Virgin silver nanoparticles as colorimetric nanoprobe for simultaneous detection of iodide and bromide ion in aqueous medium

Shilpa Bothra, Rajender Kumar, Ranjan K. Pati, Anil Kuwar, Heung Jin Choi, Suban K. Sahoo

Research output: Contribution to journalArticlepeer-review

34 Scopus citations

Abstract

(Graphical abstract). A simple colorimetric nanoprobe based on virgin silver nanoparticles (AgNPs) was developed for the selective detection of iodide and bromide ions via aggregation and anti-aggregation mechanism. With addition of I- ions, virgin AgNPs, in presence of Fe3+, showed perceptible color change from yellow to colorless along with disappearance of surface plasmon resonance (SPR) band of AgNPs at 400 nm. But in presence of Cr3+, AgNPs turned yellow upon addition of I-and Br- anions. The developed virgin AgNPs probe showed high specificity and selectivity with the detection limits down to 0.32 μM and 1.32 μM for I- ions via two different mechanistic routes. Also, the designed probe detects Br- with a detection limit down to 1.67 μM.

Original languageEnglish
Pages (from-to)122-126
Number of pages5
JournalSpectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy
Volume149
DOIs
StatePublished - 5 Oct 2015
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2015 Elsevier B.V. All rights reserved.

Funding

This work was made possible by a grant from the DST , New Delhi ( SR/S1/IC-54/2012 ). We would also like to thank SAIF, Indian Institute of Technology (IIT), Bombay for providing TEM facility.

FundersFunder number
Department of Science and Technology, Ministry of Science and Technology, IndiaSR/S1/IC-54/2012

    Keywords

    • AgNPs
    • Bromide
    • Colorimetric sensor
    • Iodide

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