In this work, the dispersibility of graphene oxide (GO) nanosheets in an aqueous solution was significantly improved by applying air–water plasma using the dielectric barrier discharge (DBD) technique. The effects of different process variables such as the voltage, frequency, and the processing time of air–water plasma treatment on the oxidation degree of GO nanosheets were investigated by Fourier transform infrared (FT-IR) spectroscopy and other characterization methods. High-resolution transmission electron microscopy (HR-TEM), energy-dispersive X-ray spectroscopy (EDS), Fourier transform infrared (FT-IR), ultraviolet-visible (UV–vis) spectroscopy, X-ray photoelectron spectroscopy (XPS), Raman spectroscopy, and X-ray diffraction (XRD) were employed to characterize the modified and unmodified GO nanoparticles. Finally, the stability of functionalized and non-functionalized GO nanosheets in aqueous media was investigated by UV–vis spectroscopy. According to the results, the plasma-treated GO nanosheets contained the maximum number of bonded carbonyl/carboxyl groups among the studied samples at a frequency (f) of 6 kHz, a voltage (V) of 8 kV, and a processing time (t) of 5 min.

在这项工作中，通过使用介质阻挡放电（DBD）技术施加空气-水等离子体，显着提高了氧化石墨烯（GO）纳米片在水溶液中的分散性。通过傅立叶变换红外光谱（FT-IR）和其他表征方法，研究了不同工艺变量（如电压，频率和气-水等离子体处理时间）对GO纳米片氧化程度的影响。高分辨率透射电子显微镜（HR-TEM），能量色散X射线光谱（EDS），傅里叶变换红外（FT-IR），紫外可见（UV-vis）光谱，X射线光电子光谱（XPS） ，拉曼光谱和X射线衍射（XRD）用于表征改性和未改性的GO纳米颗粒。最后，通过紫外可见光谱研究了功能化和非功能化GO纳米片在水性介质中的稳定性。根据结果​​，经等离子体处理的GO纳米片在频率为6 kHz的频率（f），电压为8 kV的电压（V）和处理时间（t）的条件下，在研究的样品中包含最大数量的键合羰基/羧基基团。 ）的5分钟。