N‐Doped Carbon Coated TiC Nanofiber Arrays on Ti‐6Al‐4V for Sensitive Electrochemical Determination of Cr(VI)

Abstract

AbstractA sensitive electrochemical sensor for Cr(VI) detection based on N‐doped carbon coated TiC nanofiber arrays (TiC@CNx NFAs) is reported. The abundant electrocatalytic active sites contained CNx shell, highly conducting TiC core, and good electrical contact between the TiC@CNx and underlying Ti alloy endow this electrode with the excellent electrochemical sensing properties. The developed electrochemical sensor shows remarkable determination activity towards Cr(VI) with a high sensitivity of 0.88 μA μM−1 cm−2, a low detection limit of 4.0 nM (S/N=3), a wide linear range from 0.2 to 24.1 μM, good selectivity and anti‐interference property.