Electrochemical sensor for detection of p-nitrophenol based on nanoporous gold
Electrochemical sensor for detection of p-nitrophenol based on nanoporous gold
复制标题
基于纳米多孔金的对硝基苯酚检测电化学传感器
DOI：
10.1016/j.elecom.2009.05.004
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发表时间：
2009-07-01
影响因子：
5.4
通讯作者：
Ding, Yi
中科院分区：
文献类型：
--
作者：
Liu, Zhaona;Du, Junguo;Ding, Yi
采用简单的脱合金法制备了孔径均匀的纳米多孔金（NPG）。以所制备的NPG为工作电极，采用循环伏安法研究了对硝基苯酚（p-NP）的氧化还原行为。与多晶金电极的伏安行为完全不同，NPG的循环伏安曲线显示一对几乎对称的氧化还原波，这是由4-（羟氨基）苯酚/4-亚硝基苯酚电对反应引起的。有趣的是，这对氧化还原波几乎不受p-NP异构体的影响，而且，它们的峰面积与p-NP浓度在0.25 - 10 mg dm ~（-3）范围内呈线性关系。由于NPG具有高灵敏度和良好的选择性，有望成为一种很有前途的电化学传感器材料，用于检测废水中的痕量p-NP。(c)2009 Elsevier B. V.保留所有权利。
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. (c) 2009 Elsevier B.V. All rights reserved.