Sobahi Nebras, Imran Mohd, Khan Mohammad Ehtisham, Mohammad Akbar, Alam Md Mottahir, Yoon Taeho, Mehedi Ibrahim M, Hussain Mohammad A, Abdulaal Mohammed J, Jiman Ahmad A
Department of Electrical & Computer Engineering, Faculty of Engineering, King Abdulaziz University, Jeddah 21589, Saudi Arabia.
Department of Chemical Engineering, College of Engineering, Jazan University, Jazan 45142, Saudi Arabia.
Materials (Basel). 2023 Mar 30;16(7):2770. doi: 10.3390/ma16072770.
We report the synthesis of FeO/graphene (FeO/Gr) nanocomposite for highly selective and highly sensitive peroxide sensor application. The nanocomposites were produced by a modified co-precipitation method. Further, structural, chemical, and morphological characterization of the FeO/Gr was investigated by standard characterization techniques, such as X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscope (TEM) and high-resolution TEM (HRTEM), Fourier transform infrared (FTIR), and X-ray photoelectron spectroscopy (XPS). The average crystal size of FeO nanoparticles was calculated as 14.5 nm. Moreover, nanocomposite (FeO/Gr) was employed to fabricate the flexible electrode using polymeric carbon fiber cloth or carbon cloth (pCFC or CC) as support. The electrochemical performance of as-fabricated FeO/Gr/CC was evaluated toward HO with excellent electrocatalytic activity. It was found that FeO/Gr/CC-based electrodes show a good linear range, high sensitivity, and a low detection limit for HO detection. The linear range for the optimized sensor was found to be in the range of 10-110 μM and limit of detection was calculated as 4.79 μM with a sensitivity of 0.037 µA μM cm. The cost-effective materials used in this work as compared to noble metals provide satisfactory results. As well as showing high stability, the proposed biosensor is also highly reproducible.
我们报道了用于高选择性和高灵敏度过氧化物传感器应用的FeO/石墨烯（FeO/Gr）纳米复合材料的合成。该纳米复合材料通过改进的共沉淀法制备。此外，采用标准表征技术，如X射线衍射（XRD）、扫描电子显微镜（SEM）、透射电子显微镜（TEM）和高分辨率TEM（HRTEM）、傅里叶变换红外光谱（FTIR）以及X射线光电子能谱（XPS），对FeO/Gr进行了结构、化学和形态表征。计算得出FeO纳米颗粒的平均晶体尺寸为14.5 nm。此外，以聚合物碳纤维布或碳布（pCFC或CC）为支撑，采用纳米复合材料（FeO/Gr）制备了柔性电极。对制备的FeO/Gr/CC针对H₂O₂的电化学性能进行了评估，其具有优异的电催化活性。结果发现，基于FeO/Gr/CC的电极在H₂O₂检测方面表现出良好的线性范围、高灵敏度和低检测限。优化后的传感器的线性范围为10 - 110 μM，检测限计算为4.79 μM，灵敏度为0.037 µA μM⁻¹ cm⁻²。与贵金属相比，本工作中使用的具有成本效益的材料提供了令人满意的结果。所提出的生物传感器不仅显示出高稳定性，而且具有高度可重复性。
