A method for preparing continuous cellulose/nanometal airgel fibers with catalytic performance after loading nanometer metals

Abstract

The invention discloses a method for preparing continuous cellulose / nano-metal aerogel fiber with catalytic performance from back-loaded nano-metal. The method comprises the following steps: preparing cellulose into a spinning solution; adding an acid solution, an ethanol solution or an acetone solution into a coagulating tank to be used as a coagulating bath; adding the spinning solution into the coagulating bath, and conducting wet spinning to obtain cellulose gel fiber; winding the obtained cellulose gel fiber, immersing the wound cellulose gel fiber into an ageing solution for ageing at the room temperature for 15 min to 1 h, washing with deionized water to be neutral, then immersing the washed cellulose gel fiber into a metal salt solution, taking out, removing a surface solvent, immersing the cellulose gel fiber into a reducing agent, washing with deionized water to be neutral, then conducting solvent replacement, and drying so as to obtain the continuous cellulose / nano-metal aerogel fiber. The prepared continuous cellulose / nano-metal aerogel fiber with catalytic performance has rich pores and high specific surface area, and meanwhile the fiber specific surface area and the content of nano metal in the fiber are adjustable.

Description

technical field [0001] The invention belongs to the field of preparation of airgel fibers, and in particular relates to a method for preparing continuous cellulose / nano metal airgel fibers with catalytic performance by post-loading nanometer metals. Background technique [0002] A catalyst is a class of substances that alter the rate of a chemical reaction without itself entering into the molecular makeup of the final product. In practical applications, catalytically active components such as gold, silver, platinum, palladium, etc. are often expensive and have low utilization rates. In order to improve the catalytic efficiency of catalysts and reduce the amount of catalytically active components, the catalytically active components are loaded on the carrier. The carrier can make the catalyst have a certain shape, size and mechanical strength, and can disperse the active components on the surface of the carrier to obtain a higher specific surface area and improve the catalyti...

AI Technical Summary

Problems solved by technology

Compared with bulk and film-like materials, fibrous materials further increase the contact area with monochloroacetic acid, and at the same time, the diffusion resistance and transmission distance of monochloroacetic acid in the material are greatly reduced, making it easier to contact palladium with the catalytic active center , improve the catalytic efficiency, and the zero-dimensional catalytic material may lead to agglomeration during use, and it is not easy to separate completely, which is easy to cause secondary pollution

At present, there is no report on the preparation of continuous cellulose / nanometal airgel fibers with catalytic properties after loading nanometals.

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