Preparation method of high-specific-surface porous TiO2 nano-fiber

A nanofiber, high specific surface technology, applied in the field of photocatalytic materials, can solve the problems of complex process and high preparation cost, and achieve the effects of high photocatalytic stability and chemical stability, and high photocatalytic activity.

Inactive Publication Date: 2014-04-23
LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation methods of these porous fibers all have the disadvantages of complex process and high prepa

Method used

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  • Preparation method of high-specific-surface porous TiO2 nano-fiber
  • Preparation method of high-specific-surface porous TiO2 nano-fiber
  • Preparation method of high-specific-surface porous TiO2 nano-fiber

Examples

Experimental program
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Effect test

Embodiment 1

[0033] First, weigh 2.0 g of polyvinylpyrrolidone (PVP) and dissolve it in 15 g of dimethylformamide (DMF), and stir until the PVP is completely dissolved to obtain a transparent and clear solution. Take 5.68g of isobutyl titanate (TIP) and 2.4g of acetic acid and stir and mix to obtain another transparent and clear solution, then mix the above two solutions and stir evenly. Then add 1.38g tetraethyl orthosilicate solution and stir well to obtain the required electrospinning precursor solution, inject the precursor solution into a 10ml medical syringe for electrospinning. After electrospinning, the obtained electrospun product is placed in a muffle furnace for roasting to obtain a dual-phase SiO 2 (20wt%) / TiO 2 (80wt%) nanofibers, see figure 1 . A little biphasic SiO after roasting 2 / TiO 2 The nanofibers were placed into a vial containing NaOH (5M) solution, and then the vial was placed at 80 o C oven for 24 hours. Then filter and wash the nanofibers treated by NaOH et...

Embodiment 2

[0035] Weigh 2.0 g of polyvinylpyrrolidone (PVP) and dissolve it in 15 g of dimethylformamide (DMF), and stir until the PVP is completely dissolved to obtain a transparent and clear solution. Take isobutyl titanate (TIP) 7.82g and acetic acid 2.4g and stir and mix to obtain another transparent and clear solution, then mix the above two solutions and stir evenly. Then add 1.38g tetraethyl orthosilicate solution and stir well to obtain the desired quiet Electrospinning precursor solution, inject the precursor solution into a 10ml medical syringe for electrospinning. After electrospinning, the obtained electrospun product is put into a muffle furnace for roasting treatment to obtain biphasic SiO 2 (30wt%) / TiO 2 (70wt%) nanofibers. A little SiO after roasting 2 / TiO 2 The composite nanofibers were placed into a vial containing NaOH (5M), and then the vial was placed at 80 o C oven for 24 hours. Then filter and wash the nanofibers treated by NaOH etching to neutrality, an...

Embodiment 3

[0037] Weigh 2.0 g of polyvinylpyrrolidone (PVP) and dissolve it in 15 g of dimethylformamide (DMF), and stir until the PVP is completely dissolved to obtain a transparent and clear solution. Take 8.75g of isobutyl titanate (TIP) and 2.4g of acetic acid and stir and mix to obtain another transparent and clear solution, then mix the above two solutions and stir evenly. Then add 1.38g tetraethyl orthosilicate solution and stir well to obtain the required electrospinning precursor solution, inject the precursor solution into a 10ml medical syringe for electrospinning. After electrospinning, the obtained electrospun product is placed in a muffle furnace for roasting to obtain a dual-phase SiO 2 (40wt%) / TiO 2 (60wt%) nanofibers. A little SiO after roasting 2 / TiO 2 The composite nanofibers were placed into a vial containing NaOH (5M), and then the vial was placed at 80 o C oven for 24 hours. Then filter and wash the nanofibers treated by NaOH etching to neutrality, and then a...

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Abstract

The invention relates to the field of photocatalytic materials, and in particular relates to a preparation method of a high-specific-surface porous TiO2 nano-fiber. According to the preparation method, the nano-fiber is obtained by dissolving out SiO2-phase nano-particles in a double-phase SiO2-TiO2 electrostatically-spun nano-fiber by adopting a solvent dissolution method, wherein the solvent is one of sodium hydroxide, potassium hydroxide, barium hydroxide, calcium hydroxide, cesium hydroxide or hydrofluoric acid. The preparation method disclosed by the invention regulates the dissolution rate of SiO2 in the double-phase SiO2-TiO2 nano-fiber by means of regulating the pH value, temperature, concentration and dissolution time of the solvent so as to regulate the appearance of a microstructure of the nano-fiber. The double-phase SiO2-TiO2 nano-fiber is prepared by mixing organism precursors of titanium and silicon, adding high polymer, performing electrostatic spinning, and then roasting by adopting a roasting method. The preparation method disclosed by the invention is simple in process and low in preparation cost, the target product has high photocatalytic activity and porosity, and the pore size distribution is centralized.

Description

technical field [0001] The field of photocatalytic materials of the present invention particularly relates to a kind of high specific surface porous TiO 2 Preparation methods of nanofibers. Background technique [0002] In 1972, Japanese scientist Fujishima first discovered TiO 2 The material has certain redox characteristics under the irradiation of light. After the phenomenon that it can not only decompose water but also decompose other substances, people have found a more environmentally friendly and effective solution to the increasingly serious pollution problem, that is, to make full use of TiO 2 photocatalytic degradation technology. After research, it was found that TiO 2 It has unique decomposition characteristics, it can directly decompose most of the organic poisons under the irradiation of ultraviolet light, and will not produce secondary pollutants, so scientists put TiO-based 2 His photocatalytic research is called "sunshine engineering". Especially in rec...

Claims

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Application Information

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IPC IPC(8): D01F9/10D01F11/00D01D1/02D01D5/00B01J21/06B01J35/06
Inventor 李其明于海强李芳于晓飞鲍新侠
Owner LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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