Preparation method of AZO (Al-doped ZnO) hollow nanofibers

Abstract

The invention discloses a preparation method of AZO (Al-doped ZnO) hollow nanofibers. The preparation method comprises the following steps: stirring PVA (polyvinyl acetate) and deionized water at a certain ratio at the constant temperature into a solution A and performing electrostatic spinning, so as to obtain PVA nanofibers; placing the PVA nanofibers into an oven for heat treatment, so as to endow the PVA nanofibers with the feature of hot water resistance; preparing a mixed solution B of zinc salt and aluminum salt at a certain ratio, placing the PVA nanofibers after heat treatment into a 3-mouth flask, soaking the PVA nanofibers with deionized water, stirring the mixture at a low speed, inserting a thermometer into one side of the 3-mouth flask to monitor reaction temperature in real time, dropwise adding the solution A on the other side of the 3-mouth flask, dropwise adding 1-50mol / L alkali liquor to adjust the pH value to 5-10, controlling the pH value of the solution to be constant, taking out AZO@PVA precursor nanofiber membrane after the reaction is ended, spreading the membrane on a polyfluortetraethylene plate for indoor temperature airing, and performing high-temperature calcination, so as to obtain the AZO hollow nanofibers. The AZO hollow nanofibers obtained by the invention are stable in dimension and uniform in shape.

Description

technical field [0001] The invention relates to a method for preparing aluminum-doped zinc oxide (AZO) hollow nanofibers, belonging to the technical field of nanofibers. Background technique [0002] With the development of cities and industries and the continuous improvement of people's requirements for a clean living environment, environmental governance is under increasing pressure. By providing high-performance products, nanotechnology can significantly reduce the damage to the environment caused by existing heavy pollution sources and improve the quality of the human living environment. Nanomaterials have the characteristics of large specific surface area and light weight, and have become a research hotspot at present. They have broad application prospects and potential values ​​in the fields of photocatalysis, sensors, gas detection, battery electrodes, capacitors, biomedicine, and bionics. [0003] Chinese patent application number CN105013462A discloses a TiO with b...

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Problems solved by technology

[0003] Chinese patent application number CN105013462A discloses a TiO with both hollow and mesoporous 2 The preparation method of nanofibers is to add a certain proportion of foaming agent to the spinning precursor solution, prepare composite nanofibers through electrospinning process, and further undergo high-temperature calcination to obtain TiO with hollow structure. 2 Nanofibers; Chinese patent application number CN104451942A discloses a nanofiber with a skin-core structure prepared by coaxial spinning with polyacrylonitrile as the outer layer and tin metal salt as the inner layer, and carbon-coated by carbonization. Hollow nanofibers of tin dioxide, which can be used to make supercapacitors, but this type of nanofibers are black, and when added to light-colored materials, their dyeing is limited

In addition, tin is a heavy metal, which is easy to cause secondary pollution during use; Chinese patent application number CN103334179A discloses a method for preparing hollow nanofibers. First, PVDF nanofibers are prepared by electrospinning. Sputtering technology sprays a layer of indium oxide on its surface, and further sinters at high temperature. PVDF is removed under high temperature conditions to form indium oxide nanofibers with a hollow structure. Such nanofibers have excellent electrical properties, but there are raw materials Expensive, limited supply, high requirements for magnetron sputtering technology, high production costs, etc.

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