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   modified glassy carbon electrode with mesoporous silica-metformin/multi-walled carbon nanotubes as a biosensor for ethinylestradiol detection  
   
نویسنده nodehi marzieh ,kiasadr abolfazl ,babaee bachevanlo ghasem
منبع materials chemistry horizons - 2022 - دوره : 1 - شماره : 3 - صفحه:219 -230
چکیده    The aim of this study was related to the determination of ethinylestradiol (ee) via electrochemical methods. since the ee determination has approximately been impossible at low concentrations, the glassy carbon electrode (gce) was modified with a mixture of metformin (met), mesoporous silica (sba-15), and multi-walled carbon nanotubes (mwcnt). due to the high existence of the nh2 functional group in met, this material can act as a modifier by creating a chemical bond by adsorption in sba nanoparticles, and it subsequently can measure ee. experimental investigations have shown that the modified electrode has had a repeatable response toward ee evaluation in real samples. moreover, the physicochemical properties of the manufactured electrode were investigated via ft-ir, field-emission scanning electron microscopy (fesem), and transmission electron microscope (tem). also, the electrochemical characteristics were studied through cyclic voltammetry (cv) and differential pulse voltammetry (dpv) methods. the related result has indicated a considerable increment in current intensity. at optimal conditions, the modified electrode demonstrated linear voltammetric responses in the ranges of 0.005-200 µm and a low detection limit of 1.68×10-9 m for ee estimation.
کلیدواژه electrochemical sensor ,ethinylestradiol ,metformin ,multi-walled carbon nanotubes
آدرس hakim sabzevari university, faculty of science, department of chemistry, iran, hakim sabzevari university, faculty of science, department of chemistry, iran, shahid izadi conservatory, iran
پست الکترونیکی g.babaee1401@yahoo.com
 
     
   
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