Journal
TALANTA
Volume 225, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.talanta.2021.122087
Keywords
Ni/Fe layered double hydroxides; Sodium dodecylsulfate; Surface functionalization engineering; Nitrobenzene; Electroanalysis
Categories
Funding
- Natural Science Foundation of Anhui Province [2008085QB70]
- National Science Foundation of China [418061119]
- Key Natural Science Research Project for Colleges and Universities of Anhui Province [KJ2020A0025]
- National College Students Innovation and Entrepreneurship Training Program of China [202010373008]
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A novel nanomaterial modified electrode for sensitive detection of nitrobenzene has been presented in this study, showing improved catalytic activity and adsorption performance compared to conventional modified electrodes, resulting in a remarkably promoted sensitivity. This work provides a promising approach for building more advanced nanomaterials for electrochemical detection of organic pollution based on surface functionalization engineering to enhance adsorption synergistically.
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 mu A mu M-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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