-
摘要: 基于石墨/炭纳米纤维(GNFs)的克量级(﹥1g)制备及其特征表征,通过苯的喷雾热解制备了GNFs,并采用 XRD,TEM及SEM对GNFs进行了表征。结果表明:高产率GNFs的最佳生长条件是:喷管内径~0.52mm,苯液流量~5mL/min,反应温度~750℃,载气H2流量~1500mL/min。所制GNFs的典型长度和直径分别为~60μm和~250nm,大部分GNFs样品呈现螺圈/螺旋纤维状。喷雾热解生长模式中GNFs的产率为克量级(1.45g)/产程。Abstract: Gramscale (>1g) synthesis and characterization of graphitic/carbon nanofibers (GNFs) is described. The GNFs were grown by the spray pyrolysis of benzene and characterized by Xray diffraction and transmission/scanning electron microscopy. The optimum growth conditions for a high yield of GNFs were found to be a spray nozzle diameter (inner diameter) of ~0.52mm, a flow rate of benzene solution of ~5mL/min, a reaction temperature of ~750℃, and a flow rate of hydrogen, as carrier gas, of ~1500mL/min. The typical length and diameter were ~60μm and ~250nm, respectively. Most of the GNFs exhibited coiled/helicallike fibers. The yield of GNFs in the spray pyrolysis growth mode was found to be of the order of 1.45g per run.
-
Key words:
- Carbon nanofibers /
- Graphitic carbon /
- XRD /
- TEM /
- SEM
点击查看大图
计量
- 文章访问数: 2781
- HTML全文浏览量: 60
- PDF下载量: 1064
- 被引次数: 0