Carbon nanotube aerogel (CNT aerogel) was synthesized through the catalytic decomposition of toluene in the mixture of ferrocene and thiophene through floating catalyst chemical vapor deposition method. This study described the effect of (Ar and H₂) carrier gas flow rate on the quality and yield of CNT aerogel. Results indicated that the flow rate of the gas was an important parameter which helped in determining the yield and quality of the CNTs. The CNTs are multiwalled with its diameter decreased when the H₂ flow rate was increased. Scanning electron microscopy indicated the average diameter of ≈ 31, 30, 27, 26, 18, and 15 nm when the H₂ flow rate was increased from 400, 450, 500, 550, 600, 650 sccm, respectively. Furthermore, elemental analysis with energy dispersion spectrum for CNT aerogel produced at 600 sccm resulted in a 96.22 wt% carbons along with 3.78 wt% iron in the CNT aerogel sample. Results indicated that a hydrogen flow rate of 600 sccm produced high yield and good CNTs morphology.

中文翻译：

---

使用浮动催化剂化学气相沉积直接合成碳纳米管气凝胶：气体流速的影响

碳纳米管气凝胶（CNT aerogel）是通过浮动催化剂化学气相沉积法通过催化分解二茂铁和噻吩中的甲苯而合成的。这项研究描述了（Ar和H ₂）载气流速对CNT气凝胶质量和产率的影响。结果表明，气体流速是一个重要参数，有助于确定CNT的收率和质量。碳纳米管是多壁的，其直径随H ₂流速的增加而减小。扫描电子显微镜显示，当H ₂时，平均直径约为31、30、27、26、18和15 nm流速分别从400、450、500、550、600、650 sccm增加。此外，对在600 sccm下生产的CNT气凝胶进行了能量分散谱元素分析，结果得出CNT气凝胶样品中的碳含量为96.22 wt％，铁含量为3.78 wt％。结果表明，氢气流速为600 sccm可产生高产率和良好的CNTs形态。