Fast and fully-scalable synthesis of reduced graphene oxide.
Fast and fully-scalable synthesis of reduced graphene oxide.
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DOI：
10.1038/srep10160
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发表时间：
2015-05-15
影响因子：
4.6
通讯作者：
Seop Kim H
中科院分区：
文献类型：
--
作者：
Abdolhosseinzadeh S;Asgharzadeh H;Seop Kim H
石墨的剥离是大规模生产石墨烯的一种有前途的方法。石墨的氧化有效地促进了剥离过程，但需要几个冗长的洗涤和还原过程来将剥离的氧化石墨（氧化石墨烯，GO）转化为还原的氧化石墨烯（RGO）。虽然过滤、离心和透析已被频繁地用于洗涤阶段，但它们都不利于大规模生产。在这里，我们报告的合成RGO的超声辅助氧化石墨在高锰酸钾和浓硫酸的溶液中，然后用抗坏血酸还原之前的任何洗涤过程。GO在还原阶段期间失去其亲水性，这有利于洗涤步骤并减少生产RGO所需的时间。此外，同时氧化和剥离显着提高少层GO的产率。我们希望这种一锅法和完全可扩展的协议为石墨烯的实验室应用铺平道路。
Exfoliation of graphite is a promising approach for large-scale production of graphene. Oxidation of graphite effectively facilitates the exfoliation process, yet necessitates several lengthy washing and reduction processes to convert the exfoliated graphite oxide (graphene oxide, GO) to reduced graphene oxide (RGO). Although filtration, centrifugation and dialysis have been frequently used in the washing stage, none of them is favorable for large-scale production. Here, we report the synthesis of RGO by sonication-assisted oxidation of graphite in a solution of potassium permanganate and concentrated sulfuric acid followed by reduction with ascorbic acid prior to any washing processes. GO loses its hydrophilicity during the reduction stage which facilitates the washing step and reduces the time required for production of RGO. Furthermore, simultaneous oxidation and exfoliation significantly enhance the yield of few-layer GO. We hope this one-pot and fully-scalable protocol paves the road toward out of lab applications of graphene.
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