以苯为模块自组装合成碳纳米片  

Benzene as Building Block: Self-assembly Synthesis of Carbon Nanoflakes

作　　者：徐信[1] 李志强[1] 张荻[1] 陈志新[2] 

机构地区：[1]上海交通大学金属基复合材料国家重点实验室,上海200240 [2]卧龙岗大学工学部

出　　处：《化学学报》2010年第12期1205-1209,共5页Acta Chimica Sinica

基　　金：国家自然科学基金(No.50890174);国际科技合作项目(No.2010DFA52550)资助项目

摘　　要：在300℃苯溶剂中,以无水三氯化铝为催化剂,以苯和六氯乙烷为碳源,基于傅克烷基化反应生成三氯乙烯苯,并以之为模块自组装合成了具有叠层结构的碳微米颗粒,其层片厚度为300～500nm.进而在反应体系和反应条件不变的情况下,通过引入铝粉颗粒作为基底成功地诱导出厚度为30～50nm的碳纳米片.实验结果表明,所得碳材料由纳米石墨微晶和非晶碳组成.文中探讨了叠层结构的台阶长大机制,以及碳纳米片在铝粉表面的异质形核机制.Lamellar structured carbon particles with layer thickness of 300～500 nm were synthesized through a novel route based on the self-assembly process of trichlovinyl benzene in benzene solvent at 300 ℃. In this process, benzene and hexachloroethane served as carbon sources to form trichlovinyl benzene based on Friedel-Crafts alkylation reaction in the presence of anhydrous aluminum chloride as catalyst. Under the same reaction conditions, carbon nanoflakes with thickness of 30～50 nm were induced by introduction of aluminum powders as substrate. It was also found the carbon products were composed of graphitic nanocrystallites and amorphous carbon. Moreover, the ledge growth mechanism of the lamellar structure and the heterogeneous nucleation mechanism of the carbon nanoflakes on aluminum surface were discussed.

关 键 词：苯 傅克烷基化 模块 自组装 碳纳米片 

分 类 号：TB383.1[一般工业技术—材料科学与工程]