Photo-Synergetic Electrochemical Synthesis of Graphene Oxide,Journal of the American Chemical Society

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Photo-Synergetic Electrochemical Synthesis of Graphene Oxide
Journal of the American Chemical Society ( IF 14.4 ) Pub Date : 2020-03-24 , DOI: 10.1021/jacs.0c02158
Duhong Chen ₁ , Zhen Lin ₁ , Matthew M. Sartin ₁ , Teng-Xiang Huang ₁ , Jia Liu ₁ , Qiugen Zhang ₁ , Lianhuan Han ₁ , Jian-Feng Li ₁ , Zhong-Qun Tian ₁ , Dongping Zhan ₁

Affiliation

Here we propose a strategy of radical oxidation reaction for the high-efficiency production of graphene oxide (GO). GO plays important roles in the sustainable development of energy and the environment, taking the advantages of oxygen-containing functional groups for good dispersibility and assembly. Compared with Hummers' method, electrochemical exfoliation of graphite is con-sidered facile and green, although the oxidation is pretty low. To synthesize GO with better crystallinity and higher oxidation degree, we present a photo-synergetic electrochemical method. By using oxalate anions as the intercalation ions and coreactant, the interfacial concentration of hydroxyl radicals generated during electrochemical exfoliation was promoted, and the oxidation degree was comparable with that of GO prepared by Hummers' method. In addition, the crystallinity was improved with fewer layers and larger size. More-over, the aniline co-assembled GO membrane was selectively per-meable to water molecules by the hydrogen-bond interaction, but it was impermeable to Na+, K+ and Mg2+, due to the electrostatic interactions. Thus, it has a prospective application to water desalina-tion and purification. This work opens a novel approach to the di-rect functionalization of graphene during the electro-exfoliation processes and to the subsequent assembly of the functionalized graphene.

中文翻译：

氧化石墨烯的光协同电化学合成

在这里，我们提出了一种用于高效生产氧化石墨烯（GO）的自由基氧化反应策略。GO利用含氧官能团具有良好的分散性和组装性，在能源和环境的可持续发展中发挥着重要作用。与 Hummers 的方法相比，石墨的电化学剥离被认为是容易和绿色的，尽管氧化非常低。为了合成具有更好结晶度和更高氧化度的 GO，我们提出了一种光协同电化学方法。通过使用草酸阴离子作为嵌入离子和共反应物，提高了电化学剥离过程中产生的羟基自由基的界面浓度，氧化程度与 Hummers 法制备的 GO 相当。此外，通过更少的层数和更大的尺寸提高了结晶度。此外，苯胺共组装的 GO 膜通过氢键相互作用选择性地渗透水分子，但由于静电相互作用，它对 Na+、K+ 和 Mg2+ 不渗透。因此，它在海水淡化和净化方面具有前瞻性的应用。这项工作为在电剥离过程中石墨烯的直接功能化以及功能化石墨烯的后续组装开辟了一种新方法。它在海水淡化和净化方面具有前瞻性应用。这项工作为在电剥离过程中石墨烯的直接功能化以及功能化石墨烯的后续组装开辟了一种新方法。它在海水淡化和净化方面具有前瞻性应用。这项工作为在电剥离过程中石墨烯的直接功能化以及功能化石墨烯的后续组装开辟了一种新方法。

更新日期：2020-03-24

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