| Synthesis of Ni／Mg／Al Layered Double Hydroxides and Their Use as Catalyst Precursors in the Preparation of Carbon Nanotubes |
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| 作者姓名： | ZHAOYun JIAOQing-ze LIANGJi LIChun-hua |
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| 作者单位： | [1]SchoolofChemicalEngineeringandtheEnvironment,BeijingInstituteofTechnology,Beijing100081,P.R.China／／DepartmentofMechanicalEngineering,TsinghuaUniversity,Beijing100084,P.R.China [2]SchoolofChemicalEngineeringandtheEnvironment,BeijingInstituteofTechnology,Beijing100081,P.R.China [3]DepartmentofMechanicalEngineering,TsinghuaUniversity,Beijing100084,P.R.China |
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| 基金项目： | SupportedbythePostdoctoralFoundationofP.R.China[No.2003(03)]. |
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| 摘 要： | Ni/Mg/Al layered double hydroxides(LDHs) with different n(Ni) : n(Mg) : n(Al) ratio values were prepared via a coprecipitation reaction. Then Ni/Mg/Al mixed oxides were obtained by calcination of these LDHs precursors. Carbon nanotubes were produced in the catalytic decomposition of propane over the Ni/Mg/Al mixed oxide catalysts. The quality of as-made nanotubes was investigated by SEM and TEM. The nanotubes were multiwall with a high length-diameter ratio and appeared to be flexible. The catalytic activities of these mixed oxides increased with increasing the Ni content. The Ni/Mg/Al mixed oxide with the highest Ni content n( Ni)/n( Mg)/n(Al) = 1/1/1 ] showed the highest activity and the carbon nanotubes grown on its surface had the best quality.
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| 关 键 词： | 合成 晶体结构 碳纳米管 催化剂 前体物 双层氢氧化物 水滑石 镍镁铝复合氢氧化物 |
| 收稿时间： | 2004-09-16 |
Synthesis of Ni/Mg/Al Layered Double Hydroxides and Their Use as Catalyst Precursors in the Preparation of Carbon Nanotubes |
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| ZHAOYun JIAOQing-ze LIANGJi LIChun-hua.Synthesis of Ni/Mg/Al Layered Double Hydroxides and Their Use as Catalyst Precursors in the Preparation of Carbon Nanotubes[J].Chemical Research in Chinese University,2005,21(4):471-475. |
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| Authors: | ZHAO Yun JIAO Qing-Ze LIANG Ji LI Chun-hua |
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| Institution: | 1. School of Chemical Engineering and the Environment, Beijing Institute of Technology, Beijing 100081, P. R. China;
2. Department of Mechanical Engineering, Tsinghua University, Beijing 100084, P. R. China |
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| Abstract: | Ni/Mg/Al layered double hydroxides(LDHs) with different n(Ni):n(Mg):n(Al) ratio values were prepared via a coprecipitation reaction. Then Ni/Mg/Al mixed oxides were obtained by calcination of these LDHs precursors. Carbon nanotubes were produced in the catalytic decomposition of propane over the Ni/Mg/Al mixed oxide catalysts. The quality of as-made nanotubes was investigated by SEM and TEM. The nanotubes were multiwall with a high length-diameter ratio and appeared to be flexible. The catalytic activities of these mixed oxides increased with increasing the Ni content. The Ni/Mg/Al mixed oxide with the highest Ni content n(Ni)/n(Mg)/n(Al)=1/1/1] showed the highest activity and the carbon nanotubes grown on its surface had the best quality. |
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| Keywords: | Layered double hydroxide(LDH) Hydrotalcite Mixed oxide Carbon nanotube |
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