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首页> 外文期刊>Journal of industrial and engineering chemistry >Synthesis of multi-wall carbon nanotubes by Ni-substituted (loading) MCM-41 mesoporous molecular sieve catalyzed pyrolysis of ethanol
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Synthesis of multi-wall carbon nanotubes by Ni-substituted (loading) MCM-41 mesoporous molecular sieve catalyzed pyrolysis of ethanol

机译：镍取代（负载）MCM-41介孔分子筛催化乙醇热解合成多壁碳纳米管

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摘要

Ni-loading MCM-41 mesoporous molecular sieve (Ni/MCM-41) and Ni-substituted MCM-41 mesoporous molecular sieve (Ni-MCM-41) were synthesized by wet impregnation method and hydrothermal method, respectively. Their mesoporous structures were evaluated by X-ray diffraction (XRD) and N2 physical adsorption technique. Chemical vapor deposition (CVD) was employed to catalytically synthesize carbon nanotubes (CNTs) using Ni-MCM-41 or Ni/MCM-41 as catalyst via pyrolysis of ethanol at atmospheric pressure and 700 °C. The resulting carbon nanotubes were characterized by means of transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM) and Raman spectroscopy, respectively. The results show that the multi-wall carbon nanotubes (MWCNTs) were successfully obtained at 700 °C utilizing NiMCM-41 (or Ni/MCM-41) as a catalytic template by the pyrolysis of ethanol. MWCNTs obtained over Ni-MCM-41 catalyst have uniform diameter and high quality. On the other hand, the technique has great advantages such as low cost and easy operation for the preparation of carbon nanotubes.
机译：分别通过湿法浸渍法和水热法合成了载Ni的MCM-41介孔分子筛（Ni / MCM-41）和Ni取代的MCM-41介孔分子筛（Ni-MCM-41）。通过X射线衍射（XRD）和N2物理吸附技术评估了它们的介孔结构。化学气相沉积（CVD）用于通过Ni-MCM-41或Ni / MCM-41作为催化剂，通过在常压和700°C下乙醇热解来催化合成碳纳米管（CNT）。所得碳纳米管分别通过透射电子显微镜（TEM），高分辨率透射电子显微镜（HRTEM）和拉曼光谱进行表征。结果表明，以NiMCM-41（或Ni / MCM-41）为催化模板，通过乙醇的热解，成功地在700°C下获得了多壁碳纳米管。在Ni-MCM-41催化剂上获得的MWCNT具有均匀的直径和高质量。另一方面，该技术具有诸如制备碳纳米管的低成本和易于操作的巨大优点。

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