还原氧化石墨烯的可控制备及表征  

Controllable Preparation and Structural Characterizations of Reduced Graphene Oxide

作　　者：朱玉方 张慧丽 梁丰国 杨新伟 陈长科 买买提江·依米提[1] 马俊红[1] ZHU Yufang;ZHANG Huili;LIANG Fengguo;YANG Xinwei;CHEN Changke;YIMIT Mamatjan;MA Junhong(School of Chemical Engineering,Xinjiang University,Urumqi 830046,China;Xinjiang Key Laboratory of Aluminum-based Electronic and Electrical Materials of Xinjiang Joinword Company Limited,Urumqi 830013,China;Xinjiang Joinword Company Limited,Urumqi 830013,China)

机构地区：[1]新疆大学化工学院,乌鲁木齐830046 [2]新疆众和股份有限公司新疆铝基电子电工材料重点实验室,乌鲁木齐830013 [3]新疆众和股份有限公司,乌鲁木齐830013

出　　处：《材料导报》2024年第12期52-57,共6页Materials Reports

基　　金：企业委托课题。

摘　　要：化学氧化还原法是工业上较为成熟的一种制备还原氧化石墨烯(Reduced graphene oxide,RGO)的方法。本研究首先采用改进Hummers法氧化剥离石墨,在喷雾干燥条件下获得了片状氧化石墨烯(Graphene oxide,GO),然后分别采用维生素C(Vitamin C,VC)化学还原、快速升温热还原、慢速升温热还原、VC还原结合快速升温热还原法对GO样品进行还原,得到了四种RGO样品,并对其进行了全面的物理化学表征。结果表明,还原方法对RGO形貌结构及导电性有显著影响:采用VC化学还原可得到比表面积较大且具有微/介多级孔道的球状RGO,其还原程度低,导电性差;采用热还原可得到还原程度较高、导电性良好的片状RGO,并且较快的升温速率有利于发生膨胀剥离,可有效提高相应RGO样品的比表面积;VC还原与快速升温热还原相结合则可以得到比表面积和还原程度都较高的多孔球状RGO,但由于RGO颗粒之间较大的接触电阻,其导电性不及热还原得到的片状RGO。Chemical oxidation-reduction is a relatively mature method for preparing reduced graphene oxide(RGO)in industry.In this study,graphite was first oxidized using the modified Hummers method,and then the graphene oxide(GO)with lamellar structure could be obtained by spray drying.After that,four types of RGO samples were prepared,respectively,by using vitamin C(VC)chemical reduction,rapid-heating reduction,slow-heating reduction,and combined VC reduction with rapid-heating reduction methods,and the comprehensive physicochemical cha-racterization was carried out.The results show that the reduction method has a significant effect on the morphology,structure,and conductivity of the obtained RGO.By using VC chemical reduction,spherical RGO with large specific surface area and micro-meso hierarchical pore structure could be produced,and it exhibits low reduction degree and conductivity.The layered RGO samples with high reduction degree and good conductivity can be fabricated by thermal reduction,especially the rapid heating would be conducive to the expansion and peeling of RGO and thus effectively improve its specific surface area.When VC reduction and rapid-heating reduction are used in combination,the generated porous spherical RGO possesses high specific surface area and reduction degree,nevertheless,duing to the large contact resistance between RGO particles,its conductivity is inferior to corresponding RGO sheets produced by thermal reduction.

关 键 词：还原氧化石墨烯 还原方法 化学还原 热还原 维生素C 

分 类 号：O613[理学—无机化学]