Effect of Reaction Temperature on the Morphology of Carbon Nanofibers

Effect of Reaction Temperature on the Morphology of Carbon Nanofibers
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反应温度对碳纳米纤维形貌的影响

DOI:
10.4028/www.scientific.net/amr.306-307.1247
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发表时间:
2011-08
期刊:
Advanced Materials Research
影响因子:
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其他
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以纳米镍为催化剂,在不同反应温度下催化裂解乙炔制备了不同形貌的纳米碳纤维。实验结果表明,温度是控制碳纤维尺寸和形态的关键参数。在400 °C下形成从镍颗粒发出的双螺旋纤维和线性分叉纤维;而在450 °C、500 °C和550 °C的反应温度下仅获得线性碳纳米纤维。在低温下,镍纳米颗粒保留在两根纤维的中间,而在高温下,镍颗粒位于线性纤维的一端。
Carbon nanofibers with various morphologies were synthesized by the catalytic pyrolysis of acetylene using nickel catalyst nanoparticles at different reaction temperatures. Experimental results demonstrate that temperature is a critical parameter for controlling the size and morphology of carbon fibers. Twin coiled fibers and linearly bifurcating fibers emanating from nickel particles were formed at 400 °C; whereas, only linear carbon nanofibers were obtained at reaction temperatures of 450 °C, 500 °C, and 550 °C. At low temperatures, nickel nanoparticles remain in the middle of two fibers, while nickel particles are positioned at one end of the linear fibers at high temperatures.
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