For the purpose of humidity sensing, the rGO/Fe₂O₃ nanocomposite was synthesized through precipitation technique that is followed by lyophilization process to enhance the surface area of the prepared nanocomposite. In order to investigate the sensor preparation quality, its activity and efficiency, the prepared nanocomposite has undergone different characterization techniques such as; high-resolution transmission electron microscopy (HRTEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Raman spectroscopy, thermo-gravimetric analysis (TGA), BET surface area and BJH pore diameter distribution. The study showed that Fe₂O₃ nanoparticles are densely and homogeneously loaded over rGO sheets. The porosity and surface area play an important role on humidity sensing property. In addition, the BET surface area and BJH pore radius of the rGO/Fe₂O₃ are found to be 2002.09 m² g⁻¹ and 1.68 nm, respectively. Furthermore, the humidity-sensing performances were investigated in a wide range of working humidity (11–97% RH) and frequency (100 Hz–100 kHz). The obtained results confirmed that the optimum measuring frequency is 1 kHz, due to in inability of water molecule to be polarized at higher frequency. The humidity sensing performance of rGO/Fe₂O₃ nanocomposite shows a parabola relationship with the RH value from 11 to 97%. The incorporation of Fe₂O₃ into rGO creates more active sites, such as vacancies and defects which promote the adsorption of water molecule thereby increasing the sensitivity of the sensor. Molecular models of graphene; graphene/2Fe₂O₃, graphene/2Fe₂O₃/2H₂O were built. The model suggested that decorating the graphene with 2Fe₂O₃ enable it to be sensitive for humidity.

为了进行湿度感测，通过沉淀技术合成了rGO / Fe ₂ O ₃纳米复合材料，随后进行了冻干工艺以增加所制备的纳米复合材料的表面积。为了研究传感器的制备质量，活性和效率，制备的纳米复合材料经历了不同的表征技术，例如：高分辨率透射电子显微镜（HRTEM），X射线衍射（XRD），X射线光电子能谱（XPS），拉曼光谱，热重分析（TGA），BET表面积和BJH孔径分布。研究表明，Fe ₂ O ₃纳米颗粒被密集且均匀地装载在rGO板上。孔隙率和表面积对湿度感测性能起着重要作用。另外，发现rGO / Fe ₂ O ₃的BET表面积和BJH孔半径分别为2002.09m ² g ^-1和1.68nm。此外，在广泛的工作湿度（11–97％RH）和频率（100 Hz–100 kHz）范围内研究了湿度传感性能。获得的结果证实，由于水分子不能以更高的频率极化，最佳测量频率为1 kHz。rGO / Fe ₂ O ₃的湿度感测性能纳米复合材料表现出抛物线关系，RH值在11％至97％之间。将Fe ₂ O ₃掺入rGO中会产生更多的活性部位，例如空位和缺陷，这些缺陷会促进水分子的吸附，从而提高传感器的灵敏度。石墨烯的分子模型；石墨烯/的2Fe ₂ ö ₃，石墨烯/的2Fe ₂ ö ₃ / 2H ₂ ö被建立了。该模型表明用2Fe ₂ O ₃装饰石墨烯使其对湿度敏感。