Materials Science and Engineering, Rutgers University, 607 Taylor Road, Piscataway, NJ 08854, USA.
Central Research Facilities and School of Materials Science and Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 689-798, Republic of Korea.
Science. 2016 Sep 23;353(6306):1413-1416. doi: 10.1126/science.aah3398. Epub 2016 Sep 1.
Efficient exfoliation of graphite in solutions to obtain high-quality graphene flakes is desirable for printable electronics, catalysis, energy storage, and composites. Graphite oxide with large lateral dimensions has an exfoliation yield of ~100%, but it has not been possible to completely remove the oxygen functional groups so that the reduced form of graphene oxide (GO; reduced form: rGO) remains a highly disordered material. Here we report a simple, rapid method to reduce GO into pristine graphene using 1- to 2-second pulses of microwaves. The desirable structural properties are translated into mobility values of >1000 square centimeters per volt per second in field-effect transistors with microwave-reduced GO (MW-rGO) as the channel material and into particularly high activity for MW-rGO catalyst support toward oxygen evolution reactions.
在溶液中高效剥离石墨以获得高质量的石墨烯薄片，这对于可印刷电子产品、催化、储能和复合材料来说是非常理想的。具有较大横向尺寸的氧化石墨的剥离产率约为 100%，但迄今为止还不可能完全去除氧官能团，因此氧化石墨烯的还原形式（GO；还原形式：rGO）仍然是一种高度无序的材料。在这里，我们报告了一种简单、快速的方法，使用 1 到 2 秒的微波脉冲将 GO 还原为原始石墨烯。在作为沟道材料的微波还原 GO（MW-rGO）的场效应晶体管中，这些理想的结构特性转化为大于 1000 平方厘米每伏特每秒的迁移率值，并且 MW-rGO 催化剂载体对氧气析出反应具有特别高的活性。
