Microwave-assisted synthesis of nitrogen and boron co-doped graphene and its application for enhanced electrochemical detection of hydrogen peroxide
Microwave-assisted synthesis of nitrogen and boron co-doped graphene and its application for enhanced electrochemical detection of hydrogen peroxide
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DOI：
10.1039/c3ra44284e
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发表时间：
2013-10
期刊：
影响因子：
3.9
通讯作者：
Guohai Yang;Yu-hui Zhou;Jia-Jun Wu;Juntao Cao;Lingling Li;Hongying Liu;Jun‐Jie Zhu
中科院分区：
文献类型：
--
作者：
Guohai Yang;Yu-hui Zhou;Jia-Jun Wu;Juntao Cao;Lingling Li;Hongying Liu;Jun‐Jie Zhu
采用微波辅助合成了具有分级结构的氮、硼共掺石墨烯(Nb-G)，并用透射电子显微镜、扫描电子显微镜、X射线光电子能谱和拉曼光谱对其进行了表征。所生成的NB-G网络提供了多维电子传递途径，并用于过氧化氢(H_2O_2)的电催化还原传感，表现出良好的响应和稳定性。在信噪比为3的情况下，Nb-G修饰的电化学传感器的线性范围为0.5μM~5 mm，检测下限为0.0 5μM。这一高性能既归功于Nb-G的有利结构，也归功于N和B在石墨烯中的共掺杂所产生的协同效应。该生物传感器还可以在纳米分子水平上实现对活细胞中过氧化氢的实时定量检测，表现出良好的电化学活性。
A microwave-assisted strategy was developed for the synthesis of nitrogen and boron co-doped graphene (NB-G) with a hierarchical framework, and the NB-G was characterized by transmission electron microscopy, scanning electron microscopy, X-ray photoelectron spectroscopy and Raman spectroscopy. The resultant NB-G network provided multidimensional electron transport pathways, and was used in the electrocatalytic reduction for hydrogen peroxide (H2O2) sensing, exhibiting an excellent response and stability. The NB-G modified electrochemical sensor showed a linear range from 0.5 μM to 5 mM with a detection limit of 0.05 μM at a signal-to-noise ratio of 3. This high performance was attributed to both the beneficial structure of NB-G and synergetic effects arising from the co-doping of N and B in graphene. The proposed biosensor was also used to achieve real-time quantitative detection of H2O2 from living cells at the nanomolar level, which exhibited excellent electrochemical activity.