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利用长链离子液体特殊的性质,用其固定HRP于Au/graphene电极表面(Nafion/HRP/[C10-mim+]Br-/Au/Gr/GCE)组装成H2O2传感器。用透射电镜来表征Au/氧化石墨烯的形貌,金纳米颗粒很均匀的分散在石墨烯表面,并不存在团聚现像。电化学技术检测Nafion/HRP/[C10-mim+]Br-/Au/Gr修饰电极对H2O2的响应情况,显示修饰电极对H2O2有很好的响应,在H2O2浓度2.0×10-6~1.2×10-3 mol/L的范围内,还原电流与浓度存在线性关系(R=0.997),检测限为3.0×10-7 mol/L;另外传感器具有很好的稳定性和选择性,为生物分子的检测提供新方法。
Using the special properties of long-chain ionic liquids, HRP was immobilized on the Au / graphene electrode surface (Nafion / HRP / [C10-mim +] Br- / Au / Gr / GCE) The morphology of Au / graphene oxide was characterized by transmission electron microscopy. The gold nanoparticles were uniformly dispersed on the surface of graphene, and there was no agglomeration. Electrochemical detection of Nafion / HRP / [C10-mim +] Br- / Au / Gr modified electrode response to H2O2, showed that the modified electrode has a good response to H2O2, H2O2 concentration in the 2.0 × 10-6 ~ 1.2 × 10 The linear range of the reduction current to concentration (R = 0.997) was obtained with a detection limit of 3.0 × 10-7 mol / L. In addition, the sensor has good stability and selectivity, Detection provides a new method.