Amorphous copper cobalt carbonate hydroxide prepared by SILAR on copper foam for non-enzymatic glucose sensing

摘要

Amorphous copper cobalt carbonate hydroxide (CuCoCH) was prepared on copper foam (CF) by successive ionic layer adsorption and reaction (SILAR) method for non-enzymatic glucose sensing. The binder-free approach facilitates the transfer of electrons in the CuCoCH/CF electrode, its hierarchical porous network structure promotes the diffusion of glucose and its large surface area provides abundant catalytic sites for electrocatalysis oxidation of glucose. Moreover, the easily controllable Cu/Co ratio and the synergistic effect of copper and cobalt in CuCoCH increase the electrocatalytic activity for glucose oxidation. As a result, the CuCoCH/CF electrode exhibits a linear range of 0.005-3.47 mM, a sensitivity of 1.5167 mA BULL;mM(-1) BULL;cm(-2) and a detection limit of 2.3 mu M (S/N = 3) for glucose detection. Meanwhile, it also demonstrates satisfactory selectivity, reproducibility, stability and practical applicability, indicating the CuCoCH/CF electrode prepared by this facile method is promising in non-enzymatic glucose sensing.