A kind of preparation method of polyacetate titanium oxide precursor sol spinning solution and titanium oxide nanofiber photocatalyst

Abstract

The invention relates to a polyvinyl acetate oxotitanium precursor sol spinning solution and a preparation method of a titanium oxide nano fiber photocatalyst. The preparation method comprises the following steps: preparing a polyvinyl acetate oxotitanium precursor sol spinning solution, electrostatically spinning, and thermally treating; to be specific, tetrabutyl titanate and glacial acetic acid are used as raw materials to prepare a polyvinyl acetate oxotitanium precursor, and then the precursor, aids and solvent are uniformly mixed according to a certain ratio to obtain a spinning solution; the spinning solution is prepared into polyvinyl acetate oxotitanium precursor fibers by virtue of an electrostatic spinning technology; and the precursor fibers are thermally treated in a muffle furnace to obtain solid titanium oxide nano fibers or mesoporous titanium oxide nano fibers. The method has the characteristics of simple process flow, excellent fiber quality, environmental friendliness and the like, the industrialized production is facilitated, and the obtained titanium oxide nano fibers have excellent catalytic performance and can be used as a photocatalytic material for degrading organic pollutants.

Description

technical field [0001] The invention relates to a method for preparing titanium oxide nanofibers in combination with an electrospinning technology, in particular to a method for preparing a poly-titanyl acetate precursor sol spinning solution, and belongs to the technical field of nano functional materials. Background technique [0002] With the rapid development of industry, the pollution of the environment by harmful gases, solid waste and sewage has become one of the great challenges facing the world. Water resources are one of the indispensable material bases for human to maintain life and develop economy. At present, the amount of sewage discharged from industries such as textiles and dyes is increasing, and water pollution is becoming more and more serious. Due to the high stubbornness and complex molecular structure of dyes, it is extremely difficult to degrade and mineralize, which seriously affects human survival and development. The effective treatment of pollutan...

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Problems solved by technology

CN100581648A discloses a preparation method of titanium dioxide fiber membrane prepared by electrospinning technology, wherein the preparation of spinning solution is to dissolve tetrabutyl titanate in absolute ethanol, and suppress the growth of tetrabutyl titanate with ethanol Hydrolysis, and then use hydrochloric acid to adjust the pH value of the ethanol solution of tetrabutyl titanate to control the hydrolysis and polycondensation process of the solution after adding water. However, the solution undergoes a series of hydrolysis and polycondensation to form a spinnable solution. The process is relatively slow, and the solution is adjusted with hydrochloric acid pH value, Cl in the prepared fiber membrane - It is difficult to remove in the process of post-processing, which will inevitably have a certain impact on the performance of the fiber

In the published articles on the preparation of titanium oxide nanofibers by electrospinning technology, titanium alkoxide is generally used for the preparation of spinning solution, and a solution with better spinnability is often obtained by adding a large amount of spinning aids. , due to the large amount of spinning aid, the solid content of the active ingredient titanium oxide in the precursor fiber will be too low, which will adversely affect the properties of the obtained titanium oxide nanofibers

[0005] At present, there are at least two problems in the preparation of titanium oxide nanofibers by electrospinning technology: one is that the specific surface area of ​​titanium oxide nanofibers obtained by electrospinning is not high, and the application performance is limited to a certain extent. The porosity and specific surface area inside titanium nanofibers should be a big problem to be solved

Second, the mechanical properties of the electrospun titania nanofibers prepared after high temperature treatment are very poor, easy to break, and often exist in the form of short fibers or nanowires, which cannot fully utilize the advantages of nanofibers to obtain continuous and better mechanical properties. Titanium oxide nanofibers should also be a major problem to be solved

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