Skip navigation
Please use this identifier to cite or link to this item:
Title: Visible-light-induced photodegradation of methylene blue using ZnO/CdS heteronanostructures synthesized through a novel thermal decomposition approach
Authors: Kandula S.
Jeevanandam, Pethaiyan
Published in: Journal of Nanoparticle Research
Abstract: ZnO/CdS heteronanostructures with different shell thicknesses (20-45 nm) have been successfully synthesized by a novel thermal decomposition approach, and the synthesis involves three steps. In the first step, ZnO nanorods were synthesized by homogeneous precipitation method. Then, the surface of ZnO nanorods was functionalized using citric acid as the surface-modifying agent. Finally, the cadmium sulfide (CdS) shell was deposited on the surface-modified ZnO nanorods by the thermal decomposition of cadmium acetate and thiourea in ethylene glycol at 180°C. The ZnO/CdS heteronanostructures were characterized using X-ray diffraction, infrared spectroscopy, thermal gravimetric analysis, scanning electron microscopy (SEM), transmission electron microscopy (TEM), diffuse reflectance spectroscopy (DRS), and photoluminescence spectroscopy. SEM and TEM results indicate the deposition of CdS shell on the ZnO nanorods, and DRS results show blue shift of CdS band gap absorption with respect to bulk CdS. PL results show evidence for synergistic interaction between ZnO and CdS. The ZnO/CdS heteronanostructures were explored as catalyst for visible-light-induced photocatalytic degradation of methylene blue in an aqueous solution. The ZnO/CdS samples show higher photocatalytic activity for the degradation of methylene blue compared with pure ZnO nanorods and CdS nanoparticles. The possible mechanism for the formation of CdS shell on the ZnO nanorods and the mechanism for photodegradation of methylene blue are explained in detail. © Springer Science+Business Media 2014.
Citation: Journal of Nanoparticle Research (2014), 16(6): -
Issue Date: 2014
Publisher: Kluwer Academic Publishers
Keywords: CdS
Methylene blue
Thermal decomposition
ISSN: 13880764
Author Scopus IDs: 56120130000
Author Affiliations: Kandula, S., Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee 247667, India
Jeevanandam, P., Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee 247667, India
Funding Details: Acknowledgments Financial support from the Ministry of Human Resource Development, Government of India is gratefully acknowledged. We are thankful to the Institute Instrumentation Centre, Indian Institute of Technology Roorkee for providing the XRD, TGA, FE-SEM, and TEM facilities.
Corresponding Author: Jeevanandam, P.; Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee 247667, India; email:
Appears in Collections:Journal Publications [CY]

Files in This Item:
There are no files associated with this item.
Show full item record

Items in Repository are protected by copyright, with all rights reserved, unless otherwise indicated.