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基于磁性核壳FeO@C/Au纳米粒子纳米复合材料的新型非酶过氧化氢传感器。

A Novel Nonenzymatic Hydrogen Peroxide Sensor Based on Magnetic Core-Shell FeO@C/Au Nanoparticle Nanocomposite.

作者信息

Ni Xiao, Tian Mingwei, Sun Jun, Chen Xiaojun

机构信息

College of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211800, China.

出版信息

Int J Anal Chem. 2021 Mar 8;2021:8839895. doi: 10.1155/2021/8839895. eCollection 2021.

DOI:10.1155/2021/8839895
PMID:33747085
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7960058/
Abstract

FeO@C/Au nanoparticle (AuNP) nanocomposites were prepared through electrostatic adsorption of AuNPs onto PDDA-functionalized core/shell FeO@C magnetic nanospheres, which had been synthesized by a facile solvothermal method. The morphology and composition of the nanocomposites were characterized by transmission electron microscopy (TEM), scanning electron microscopy (SEM), Fourier transform infrared (FT-IR), etc. Moreover, highly electrocatalytic activity to the reduction of hydrogen peroxide (HO) was also exhibited on the FeO@C/AuNP-modified indium tin oxide (ITO) electrode. The effect of solution pH and the modification amount of FeO@C/AuNPs on the performance of electrocatalytic HO reduction was investigated. Under the optimal conditions, the catalytic current showed a linear relationship with the increase of HO concentration in the range of 0.007-15 mM and a detection limit of 5 M. The HO sensor showed high selectivity for HO detection, which could effectively resist the interference of ascorbic acid (AA), uric acid (UA), and citric acid (CA). Finally, the HO sensor was used in the real fetal bovine serum to detect HO and obtained satisfactory results with the recovery values ranging from 95.14 to 103.6%.

摘要

通过将金纳米粒子（AuNP）静电吸附到聚二烯丙基二甲基氯化铵（PDDA）功能化的核壳结构FeO@C磁性纳米球上，制备了FeO@C/Au纳米粒子（AuNP）纳米复合材料，该磁性纳米球采用简便的溶剂热法合成。通过透射电子显微镜（TEM）、扫描电子显微镜（SEM）、傅里叶变换红外光谱（FT-IR）等对纳米复合材料的形貌和组成进行了表征。此外，FeO@C/AuNP修饰的氧化铟锡（ITO）电极对过氧化氢（HO）的还原也表现出高电催化活性。研究了溶液pH值和FeO@C/AuNPs修饰量对电催化HO还原性能的影响。在最佳条件下，催化电流在0.007-15 mM范围内与HO浓度的增加呈线性关系，检测限为5 μM。该HO传感器对HO检测具有高选择性，能有效抵抗抗坏血酸（AA）、尿酸（UA）和柠檬酸（CA）的干扰。最后，将该HO传感器用于实际胎牛血清中HO的检测，回收率在95.14%至103.6%之间，结果令人满意。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/52ef/7960058/b068e8194e4f/IJAC2021-8839895.008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/52ef/7960058/8fb96bb69dc6/IJAC2021-8839895.001.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/52ef/7960058/f6e0dbbfdc88/IJAC2021-8839895.007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/52ef/7960058/b068e8194e4f/IJAC2021-8839895.008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/52ef/7960058/8fb96bb69dc6/IJAC2021-8839895.001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/52ef/7960058/189e452133a0/IJAC2021-8839895.002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/52ef/7960058/906f1bf0f00f/IJAC2021-8839895.003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/52ef/7960058/868a60f3e49d/IJAC2021-8839895.004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/52ef/7960058/014eadc82ead/IJAC2021-8839895.005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/52ef/7960058/6dc86e6db663/IJAC2021-8839895.006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/52ef/7960058/f6e0dbbfdc88/IJAC2021-8839895.007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/52ef/7960058/b068e8194e4f/IJAC2021-8839895.008.jpg

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