Preparation method of carbon nanofiber film without metal catalyst

Abstract

The invention discloses a method for preparing a carbon nanofiber film without a metal catalyst. It first immerses the aluminum flakes in the copper nitrate aqueous solution, takes them out and dries them, then puts the obtained aluminum flakes loaded with copper nitrate on the surface in a ceramic container, and covers them with fragments of ceramic products. After that, the obtained bottoms are successively The ceramic container covered with copper nitrate-loaded aluminum flakes and ceramic product fragments is placed in a mixed atmosphere of acetylene and argon at 420-460°C for 20-40h, and the product is obtained on the surface of the ceramic container and ceramic product fragments . It not only produces carbon nanofiber films without metal catalysts, but also has the characteristics of low cost, large output, and easy industrial scale production. It can also realize the recycling of various ceramics and construction waste, thereby reducing environmental pollution; The prepared product has the characteristics of light weight, hydrophobicity and good mechanical properties, and is extremely easy to be widely commercialized and applied in the field of cleaning up various oil spills.

Description

technical field [0001] The invention relates to a method for preparing a carbon nanofiber film, in particular to a method for preparing a carbon nanofiber film without a metal catalyst. Background technique [0002] Carbon nanofiber films, which have the advantages of light weight, large specific surface area, high electrical conductivity, and strong chemical and mechanical stability, have a wide range of applications in the fields of high-capacity oil absorbents, electrochemical catalyst supports, supercapacitors, and lithium-ion batteries. application. At present, the preparation methods of carbon nanofiber films mainly include electrospinning, hydrothermal, carbonization of biomass materials, electrolysis and chemical vapor deposition. Compared with other methods, chemical vapor deposition has the advantages of simple operation, strong controllability, Low cost and other advantages. As in "Large-scale synthesis, annealing, purification, and magnetic properties of crysta...

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Problems solved by technology

However, the disadvantage of this method is that the transition metal catalyst particles inside the carbon nanofibers are difficult to completely remove even with highly corrosive strong acids, which limits the application range of this carbon nanofiber film.

Although this method obtains a carbon nanofiber film without any metal catalyst, it is difficult to achieve a metal catalyst-free film due to the rough surface of strontium titanate ceramics that requires expensive argon ion etching equipment to process. Low-cost and large-scale production of carbon nanofiber films

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