Catalytic graphitization of Mo-B-doped polyacrylonitrile (PAN)-based carbon fibers
来源期刊：中南大学学报(英文版)2010年第4期
论文作者：徐世海 张凤英 刘绍欢 贺冬梅 蔡青云
文章页码：703 - 707
Key words：polyacrylonitrile (PAN)-based carbon fibers; anodization; sol; catalytic graphitization; Mo; B
Abstract: 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.
