Browsing by Author "Shafaei, Sepideh"

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Electrodeposition of Cerium Oxide Nanoparticles on the Graphenized Carbon Ceramic Electrode (Gcce) for the Sensitive Determination of Isoprenaline in Human Serum by Differential Pulse Voltammetry (Dpv)
(Taylor & Francis inc, 2022) Shafaei, Sepideh; Akbari Nakhjavani, Sattar; Kanberoglu, Gulsah Saydan; Khalilzadeh, Balal; Mohammad-Rezaei, Rahim
Cerium oxide nanoparticles (CeO2) are widely used as the electrocatalyst in solar cells, fuel cells, water splitting, and electroanalytical experiments. Therefore, controlled electrodeposition of CeO2 on the surface of electrodes may improve the performance of electrochemical devices. CeO2 was electrochemically deposited on the surface of a graphenized carbon ceramic electrode (GCCE) for the determination of isoprenaline in biological samples. The pH, temperature, deposition time, and applied potential were optimized for the electrodeposition. According to differential pulse voltammetry, the linear range, detection limit, and sensitivity of the designed assay were from 5 to 310 nM, 3.03 nM and 25.21 x 10(-5 )mu A mu M(-1 )cm(-2), respectively. Easy preparation, low cost, and high production repeatability of the developed CeO2/GCCE suggest further applications. The prepared modified electrode was successfully utilized for the determination of isoprenaline in human serum with satisfactory results.
Preparation of Cerium Oxide-Mwcnts Nanocomposite Bulk Modified Carbon Ceramic Electrode: a Sensitive Sensor for Tamoxifen Determination in Human Serum Samples
(Springer, 2021) Shafaei, Sepideh; Hosseinzadeh, Elyas; Kanberoglu, Gulsah Saydan; Khalilzadeh, Balal; Mohammad-Rezaei, Rahim
In this study, cerium oxide and multi-walled carbon nanotubes nanocomposite were incorporated into the carbon ceramic electrode (CeO2-MWCNTs/CCE) as a renewable electrode for the electrocatalytic purposes. To demonstrate capability of the fabricated electrode, determination of tamoxifen as an important anticancer drug with differential pulse voltammetry technique was evaluated in details. Linear range, limit of detection and sensitivity of the developed sensor were found to be 0.2-40 nM, 0.132 nM and 1.478 mu A nM(-1) cm(-2), respectively. Ease of production, low cost and high electron transfer rate of the CeO2-MWCNTs/CCE promises it as a novel electro-analytical tool for determination of important species in real samples.