一种石墨高效剥离成石墨烯的新策略  

A new strategy for the efficient exfoliation of graphite into graphene

作　　者：柴琳 崔晓静 齐永琴[1,2,3] 滕娜 侯相林[1,2,3] 邓天昇[1,2,3] CHAI Lin;CUI Xiao-jing;QI Yong-qin;TENG Na;HOU Xiang-lin;DENG Tian-sheng(Shanxi Engineering Research Center of Biorefinery,Institute of Coal Chemistry,Chinese Academy of Sciences,Taiyuan 030001,China;Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing 100049,China;CAS key laboratory of carbon materials,Institute of Coal Chemistry,Chinese Academy of Sciences,Taiyuan 030001,China;Institute of Interface Chemistry and Engineering,Department of Chemistry and Chemical Engineering,Taiyuan Institute of Technology,Taiyuan 030008,China)

机构地区：[1]中国科学院山西煤炭化学研究所生物炼制工程研究中心,山西太原030001 [2]中国科学院大学材料科学与光电子工程中心,北京100049 [3]中国科学院山西煤炭化学研究所炭材料重点实验室,山西太原030001 [4]太原工业学院化学与化学工程系界面化学与工程研究所,山西太原030008

出　　处：《新型炭材料》2021年第6期1179-1187,共9页New Carbon Materials

基　　金：国家自然科学基金-山西省煤基低碳联盟基金资助项目(U1710252);山西省科委应用基础研究计划项目(201901D111006/ZD).

摘　　要：超声剥离法被认为是由石墨制备石墨烯最方便、最清洁的方法,但在溶剂中大量处理石墨时,其产率较低,且超声剥离后的石墨难以进一步再被剥离为石墨烯,造成大量的资源浪费。因此本文提出了一种超声与研磨相结合的高效剥离石墨制石墨烯的新策略。结果表明,超声剥离后不能再被剥离的石墨经超声和研磨处理后,可进一步剥离为石墨烯,石墨烯收率可达4.73%。产生这种现象的原因可能是由于石墨层的规则堆叠被破坏,且产生了卷曲的石墨边缘,这些均为溶剂进入石墨层间克服作用力提供了“楔入点”。获得的石墨烯片层均小于10层。该工作为石墨大规模高效剥离制少缺陷石墨烯提供了一种新策略。Ultrasonication is regarded as the most convenient and cleanest approach for graphene preparation from graphite.However,the yields are low in large scale preparation because after ultrasonication the exfoliated graphite is difficult to exfoliate into graphene,which leads to a great deal of waste.A new strategy for the efficient exfoliation of the exfoliated graphite into graphene was investigated by combining ultrasonication and grinding treatments.Results indicated that the exfoliated graphite produced by ultrasonication could be further exfoliated into graphene by combining ultrasonication and grinding.The obtained graphene sheets were all comprised of fewer than 10 layers with a yield of 4.73%.This was attributed to the destruction of the regular stacking of the graphite layers and scrolling and folding their edges to provide entry points for the solvent to overcome the interlayer forces between adjacent layers.This work provides a new strategy for the efficient exfoliation of graphite into few-defect graphene on a large scale.

关 键 词：石墨烯 剥离 研磨 超声 石墨 

分 类 号：TQ127.11[化学工程—无机化工]