Method for preparing three-dimensional ordered microporous carbon in large scale at low temperature

Abstract

The invention relates to a method for preparing three-dimensional ordered microporous carbon in large scale at a low temperature. The method comprises a cobalt ion exchange zeolite template and 400 DEG C low-temperature chemical vapor deposition treatment, and a synthetic material inherits the three-dimensional ordered microporous structure of the original zeolite template and has the characteristics of high BET specific surface area, large pore volume and a three-dimensional ordered microporous structure. In a chemical vapor deposition stage, an organic carbon source gas is directly introduced and maintained at a low temperature of 400 DEG C to form a carbon-zeolite compound. In the graphitization stage, a non-reactive gas is introduced into the carbon-zeolite composite maintained at the graphitization temperature to form a graphitized carbon-zeolite composite. The three-dimensional ordered microporous carbon is released by introducing a strong inorganic acid mixture into the graphitized carbon-zeolite compound. In the low-temperature CVD treatment process at 400 DEG C, large-scale preparation of the three-dimensional ordered microporous carbon can be realized by increasing the use amount of the zeolite template.

Description

technical field [0001] The invention relates to the technical field of preparation of inorganic non-metallic nanometer materials, in particular to a method for large-scale preparation of three-dimensional ordered microporous carbon at low temperature. Background technique [0002] Nanoporous carbon is one of the research hotspots in the fields of physics, chemistry and materials science. In the past 30 years, a large number of new carbon nanomaterials with unique structures and properties have emerged, including carbon nanotubes, graphene, graphyne, graphene-like porous carbon, carbon nanocages, etc. Practical and potential applications of nanoporous carbons in catalysis, energy, environment, sensors, and optoelectronic devices have attracted great interest in academia and industry. Essentially, various properties of nanoporous carbon materials are closely related to their nanostructures. At present, researchers have done a lot of work on the control of nanostructures, esp...

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Problems solved by technology

[0006] However, the introduction of water vapor in CVD makes the experimental setup too complicated, and water vapor will cause problems such as degradation of the carbon structure and corrosion of equipment.

In addition, the high temperature of 600°C leads to high energy consumption and affects the cost of mass production, which needs to be improved urgently.

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