One‐Step Synthesis of β‐Cyclodextrin Functionalized Graphene/Ag Nanocomposite and Its Application in Sensitive Determination of 4‐Nitrophenol
One‐Step Synthesis of β‐Cyclodextrin Functionalized Graphene/Ag Nanocomposite and Its Application in Sensitive Determination of 4‐Nitrophenol
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DOI：
10.1002/elan.201300227
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发表时间：
2013-10
期刊：
影响因子：
3
通讯作者：
Weilu Liu;Cong Li;Yue Gu;L. Tang;Zhiquan Zhang;Ming Yang
中科院分区：
文献类型：
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作者：
Weilu Liu;Cong Li;Yue Gu;L. Tang;Zhiquan Zhang;Ming Yang
以氧化石墨烯和硝酸银为原料，采用微波一步法制备了β-环糊精功能化石墨烯/银纳米复合材料（β-CD/GN/Ag）。采用β-CD/GN/Ag作为增敏元件，测定了对硝基苯酚。对硝基苯酚在1.0×10−8-1.0×10−7 mol/L和1.0×10−7-1.5×10−3 mol/L范围内与其浓度呈良好的线性关系，检出限为8.9×10−10 mol/L（S/N=3）。根据旋转圆盘电极实验，探讨了对硝基苯酚还原的机理和非均相电子转移动力学。并将该传感平台应用于真实的样品中4-硝基苯酚的测定。
β-Cyclodextrin functionalized graphene/Ag nanocomposite (β-CD/GN/Ag) was prepared via a one-step microwave treatment of a mixture of graphene oxide and AgNO3. β-CD/GN/Ag was employed as an enhanced element for the sensitive determination of 4-nitrophenol. A wide linear response to 4-nitrophenol in the concentration ranges of 1.0×10−8–1.0×10−7 mol/L, and 1.0×10−7–1.5×10−3 mol/L was achieved, with a low detection limit of 8.9×10−10 mol/L (S/N=3). The mechanism and the heterogeneous electron transfer kinetics of the 4-nitrophenol reduction were discussed according to the rotating disk electrode experiments. Furthermore, the sensing platform has been applied to the determination of 4-nitrophenol in real samples.