Preparation of Gd-doped Ceria Nanomaterial and Its Electrochemical Application

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Preparation of Gd-doped Ceria Nanomaterial and Its Electrochemical Application

更新时间：2023-05-18

- Preparation of Gd-doped Ceria Nanomaterial and Its Electrochemical Application
- Vol. 34, Issue 2, Pages: 153-158(2015)
- 作者机构：
  
  1. 沈阳化工大学应用化学学院
  2. 沈阳橡胶研究设计院
- 作者简介：
- 基金信息：
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Preparation of Gd-doped Ceria Nanomaterial and Its Electrochemical Application. [J]. 34(2):153-158(2015)
DOI：

Preparation of Gd-doped Ceria Nanomaterial and Its Electrochemical Application. [J]. 34(2):153-158(2015) DOI：

摘要

采用水热合成法制备了Ce1-xGdxO（4-x)/2系列纳米复合材料，应用X射线光电子能谱（XPS）、扫描电镜（SEM）、透射电镜（TEM）和X射线光谱仪（XRD）对纳米粉体进行表征。结果表明该产物为棒状材料，直径约为20 nm，表现为典型CeO2的立方萤石结构，由XPS结果可见Gd完全掺杂到氧化铈中。将上述材料与壳聚糖混合修饰于玻碳电极表面，构建了一个新型的纳米复合材料无酶传感器。采用循环伏安法和I~t曲线法对该传感器的电化学行为进行研究。结果表明，Ce0.9Gd0.1O1.95-CHIT/GCE修饰电极表现出较灵敏的电化学响应。在最佳实验条件下，修饰电极对H2O2测定的线性范围为1.0×10-5~1.1×10-2 mol/L，检出限（S/N=3）为1.7×10-6 mol/L。该传感器制备简单、成本低，灵敏度虽然不理想，但为复合纳米材料在电化学领域中的应用开辟了新的思路。

Abstract

An enzyme-free electrochemical sensor for the detection of hydrogen peroxide was developed using a nano-composite（Ce1-xGdxO（4-x）/2） modified electrode.The nano-composites were synthesized by hydrothermal method and characeterized by X-ray photoelectron spectroscopy（XPS），scanning electron microscope（SEM），transmission electron microscope（TEM） and X-ray diffractometer（XRD）.The nanocomposites show the typical CeO2 cubic fluorite structure，and the diameter of the composite is about 20 nm.A novel nanoscale hybrid materials nonenzymatic sensor was constructed by immobilizing Ce1-xGdxO（4-x）/2 and chitosan onto glassy carbon electrode（GCE）.The modified electrode was investigated by cyclic voltammetry（CV） and chronoamperometry（I-t）.Under the optimized conditions，the sensor showed a wide dynamic range for the detection of hydrogen peroxide，which catalytic current was linear with hydrogen peroxide concentration in the range of 1.0×10-5-1.1×10-2 mol/L with a detection limit（S/N=3） of 1.7×10-6 mol/L.The sensor is not good enough in sensitivity，but it might have potential applications in the fabrication of nonenzymatic sensor.

关键词

Ce1-xGdxO（4-x）/2纳米复合材料水热法修饰电极H2O2无酶传感器

Keywords

nanocomposite of Ce1-xGdxO（4-x）/2hydrothermal synthesismodified electrodehydrogen peroxidenonenzymatic sensor

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Related Institution

College of Chemistry and Chemical Engineering，Yan’an University，Yan’an

Shaanxi Key Laboratory of Chemical Reaction Engineering，Yan’an

School of Chemical Engineering， Guizhou Minzu University

Guangxi Liuzhou Luosifen Research Center of Engineering Technology， Guangxi Key Laboratory of Green Processing of Sugar Resources， College of Biological and Chemical Engineering， Guangxi University of Science and Technology

Liuzhou Institutes for Food and Drug Control

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