期刊
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
卷 32, 期 3, 页码 468-473出版社
HIGHER EDUCATION PRESS
DOI: 10.1007/s40242-016-5367-4
关键词
Cu2O; Nitrogen-doped graphene; Ofloxacin; Electrochemical method; Determination
资金
- National Natural Science Foundation of China [21071005, 21271006]
- Natural Science Foundation of the Education Bureau of Anhui Province, China [KJ2015A024]
- Graduate Student Innovation Fund of Anhui University of Technology, China [2014033]
Cu2O/nitrogen-doped grapheme(NG) nanocomposite material was prepared via a facile one step chemical reduction and characterized by means of X-ray diffraction(XRD) and scanning electron microscopy(SEM). A new electrochemical sensor was then fabricated by coating Cu2O/nitrogen-doped graphene nanocomposite with Nafion on glassy carbon electrode(Cu2O/NG/Nafion/GCE). The electrochemical response of this modified electrode toward ofloxacin was examined by cyclic voltammetry. The results indicate that Cu2O/NG/Nafion composite-modified electrode exhibits higher catalytic activity in the electrochemical oxidation of ofloxacin compared with glassy carbon electrode(GCE), Cu2O/Nafion modified electrode(Cu2O/Nafion/GCE), and N-doped graphene/Nafion modified electrode(NG/Nafion/GCE). Under optimal conditions, the peak current was found to be linearly proportional to the concentration of ofloxacin in the 0.5-27.5 mu mol/L and 27.5-280 mu mol/L ranges with a lower detection limit of 0.34 mu mol/L, higher sensitivity of 39.32 mu A.L.mmol(-1) and a shorter reaction time of less than 2 s. In addition, Nafion can enhance the stability of the modified electrode and prevent some negative species. Thus the modified electrode exhibits good selectivity and a long working life. The Cu2O/NG/Nafion composite modified electrode shows promising application in electrochemical sensors, biosensors, and other related fields because of its excellent properties.
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