Cadmium oxide based efficient electrocatalyst for hydrogen peroxide sensing and water oxidation

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• 作者：Alaud Din ; Sher Bahadar Khan ; M. I. Khan…
• 刊名：Journal of Materials Science: Materials in Electronics
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：28
• 期：1
• 页码：1092-1100
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Optical and Electronic Materials; Characterization and Evaluation of Materials;
• 出版者：Springer US
• ISSN：1573-482X
• 卷排序：28

文摘

In this study, plant-mediated synthesis of cadmium oxide nanoparticles (CdO NPs) have been reported using hydrazine as reducing agent and aqueous extract of Convolvulus arvensis as capping ligand. The synthesized nanomaterial was characterized by using different techniques like UV–visible, FT-IR, FESEM, XRD, EDS and TGA. FESEM image showed the average crystallite size to be 23 ± 2 nm. TGA was carried out for thermal stability which showed that the synthesized nanoparticles were stable up to 365 °C. The electro-catalytic properties of synthesized nanomaterials were investigated for the oxidation of H₂O₂ and H₂O. The response of the physically modified electrode was examined using cyclic voltammetry and DC potential amperometry (DCPA vs. Ag/AgCl reference electrode) in a phosphate buffer (pH = 7.0). The designed H₂O₂ biosensor illustrated high sensitivity 4.9757 μA mM−1 cm−2, wide linear calibration range from 1 to 30 mM and detection limit of 1.6172 mM. The nanoparticles also displayed high electrocatalytic properties for the oxidation of water using linear sweep voltammetry.