Synthesis of Ag@SiO2 yolk–shell nanoparticles for hydrogen peroxide detection

Chao Liu; Jiansheng Li; Jing Wang; Junwen Qi; Wenhong Fan; Jinyou Shen; Xiuyun Sun; Weiqing Han; Lianjun Wang

doi:10.1039/C4RA16061D

Synthesis of Ag@SiO₂ yolk–shell nanoparticles for hydrogen peroxide detection†

Chao Liu,^a Jiansheng Li,*^a Jing Wang,^a Junwen Qi,^a Wenhong Fan,^b Jinyou Shen,^a Xiuyun Sun,^a Weiqing Han^a and Lianjun Wang*^a

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* Corresponding authors

^a Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
E-mail: lijsh@mail.njust.edu.cn, wanglj@mail.njust.edu.cn
Fax: +86 25 84315941
Tel: +86 25 84303216

^b Department of Environmental Science and Engineering, School of Chemistry and Environment, Beihang University, Beijing 100191, China

Abstract

Yolk–shell nanostructures are a potential platform for the application of sensors and detection. In this paper, Ag@SiO₂ yolk–shell nanoparticles (YSNs) were synthesized by a facile “two solvents” impregnation–reduction approach. XRD, SEM, TEM and N₂ adsorption characterization results revealed that the resultant Ag@SiO₂ YSNs possess distinctive structures, such as movable cores, perpendicular mesoporous channels, protective shells and hollow cavities. A nonenzymatic H₂O₂ sensor was constructed using Ag@SiO₂ YSNs as sensing interface. A three-electrode system was used for the measurement. Electrochemical results indicate that the Ag@SiO₂ YSNs modified electrode exhibits outstanding performance toward the H₂O₂ reduction, with a faster amperometric response, a lower detection limit (3.5 μM) and a wider linear range (0.1–15 mM) than that based on Ag@SiO₂ composites, which was synthesized by a direct impregnation method.

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DOI: https://doi.org/10.1039/C4RA16061D
Article type: Paper
Submitted: 09 Dec 2014
Accepted: 02 Feb 2015
First published: 02 Feb 2015

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RSC Adv., 2015,5, 17372-17378

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Synthesis of Ag@SiO₂ yolk–shell nanoparticles for hydrogen peroxide detection

C. Liu, J. Li, J. Wang, J. Qi, W. Fan, J. Shen, X. Sun, W. Han and L. Wang, RSC Adv., 2015, 5, 17372 DOI: 10.1039/C4RA16061D

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Synthesis of Ag@SiO₂ yolk–shell nanoparticles for hydrogen peroxide detection†

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Synthesis of Ag@SiO₂ yolk–shell nanoparticles for hydrogen peroxide detection

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