High yield synthesis of helical carbon nanotubes catalyzed by porous precursor with terrace morphology

    Authors

    Q. Yang; Q. Wang; D. C. Wang; X. L. Xu; M. Jiang; Z. W. Zhou; J. H. Gou;D. Hui

    Comments

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    Abbreviated Journal Title

    Diam. Relat. Mat.

    Keywords

    Helical carbon nanotubes; Catalyst precursor; Chemical vapor deposition; (CVD); Yield; Multilayered structure; LARGE-SCALE SYNTHESIS; MICROWAVE-ABSORPTION PROPERTIES; CHEMICAL-VAPOR-DEPOSITION; MAGNETIC-PROPERTIES; NANOFIBERS; STRAIGHT; MECHANISM; GROWTH; ARRAYS; Materials Science, Multidisciplinary

    Abstract

    Superfine and uniformly dispersed catalyst precursor was obtained through a novel precipitation/sol-gel/reduction technique, which had multi-scale multi-layered porous structures with large surface areas. Helical carbon nanotubes (HCNTs) with good purity were then synthesized through chemical vapor deposition (CVD) by acetylene decomposition over the as-obtained precursor. The yield of the HCNTs was nearly three times of the highest value ever reported. The high yield and good quality of the HCNTs was attributed to the peculiar structures of the precursor that could decompose into catalyst with large surface area and high activity. Furthermore, the structures and catalytic efficiencies of the catalyst precursors prepared through other two different approaches were also investigated to reveal the relationship between the structures of the precursor and their capability differences in catalyzing the HCNTs growth. (C) 2014 Elsevier ay. All rights reserved.

    Journal Title

    Diamond and Related Materials

    Volume

    50

    Publication Date

    1-1-2014

    Document Type

    Article

    Language

    English

    First Page

    123

    Last Page

    128

    WOS Identifier

    WOS:000346546200018

    ISSN

    0925-9635

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