Immobilization of TiO2 with cement: photocatalytic degradation of phenol and its kinetic studies

Sopyan, Iis and Hafizah, Nor and Jamal, Parveen (2011) Immobilization of TiO2 with cement: photocatalytic degradation of phenol and its kinetic studies. Indian Journal of Chemical Technology, 18 (4). pp. 263-270. ISSN 0975-0991 (O); 0971-457X (P)

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Abstract

Two types of TiO2 powders with water - to - titanium tetraisopropoxide (TPT) ratios of 1 (Powder 1) and 2 (Powder 2) were synthesized via sol-gel method. Both powders were characterized physicochemically before immobilized with white plaster cement for photodegradation of phenol in liquid phase. Aqueous phenol solution containing cement-bonded of TiO2 Powders 1 and 2 were irradiated with UV light of 2.6 mW/cm2 intensity and their efficiency was compared using Langmuir-Hinshelwood kinetic model. From the kinetic analysis, it was found that the adsorption equilibrium constant (KLH) of Powder 1 was higher than that of Powder 2 due to higher specific surface area. Powder 2 has higher value of the reaction rate constant (kr) as its high crystallinity was capable to generate better charge separation to destruct phenol molecules on its surface.

Item Type:	Article (Journal)
Additional Information:	4809/4149
Uncontrolled Keywords:	Sol-gel, TiO2 photocatalyst, Cement-bonded, Phenol solution, Kinetic studies, Langmuir-Hinshelwood
Subjects:	Q Science > QD Chemistry
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Engineering Kulliyyah of Engineering > Department of Biotechnology Engineering Kulliyyah of Engineering > Department of Manufacturing and Materials Engineering
Depositing User:	PROF. DR. IIS SOPYAN
Date Deposited:	10 Oct 2011 16:35
Last Modified:	10 Feb 2012 08:58
URI:	http://irep.iium.edu.my/id/eprint/4149

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