Electrochemical reduction in aqueous graphene oxide (GO) dispersion has emerged as an alternative route to producing a reduced GO (rGO) membrane on Au mesh. Under scanning electron microscopy, an interesting pattern formed by distinct differences was discovered from the deoxidization evolution. Scanning transmission X-ray microscopy shows the chemical composition coordination mixing of C–OH, C–O–C, HO–CO, and CO bonds at nanoscale resolution. The electrochemical reduction of C–OH, new bonding of C–O–C, and structure recovery of CC were obtained from GO transformation into the rGO membrane. In Kelvin probe force microscopy, the same pattern of rGO was also observed for the diversity of work functions ranging from 5.55 to 5.70 eV compared with the uniform distribution of GO of 5.78 eV. Density functional theory calculations predicted that the work function variation originated from the dependence of O atom number and functional group species. A high (low) diversity in work function values was ascribed to the C–O–C (HO–CO) bond even with increasing oxygen numbers, accounting for the peak variation. Controlling the work function holds great significance for photovoltaic behavior and band alignment in photoelectric devices. Thus, growing large-area rGO membranes offers a new route to obtaining membranes for applications requiring transparent materials.

水性氧化石墨烯 (GO) 分散体中的电化学还原已成为在 Au 网上生产还原 GO (rGO) 膜的替代途径。在扫描电子显微镜下，从脱氧过程中发现了由明显差异形成的有趣图案。扫描透射 X 射线显微镜显示了纳米级分辨率的 C-OH、C-O-C、HO-C O 和CO 键的化学成分配位混合。C-OH的电化学还原、C-O-C的新键合和C的结构恢复C 是从 GO 转化到 rGO 膜中获得的。在开尔文探针力显微镜中，与 GO 的均匀分布 5.78 eV 相比，在 5.55 至 5.70 eV 范围内的功函数多样性也观察到了相同的 rGO 模式。密度泛函理论计算预测，功函数变化源于 O 原子数和官能团种类的依赖性。功函数值的高（低）多样性归因于 C-O-C (HO-C O) 键，即使氧数增加，也解释了峰值变化。控制功函数对光电器件中的光伏行为和能带对准具有重要意义。因此，生长大面积 rGO 膜为获得用于需要透明材料的应用的膜提供了新途径。