非共价作用石墨烯-金纳米复合材料修饰电极的制备及检测双酚A的方法研究

发布时间：2018-05-04 21:02

本文选题：石墨烯 + 金纳米粒子　；参考：《现代食品科技》2017年04期

【摘要】：基于阳离子-π非共价作用力制备石墨烯-金纳米复合材料(graphene-AuNPs),研究基于该纳米复合材料修饰玻碳电极建立电化学传感定量检测水样中双酚A的方法。采用扫描电镜(SEM),EDS能谱和X-射线衍射(XRD)技术对该复合材料进行表征,同时制备基于纳米材料修饰的玻碳电极(graphene-AuNPs/GCE),研究双酚A在修饰电极表面的电化学行为,并将该传感器应用于实际样品中双酚A含量的检测。结果表明,所制备的复合材料结构稳定,分散无团聚现象,粒子尺寸大小均匀;所修饰的纳米材料电极对双酚A有明显的电催化性能,双酚A在修饰电极上的电流响应是裸玻电极的6.3倍。在优化条件下,双酚A在浓度为5.7~570 ng/m L和570~2280 ng/m L范围内与氧化峰电流呈线性,检测限为1.9 ng/m L(S/N=3)。将该修饰电极应用于水体样品中双酚A的检测,回收率在78.91~115.54%。
[Abstract]:Based on the cationic - pi non covalent interaction force preparation of graphene gold nanocomposites (graphene-AuNPs), a method for the quantitative determination of bisphenol A in water samples by electrochemical sensing based on the nano composite modified glass carbon electrode was studied. The composite was characterized by scanning electron microscopy (SEM), EDS spectrum and X- shot line diffraction (XRD). On the basis of Nanomaterial Modified glass carbon electrode (graphene-AuNPs/GCE), the electrochemical behavior of bisphenol A on the surface of the modified electrode was studied. The sensor was applied to the detection of bisphenol A content in the actual samples. The results showed that the composite structure was stable, dispersed without aggregation, and the size of the particles was uniform; the modified nano particles were modified. The material electrode has obvious electrocatalytic performance on bisphenol A, and the current response of bisphenol A on the modified electrode is 6.3 times that of the bare glass electrode. Under the optimum conditions, the bisphenol A is linear with the oxidation peak current within the concentration of 5.7~570 ng/m L and 570~2280 ng/m L, and the detection limit is 1.9 ng/m L (S/). The modified electrode is applied to the water samples. The recovery rate of phenol A was in 78.91~115.54%.

【作者单位】：广东工业大学轻工化工学院制药工程实验室;
【基金】：国家自然科学基金资助项目(41071176、41271340) 广东省自然科学基金项目(S2013030013338)
【分类号】：O657.1

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