Defects Regulating of Graphene Ink for Electrochemical Determination of Ascorbic Acid, Dopamine and Uric Acid

Overview

Journal Talanta

Publisher Elsevier

Specialty Chemistry

Date 2018 Jan 16

PMID 29332806

Citations 15

Authors

Li Fu

Aiwu Wang

Guosong Lai

Weitao Su

Francois Malherbe

Jinhong Yu

Cheng-Te Lin

Aimin Yu

Affiliations

Soon will be listed here.

Abstract

A simple water immersing treatment has been established for regulating the electrocatalytic activity of commercial graphene ink. This process enables to remove additives in graphene ink and consequently expose the surface defects. A graphene ink coated glass has been fabricated as an example platform for simultaneous determination of ascorbic acid (AA), dopamine (DA), and uric acid (UA). Cyclic voltammetry studied indicated electrocatalytic reaction can be initiated after the additives leaching during the water immersing treatment. Under optimal conditions, the linear calibration curves were achieved in the range of 50-1000, 3-140, and 0.5-150μM, with detection limits of 17.8, 1.44 and 0.29μM for AA, DA, and UA, respectively. This work demonstrated that the removal of additives of the graphene ink after film coating could be applied as a simple and cost-effective electrochemical platform for sensing application.

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