Electrochemical determination of 4-nitrophenol using uniform nanoparticle film electrode of glass carbon fabricated facilely by square wave potential pulses. (10th September 2015)

• Record Type: Journal Article
• Authors: Wang, Pengshu; Xiao, Jiayang; Liao, Ayan; Li, Peng; Guo, Manman; Xia, Yue; Li, Zelin; Jiang, Xiaochun; Huang, Wei
• Is Part Of: Electrochimica acta. Volume 176(2015)
• Page Start: 448
• Page End: 455
• Publication Date: 2015-09-10
• Subjects: glass carbon -- uniform nanoparticle film -- square wave potential pulse -- voltammetric determination -- 4-nitrophenol; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2015.07.054
• Languages: English
• ISSNs: 0013-4686

Abstract

Graphical abstract: Highlights: Uniform nanoparticle film of GC was easily prepared by square wave potential pulses. The fabrication involves repeated anodic oxidation of smooth GC in NaOH solution. The thin film decorated with functional groups showed high electrochemical activity. The effects of preparation parameters on CV behaviors of 4-NP were investigated. The film exhibited good performances for voltammetric determination of 4-NP. Abstract: Voltammetric determination of 4-nitrophenol (4-NP) has been preformed at uniform nanoparticle film electrode (UNFE) of glass carbon (GC) (GC-UNFE). The UNFE was facilely fabricated from smooth GC surface in a blank solution of NaOH with square wave potential pulses (SWPPs). This film was composed of uniform, dense GC nanoparticles decorated with oxygen-containing functional groups and exhibited high electrochemical activity. The film formation might be related to repeated pulse electrochemical oxidation of GC surface. The as-prepared film was characterized by cyclic voltammetry (CV), scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). The parameters including anodic potential, time and frequency of SWPPs for film preparation were examined on CV behaviors of 4-NP redox. The oxidation peak was chosen to the 4-NP determination, and under the optimized conditions, its currents varied linearly with a concentration range for 4-NP of 0.5–3000 μM (over two consecutive calibration curves) with a detection limit of 0.23 μM (3σ/slope) and quantification limit of 0.77 μM (10 σ/slope). The advantages of present method included easy fabrication, high sensitivity, good stability, good reproducibility and very broad linear range, and it was successfully applied to detect 4-NP in water samples with satisfied results.