The synthesis of water-dispersible graphene (W-Gr) is essential for both laboratory-scale studies and practical applications. Herein, we report a green electrochemical route followed by post-sonication to prepare few-layered W-Gr of 1–6 atomic layers in thickness and 1.0–7.0 μm² in area with a remarkably high yield (87.3%). Both outstanding dispersibility (8.2 mg mL⁻¹) and good stability (at least 6 months) are achieved in water. Mechanism analysis indicates the critical effect of terephthalic acid coverage on the anode for adequate electrochemical oxidation, which is the prerequisite for subsequent bubble- and sonication-exfoliation. This partial anode coverage strategy provides a new possibility of a simple electrochemical setup to greenly and scalably fabricate graphene with specific functionality.

中文翻译：

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阳极覆盖以增强电化学氧化：一种绿色高效的水分散性石墨烯策略

水分散性石墨烯（W-Gr）的合成对于实验室规模的研究和实际应用都是必不可少的。此，我们报告一个绿色电化学途径，接着后超声处理，以制备厚度为1-6个原子层和1.0-7.0微米几个分层W-的Gr ²在面积显着高的产率（87.3％）。均具有出色的分散性（8.2 mg mL ^-1）并在水中达到良好的稳定性（至少6个月）。机理分析表明，对苯二甲酸覆盖在阳极上对于充分的电化学氧化具有至关重要的作用，这是随后进行气泡和超声处理剥落的前提条件。这种部分阳极覆盖策略为简单的电化学设置提供了新的可能性，以绿色且可缩放地制造具有特定功能的石墨烯。