基于高能微波真空辐射快速制备石墨烯

基于高能微波处理技术,在强烈的非稳态条件下对氧化石墨进行剥离/还原,实现了石墨烯的快速制备.结果表明,经功率为6kW微波辐照,在≤35kPa的低真空谐振腔中,只用10s左右即可实现氧化石墨片层快速彻底的剥离,并可实现原位还原.通过SEM,TEM,TG-DSC等的微观结构表征显示,多数产物层数在23层之间,且样品中残留的含氧基团非常少.但也由于强烈的非稳态过程,石墨烯的制备效果存在着一定的分散性,样品中也夹杂有极少量层数约为1020层的石墨烯微片.结果表明,采用高能微波辐照,并结合施加的真空环境,有助于强化或促进碳环片层的剥离/还原效果,实现高质量石墨烯的高效快速获取....

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Bibliographic Details
Published in材料工程 no. 7; pp. 39 - 43
Main Author 薛伟江 于娟 丁滔 张寿春 王继刚
Format Journal Article
LanguageChinese
Published 东南大学 材料科学与工程学院 江苏省先进金属材料重点实验室,南京 211189 2014
东南大学-张家港工业技术研究院,江苏 张家港 215628%中国科学院 山西煤炭化学研究所 碳纤维制备技术国家工程实验室,太原,030001
Subjects
合成
氧化石墨
真空
石墨烯
高能微波
synthesis
合成
high-energy microwave
氧化石墨
vacuum
真空
石墨烯
高能微波
graphite oxide
graphene
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ISSN1001-4381
1001-4381
DOI10.11868/j.issn.1001-4381.2014.07.008

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Summary:基于高能微波处理技术,在强烈的非稳态条件下对氧化石墨进行剥离/还原,实现了石墨烯的快速制备.结果表明,经功率为6kW微波辐照,在≤35kPa的低真空谐振腔中,只用10s左右即可实现氧化石墨片层快速彻底的剥离,并可实现原位还原.通过SEM,TEM,TG-DSC等的微观结构表征显示,多数产物层数在23层之间,且样品中残留的含氧基团非常少.但也由于强烈的非稳态过程,石墨烯的制备效果存在着一定的分散性,样品中也夹杂有极少量层数约为1020层的石墨烯微片.结果表明,采用高能微波辐照,并结合施加的真空环境,有助于强化或促进碳环片层的剥离/还原效果,实现高质量石墨烯的高效快速获取.
Bibliography:11-1800/TB
high-energy microwave ; vacuum ; synthesis ; graphite oxide; graphene
Fast preparation of graphene via high-energy microwave irradiation was achieved. Rapid andcomplete exfoliation and iwsitu reduction of graphite oxide film layer were realized in about 10s underthe strong unsteady state treatment composing of 6kW-power microwave irradiation and low vacuum（≤35kPa） environment. Microstructure characterizations were carried out by using SEM, TEM,XRD, Raman and TG-DSC. Results show that the majority of the products are characterized with thestacking of 2-3 layers, and a very small amount of residual oxygen-containing functional groups remainin the sample. Meanwhile, due to the strong unsteady state treatment, the distribution of microwaveenergy or the exfoliation of carbon-rings can be founded in the resonant cavity, resulting in the exist-ing of some graphene nanosheets characterized with the stacking of 10-20 layers. The result indicatesthat high-energy irradiation, combined with vacuum environment, b
ISSN:1001-4381
1001-4381
DOI:10.11868/j.issn.1001-4381.2014.07.008