_article_type_article" not defined])
Keywords (Croatian):	A. Sol-gel process; Advanced oxidation process; Anatase phase; Atomic force; Borosilicate glass substrates; Congo red; Congo red dye; Film surface morphology; Heterogeneous photocatalysis; Immobilized TiO; Kinetic models; Langmuir-Hinshelwood; Nano-scale roughness; Photocatalytic activities; Photocatalytic property; Reactive dyes; Roughness parameters; Rutile crystal; Rutile phase; Sol-gel dip-coating method; Sol-gel TiO; Textile dyes; Thermal gravimetry; TiO; UV/TiO2; UV/vis spectrophotometry; Atomic force microscopy; Azo dyes; Borosilicate glass; Degradation; Differential scanning calorimetry; Film preparation; Gels; Morphology; Oxide minerals; Photocatalysis; Photocatalysts; Polyethylene glycols; Polyethylene oxides; Sol-gels; Sols; Substrates; Surface morphology; Textile finishing; Titanium dioxide; X ray diffraction; Sol-gel process
Subjects:	TECHNICAL SCIENCE
Divisions:	1000 Department of Materials > 1010 Chair of Materials and Tribology 500 Department of Energy, Power Engineering and Environment > 540 Chair of Water and Environmental Engineering
Indexed in Web of Science:	Yes
Indexed in Current Contents:	Yes
Quartiles:	Q1 (2011)
Date Deposited:	22 Apr 2015 07:50
Last Modified:	29 Aug 2017 12:34
URI:	http://repozitorij.fsb.hr/id/eprint/3815

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