Carbon nanotube/silicon carbide foam catalytic composite material and preparation method thereof

Abstract

The invention provides a carbon nanotube / silicon carbide foam catalytic composite material and a preparation method thereof, and belongs to the technical field of composite materials and preparation thereof. The preparation method of the invention comprises the following steps: firstly pretreating the silicon carbide foam; then loading a Fe-Mg-Al composite catalyst on the pretreated silicon carbide foam by a coprecipitation method; performing in-situ growth of carbon nanotubes on the silicon carbide foam surface loaded with the catalyst by a chemical vapor deposition method. According to the composite material prepared by the method, carbon nanotubes are uniformly loaded on the silicon carbide carrier surface loaded with the composite catalyst, and cover the surface; the carbon nanotubes wind with each other to form a reticulate structure. The invention realizes macroscopic assembly of carbon nanotubes; the prepared composite material has good mechanical strength, can resist pressure drop in a catalytic reactor, prevent deficiency in strength of loose carbon tubes, and realize industrial application of carbon tubes with respect to catalysis.

Description

technical field [0001] The invention belongs to the technical field of composite materials and preparation thereof, and in particular relates to a carbon nanotube / foamed silicon carbide catalytic composite material and a preparation method thereof. Background technique [0002] Nanocarbon is a new type of carbon material, which has potential applications in many fields. Carbon nanotube is also a kind of nano carbon material. Since carbon tubes were discovered by Iijima in 1991, this nanomaterial with unique mechanical, thermal and electrical properties has aroused great research enthusiasm from researchers from all over the world. The researchers found that, in addition to potential applications in field-effect transistors, hydrogen storage devices, supercapacitors and engineering materials, carbon nanotubes are also a new type of carbon-based catalysts. Studies have found that carbon nanotubes exhibit good catalytic performance in catalytic reactions such as the oxidativ...

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Problems solved by technology

However, carbon nanotubes have a good graphitized structure, and their mechanical properties are generally higher than those of carbon nanofibers. The density of carbon nanotube coils obtained by the same method is low and requires secondary treatment, which greatly increases the ability of carbon nanotubes to form macrostructures. difficulty

At the same time, the carbon nanotube coil structure will face the difficulty of separation in the liquid phase reaction

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