Method for preparing continuous SiO2/nanocrystalline metal aerogel fiber with catalytic performance by adding nanocrystalline metal in situ

Abstract

The invention relates to a method for preparing continuous SiO2 / nanocrystalline metal aerogel fiber with catalytic performance by adding nanocrystalline metal in situ. The method comprises the steps that salicate is prepared into a spinning solution, then, a nanocrystalline metal catalyst is added into the spinning solution, the spinning solution is added into coagulating bath, reaction wet spinning is conducted, orthosilicic acid / silicate fiber containing the nanocrystalline metal catalyst is obtained, winding and room temperature ageing are conducted, the orthosilicic acid / silicate fiber is washed to be neutral through deionized water, solvent replacement is conducted through deionized water or ethyl alcohol, drying is conducted, and the continuous SiO2 / nanocrystalline metal aerogel fiber is obtained. The method has the advantages that raw materials are low in price and easy to obtain, the reaction process is simple, and spinnability is good. The continuous SiO2 / nanocrystalline metal aerogel fiber with catalytic performance prepared through the method has abundant holes, and is high in specific surface area, and resistant to high temperature and chemical corrosion; the specific surface area of the fiber and the content of nanocrystalline metal in the fiber are adjustable, and the method has application prospects in catalysis and other fields.

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

Images