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Lanthanum doped catalyst for preparing carbon nano tube with uniform diameter and preparing process thereof

A technology of doping carbon nanotubes and lanthanum, which is applied in the field of catalysts for preparing carbon nanotubes, can solve problems such as the uniformity of carbon nanotubes, and achieve the effects of good repeatability, high catalytic efficiency, and simple process

Inactive Publication Date: 2007-04-04
上海华实纳米材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the key to the preparation of carbon nanotubes by CCVD is the preparation technology of the catalyst. The carbon nanotubes prepared by different catalysts have different shapes and properties. One of the problems is the uniformity of carbon nanotubes, because the carbon nanotubes Performance is very closely related to its pipe diameter

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  • Lanthanum doped catalyst for preparing carbon nano tube with uniform diameter and preparing process thereof

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Embodiment 1

[0020] A lanthanum-doped catalyst for preparing uniform diameter carbon nanotubes, which uses magnesium oxide as a carrier, and the carrier is loaded with a binary compound of oxides of nickel and cobalt, oxides of lanthanum and oxides of molybdenum, four The molar ratio of nickel and cobalt is 105:10:5:120, the molar ratio of nickel and cobalt in the binary compound of nickel and cobalt oxide is 6:4, the nickel and iron in the binary compound of nickel and iron oxide The molar ratio of iron and cobalt in the binary composite of oxides of iron and cobalt is 0.1:1.0, the molar ratio of iron and cobalt is 1.0:0.1, and the molar ratio of iron, cobalt and nickel in the ternary composite of oxides of iron, cobalt and nickel The ratio is 0.1:0.5:1.0.

Embodiment 2

[0022] A lanthanum-doped catalyst for preparing uniform diameter carbon nanotubes, which uses magnesium oxide as a carrier, and the carrier is loaded with a binary compound of oxides of nickel and cobalt, oxides of lanthanum and oxides of molybdenum, four The molar ratio of nickel and cobalt in the binary compound of nickel and cobalt oxide is 10:1:0.25:12.5, the molar ratio of nickel and cobalt in the binary compound of nickel and iron oxide is 5:5, the nickel and iron in the binary compound of nickel and iron oxide The molar ratio of iron and cobalt in the binary composite of oxides of iron and cobalt is 1.0:0.5, the molar ratio of iron and cobalt in the oxide of iron, cobalt, and nickel is 1.0:0.8, and the molar ratio of iron, cobalt, and nickel in the ternary composite of oxides of iron, cobalt, and nickel The ratio is 0.4:0.6:1.0.

Embodiment 3

[0024] A lanthanum-doped catalyst for preparing uniform diameter carbon nanotubes, which uses magnesium oxide as a carrier, and the carrier is loaded with a binary compound of oxides of nickel and cobalt, oxides of lanthanum and oxides of molybdenum, four The molar ratio of nickel and cobalt in the binary compound of nickel and cobalt oxide is 15:1:0.1:8, the molar ratio of nickel and cobalt in the binary compound of nickel and cobalt oxide is 4:1, the nickel and iron in the binary compound of nickel and iron oxide The molar ratio of iron and cobalt in the binary composite of iron and cobalt oxide is 0.5:0.5, the molar ratio of iron to cobalt in the oxide of iron and cobalt is 0.1:1.0, the molar ratio of iron, cobalt and nickel in the ternary composite of iron, cobalt and nickel oxide The ratio is 0.1:1.0:0.1.

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Abstract

The invention discloses a method for preparing a lanthanum doping catalyst, which is used in making the uniform caliber carbon nanometer tube. The catalyst uses magnesia as the carrier, uses the oxide which is compounded with cobalt, iron, nickel or the two of them as the composite metal oxide component, uses the oxide of lanthanum as the doping component, and uses the oxide of molybdenum as the catalytic promoter. The method comprises: a) dissolving the magnesium salt in the distilled water, b) adding the composite metal oxide component, the lanthanum doping component salt and the catalytic promoter, making them dissolved absolutely, wherein the molar ratio of the four is: 0.5~3.0:0.1~1.0:0.01~1.0:0.5~3.0, c) drying said solution in 120-200 DEG C for 3-5 hours, calcining in 550-850 DEG C for 10-30 minutes, d) grinding them to powder and getting the catalyst, which can be used for producing the carbon nanometer tube with uniform caliber.

Description

technical field [0001] The invention relates to a catalyst for preparing carbon nanotubes, in particular to a lanthanum-doped catalyst and a preparation method for preparing carbon nanotubes with uniform diameters. Background technique [0002] Carbon nanotubes are a new type of carbon structure discovered in the 1990s. They have excellent mechanical, mechanical, electronic, optical, thermal and energy storage properties, which have attracted considerable attention. It has potential wide application in many fields. Using its excellent mechanical, mechanical and electrical properties, adding it to various metal, non-metal or polymer materials can enhance the various properties of the material and improve its conductivity; using its excellent electron-emitting properties, A field emission flat panel display with low driving voltage can be obtained; micro-electromechanical system design can be carried out by using its nano-sized and conductive properties; using its unique cavi...

Claims

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Application Information

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IPC IPC(8): B01J23/83B01J23/88C01B31/02
Inventor 黄德欢施新华孔凡志丁建设周泽华
Owner 上海华实纳米材料有限公司