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Method for preparing fishbone-shaped nano carbon fibre for filling nano metal

A nano-carbon fiber and nano-metal technology, which is applied in the fields of fiber chemical characteristics, rayon manufacturing, textiles and paper making, etc., can solve the problems of difficult preparation, control and high price of small-diameter catalysts, and achieves the advantages of large-scale production and wide application. Prospects, the effect of high product purity

Inactive Publication Date: 2008-07-02
BEIJING UNIV OF CHEM TECH
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  • Summary
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  • Claims
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Problems solved by technology

[0003] At present, the methods reported at home and abroad for the preparation of fishbone nano-carbon fibers are mainly chemical vapor deposition (CVD). Nickel foam is used as a catalyst to prepare fishbone nano-carbon fibers. The preparation process of the above-mentioned nano-catalysts is very complicated, and the particle size is difficult to control. Generally, the salt solution of Fe, Co, Ni, Cu, etc. The surface of the particles, and then prepare nano-metal catalysts attached to the surface of ultra-fine silica and other particles by hydrogen reduction. These ultra-fine silica particles will be mixed in the nano-carbon fibers, which is difficult to remove.
It is generally believed that the diameter of carbon nanofibers is equal to the diameter of catalyst particles, and people always try to obtain catalysts with smaller particle sizes, but the preparation of small diameter catalysts is difficult and expensive, and its application is limited to a certain extent. Carbon nanofibers only have nanometals at the top, and there are no literature and patent reports on fishbone-shaped carbon nanofibers filled with nanometals uniformly inside.

Method used

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  • Method for preparing fishbone-shaped nano carbon fibre for filling nano metal

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Embodiment 1

[0013] Before the reaction, the nickel plate catalyst with a thickness of 1mm and a length and width of 200mm and 25mm was subjected to surface treatment, and the surface of the nickel plate was polished with No. 500 fine sandpaper, then soaked in dilute sulfuric acid for 5 hours, dried and placed in a tube furnace In the constant temperature zone, the nickel plate catalyst is placed horizontally on the graphite plate; the reaction system is evacuated, replaced with nitrogen three times, and nitrogen is introduced. The flow rate of nitrogen is 250ml / min. At the same time, hydrogen is used as the carrier gas to add thiophene co-catalyst, the flow rate of thiophene co-catalyst is 0.05ml / min, the ratio of diluent gas nitrogen and acetylene flow is 5:1 (wherein: acetylene is 50ml / min, nitrogen is 250ml / min), The ratio of hydrogen and acetylene flow rate is 6: 1 (wherein: acetylene is 50ml / min, hydrogen is 300ml / min), reaction constant temperature time is 60min, carries out catalyti...

Embodiment 2

[0015] Before the reaction, the nickel plate catalyst with a thickness of 1.5mm and a length and width of 200mm and 25mm was surface treated, and the surface of the nickel plate was polished with No. 500 fine sandpaper, then soaked in dilute sulfuric acid for 6 hours, dried and placed in a tubular In the constant temperature zone of the furnace, the nickel plate catalyst is placed horizontally on the graphite plate; the reaction system is evacuated, replaced with argon three times, and argon is introduced. The flow rate of argon is 360ml / min, and the temperature is raised to 800°C under an argon atmosphere. , while passing through acetylene, add thiophene co-catalyst with hydrogen as carrier gas, the flow rate of thiophene co-catalyst is 0.06ml / min, the ratio of dilution gas argon and acetylene flow is 6: 1 (wherein: acetylene is 60ml / min, argon Gas is 360ml / min), the ratio of hydrogen and acetylene flow rate is 7: 1 (wherein: acetylene is 60ml / min, and hydrogen is 420ml / min), ...

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Abstract

The invention relates to a fishbone carbon nanofiber for filling nano-metals, in particular to the preparation method of the fishbone carbon nanofiber for filling nano-metals. The invention discloses a method for preparing the fishbone carbon nanofiber for filling nano-metals. The invention can prepare the fishbone carbon nanofiber for filling nano-metals at lower temperature by chemical vapor deposition by adopting acetylene as carbon source, hydrogen gas as carrier gas, nitrogen gas or argon gas as dilution gas, nickel plate as catalyst and thiophene as co-catalyst. The inventive method has the advantages of simple process, easy control, low cost, and high output and purity, and is suitable for industrial production. The fishbone carbon nanofiber for filling nano-metal prepared by the method has the advantages of uniform diameter and high graphitization degree, and has wide application prospect in the fields of gas adsorption, catalytic reaction, structure enhancement, wave-absorbing material, electromagnetic screening material, microelectronic device, etc.

Description

technical field [0001] The invention relates to fishbone nano-carbon fibers filled with nanometer metals, in particular to a method for preparing fishbone-shaped nano-carbon fibers filled with nanometer metals. Background technique [0002] Carbon nanofiber is a kind of fiber with a diameter of less than 100 nanometers that is formed by stacking graphite layers in a certain direction. Carbon nanofibers were discovered in the 1970s. The arrangement direction of graphite layers can be parallel, perpendicular or at a certain angle to the axis of the fiber. , when the arrangement direction of the graphite layer is at a certain angle to the axis of the carbon nanofiber, it is called a fishbone carbon nanofiber. The unique fishbone structure of the fishbone nanocarbon fiber makes it an attractive potential value in gas adsorption applications. In addition to the advantages in gas adsorption, the fishbone-like carbon nanofibers filled with nano-metals also have great potential appl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/127D01F1/10
Inventor 赵东林沈曾民于建民
Owner BEIJING UNIV OF CHEM TECH
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