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.

高灵敏度检测饮用水中具有高毒性的有机污染物，由于其低浓度和电化学氧化还原惰性，在电分析中始终面临挑战。在这项工作中，提出了一种新型的纳米材料修饰电极，用于对硝基苯（NB）进行灵敏检测，该方法基于环保且具有成本效益的十二烷基硫酸钠（Ni / Fe（SDS）-LDH）功能化的Ni / Fe层状双氢氧化物。制备此类二维层状复合材料，由于其对NB还原具有良好的催化活性，因此可用于提高NB检测的灵敏度。此外，与Ni / Fe-LDHs修饰电极相比，该电极对NB的敏感性显着提高。这是因为表面改性剂SDS可以提供​​更多的吸附位点，从而显着提高NB的吸附能力，吸附实验和傅立叶变换红外光谱（FTIR）的表征已证实了这一点。结果，在拟议的Ni / Fe（SDS）-LDHs修饰电极上实现了令人印象深刻的传感行为，灵敏度为15.79μAμM^-1厘米^-2。这项工作提供了一种有前途的方法，可以通过表面功能化工程在吸附的能量协同作用基础上构建更先进的纳米材料，用于电化学检测有机污染物。