Multifunctional RGO-Gd2O3:Eu3+ nanocomposites for supercapacitor and biosensor application

IF 4.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Chemistry and Physics Pub Date : 2024-11-05 DOI:10.1016/j.matchemphys.2024.130128

Nandini Robin Nadar , J. Deepak , S.C. Sharma , B.R. Radha Krushna , H. Nagabhushana , Augustine George , Pushparaj Samantsinghar , A. Banu , D.G. Anand

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Abstract

This study successfully synthesized pristine RGO-Gd₂O₃:Eu³⁺ nanocomposites (NCs) using a hydrothermal method, as confirmed by X-ray diffraction and TEM analysis. Cyclic voltammetry (CV) demonstrated that RGO-Gd₂O₃:Eu³⁺ NCs exhibited a superior specific capacitance (Csp) of 340 Fg⁻¹ at a scan rate of 2 mV s⁻¹. Impressively, the synthesized nanocomposites displayed high energy and power densities of 41 Wh/kg and 30000 W/kg, respectively, along with excellent capacity retention (91.12 %) and Coulombic efficiency (95.77 %). Modified glassy carbon electrodes (MGCEs) fabricated using these NCs showed promising electrochemical responses for dopamine (DA) detection at pH∼7. These findings highlight the potential of the developed electrode for both supercapacitor applications and DA sensing.

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用于超级电容器和生物传感器的多功能 RGO-Gd2O3:Eu3+ 纳米复合材料

本研究采用水热法成功合成了原始的 RGO-Gd2O3:Eu3+ 纳米复合材料（NCs），X 射线衍射和 TEM 分析证实了这一点。循环伏安法（CV）表明，在 2 mV s-1 的扫描速率下，RGO-Gd2O3:Eu3+ NCs 的比电容（Csp）高达 340 Fg-1。令人印象深刻的是，合成的纳米复合材料分别显示出 41 Wh/kg 和 30000 W/kg 的高能量和功率密度，以及出色的容量保持率（91.12%）和库仑效率（95.77%）。使用这些 NCs 制成的改性玻璃碳电极（MGCE）在 pH 值为 7 的条件下检测多巴胺（DA）时显示出良好的电化学响应。这些发现凸显了所开发电极在超级电容器应用和多巴胺传感方面的潜力。

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来源期刊

Materials Chemistry and Physics 工程技术-材料科学：综合

CiteScore

8.70

自引率

4.30%

发文量

1515

审稿时长

69 days

期刊介绍： Materials Chemistry and Physics is devoted to short communications, full-length research papers and feature articles on interrelationships among structure, properties, processing and performance of materials. The Editors welcome manuscripts on thin films, surface and interface science, materials degradation and reliability, metallurgy, semiconductors and optoelectronic materials, fine ceramics, magnetics, superconductors, specialty polymers, nano-materials and composite materials.