Beijing Key Laboratory of Work Safety Intelligent Monitoring, School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, People's Republic of China.
Nanotechnology. 2022 Sep 27;33(50). doi: 10.1088/1361-6528/ac90cd.
Free-standing Cu/CuO/CuO modified by graphene was formed through two steps: Firstly, the commercial Cu foil was thermal annealed to form Cu/CuO/CuO; Secondly, the Cu/CuO/CuO was modified by graphene through electrochemical exfoliated method. The SEM, XRD, TEM and XPS have been used to characterize the morphology, the crystalline phase, and the surface composition of the hybrid electrode as-prepared. The effects of Cu and its oxides on graphene has been uncovered by the Raman results. The sensitivity of the glucose sensor in 0.1 M NaOH by using the as-prepared hybrid material reaches 3102A·mMcmwithin a linear range of 0.002-2.88 mM, which is better than that of the Cu/graphene and the Cu/CuO/CuO prepared at the same conditions. The sensor also shows excellent anti-interference ability, good cycling stability and time stability. The advantage of the sensor is caused by the strengthened synergistic effects between the graphene and the Cu/CuO/CuO due to the alleviated detrimental effects of the metal on the property of the graphene through using oxides middle layer as well as the large active area that obtained. This work provides a new way to study the effects of graphene in improving the property of the metal oxide especially in using for glucose sensor.
独立的 Cu/CuO/CuO 被石墨烯修饰是通过两步形成的：首先，商用 Cu 箔经过热退火形成 Cu/CuO/CuO；其次，通过电化学剥离法将 Cu/CuO/CuO 修饰为石墨烯。SEM、XRD、TEM 和 XPS 用于表征所制备的混合电极的形貌、结晶相和表面组成。通过 Raman 结果揭示了 Cu 及其氧化物对石墨烯的影响。使用所制备的混合材料，在 0.1 M NaOH 中的葡萄糖传感器的灵敏度在 0.002-2.88 mM 的线性范围内达到 3102A·mMcm，优于在相同条件下制备的 Cu/石墨烯和 Cu/CuO/CuO。该传感器还表现出优异的抗干扰能力、良好的循环稳定性和时间稳定性。该传感器的优势归因于通过使用氧化物中间层以及获得的大活性面积，减轻了金属对石墨烯性能的不利影响，从而增强了石墨烯和 Cu/CuO/CuO 之间的协同作用。这项工作为研究石墨烯在改善金属氧化物性能方面的作用提供了一种新方法，特别是在用于葡萄糖传感器方面。
