【摘要】 采用非芳香烃类环己烷作为碳源,通过浮游法实现了超长垂直碳纳米管(Carbon nanotube,CNT)阵列的生长。研究表明:浮游催化过程中反应温度、催化剂前体补给速度、进料速度、生长气氛等因素对CNT阵列的生长影响显著。在直径为25mm的石英反应器中,反应温度、催化剂前体二茂铁的补给速度、碳源环己烷的补给速度、反应气氛分别控制在820℃、0.24mg/min、0.12mL/min、640mL/min(H2/Ar=1∶15)的生长窗口内,实现了CNT阵列的快速协同生长。在单因素考察的基础上,通过对宏观参数的调变,可以制备出长度达5.0mm的CNT阵列。所获得的CNT取向一致,长径比大于105,纯度达到96.7%。更多还原

【Abstract】 Vertically aligned carbon nanotube(VACNT)arrays were obtained using the floating catalyst method with cyclohexane as a carbon source.Results indicated that various factors,such as growth temperature,ferrocene feed rate,feed rate of the solution(ferrocene dissolved in cyclohexane),and composition of carrier gases,had a great effect on the VACNT array growth.A maximum growth rate of the VACNT array was obtained in a quartz tubular reactor with a diameter of 25 mm when the growth temperature was 820 ℃,ferrocene feed rate 0.24 mg/min,feed rate of the solution 0.12 mL/min,and the flow rate of the H2/Ar(1∶15)carrier gas 640 mL/min.A VACNT array with a height of 5.0 mm was obtained with a large aspect ratio(>105)and a high purity(96.7%).更多还原