A novel Co9S8 nanocage was fabricated via a metalorganic frameworks engaged strategy. The morphology and structure of the resulting Co9S8 nanocage were carefully confirmed by scanning electron microscopy, powder X-ray diffraction, transmission electron microscope, and X-ray photoelectron spectroscopy. Then the as-synthesized Co9S8 nanocage material was immobilized on a glassy carbon electrode (GCE) and served as an efficient sensing platform for determination of luteolin. Under optimized conditions, the prepared Co9S8/GCE shows significant electrocatalytic activity toward the oxidation of luteolin. By comparison with GCE and CoS/GCE, the proposed Co9S8/GCE results in great improvement in the electrochemical response of luteolin. Meanwhile, the Co9S8 based-sensor presents an excellent linear relationship with the concentration of luteolin ranging from 0.01 to 20 μM. Then, the limit of detection based on S/N = 3 was estimated to be 0.8 nM. In addition, the Co9S8/GCE displays good repeatability, reproducibility, and selectivity. Finally, the simplicity and low cost of this sensor makes it possible to determination luteolin in actual sample with good accuracy and precision.
In this paper, a novel type of zeolitic imidazolate framework-8 (ZIF-8) polyhedrons/multi-walled carbon nanotubes (MWCNTs) modified electrode was successfully preparedfor effective on-site detection rutin. The morphology and microstructureof ZIF-8/MWCNTs nanocomposite...
Polyacrylonitrile (PAN) and (CH3COO)2Zn were used as raw materials, and carbon nanofibers (CNFs) with high specific surface area were successfully prepared by an electrospinning method. A new method of electrochemiluminescence detection of azithromycin was established by modifying the glassy carbon electrode (GCE). Under the optimal conditions, the electrochemical behavior and electrochemiluminescence behavior of the Ru(bpy)32+-AZM system on the modified electrode were investigated. Owing to the large specific area, more active sites, and promotion of electron transfer, the sensor exhibits high electrocatalytic activity, high sensitivity, a good linear relationship ranging from
8.0
×
10
−
8
to
1.0
×
10
−
4
mol/L, and a low detection limit (
6.52
×
10
−
8
mol/L). In addition, the good recoveries indicate that the sensor was a promising device for the detection of azithromycin in real samples.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.