a The Key Laboratory of Bioactive Materials, Ministry of Education, College of Life Science, Nankai University, Weijin Road No. 94, Tianjin 300071, China.
Institution of Entomology, College of Life Science, Nankai University, Tianjin 300071, China.
Talanta. 2017 Apr 1;165:604-611. doi: 10.1016/j.talanta.2017.01.017. Epub 2017 Jan 7.
Graphene sheets are a sp-hybridized carbon material that offer extraordinary electrical conductivity and excellent thermal and mechanical properties. They are expected to find use in a wide variety of applications. In this study, a new novel electrocatalyst, a Pb nanowires-Au nanoparticles nanocomposite decorated with reduced graphene oxide (rGO-Pb NWs-Au NPs), was successfully synthesized by an effective and simple approach. Transmission electron microscopy (TEM), X-ray diffraction (XRD) and Raman spectroscopy were employed to observe the as-prepared nanomaterial. In addition, the electrochemical behaviors of a rGO-Pb NWs-Au NPs-modified glassy carbon (GC) electrode were evaluated by cyclic voltammetry and chronoamperometry. The final prepared sensor exhibited favorable electroreduction activity towards HO with a remarkable sensitivity of 552.43µAmMcm, a wide linear range of 0.005-1.25mM, a detection limit of 0.6µM and a rapid response time (within 5s). Moreover, the sensor also exhibited good reproducibility, selectivity and stability. Therefore, the present work also provides a potential practicable approach to fabricate various of non-enzymatic amperometric sensors, such as sensors for the detection of glucose, urea, ascorbic acid and dopamine.
石墨烯片是一种 sp 杂化的碳材料，具有非凡的导电性和优异的热学和力学性能。它们有望在各种应用中得到应用。在这项研究中，通过一种有效且简单的方法成功合成了一种新型电催化剂，即还原氧化石墨烯（rGO-Pb NWs-Au NPs）修饰的 Pb 纳米线-Au 纳米颗粒纳米复合材料。透射电子显微镜（TEM）、X 射线衍射（XRD）和拉曼光谱用于观察所制备的纳米材料。此外，通过循环伏安法和计时安培法评估了 rGO-Pb NWs-Au NPs 修饰的玻碳（GC）电极的电化学行为。最终制备的传感器对 HO 表现出良好的电还原活性，具有 552.43µAmMcm 的显著灵敏度、0.005-1.25mM 的宽线性范围、0.6µM 的检测限和 5s 以内的快速响应时间。此外，该传感器还表现出良好的重现性、选择性和稳定性。因此，本工作还为制备各种非酶电流型传感器提供了一种可行的方法，例如用于检测葡萄糖、尿素、抗坏血酸和多巴胺的传感器。
