A facile one-pot synthesis of carbon nitride dots-reduced graphene oxide nanocomposites for simultaneous enhanced detecting of dopamine and uric acid.
A facile one-pot synthesis of carbon nitride dots-reduced graphene oxide nanocomposites for simultaneous enhanced detecting of dopamine and uric acid.
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DOI：
10.1039/c6an00640j
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发表时间：
2016-07
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影响因子：
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通讯作者：
Ziyin Yang;Xiaohui Zheng;Zhi Li;Jianbin Zheng
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文献类型：
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作者：
Ziyin Yang;Xiaohui Zheng;Zhi Li;Jianbin Zheng
在这项研究中，我们描述了氮化碳点还原氧化石墨烯纳米复合物（CNDs-rGO）的简易合成及其应用于多巴胺（DA）和尿酸（UA）的增强电化学测定。首次采用绿色、简便的一步法合成了CNDs-rGO，该方法是在不引入其他还原剂或表面改性剂的情况下，通过水热处理含有GO和壳聚糖的水溶液来进行的。采用透射电子显微镜（TEM）、拉曼光谱、X射线光电子能谱和傅里叶变换红外光谱对纳米复合材料的形貌和组成进行了表征。TEM观察显示，CND的大小约为5.0 nm的均匀和密集地分布在rGO的表面。电化学研究表明CNDs-rGO纳米复合材料对DA和UA表现出优异的性能。DA的线性范围估计为80 nM至227 μM，灵敏度为154.3 μA mM（-1）cm（-2），检测下限为0.03 μM。UA的线性范围为80 nM ~ 328 μM，灵敏度为178.1 μA mM（-1）cm（-2），检测限为0.05 μM。因此，CNDs-rGO纳米复合材料在构建DA和UA检测电化学传感器方面显示出巨大的应用潜力。
In this study, we described the facile synthesis of carbon nitride dots-reduced graphene oxide nanocomposites (CNDs-rGO) and their application for the enhanced electrochemical determination of dopamine (DA) and uric acid (UA). CNDs-rGO were synthesized for the first time through a green and facile one-step approach, carried out by hydrothermal heat-treatment of an aqueous solution containing GO and chitosan without introduction of other reducing agents or surface modifier. Then, the morphology and composition of CNDs-rGO nanocomposites were characterized by transmission electron microscopy (TEM), Raman spectroscopy, X-ray photoelectron spectroscopy and Fourier transform infrared spectroscopy. TEM observations revealed that CNDs with a size of about 5.0 nm were homogeneously and densely distributed on the surface of rGO. Electrochemical investigations indicated that CNDs-rGO nanocomposites exhibited an excellent performance toward DA and UA. The linear range for DA was estimated to be from 80 nM to 227 μM with a sensitivity of 154.3 μA mM(-1) cm(-2) and a low detection limit of 0.03 μM. Meanwhile, the linear range for UA was estimated to be from 80 nM to 328 μM with a high sensitivity of 178.1 μA mM(-1) cm(-2) and a low detection limit of 0.05 μM. Therefore, CNDs-rGO nanocomposites showed great application potential for constructing electrochemical sensors for the detection of DA and UA.