摘要
采用流化床法,以Fe/13X分子筛作为催化剂载体,催化裂解正己烷制备出定向排列的、较纯的单壁碳纳米管。利用TEM、HRTEM、TG和Raman对产物进行了表征,对不同浸泡时间Fe/13X分子筛制成的单壁碳管的含量和分子筛的负载量进行了分析,研究了催化剂铁负载量对单壁碳纳米管的产量和直径的影响。结果表明,单壁碳纳米管产量受催化剂含量和活性的共同影响,且在一个特定催化剂负载量下碳管产量可以达到最高,而其直径变化不大,且不受催化剂负载量的影响。
High-purity, aligned single-walled carbon nanotubes （SWNTs） were synthesized using Fe/13X molecular sieve as catalyst carrier by fluidized bed method. Hexane was used as carbon precursors in the synthesis. The SWNTs were grown using Fe/13X molecular sieve soaking of different time. The as-synthesized SWNTs were characterized by TEM, HRTEM,TG and Raman spectra. The influence of catalyst load on the yield and diameters of SWNTs was investigated, The results showed that the yield of SWNTs were strongly affected by both the load and activity of catalyst. The yield of SWNTs can reaches maximum under a special amount of catalyst. But the diameters of SWNTs are hardly changed or are not affected by the load amount of catalyst. Under both the activity and load of catalyst influnenees, the proper soaking time for Fe/13X molecular sieve was 24h in this study. The yield of SWNTs can reaches the highest 200%, at the same time, the distribution of the diameters of SWNTs was evenly.
出处
《化工新型材料》
CAS
CSCD
北大核心
2006年第4期11-13,共3页
New Chemical Materials
基金
国防重大基础研究(J1500E002)
关键词
单壁碳纳米管
流化床法
13X分子筛
single-walled carbon nanotube,fluidized bed method,13X molecular sieve
