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Simple pyrolysis of graphene-wrapped PtNi nanoparticles supported on hierarchically N-doped porous carbon for sensitive detection of carbendazim

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Abstract

A novel electrochemical sensor was established based on graphene-wrapped PtNi nanoparticles supported on three-dimensional (3D) N-doped porous carbon (G-PtNi/3D-NPC) for the highly sensitive and selective detection of carbendazim (CBZ). In this sensing system, the encapsulation of PtNi nanoparticles (NPs) by graphene can effectively prevent the aggregation tendency and enhance the structural stability. The hierarchically porous nanostructures have a large specific surface area to expose a large number of active sites and the resulting enhanced electrical conductivity ultimate improves the electrocatalytic activity towards CBZ. Under the optimal conditions, the prepared sensor showed excellent electrochemical responses for the determination of CBZ with a linear range of 0.5–30 μM and lower limit of detection (LOD) of 0.04 μM (S/N = 3). It also shows excellent anti-interference ability at a working potential of 0.74 V. The feasibility of the senor is demonstrated for its practical assays in diluted peach and vegetable samples with acceptable recovery (95.8–97.3 %, peach; 97.2–97.6 %, vegetable) and a relative standard deviation (RSD) below 2.3%.

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Acknowledgements

This research was supported by the Zhejiang Public Welfare Technology Application Research Project (LGG19B050001).

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  1. Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, College of Chemistry and Materials Science, College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua, 321004, China

    Li Yang, Yao-Ping Zhu, Ai-Jun Wang, Xuexiang Weng & Jiu-Ju Feng

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  1. Li Yang
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Highlights

► The G-PtNi/3D-NPC was fabricated by the high-temperature calcination.

► The combination of graphene and PtNi NPs displays favorable synergetic effects.

► A highly sensitive and selective sensor for CBZ was constructed based on G-PtNi/3D-NPC.

► The method had great practicality for the detection of CBZ in environmental samples.

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Figures S1–S2, Tables S1–S2 (DOCX 349 KB)

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Yang, L., Zhu, YP., Wang, AJ. et al. Simple pyrolysis of graphene-wrapped PtNi nanoparticles supported on hierarchically N-doped porous carbon for sensitive detection of carbendazim. Microchim Acta 190, 211 (2023). https://doi.org/10.1007/s00604-023-05759-2

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