基于PtCo合金纳米粒子的新型无酶葡萄糖传感器

A Novel Non-Enzymatic Glucose Sensor Based on PtCo Alloy Nanoparticles

在室温下,通过反相微乳液法,合成PtCo合金纳米粒子。利用XRD、HRTEM和EDS对合成的纳米粒子的物理性质进行表征,结果表明:合成PtCo合金纳米粒子为面心立方结构的无序合金,Pt和Co原子比为5:1。电化学测试结果表明:构筑的PtCo/GCE无酶葡萄糖传感器对检测葡萄糖表现出宽的线性范围(0.5 mM^60 mM)、快速的响应时间(t ?1cm?2)。对抗坏血酸、尿酸和果糖,传感器也表现出了很高的抗干扰性能。

The PtCo alloy nanoparticles were synthesized by inverse micro-emulsion at room temperature. The structure, morphology and composition of as-synthesized PtCo NPs were characterized by using XRD, HRTEM and EDS. The results demonstrated that as-synthesized PtCo NPs were a disordered alloy with a face-centered cubic structure, with 3 nm of average size, and the Pt/Co atomic ratios were approximately 5:1. The electrochemical characterization revealed that the non-enzymatic glucose sensor based on PtCo NPs (PtCo/GCE) exhibited a superior performance towards glucose detection, such as a wide linear range (0.5 mM - 60 mM), rapid response (t ?1cm?2). The sensor also exhibited anti-interference ability from ascorbic acid (AA), uric acid (UA) and fructose (Fru).