Influence of Titanium Dioxide Preparation Method on Photocatalytic Degradation of Organic Dyes

Gilja, Vanja; Kratofil Krehula, Ljerka; Katančić, Zvonimir; Krehula, Stjepko; Hrnjak- Murgić, Zlata; Travaš-Sejdić, Jadranka (2018) Influence of Titanium Dioxide Preparation Method on Photocatalytic Degradation of Organic Dyes. Croatica chemica acta, 91 (3). ISSN 0011-1643

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Abstract

Titanium catalysts (TiO2) were synthesized by three different methods. Their photocatalytic activity was validated through photodegradation of Reactive Red 45 (RR45) azo dye and Acid Blue 25 (AB25) anthraquinone dye in an aqueous solution under UV irradiation. TiO2 photocatalysts were characterized by FTIR, XRD and SEM. Photosensitivity and TiO2 activity range were characterized by UV/Vis spectroscopy. Photocatalytic validation has been made by way of determining the degree of RR45 and AB25 removal. TOC was determined as a measure of the mineralization of RR45 and AB25 by photocatalysis. The stability of TiO2 catalysts and a possibility of using them in consecutive photocatalysis cycles have also been studied. The results show that the photocatalytic efficiency depends on the crystal structure of TiO2. The size of crystallites depends on synthesis conditions. From the results of photocatalytic efficiency it is concluded that the chemical interaction between a catalyst and a dye strongly depends on the dye chemical structure.

Item Type:	Article
Uncontrolled Keywords:	titanium dioxide ; photocatalysis ; organic dyes ; wastewater treatment
Subjects:	NATURAL SCIENCES > Chemistry
Divisions:	Division of Materials Chemistry
Projects:	Project title Project leader Project code Project type Razvoj fotokatalitičkih polimernih nanokompozita za obradu otpadnih voda-DePoNPhoto Zlata Hrnjak-Murgić IP-2013-11-5092 HRZZ
Depositing User:	Stjepko Krehula
Date Deposited:	30 Jul 2018 11:38
URI:	http://fulir.irb.hr/id/eprint/4109
DOI:	10.5562/cca3292

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