Sonocatalytic degradation of a textile dye over Gd-doped ZnO nanoparticles synthesized through sonochemical process

Title
Sonocatalytic degradation of a textile dye over Gd-doped ZnO nanoparticles synthesized through sonochemical process
Author(s)
주상우Alireza Khataee[Alireza Khataee]Reza Darvishi Cheshmeh Soltani[Reza Darvishi Cheshmeh Soltani]Atefeh Karimi[ Atefeh Karimi]
Keywords
ACID ORANGE 7; RHODAMINE-B; MESOPOROUS SILICA; AQUEOUS-SOLUTIONS; TIO2 NANOTUBES; WASTE-WATER; CATALYST; CARBON; REACTORS; REMOVAL
Issue Date
201503
Publisher
ELSEVIER SCIENCE BV
Citation
ULTRASONICS SONOCHEMISTRY, v.23, pp.219 - 230
Abstract
The present study was performed to sonochemically synthesize GdxZn1-xO (x = 0-0.1) nanoparticles for sonocatalysis of Acid Orange 7 (AO7) in an aqueous medium. The results of X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR) and X-ray photoelectron spectroscopy (XPS) analysis confirmed proper synthesis of Gd-doped sonocatalyst. 5% Gd-doped ZnO nanoparticles with band gap of 2.8 eV exhibited the highest sonocatalytic decolorization efficiency of 90% at reaction time of 90 min. The effects of initial dye concentration and sonocatalyst dosage on decolorization efficiency were evaluated. In the presence of sodium sulfate, sodium carbonate and sodium chloride the decolorization efficiency decreased from 90 to 78, 65 and 56%, respectively. Among various enhancers, the addition of potassium periodate improved the decolorization efficiency from 90 to 100%. The highest decolorization efficiency was obtained at pH value of 6.34(90%). The decolorization efficiency decreased only 6% after 4 repeated runs. Therefore, Gd-doped ZnO nanoparticles can be used as a promising catalyst for degradation of organic pollutants with great reusability potential. (C) 2014 Elsevier B.V. All rights reserved.
URI
http://hdl.handle.net/YU.REPOSITORY/33168http://dx.doi.org/10.1016/j.ultsonch.2014.08.023
ISSN
1350-4177
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공과대학 > 기계공학부 > Articles
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