Hierarchical Core-Shell Structure of 2D VS2@VC@N-Doped Carbon Sheets Decorated by Ultrafine Pd Nanoparticles: Assembled in 3D Rosette-like Array on Carbon Fiber Microelectrode for Electrochemical Sensing.
Hierarchical Core-Shell Structure of 2D VS2@VC@N-Doped Carbon Sheets Decorated by Ultrafine Pd Nanoparticles: Assembled in 3D Rosette-like Array on Carbon Fiber Microelectrode for Electrochemical Sensing.
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DOI：
10.1021/acsami.9b21436
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发表时间：
2020-02
影响因子：
9.5
通讯作者：
Hao Yuan;Jianquan Zhao;Qijun Wang;D. Manoj;Anshun Zhao;Kai Chi;Jinghua Ren;Wenshan He;Yan Zhang;Yimin Sun;Fei Xiao;Shuai Wang
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文献类型：
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作者：
Hao Yuan;Jianquan Zhao;Qijun Wang;D. Manoj;Anshun Zhao;Kai Chi;Jinghua Ren;Wenshan He;Yan Zhang;Yimin Sun;Fei Xiao;Shuai Wang
通过优化结构和组分的协同耦合，发展纳米尺度的异质组分二维纳米杂化材料和微米尺度的三维有序组装材料是提高其综合性能的有效途径。在这项工作中，我们报道了一种新型的分层核-壳结构的二维VS2@VC@N掺杂的碳（NC）片的设计和合成的超细Pd纳米粒子（PdNPs），这是垂直生长在碳纤维（CF）和组装成一个独特的三维玫瑰花状阵列。结果表明，VS 2 @VC@NC-PdNPs修饰的CF微电极具有独特的玫瑰花状阵列结构，其结构和电化学性能得到了很好的结合，在电子传递能力、电催化活性、稳定性和生物相容性等方面都有了显著的提高。在优化的条件下，VS 2 @VC@NC-PdNPs修饰的CF微电极对生物标志物过氧化氢（H2 O2）表现出优异的电化学传感性能，包括152.7 μA cm-2 mM-1的高灵敏度、50 nM的低检测限（信噪比为3：1）以及良好的重现性和抗干扰能力，可用于活癌细胞和癌组织中H2 O2的实时原位电化学检测。所提出的纳米混合微电极的显着性能将产生深远的影响，设计不同的二维层状材料作为电化学生物传感应用的有前途的候选人。
The development of two-dimension (2D) nanohybrid materials with heterogeneous component in nanoscale and three-dimension (3D) well-ordered assembly in microscale has been regarded as an effective way to improve their overall performances by 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 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 high sensitivity of 152.7 μA cm-2 mM-1, 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 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 promising candidate for electrochemical biosensing applications.