High-quality graphene via microwave reduction of solution-exfoliated graphene oxide
2016; American Association for the Advancement of Science; Volume: 353; Issue: 6306 Linguagem: Inglês
10.1126/science.aah3398
ISSN1095-9203
AutoresDamien Voiry, Jieun Yang, Jacob Kupferberg, Raymond Fullon, Calvin Lee, Hu Young Jeong, Hyeon Suk Shin, Manish Chhowalla,
Tópico(s)Supercapacitor Materials and Fabrication
ResumoEfficient 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.
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