基于Au的电化学传感particle@SiO2@CQDs纳米复合材料

IF 2.2 4区 工程技术 Q2 Chemistry
Huiqin Li, Lihua Wu, Hui Lei, Cui Deng, Fan Huang, Lijun Ren, Hongge Zhang, Weiwei Zhao, Qian Zhao
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引用次数: 0

摘要

本研究首先采用水热法合成了碳量子点(CQDs),Au@SiO2采用逐层组装的方法合成了核壳纳米材料。CQDs吸附在Au@SiO2纳米颗粒通过自组装形成Au@SiO2/CQDs纳米复合材料。利用透射电子显微镜和X射线衍射对纳米复合材料的尺寸、形状、元素组成和结构进行了表征;利用紫外-可见吸收光谱和荧光光谱对纳米复合材料的光学性能进行了分析。结果表明:Au@SiO2/CQD纳米材料具有良好形貌的核壳结构,并表现出优异的发光特性。利用电化学方法对纳米复合材料的电化学性能进行了表征,并构建了用于过氧化氢灵敏检测的过氧化氢传感器,从而实现了对低至0.2mM水平的过氧化氢的快速灵敏检测Au@SiO2/CQDs在过氧化氢的检测中表现出良好的选择性和稳定性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Electrochemical sensing based on Au particle@SiO2@CQDs nanocomposites

Electrochemical sensing based on Au particle@SiO2@CQDs nanocomposites

In this study, carbon quantum dots (CQDs) were first synthesized using a hydrothermal method, and then, Au@SiO2 core-shell nanomaterials were synthesized using layer-by-layer assembly. CQDs were adsorbed on the surface of Au@SiO2 nanoparticles through self-assembly to form Au@SiO2/CQDs nanocomposite materials. Transmission electron microscopy and X-ray diffraction were used to characterize the size, shape, element composition, and structure of nanocomposites; ultraviolet-visible absorption spectroscopy and fluorescence spectroscopy were used to analyze the optical properties of nanocomposites. The results show that Au@SiO2/CQD nanomaterials have a core-shell structure with good morphology and exhibit excellent luminescence characteristics. The electrochemical performance of nanocomposites was characterized using electrochemical means, and a hydrogen peroxide sensor was constructed for the sensitive detection of hydrogen peroxide, thus realizing the rapid and sensitive detection of hydrogen peroxide at levels as low as 0.2 mM. The electrode GCE modified with Au@SiO2/CQDs exhibits good selectivity and stability in the detection of hydrogen peroxide.

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来源期刊
Gold Bulletin
Gold Bulletin 工程技术-材料科学:综合
CiteScore
3.30
自引率
4.50%
发文量
0
审稿时长
3 months
期刊介绍: Gold Bulletin is the premier international peer reviewed journal on the latest science, technology and applications of gold. It includes papers on the latest research advances, state-of-the-art reviews, conference reports, book reviews and highlights of patents and scientific literature. Gold Bulletin does not publish manuscripts covering the snthesis of Gold nanoparticles in the presence of plant extracts or other nature-derived extracts. Gold Bulletin has been published over 40 years as a multidisciplinary journal read by chemists, physicists, engineers, metallurgists, materials scientists, biotechnologists, surface scientists, and nanotechnologists amongst others, both within industry and academia. Gold Bulletin is published in Association with the World Gold Council.
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