Document Detail


Silver nanoparticles embedded in cyclodextrin-silicate composite and their applications in Hg(ii) ion and nitrobenzene sensing.
MedLine Citation:
PMID:  23358544     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Different synthetic routes were described to prepare silver (Ag) nanoparticles (NPs) embedded in an amine functionalized silicate sol-gel matrix (TPDT) by employing different combination of reagents such as silicate sol-gel (TPDT), β-cyclodextrin (CD)-TPDT, TPDT-surfactant (BDAC), CD-TPDT-BDAC and CD-TPDT-BDAC/ascorbic acid (AA). The spectral and colorimetric detection of Hg(ii) ions were carried out using the Ag NPs which showed a significant blue shift in the surface plasmon resonance (SPR) band upon the addition of Hg(ii) ions. It was found that the addition of optimum level of Hg(ii) ions into the Ag NPs completely quenched the SPR band and deformed the shape of the Ag NPs due to the formation of anisotropic Ag amalgam crystals (AgHg). The selective detection of Hg(ii) ions using the Ag NPs in the presence of other environmentally relevant metal ions by spectral and colorimetric methods was also reported. Furthermore, the prepared Ag nanostructure modified electrodes were employed for the electrocatalytic reduction and sensing of nitrobenzene.
Authors:
Shanmugam Manivannan; Ramasamy Ramaraj
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2013-1-29
Journal Detail:
Title:  The Analyst     Volume:  -     ISSN:  1364-5528     ISO Abbreviation:  Analyst     Publication Date:  2013 Jan 
Date Detail:
Created Date:  2013-1-29     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0372652     Medline TA:  Analyst     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
School of Chemistry, Centre for Photoelectrochemistry, Madurai Kamaraj University, Madurai, 625 021, India. ramarajr@yahoo.com.
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