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Hierarchical Core–Shell Structure of 2D VS2@VC@N-Doped Carbon Sheets Decorated by Ultrafine Pd Nanoparticles: Assembled in a 3D Rosette-like Array on Carbon Fiber Microelectrode for Electrochemical Sensing
journal contribution
posted on 2020-03-10, 18:24 authored by Hao Yuan, Jianquan Zhao, Qijun Wang, Devaraj Manoj, Anshun Zhao, Kai Chi, Jinghua Ren, Wenshan He, Yan Zhang, Yimin Sun, Fei Xiao, Shuai WangThe
development of two-dimensional (2D) nanohybrid materials with
heterogeneous components in nanoscale and three-dimensional (3D) well-ordered
assembly in microscale has been regarded as an effective way to improve
their overall performances by the synergistic coupling of the optimized
structure and composition. In this work, we reported the design and
synthesis of a new type of hierarchically core–shell structure
of 2D VS2@VC@N-doped carbon (NC) sheets decorated by ultrafine
Pd nanoparticles (PdNPs), which were vertically grown on carbon fiber
(CF) and assembled into a unique 3D rosette-like array. The resultant
VS2@VC@NC-PdNPs modified CF microelectrode integrated the
structural and electrochemical properties of the heterogeneous hybridization
of core–shell VS2@VC@NC-PdNPs sheets with a unique
rosette-like array structure, and gave rise to a significant improvement
in terms of electron transfer ability, electrocatalytic activity,
stability, and biocompatibility. Under the optimized conditions, the
VS2@VC@NC-PdNPs modified CF microelectrode demonstrated
excellent electrochemical sensing performance towards biomarker hydrogen
peroxide (H2O2) including a high sensitivity
of 152.7 μA cm–2 mM–1, a
low detection limit of 50 nM (a signal-to-noise ratio of 3:1), as
well as good reproducibility and anti-interference ability, which
could be used for the real-time in situ electrochemical detection
of H2O2 in live cancer cells and cancer tissue.
The remarkable performances of the proposed nanohybrid microelectrode
will have a profound impact on the design of diverse 2D layered materials
as a promising candidate for electrochemical biosensing applications.
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Keywords
electrochemical biosensing applicationsdetectionUltrafine Pd Nanoparticlesmaterialcorebiomarker hydrogen peroxideCF microelectrodeCarbon Fiber Microelectrodeultrafine Pd nanoparticlesNCnanohybridVS 23 D Rosette-like Arrayelectron transfer abilityrosette-like array structureH 2 O 2performanceVC2 D VS 2optimized3 D rosette-like array