纳米孔
氧化还原
循环伏安法
电极
电化学
电化学气体传感器
选择性
化学
4-硝基苯酚
硝基苯酚
材料科学
无机化学
分析化学(期刊)
纳米技术
物理化学
有机化学
催化作用
纳米颗粒
作者
Zhaona Liu,Junguo Du,Cuicui Qiu,Lihui Huang,Houyi Ma,Dazhong Shen,Yi Ding
标识
DOI:10.1016/j.elecom.2009.05.004
摘要
Nanoporous gold (NPG) with uniform pore sizes and ligaments was prepared by a simple dealloying method. The as-prepared NPG samples were used as the working electrodes to investigate the redox behavior of p-nitrophenol (p-NP) by cyclic voltammetry (CV). Quite different from the voltammetric behavior of polycrystalline gold electrode, the CV profiles of NPG display a pair of nearly symmetric redox waves which are ascribed to the reaction of 4-(hydroxyamino)phenol/4-nitrosophenol couple. It is interesting that this pair of redox waves are hardly affected by the isomers of p-NP; and moreover, their peak areas are linear with the concentration of p-NP in the range from 0.25 to 10 mg dm−3. Because of high sensitivity and good selectivity, NPG is expected to act as a promising electrochemical sensor material for detecting trace p-NP in wastewaters.
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