Jump to main content
Jump to site search


Cu(0) nanoparticles decorated functionalized reduced graphene oxide sheets as artificial peroxidase enzymes: Application for colorimetric detection of Cr(VI) ion

Abstract

Graphene oxide (GO) sheets were functionalized by a “click” chemistry approach using azide modified GO and alkynyl-terminated D(+)-glucose precursors to produce glucose terminated hydrophilic GO suspension. This hydrophilic functionalized GO surface was utilized for decoration of Cu(0) nanoparticles for sensitive colorimetric detection of Cr(VI) ions, which is not explored till today. The nanocomposite exhibited excellent peroxidase mimic activity towards the colourless chromogenic substance, 3,3′,5,5′-tetramethylbenzidine (TMB), to yield a blue coloured substance 3,3′,5,5′-tetramethylbenzidinediimmine (TMBDI). In acidic medium, Cr(VI) can decompose H2O2 to molecular O2 and H2O. Both O2 and H2O can form hydroxyl radicals (●OH) by combining with the electron of the peroxidase substrate, resulting in enhanced TMB oxidation in presence of Cr(VI). This colorimetric method was highly selective towards Cr(VI) ions with a limit of detection (LOD) of 67.13 nM.

Back to tab navigation

Supplementary files

Publication details

The article was received on 22 Oct 2018, accepted on 07 Dec 2018 and first published on 07 Dec 2018


Article type: Paper
DOI: 10.1039/C8NJ05363D
Citation: New J. Chem., 2018, Accepted Manuscript
  •   Request permissions

    Cu(0) nanoparticles decorated functionalized reduced graphene oxide sheets as artificial peroxidase enzymes: Application for colorimetric detection of Cr(VI) ion

    P. Borthakur, P. K. Boruah, M. R. Das, S. Szunerits and R. Boukherroub, New J. Chem., 2018, Accepted Manuscript , DOI: 10.1039/C8NJ05363D

Search articles by author

Spotlight

Advertisements