Photoactivity of suspended and immobilized P-25 TiO2 nanoparticles on example of diazo congo red dye degradation

Ćurković, Lidija and Ljubas, Davor (2012) Photoactivity of suspended and immobilized P-25 TiO2 nanoparticles on example of diazo congo red dye degradation. = Photoactivity of suspended and immobilized P-25 TiO2 nanoparticles on example of diazo congo red dye degradation. In: Handbook of research on chemoinformatics and chemical engineering. Nova Science Publishers, Inc., New York, pp. 9-25. ISBN 978-162100998-6

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Abstract

This chapter of photocatalytic degradation of aqueous Congo Red dye (CR) solution has been investigated using two batch Pyrex glass photoreactor and artificial UV light (254 nm). For the first reactor A suspended TiO2 (Degussa's P-25) nanoparticles were used, while for another reactor B TiO2 (Degussa's P-25) nanoparticles were immobilized on inner surface of Pyrex glass. A spray coating technique was used for the immobilization of TiO2 nanoparticles. The experiments performed in both photoreactors indicate that the degradation of the Congo Red dye follows a pseudo-first order kinetics according to the Langmuir- Hinshelwood model. Photoactivity of immobilized TiO2 layer for four times diluted CR solutions is almost equal to the photoactivity of the system with suspended photocatalyst. More than 80 of the initial concentration of CR is degraded in both reactors after 6 hours. But, looking at overall decrease of the CR concentration, in reactor A more CR molecules are degraded, since the initial concentration of the CR solution in reactor A is near 4 times higher. Besides the photocatalytic degradation, adsorption process in reactor A on TiO2 nanoparticles was also investigated and described. © 2012 Nova Science Publishers, Inc. All rights reserved.

Item Type: Book Section
Keywords (Croatian): Adsorption; Congo red dye; Photocatalytic degradation; TiO2; UV radiation
Subjects: TECHNICAL SCIENCE > Chemical engineering
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: No
Indexed in Current Contents: No
Citations SCOPUS: 0 (4.5.2015.)
Date Deposited: 04 May 2015 08:55
Last Modified: 07 May 2015 11:36
URI: http://repozitorij.fsb.hr/id/eprint/3868

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