Facile synthesis of Cu/Co-ZIF nanoarrays for non-enzymatic glucose detection

Abstract

Cu/Co-ZIF nanoflake arrays on carbon cloth are fabricated by controlling the introducing of Cu2+ ions during the growth of Co-ZIF. The Cu/Co-ZIF-20 electrode prepared with 20 mM Cu2+ possesses large electrochemically active surface area and bimetallic active sites, which can be revealed by cyclic voltammetry tests. The amperometric i–t measurements demonstrate that the Cu/Co-ZIF-20 electrode displays a wide linear range from 0.05 mM to 6.0 mM, and a high sensitivity of 1.03 mA mM−1 cm−2. Good selectivity, repeatability and practical applicability indicate its promising application in enzyme-free glucose sensing.