Chauhan, Neha and Gupta, Shweta and Singh, Nahar and Singh, Sukhvir and Islam, Saikh S. and Sood, Kedar N. and Pasricha, Renu (2011) Aligned nanogold assisted one step sensing and removal of heavy metal ions. Journal of Colloid and Interface Science , 363 (1). pp. 42-50. ISSN 0021-9797

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Abstract

We depict a novel strategy exploiting the chemistry of metal ion adsorption for detection and sequestration of toxic heavy metal from processed water using gold nanoparticles capped with 4-aminothiophenol. The interaction between 4-aminothiophenol capped gold nanoparticles and heavy metal ions was studied as a function of time and concentration using TEM, HRTEM, SEM, EDS, and I–V characterization. Experiments confirmed that pH is one of the crucial controlling parameters. Adsorption capacity was monitored using AAS, UV–vis spectroscopy and I–V measurement. In the absence of any alloy formation between Au and heavy metal ions, the desorption of the heavy metal ions from 4-aminothiophenol capped gold nanoparticles surface by pH modulation serves as a mean of collection of heavy metal ions. Experiments revealed that the concentration of heavy metal ions in processed water after adsorption is below the maximum permissible limit set by the WHO.

Item Type:	Article
Additional Information:	Copyright for this article belongs to M/s Elsevier B.V.
Uncontrolled Keywords:	4-Aminothiophenol; Adsorption; Electrical conductivity; Gold nanoparticles; Heavy metal ions; Optical absorbance
Subjects:	Chemistry Chemistry > Physical Chemistry
Divisions:	UNSPECIFIED
Depositing User:	Mr. Abhishek Yadav
Date Deposited:	31 Oct 2012 09:01
Last Modified:	31 Oct 2012 09:01
URI:	http://npl.csircentral.net/id/eprint/783

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