Catalytic graphitization of Mo-B-doped polyacrylonitrile(PAN)-based carbon fibers  

作　　者：徐世海 张凤英 刘绍欢 贺冬梅 蔡青云 

机构地区：[1]State Key Laboratory of Chemo/Biosensing and Chem ometrics,Hunan University

出　　处：《Journal of Central South University》2010年第4期703-707,共5页中南大学学报（英文版）

基　　金：Project(2006CB600903) supported by the National Basic Research Program of China

摘　　要：A novel carbon fiber pretreatment was proposed.Polyacrylonitrile(PAN)-based carbon fibers were first anodized in H3PO4 electrolyte to achieve an active surface,and then coated with Mo-B catalysts by immersed the carbon fibers in a uniformly dispersed Mo-B sol.The as-treated carbon fibers were then graphitized at 2 400 ℃ for 2 h.The structural changes were characterized by X-ray diffractometry(XRD),Raman spectroscopy,scanning electron microscopy(SEM) and high-resolution transmission electronic microscopy(HRTEM).The results show that much better graphitization can be achieved in the presence of Mo-B,with an interlayer spacing(d002) of 0.335 8 nm and a crystalline size(Lc) of 28 nm.A novel carbon fiber pretreatment was proposed. Polyacrylonitrile （PAN）-based carbon fibers were first anodized in H3PO4 electrolyte to achieve an active surface, and then coated with Mo-B catalysts by immersed the carbon fibers in a uniformly dispersed Mo-B sol. The as-treated carbon fibers were then graphitized at 2 400 ℃ for 2 h. The structural changes were characterized by X-ray diffractometry （XRD）, Raman spectroscopy, scanning electron microscopy （SEM） and high-resolution transmission electronic microscopy （HRTEM）. The results show that much better graphitization can be achieved in the presence of Mo-B, with an interlayer spacing （d002） of 0.335 8 nm and a crystalline size （Lc） of 28 nm.

关 键 词：polyacrylonitrile （PAN）-based carbon fibers anodization sol catalytic graphitization MO B 

分 类 号：TQ342.742[化学工程—化纤工业]