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Polyaniline modified TiO2 composite nanofiber membrane as well as preparation method and application thereof

A composite nanofiber and polyaniline technology, applied in the field of mineral composite materials, can solve the problems affecting the photocatalytic ability of TiO2, achieve the effect of improving the light response range, solving the difficulty of recycling, and improving the light quantum efficiency

Pending Publication Date: 2022-03-08
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

After ordinary glass, the ultraviolet rays are almost zero, which seriously affects the TiO 2 photocatalytic ability

Method used

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  • Polyaniline modified TiO2 composite nanofiber membrane as well as preparation method and application thereof
  • Polyaniline modified TiO2 composite nanofiber membrane as well as preparation method and application thereof
  • Polyaniline modified TiO2 composite nanofiber membrane as well as preparation method and application thereof

Examples

Experimental program
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preparation example Construction

[0030] The present invention also provides the above-mentioned polyaniline modified TiO 2 The preparation method of composite nanofibrous membrane comprises the following steps:

[0031] TiO 2 / diatomaceous earth composite material and hydrochloric acid are mixed to obtain TiO 2 / diatomite slurry;

[0032] The TiO 2 / Diatomite slurry, oxidant and aniline are mixed for oxidative polymerization to obtain active components;

[0033] mixing the active component with an organic polymer to obtain a spinning solution;

[0034] Electrospinning the spinning solution to form a film.

[0035] In the present invention, unless otherwise specified, the raw materials used in the present invention are preferably commercially available products.

[0036] In the present invention, TiO 2 / diatomaceous earth composite material and hydrochloric acid are mixed to obtain TiO 2 / Diatomaceous earth slurry.

[0037] In the present invention, the concentration of the hydrochloric acid is prefera...

Embodiment 1

[0057] 2g TiO 2 / diatomaceous earth composite material (TiO 2 / TiO in Diatomite Composite 2 The mass ratio to diatomaceous earth is 4:10) and 200mL of 1mol / L HCl aqueous solution at a temperature of 5°C and a rotation speed of 2000rpm, stirring for 30min to obtain TiO 2 / diatomite slurry, the TiO 2 / The solid content of the diatomite slurry is 1%.

[0058] TiO obtained above 2 / diatomite slurry, 0.098 g of ammonium persulfate and 20 μL of aniline were mixed, and stirred at a temperature of 5° C. and a rotation speed of 2000 rpm for 4 hours. Then, the feed liquid obtained by the oxidative polymerization was washed three times with an ethanol aqueous solution having a volume concentration of 50%, and the washed feed liquid was dried at 60° C. for 8 hours to obtain an active component.

[0059] 3.2g of polyacrylonitrile was dissolved in 20mLN,N-dimethylformamide, and continued to stir until polyacrylonitrile was completely dissolved to form a polyacrylonitrile solution; ...

Embodiment 2

[0062] The only difference between this example and Example 1 is that ① replace "0.098g ammonium persulfate and 20 μL aniline" with "0.294g ammonium persulfate solid and 60 μL aniline";

[0063] ②The reaction time of oxidative polymerization is replaced by "12h" from "4h";

[0064] ③ Modify the mass of the active component from 0.32g to 0.64g. The polyaniline modified TiO that embodiment 2 prepares 2 The thickness of the composite nanofibrous membrane is 55 μm.

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Abstract

The invention belongs to the technical field of mineral composite materials, and particularly relates to a polyaniline modified TiO2 composite nanofiber membrane and a preparation method thereof. The polyaniline modified TiO2 composite nanofiber membrane provided by the invention comprises an organic polymer membrane matrix and an active component dispersed in the membrane matrix, the active component comprises a TiO2 / diatomite composite material and polyaniline which is polymerized on the surface of the TiO2 / diatomite composite material in situ; the TiO2 / diatomite composite material comprises diatomite and TiO2 anchored on the surface of the diatomite. The polyaniline modified TiO2 composite nanofiber membrane provided by the invention can be used for purifying formaldehyde under the condition of visible light.

Description

technical field [0001] The invention belongs to the technical field of mineral composite materials, in particular to a polyaniline modified TiO 2 Composite nanofibrous membrane and its preparation method and application. Background technique [0002] At present, with the extensive use of various artificial boards, adhesives, coatings and synthetic textiles in the field of interior decoration and decoration, coupled with the airtightness of modern buildings, the problem of indoor formaldehyde pollution in my country has become more and more serious. In view of the characteristics of long-term release, low concentration and instability of indoor air pollutants such as formaldehyde, among the many formaldehyde purification methods, physical adsorption, thermal catalytic oxidation and photocatalytic oxidation are the most widely studied. Among them, photocatalytic oxidation technology is a promising indoor environmental pollution control technology. [0003] Currently TiO 2 T...

Claims

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Application Information

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IPC IPC(8): B01J31/38B01D53/86B01D53/72B01J35/06
CPCB01J31/38B01D53/8668B01D2255/802B01J35/59B01J35/39
Inventor 孙志明袁方李春全
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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