Development of cerium oxide on rGO: For antioxidant, dye removal, cyclic voltammetry and green sensor studies

Sustainable Chemistry for the Environment Pub Date : 2024-08-15 DOI:10.1016/j.scenv.2024.100147

M. Mylarappa , S. Chandruvasan , K.S. Harisha , G. Krishnamurthy

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Abstract

Cerium oxide (CeO₂) was produced using the reflux process and then deposited on reduced graphene oxide (rGO). The CeO₂/rGO was confirmed by X-ray diffraction, Fourier transform infrared, UV–visible, scanning electron microscopy, and XPS techniques. When malachite green (MG) photodegradation was investigated, first-order kinetics revealed that MG could degraded up to 84 % in 120 min. The nanocomposite's anti-oxidative characteristics were examined against 2,2-diphenyl-1picrylhydrazyl (DPPH) radicals, and the IC₅₀ value of 356.763 mg/µL was evaluated, suggesting a 94 % efficiency rate. Tartaric acid and grape juice's electrochemical characteristics and sensing capacities were assessed using differential pulse voltammetry (DPV) and cyclic voltammetry (CV). Measurements show that grape juice and tartaric acid had detection limits of 13.2 μM and 32 μM, respectively.

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在 rGO 上开发氧化铈：用于抗氧化、染料去除、循环伏安法和绿色传感器研究

利用回流工艺制备了氧化铈（CeO2），然后将其沉积在还原氧化石墨烯（rGO）上。通过 X 射线衍射、傅立叶变换红外、紫外可见光、扫描电子显微镜和 XPS 技术确认了 CeO2/rGO。在研究孔雀石绿（MG）的光降解时，一阶动力学显示孔雀石绿在 120 分钟内的降解率可达 84%。研究还考察了纳米复合材料对 2,2-二苯基-1-吡啶肼（DPPH）自由基的抗氧化特性，IC50 值为 356.763 mg/µL，表明有效率为 94%。使用差分脉冲伏安法（DPV）和循环伏安法（CV）评估了酒石酸和葡萄汁的电化学特性和传感能力。测量结果表明，葡萄汁和酒石酸的检测限分别为 13.2 μM 和 32 μM。

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Sustainable Chemistry for the Environment

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0.40

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