材料科学
纳米复合材料
石墨烯
抗坏血酸
氧化物
化学工程
循环伏安法
傅里叶变换红外光谱
纳米技术
电化学
电极
冶金
化学
食品科学
工程类
物理化学
作者
Hossein Jafari,Mohammad Reza Ganjali,Amin Shiralizadeh Dezfuli,Farnoush Faridbod
标识
DOI:10.1016/j.apsusc.2017.08.054
摘要
Decoration of reduced graphene oxide (RGO) with nano-size inorganic particles creates a class of composites with considerably improved characteristics. Improvements in the function of electrochemical energy-storage devices, catalysts and sensors using such particles, have hence attracted a great deal of interest to the area. This manuscript tends to report the results of the research on the application of a sonochemical route for anchoring nano-sized Yb2O3 (Ytterbia) particles, on sheets of RGO. The anchoring phenomenon is based on the self-assembly of the Yb2O3 nano-particles under sonochemical treatments in an ultrasonic bath. To evaluate the method, the produced Yb2O3-RGO nanocomposites were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), and field-emission scanning electron microscopy (FE-SEM), which proved the uniform distribution of the nano-particles on the RGO sheets. Additionally, the Yb2O3-RGO nano-composites were evaluated through cyclic voltammetry (CV), to assess the potentials of their application in electrochemical devices. The high activity of the produced Yb2O3-RGO nanocomposites can be attributed to the synergistic effect between Yb2O3 and RGO as well as the porous structure of the nanocomposite. Due to their stability, electrocatalytic properties and large accessible surface area, the low detection limit sensor is usable for long term usages in blood serum and wide linear dynamic range. There are linear relationships between current intensities and concentrations in the region 0.3–800 μM dopamine (DA), and 0.2–210 μM uric acid (UA), and the limits of detection (LOD) (S/N = 3) are down to 0.02 μM and 0.01 μM for DA and UA, respectively in 0.5 mM solution of ascorbic acid.
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