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We propose a new facile electrochemical sensing platform for determination of urea, based on a glassy carbon electrode (GCE) modified with nickel cobalt oxide (NiCo2O4) nanoneedles. These nanoneedles are used for the first time for highly sensitive determination of urea with the lowest detection limit (1 μM) ever reported for the non-enzymatic approach. The nanoneedles were grown through a simple and low-temperature aqueous chemical method. We characterized the structural and morphological properties of the NiCo2O4 nanoneedles by TEM, SEM, XPS and XRD. The bimetallic nickel cobalt oxide exhibits nanoneedle morphology, which results from the self-assembly of nanoparticles. The NiCo2O4 nanoneedles are exclusively composed of Ni, Co, and O and exhibit a cubic crystalline phase. Cyclic voltammetry was used to study the enhanced electrochemical properties of a NiCo2O4 nanoneedle …
Royal Society of Chemistry
Publication date: 
1 Jan 2019

Sidra Amin, Aneela Tahira, Amber Solangi, Valerio Beni, JR Morante, Xianjie Liu, Mats Falhman, Raffaello Mazzaro, Zafar Hussain Ibupoto, Alberto Vomiero

Biblio References: 
Volume: 9 Issue: 25 Pages: 14443-14451
RSC advances