Enhanced Non-enzymatic amperometric sensing of glucose using Co(OH)2 nanorods deposited on a three dimensional graphene network as an electrode material

Iman Shackery, Umakant Patil, Atiye Pezeshki, Nanasaheb M. Shinde, Seongil Im, Seong Chan Jun

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

We report on the synthesis of cobalt dihydroxide [Co(OH)2] nanorods and their deposition on a 3-dimensional graphene network via chemical bath deposition. The structural characterization reveals deposited Co(OH)2 to consist of flower-like nanorods on a 3-dimensional graphene foam. The nanocomposite was used for glucose sensing by electrocatalytic oxidation of glucose in 1 M KOH solution. Cyclic voltammetry and amperometric studies revealed a high sensitivity for glucose (3.69 mA mM−1 cm−2) and a 16 nM detection limit. The nanocomposite offers a large effective surface (11.4 cm2) and is very selective for glucose over potentially interfering materials such as dopamine, ascorbic acid, lactose, fructose and urea, not the least due to a relatively low working potential of 0.6 V (vs. Ag/AgCl). The high sensitivity, low detection limit and very good selectivity of free-standing nanocomposite electrodes are attributed to the synergistic effect of (a) the good electrocatalytic activity of the NRs, and (b) the large surface area with high conductivity offered by the 3D graphene foam. [Figure not available: see fulltext.]

Original languageEnglish
Pages (from-to)2473-2479
Number of pages7
JournalMicrochimica Acta
Volume183
Issue number8
DOIs
Publication statusPublished - 2016 Aug 1

    Fingerprint

All Science Journal Classification (ASJC) codes

  • Analytical Chemistry

Cite this