硝基苯
化学
纳米材料
吸附
电化学
表面改性
傅里叶变换红外光谱
十二烷基硫酸钠
电化学气体传感器
电极
化学工程
无机化学
纳米技术
催化作用
材料科学
色谱法
有机化学
物理化学
工程类
作者
Shanshan Li,Jinhui Fang,Li Li,Min Zhu,Feng Zhang,Boya Zhang,Tian Jiang,Yongxing Zhang
出处
期刊:Talanta
[Elsevier]
日期:2021-04-01
卷期号:225: 122087-122087
被引量:33
标识
DOI:10.1016/j.talanta.2021.122087
摘要
Hypersensitive detection of organic pollutions with high toxicity in drinking water always keeps its challenge in electroanalysis due to their low concentration and electrochemical redox inert. In this work, a novel nanomaterial modified electrode for the sensitive detection of nitrobenzene (NB) is presented, based on environmental friendly and cost-effective Ni/Fe layered double hydroxides functionalized with sodium dodecyl sulfate (Ni/Fe(SDS)-LDH). Such 2D layered composites were prepared and used to improve the sensitivity for NB detection, due to its good catalytic activity for NB reduction. Besides, the proposed electrode shows a remarkably promoted sensitivity to NB compared to Ni/Fe-LDHs modified one. It is because that the surface modifier SDS can provide more adsorption sites to significantly improve the adsorption of NB, which has been confirmed by the adsorption experiment and the characterization of Fourier transform infrared spectroscopy (FTIR). As a result, an impressive sensing behaviour is achieved at the proposed Ni/Fe(SDS)-LDHs modified electrode with a sensitivity of 15.79 μA μM−1 cm−2. This work provides a promising way to build more advanced nanomaterials to electrochemical detection of organic pollution based on energetically synergizing of adsorption by surface functionalization engineering.
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