微晶纤维素CVD法制备碳材料工艺研究

Technical research on the preparation of carbon material from cellulose by CVD method

以微晶纤维素为碳源,以二茂铁为催化剂前驱体,采用化学气相沉积法制备碳材料。在确定流量的氮气气氛中,考察了催化剂含量和反应时间对产物形貌的影响。采用扫描电镜（SEM）、X射线衍射仪（XRD）及红外光谱仪（FT-IR）对产物的微观形貌和表面官能团进行了表征与分析。结果显示：当气体流速为0.15L/min,催化剂含量为5%（质量分数,下同）,900℃反应2min时,产物为粒径在200-500nm表面光滑的微米球;催化剂含量为30%,900℃高温反应2min时,生成大量弯曲且相互缠绕的直径约30nm的碳纳米管。

Using cellulose as carbon source and ferrocene as catalyst,carbon materials were synthesised by chemical vapor deposition in nitrogen atmosphere at certain gas rate.The influences of different growth parameters on morphology,such as ferrocene content and reaction time were investigated.The microstructure and functional groups were characterized by scanning electron microscopy（SEM）,X-ray diffraction（XRD）and infra-red spectrometer（FT-IR）.The results showed that when the ferrocene content was 5%,the carbon microbeads with smooth surface were synthesised at 900℃ for2 minutes and the diameter was 200-500nm.When the ferrocene content was 30%,the carbon nanotubes with circular cross-section were synthesised at 900℃for 2minutes and the diameter was 30 nm.