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Journal of Nanomaterials
Volume 2014 (2014), Article ID 250803, 6 pages
http://dx.doi.org/10.1155/2014/250803
Research Article

Photocatalytic Degradation of 2-Chlorophenol Using Ag-Doped TiO2 Nanofibers and a Near-UV Light-Emitting Diode System

1Department of Environmental Engineering, Chosun University, Gwangju 501-759, Republic of Korea
2Center for Novel States of Complex Materials Research, Department of Physics and Astronomy, Seoul National University, Seoul 151-747, Republic of Korea

Received 4 October 2013; Accepted 11 December 2013; Published 8 January 2014

Academic Editor: Ranjit T. Koodali

Copyright © 2014 Ju-Young Park and In-Hwa Lee. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This report investigated the photocatalytic degradation of 2-chlorophenol using TiO2 nanofibers and Ag-doped TiO2 nanofibers, synthesized using the sol-gel and electrospinning techniques, and an ultraviolet light-emitting diode (UV-LED) system as a UV light source. The crystallite size of the Ag-doped TiO2 nanofibers was smaller than that of the TiO2 nanofibers, because silver retrained phase transformation not only controls the phase transformation but also inhibits the growth of anatase crystallites. The activation energies for the grain growth of the TiO2 nanofibers and the Ag-doped TiO2 nanofibers were estimated to be 20.84 and 27.01 kJ/mol, respectively. The photocatalytic degradation rate followed a pseudo-first-order equation. The rate constants ( ) of the TiO2 nanofibers and the Ag-doped TiO2 nanofibers were 0.056 and 0.144 min−1, respectively.