Synthesis and Characterization of Au-CdS Composite Thin Films for Photoelectrochemical Sensing of Hg super(2+) Ions

This article presents a simple method for fabrication of Au-CdS composite thin films onto indium-tin-oxide (ITO) coated glass substrates. The method starts with electrodeposition of CdS thin films onto ITO substrates and followed by spontaneous growth of Au nanoparticles onto the CdS surface in solu...

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Bibliographic Details
Published inAdvanced Materials Research Vol. 1088; pp. 91 - 95
Main Authors Li, Ping, Huang, Shan, Pan, Hong Cheng
Format Journal Article
LanguageEnglish
Published 01.02.2015
Subjects
Detection
Diffraction
Electrodes
Glass
Mercury (metal)
Substrates
Synthesis (chemistry)
Thin films
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Summary:This article presents a simple method for fabrication of Au-CdS composite thin films onto indium-tin-oxide (ITO) coated glass substrates. The method starts with electrodeposition of CdS thin films onto ITO substrates and followed by spontaneous growth of Au nanoparticles onto the CdS surface in solutions containing AuCl sub(4) super(-) ions. X-ray diffraction (XRD) and UV-vis spectroscopy were used to investigate the Au-CdS thin films. The photoelectrochemical property and sensing for Hg super(2+) ions of the Au-CdS/ITO were studied. The electrode exhibits a low limit of detection of 2.5 [mu]M and a high selectivity for Hg super(2+) ions, even in the presence of a large excess (1000-fold) of other metal (Na super(+), K super(+), Ca super(2+), Mg super(2+), Cd super(2+), Pb super(2+), and Zn super(2+)) ions.
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ISBN:3038354023
9783038354024
ISSN:1022-6680
1662-8985
DOI:10.4028/www.scientific.net/AMR.1088.91