超声离心工艺制备氧化石墨烯纳米片  

Synthesis of graphene oxide nanosheets with ultrasonication-centrifugation process

作　　者：张星[1] 罗志佳[2] 张松亭[1] 卢占国[1] 杜宝坛[1] 陈凯[1] 马素俊[1] 张金秋[1] 王婧[2] 王洁[2] 耿宏章[2] 

机构地区：[1]中国石化胜利油田分公司石油工程技术研究院,山东东营257000 [2]天津工业大学材料科学与工程学院,天津300387

出　　处：《重庆大学学报（自然科学版）》2016年第6期127-134,共8页Journal of Chongqing University

基　　金：中国石油化工股份有限公司重点科技攻关项目(P14105);天津市应用基础与前沿技术研究计划重点项目(15JCZDJC37900);天津市科技计划项目(15YFXQGX00070)~~

摘　　要：以天然石墨粉为原料,采用改进的Hummers法制备氧化石墨烯,将得到的氧化石墨烯水分散液在超声中进行超声破碎,可以得到不同尺寸的氧化石墨烯片,再采用离心工艺进行离心分离,最后得到尺寸分布较窄的氧化石墨烯纳米片。对大量的氧化石墨烯扫描电子显微镜照片进行统计分析发现,通过调整超声功率、超声时间、离心转速和离心时间可以有效地调控得到的氧化石墨烯纳米片的片径尺寸。最后,采用优化后的工艺参数,超声离心工艺制备出了平均片径尺寸约为100nm的氧化石墨烯纳米片,其中尺寸小于100nm氧化石墨烯纳米片的含量超过了60%。Graphene oxide（GO） was prepared by modified Hummers method utilizing natural graphite powders. The obtained GO was dispersed in water and broken into small pieces with different sizes by ultrasonication. Then, the GO dispersion was separated by centrifugation. At last, more uniform graphene oxide nanosheets were obtained. Through statistical analysis of the size of GO, based on vast of field emission scanning electron microscope （FE-SEM） images, it is can be found that the size of GO could be effectively controlled by adjusting ultrasonication power, ultrasonication time, centrifugation speed and centrifugation time. With the optimized parameters of ultrasonication-centrifugation （UC） process, GO nanosheets with an average size of about 100 nm were synthesized, and the content of GO nanosheets smaller than 100 nm was more than 60%.

关 键 词：氧化石墨烯 纳米片 超声 离心 

分 类 号：TB34[一般工业技术—材料科学与工程] O163.71[理学—数学]