Preparation method of TiO2 nanometer fibers

A nanofiber and composite fiber technology, applied in the chemical field, can solve the problems of unsatisfactory product quality, harsh reaction conditions, high production cost, etc., achieve good photocatalytic performance, easy to obtain, and reduce production cost

Inactive Publication Date: 2015-05-27
郭琳
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing TiO 2 The preparation method of nanofibers generally reflects harsh conditions, high production costs, low productivity, and unsatisfactory product quality

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0008] Embodiment 1: TiO of the present invention 2 The preparation method of the nanofiber is characterized in that: PVP is weighed and dissolved in 10ml of absolute ethanol, and stirred at room temperature until it is dissolved into a uniform solution. Then pour 3ml of the mixed solution of n-butyl titanate and acetic acid; the volume ratio is poured into the PVP solution, and magnetically stirred for 2-8h, due to the hydrolysis of n-butyl titanate, PVP-TiO can be obtained 2 precursor solution. The prepared PVP-TiO 2 The precursor solution is added to an electrospinning device, and the voltage and the distance between the spinneret and the receiving plate are adjusted to obtain PVP-TiO with a diameter of about 400nm. 2 Composite fiber non-woven fabric; after taking off the prepared composite fiber non-woven fabric, place it in a muffle furnace, first at 90°C, keep the temperature constant for 12h, then raise the temperature at a rate of 150°C / h, and set The temperature is...

Embodiment 2

[0009] Embodiment 2: TiO of the present invention 2 The method for preparing nanofibers is characterized in that: PVP is weighed and dissolved in 30ml of absolute ethanol, and stirred at room temperature until it dissolves into a uniform solution. Then pour 7ml of the mixed solution of n-butyl titanate and acetic acid; the volume ratio is poured into the PVP solution, and magnetically stirred for 7 hours. Due to the hydrolysis of n-butyl titanate, PVP-TiO can be obtained. 2 precursor solution. The prepared PVP-TiO 2 The precursor solution is added to an electrospinning device, and the voltage and the distance between the spinneret and the receiving plate are adjusted to obtain PVP-TiO with a diameter of about 500nm. 2 Composite fiber non-woven fabric; After taking off the prepared composite fiber non-woven fabric, place it in a muffle furnace, first at 90°C, keep the temperature constant for 8-20h, then raise the temperature at a rate of 150°C / h, and respectively Keep the t...

Embodiment 3

[0010] Embodiment 3: TiO of the present invention 2 The preparation method of the nanofiber is characterized in that: PVP is weighed and dissolved in 40ml of absolute ethanol, and stirred at room temperature until it is dissolved into a uniform solution. Then pour 2ml of the mixed solution of n-butyl titanate and acetic acid into the PVP solution with a volume ratio of 8h, and due to the hydrolysis of n-butyl titanate, PVP-TiO can be obtained. 2 precursor solution. The prepared PVP-TiO 2 The precursor solution is added to an electrospinning device, and the voltage and the distance between the spinneret and the receiving plate are adjusted to obtain PVP-TiO with a diameter of about 300nm. 2 Composite fiber non-woven fabric: After taking off the prepared composite fiber non-woven fabric, put it in a muffle furnace, first at 90°C, keep the temperature constant for 20h, then raise the temperature at a rate of 150°C / h, and set The temperature is 550, 800, 990 ℃ for 10h to obtain...

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Abstract

The invention discloses a preparation method of TiO2 nanometer fibers and belongs to the field of chemistry. The preparation method of the TiO2 nanometer fibers has the advantages of low cost, simple reaction conditions and high product quality. The preparation method is characterized by comprising weighing and dissolving PVP in 10-40ml of anhydrous ethanol, carrying out stirring at a room temperature to obtain a uniform solution, pouring 2-8ml of a mixed solution of tetrabutyl titanate and acetic acid into the PVP solution according to a volume ratio, carrying out magnetic stirring for 2-8h to obtain a PVP-TiO2 precursor solution because of tetrabutyl titanate hydrolysis, preparing a PVP-TiO2 composite fiber non-woven fabric with diameter of about 300-600nm, taking off the composite fiber non-woven fabric, putting it into a muffle furnace, keeping a temperature of 90 DEG C for 8-20h, carrying out heating at a heating rate of 150 DEG C / h, and respectively keeping the temperature of 550 DEG C, 800 DEG C and 990 DEG C for 5-10h to obtain the TiO2 nanometer fibers.

Description

technical field [0001] The invention belongs to the field of chemistry, specifically, the invention relates to a TiO 2 Preparation methods of nanofibers. Background technique [0002] Nanoscale TiO 2 It has a strong ability to absorb ultraviolet rays and high photocatalytic activity, and is often used in cosmetics, paint dispersants, and industrial wastewater treatment. So far, nano-TiO has been successfully prepared by template method and sol-gel method. 2 particles. Nanowires, nanotubes, nanoribbons, etc. As the main method for preparing continuous nanoscale fibers, electrospinning has attracted widespread attention in recent years, and a variety of polymer melt or solution systems have been used for electrospinning. The electrospinning technology was further applied to the inorganic system. They used polyvinyl alcohol as the matrix and ethanol as the solvent as the catalyst to prepare nanofiber non-woven fabrics by electrospinning, and further calcined at different t...

Claims

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Application Information

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IPC IPC(8): D01F9/08D01F8/10D01F11/00D01D5/00
Inventor 郭琳
Owner 郭琳
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