A method for in-situ addition of nanometals to prepare continuous SIO2/nanometal airgel fibers with catalytic properties

Abstract

The invention relates to a method for preparing continuous SiO2 / nano-metal airgel fibers with catalytic properties by adding nano-metal in situ. The method includes: preparing silicate or silicate into a spinning stock solution, then adding a nanometal catalyst, and then adding it to a coagulation bath to perform reaction wet spinning to obtain orthosilicic acid / silicate fibers containing nanometal catalysts, and winding , aged at room temperature, washed with deionized water until neutral, solvent replaced with deionized water or ethanol, and dried. The method of the invention has the characteristics of cheap and easily available raw materials, simple reaction process and good spinnability. The continuous SiO2 / nano-metal aerogel fiber with catalytic performance prepared by the present invention has abundant pores, high specific surface area, high temperature resistance, and chemical corrosion resistance. At the same time, the specific surface area of ​​the fiber and the nano-metal content in the fiber are adjustable. It is useful in catalysis, etc. The field has application prospects.

Description

technical field [0001] The invention belongs to the field of airgel preparation, in particular to a continuous SiO with catalytic performance prepared by in-situ addition of nanometer metals 2 / Nanometal airgel fiber method. Background technique [0002] In a chemical reaction, a substance that can change the chemical reaction rate of the reactants (both increase and decrease) without changing the chemical balance, and whose quality and chemical properties have not changed before and after the chemical reaction is called a catalyst. In actual production, catalysts tend to be more expensive. In order to reduce the amount of catalyst as much as possible and improve the efficiency of the catalyst, it is often necessary to enlarge its specific surface and make it into nanoparticles. In order to support the active components and make the catalyst have specific physical properties, the catalyst is often loaded on a porous material with open pores that can realize the internal tr...

AI Technical Summary

Problems solved by technology

Compared with zero-dimensional powder, the powder will stack without external support materials and external force, the contact area with methane is greatly reduced, and the utilization rate of the catalyst stacked in the middle is very low

In addition, the powder form is not convenient to use, especially in the field of liquid catalysis

[0006] Current research on continuous SiO with catalytic properties 2 / The literature of nano metal airgel fiber has not been reported yet

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