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

A 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 mu A mu M-1 cm(-2), a low detection limit of 4.0 nM (S/N=3), a wide linear range from 0.2 to 24.1 mu M, good selectivity and anti-interference property.

Automated summary

The sensor reported in this study utilizes N-doped carbon coated TiC nanofiber arrays for detecting Cr(VI) with excellent sensitivity, low detection limit, wide linear range, and good selectivity.