In this study, biological deoxygenation of graphene oxide (GO) using an Eclipta prostrata phytoextract was performed via the infusion method. The presence of oxide groups on the surface of graphene and removal of oxides groups by reduction were characterized through morphological and structural analyses. Field emission scanning electron microscopy images revealed that the synthesized GO and rGO were smooth and morphologically sound. Transmission electron microscopy images showed rGO developing lattice fringes with smooth edges and transparent sheets. Atomic force microscopy images showed an increase in the surface roughness of graphite oxide (14.29 nm) compared with that of graphite (1.784 nm) due to the presence of oxide groups after oxidation, and the restoration of surface roughness to 2.051 nm upon reduction. Energy dispersive X-ray analysis indicated a difference in the carbon/oxygen ratio between GO (1.90) and rGO (2.70). Fourier-transform infrared spectroscopy spectrum revealed peak stretches at 1029, 1388, 1578, and 1630 cm⁻¹ for GO, and a decrease in the peak intensity after reduction that confirmed the removal of oxide groups. X-ray photoelectron microscopy also showed a decrease in the intensity of oxygen peak after reduction. In addition, thermogravimetric analysis suggested that rGO was less thermally stable than graphite, graphite oxide, and GO, with rGO decomposing after heating at temperatures ranging from room temperature to 600 °C.

在这项研究中，使用Eclipta prostrata对氧化石墨烯 (GO) 进行生物脱氧植物提取物是通过输注方法进行的。通过形态和结构分析表征石墨烯表面上氧化物基团的存在和通过还原去除氧化物基团。场发射扫描电子显微镜图像显示合成的 GO 和 rGO 光滑且形态良好。透射电子显微镜图像显示 rGO 形成具有光滑边缘和透明片的晶格条纹。原子力显微镜图像显示氧化石墨的表面粗糙度 (14.29 nm) 与石墨 (1.784 nm) 相比有所增加，这是由于氧化后存在氧化物基团，还原后表面粗糙度恢复至 2.051 nm。能量色散 X 射线分析表明 GO (1.90) 和 rGO (2.70) 之间的碳/氧比存在差异。GO为^-1，还原后峰强度降低，证实去除了氧化物基团。X射线光电子显微镜也显示还原后氧峰强度降低。此外，热重分析表明，rGO 的热稳定性低于石墨、氧化石墨和 GO，rGO 在室温至 600 °C 的温度范围内加热后会分解。