Preparation method of continuous SiO2/TiO2 aerogel fiber with photocatalytic performance

Abstract

The invention relates to a preparation method of continuous SiO2 / TiO2 aerogel fiber with photocatalytic performance. The preparation method includes the steps of preparing a spinning solution from silicate or silanol sol, adding a TiO2 photocatalyst, adding the spinning solution with the TiO2 photocatalyst to an acid solution coagulating bath to conduct reaction wet method spinning to obtain original silicic acid / silicate fiber with the TiO2 photocatalyst, conducting rolling and ageing, washing the fiber with deionized water to neutral, conducting solvent replacement through deionized water or ethyl alcohol, and conducting drying to obtain the SiO2 / TiO2 aerogel fiber. The method has the advantages that raw materials are low in price and easy to obtain, the reaction process is simple, and spinnability is high; the prepared aerogel fiber has abundant pores, a high specific surface area, high temperature resistance and chemical corrosion resistance, the specific surface area and TiO2 content of the fiber can be adjusted, and the method has application prospects in the field of photocatalysis and the like.

Description

technical field [0001] The invention belongs to the field of airgel fiber and its preparation, in particular to a continuous SiO with photocatalytic properties 2 / TiO 2 Preparation method of airgel fiber. Background technique [0002] Aerogel (aerogel) refers to the medium filled in the space network structure in the gel is not a solvent but a gas, a special gel with a solid appearance, because there is almost no solvent component inside, so it is also called xerogel . Airgel is a low-density nanoporous amorphous solid material with a unique structure. The solid phase forms a spatial network structure, and the network structure and the pore structure between the networks are at the nanoscale. Because of its unique structure, airgel also has many unique properties, such as high porosity, high specific surface area, strong adsorption, low density, low acoustic impedance, low thermal conductivity, low refraction, etc. [0003] SiO 2 The high specific surface area of ​​airg...

AI Technical Summary

Problems solved by technology

Compared with zero-dimensional powders, powders are difficult to completely separate from gases or liquids. At the same time, powders will stack without external force, and the contact area with waste water and waste gas will be greatly reduced, while the utilization rate of photocatalysts stacked in the middle is very low.

[0005] Current research on continuous SiO with photocatalytic properties 2 / TiO 2 The literature of airgel fiber has not been reported yet

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