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Highly conductive chemically converted graphene prepared from mildly oxidized graphene oxide

2011; Royal Society of Chemistry; Volume: 21; Issue: 20 Linguagem: Inglês

10.1039/c1jm10768b

1364-5501

Yuxi Xu, Kaixuan Sheng, Chun Li, Gaoquan Shi,

Graphene and Nanomaterials Applications

Mildly oxidized graphene oxide (MOGO) was achieved by chemical exfoliation of graphite through a modified Hummers' method. The MOGO is not only able to be stably dispersed in water at a high concentration (1 mg mL−1), but also preserves the highly crystalline structure of the conjugated carbon framework. Thus, the MOGO can be used as a low-defect precursor to prepare highly conductive graphene by chemical reduction. The electrical conductivity of hydrazine or hydriodic acid reduced MOGO was measured to be 169 or 405 S cm−1. This value is about 3 times that of the chemically converted graphene (CCG) prepared by reducing the conventional graphene oxide via Hummers' method with the same reducing agent. This work not only develops a facile route to high-throughput preparation of processable high-quality CCG, but also provides a deeper understanding of the crucial influence of the degree of oxidation of graphene oxide on the electrical properties of its reduced product.