مشخصات پژوهش

صفحه نخست /A Highly Sensitive and ...
عنوان
A Highly Sensitive and Selective Electrochemical Mercury (II) Sensor Based on Nanoparticles of Hg(II)-imprinted Polymer and Graphitic Carbon Nitride (g-C3N4)
نوع پژوهش مقاله چاپ شده
کلیدواژه‌ها
Mercury ion, ion-imprinted polymers, Nanoparticles, Graphitic carbon nitride (g-C3N4), Electrochemical sensor, Square wave voltammetry
چکیده
Using nanoparticles of an ion imprinted polymer an electrochemical sensor was designed for mercury(II) ions. Nanoparticles of the Hg(II)-imprinted polymers were formed using a functional monomer (itaconic acid) through the precipitation polymerization approach. These particles were characterized using FT-IR, TGA and SEM. The particles together with graphitic carbon nitride (g-C3N4) were then used to modify a carbon paste electrode (CPE) and the modified electrode was used for the analysis of Hg(II).The analysis method involved a first step of includes accumulating Hg(II) on the modified electrode under open circuit conditions, followed by is a second step of reducing of the mercury(II) ions to Hg under a negative pre-potential, and a final third step of generating the electrochemical signal through a square wave anodic stripping voltammetry (SWASV) routine. The obtained results were compared with those of an unmodified CPE, and it was found that the modified CPE has a higher tendency for Hg(II) ions. The effect of the presence of g-C3N4was also evaluated. The modified electrode was found to have a suitable linear response from 0.06 to 25.0 nM, and a lower detection limit (S/N=3) of 18 pM under optimal conditions and its performance was also checked for the analysis of Hg(II) in water samples.
پژوهشگران محمدرضا گنجعلی (نفر اول)، علیرضا رحمانی (نفر دوم)، رضا شکوهی (نفر سوم)، عباس فرمانی (نفر چهارم)، محمد خزائی (هیئت علمی) (نفر پنجم)