期刊
CHEMISTRYSELECT
卷 5, 期 8, 页码 2424-2429出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/slct.201904511
关键词
Electrochemical Sensors; Graphene Oxide; NiO nanosheets; Urea
资金
- Danish Research Council for Technology and Product Science [12127447]
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops [SKL2019007]
- National Natural Science Foundation of China [31960496]
- National Natural Science Foundation of Xinjiang [2018D01 C040]
- National key RD projects [2019YFC1606100]
- Xinjiang University
A simple, rapid and sensitive electrochemical sensor for determination of urea has been developed based on two-dimensional (2D) Free-standing NiO nanosheet. High quality, ultrathin two-dimensional NiO nano-sheets were synthesized by using graphene oxide paper as sacrificial template. Various techniques such as x-ray diffraction (XRD), x-ray photoelectron spectroscopy (XPS), scanning electron microscope (SEM) and transmission electron microscopy (TEM) were used to characterize the morphology of the nanostructure. According to TEM image, the average size of the as-synthesized NiO nanosheets is around 50 nm and with 5-20 nm pores. Electrochemical studies indicate that the 2D NiO papers exhibit excellent stability and high electrocatalytic activity for the oxidation of urea in an alkaline medium, even without any conductive supporting agent, and low oxidation potential (vs SCE), high sensitivity (3.4 A/M cm(2)) and a low detection limit (2 mu M) as a non-enzymatic sensor for urea.
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