Application of Bismuth Film/Nichrome Electrode for Electrocatalytic Reduction of 4-Nitrophenol

摘要

In this paper, the inexpensive and versatile nichrome was adopted as a substrate to fabricate the bismuth filmichrome electrode (BNCE). The bismuth filmichrome electrode was used as the working electrode to investigate the reduction behavior of 4-nitrophenol by cyclic voltammetry and differential pulse voltammetry. The results revealed that bismuth filmichrome electrode exhibited a sensitive electrochemical response to 4-nitrophenol in pH 5 CH3COOH-CH3COONa solution and 4-nitrophenol reduction was observed at -0.466 V vs. SCE in one well-defined irreversible peak. The calibration curve with two slopes was obtained in the concentration range of 5 x 10~(-8) mol/L to 3 x 10~(-5) mol/L. The detection limit of this method was 5.97 x 10~(-9) mol/L(S/N = 11). This method had the advantages of low cost, negligible toxicity and high sensitivity. It was successfully applied to determine 4-nitrophenol in lake water sample, with recoveries ranging from 97.5 to 102.1 %.