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论文类型：期刊论文

发表时间：2015-03-01

发表刊物：CHEMICAL VAPOR DEPOSITION

收录刊物：SCIE、EI、Scopus

卷号：21

期号：1-3

页面范围：78-83

ISSN号：0948-1907

关键字：Carbon microcoils; Carbon nanocoils; Catalyst precursor; Growth mechanism; NiSO4

摘要：A mixture of carbon micro-and nanocoils (CMCs/CNCs) is synthesized by catalytic pyrolysis of acetylene at 650 degrees C using NiSO4 as the catalyst precursor. The morphology of the grown product is analyzed by scanning electron microscopy (SEM). Experimental results indicate that, in general, the CMCs are in double-helical form, while most of the grown CNCs are in twisted single-helical form. The coil diameters of CMCs and CNCs are approximately 4 to 10mm and 300 to 400 nm, respectively. Raman spectra indicate that the real active catalyst precursor for growing CMCs/CNCs is NiSO4, while NiO is not an effective catalyst precursor for synthesizing CMCs or CNCs.