High-yield preparation of graphene oxide from small graphite flakes via an improved Hummers method with a simple purification process
High-yield preparation of graphene oxide from small graphite flakes via an improved Hummers method with a simple purification process
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通过改进的 Hummers 方法和简单的纯化过程，从小石墨片中高产率制备氧化石墨烯
DOI：
10.1016/j.carbon.2014.10.033
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发表时间：
2015-01-01
期刊：
影响因子：
10.9
通讯作者：
Shi, Gaoquan
中科院分区：
文献类型：
--
作者：
Chen, Ji;Li, Yingru;Shi, Gaoquan
通过改进的Hummers方法，可以将尺寸在3-20 μ m范围内的石墨薄片完全转化为单层氧化石墨烯（GO），产率高达171 ± 4%。该产率比100 μ m大小的较大石墨薄片的产率（110 +/-3%）高得多。由两种石墨前体制备的GO片的结构、质量和尺寸分布几乎相同。更重要的是，在使用小石墨薄片的情况下，GO分散体可以直接纯化，而不需要离心以除去未氧化的残留物。考虑到GO的高收率、简化的纯化过程和高质量，使用小尺寸石墨薄片的改性是实现GO工业规模化生产的重要一步。(C)2014爱思唯尔有限公司版权所有。
Graphite flakes with sizes in the range of 3-20 mu m can be completely converted into single-layer graphene oxide (GO) with a high yield of 171 +/- 4% via an improved Hummers method. This yield is much higher than that (110 +/- 3%) from larger graphite flakes with sizes of 100 mu m. The structures, qualities and size distributions of the GO sheets prepared from both graphite precursors are nearly identical. More importantly, in the case of using small graphite flakes, the GO dispersion can be directly purified without the requirement of centrifugation to remove unoxidized residuals. Considering the high yield, simplified purification procedure, and high-quality of GO, the modification of using graphite flakes with small sizes is an important step towards the mass-production of GO at industrial scale. (C) 2014 Elsevier Ltd. All rights reserved.