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Preparation method of photo-catalyzed collodion cellulose-based activated carbon nano-fiber composite membrane

A nanofiber and activated carbon-based technology, applied in chemical instruments and methods, alkali metal compounds, physical/chemical process catalysts, etc., can solve the problems of water yield drop, affecting the success or failure of system operation efficiency, fouling and other problems, and achieve strong adsorption performance , strong adsorption capacity and photocatalytic performance, and simple preparation process

Inactive Publication Date: 2016-03-23
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, there is more or less a fouling problem in the sewage treatment process of MF and UF membranes. Sometimes this problem is very serious, resulting in a serious drop in water yield, which directly affects the operating efficiency and success of the system.

Method used

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Examples

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Comparison scheme
Effect test

preparation example Construction

[0014] A preparation method of photocatalytic cotton gum cellulose-based activated carbon nanofiber composite film, it comprises the following steps:

[0015] 1) Titanium dioxide sol preparation: Dissolve 5-8 parts of tetra-n-butyl phthalate and 2-3 parts of glacial acetic acid in 15-25 parts of absolute ethanol in parts by mass, and stir magnetically for 2-3 hours to make them evenly mixed. Slowly drop into the mixed solution of 5-7 parts of absolute ethanol and 0.5-0.8 parts of deionized water, control the dropping speed of the burette, seal and stir to obtain light yellow Ti0 2 Transparent sol, stand and age for 2-5h;

[0016] 2) First, the traditional dilution method of adding and stirring the nanocellulose suspension made from cotton-glue fibers, and then dispersing at a high speed with a dispersant (triethylhexyl phosphoric acid) to ensure that the nanocellulose is evenly dispersed in water; then Filter the above-mentioned dilution with a filter device covered with an o...

Embodiment 1

[0020] A preparation method of photocatalytic cotton gum cellulose-based activated carbon nanofiber composite film, it comprises the following steps:

[0021] 1) Titanium dioxide sol preparation: Dissolve 5 parts of tetra-n-butyl phthalate and 2 parts of glacial acetic acid in 15 parts of absolute ethanol in parts by mass, stir magnetically for 2 hours to mix evenly, and slowly drop into 5 parts of absolute ethanol And in the mixed solution of 0.5 part deionized water, control burette drop speed, seal and stir to obtain pale yellow Ti0 2 Transparent sol, standing and aging for 2h;

[0022] 2) First, the traditional dilution method of adding and stirring the nanocellulose suspension made from cotton-glue fibers, and then dispersing at a high speed with a dispersant (triethylhexyl phosphoric acid) to ensure that the nanocellulose is evenly dispersed in water; then Filter the above-mentioned dilution with a filter device covered with an organic filter membrane, and vacuum filter...

Embodiment 2

[0026] A preparation method of photocatalytic cotton gum cellulose-based activated carbon nanofiber composite film, it comprises the following steps:

[0027] 1) Titanium dioxide sol preparation: Dissolve 6 parts of tetra-n-butyl phthalate and 3 parts of glacial acetic acid in 20 parts of absolute ethanol in parts by mass, stir magnetically for 2.5 hours to mix evenly, slowly drop into 6 parts of anhydrous In the mixed solution of ethanol and 0.6 parts of deionized water, control the dripping speed of the burette, seal and stir to obtain light yellow Ti0 2 Transparent sol, standing and aging for 3h;

[0028] 2) First, the traditional dilution method of adding and stirring the nanocellulose suspension made from cotton-glue fibers, and then dispersing at a high speed with a dispersant (triethylhexyl phosphoric acid) to ensure that the nanocellulose is evenly dispersed in water; then Filter the above-mentioned dilution with a filter device covered with an organic filter membrane...

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Abstract

A preparation method of a photo-catalyzed collodion cellulose-based activated carbon nano-fiber composite membrane includes following steps: 1) dissolving tetra-n-butyl titanate and glacial acetic acid in absolute ethyl alcohol, mixing them well by magnetic stirring, dropwise adding a mixture slowly into a mixed solution of absolute ethyl alcohol and deionized water, carrying hermetic stirring to obtain a light yellow TiO2 transparent sol, and aging the sol by standing; 2) adding a nano cellulose suspension made from collodion fiber in a traditional diluting manner while stirring, and carrying high-speed dispersing using a dispersant to ensure nano cellulose is evenly dispersed in water; filtering a diluent above with a filter device on which an organic filer membrane is placed, and carrying out vacuum filtration with a vacuum pump; 3) mixing the titanium dioxide sol and the collodion cellulose solution for full reaction, carrying out stirring until they are fully mixed and a transparent solution is obtained, and carrying out electrostatic spinning to obtain TiO2 / collodion cellulose-based composite nano-fiber membrane; 4) drying the composite nano-fiber membrane at room temperature, transferring the membrane to a vacuum drying box for drying, and opening the box after drying to obtain a finished product.

Description

technical field [0001] The invention relates to a photocatalytic cotton gum cellulose-based activated carbon nanofiber composite film and a preparation method thereof, belonging to the preparation technology of activated carbon composite materials. Background technique [0002] Traditional printing and dyeing wastewater treatment methods are not ideal, mainly because the molecular structure of dyes in wastewater is stable, the composition is complex, the decolorization rate and COD removal rate are not high, and secondary pollution is easy to occur. Using the photocatalytic properties of semiconductor materials, many organic substances that cannot be removed by chemical and biological methods can be completely decomposed into carbon dioxide and water at room temperature without causing secondary pollution. It can be used as sunlight and ultraviolet light contained in fluorescent lamps. excitation source. At present, among the catalysts used to degrade environmental pollutan...

Claims

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Application Information

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IPC IPC(8): B01J31/38B01J21/06B01J35/06B01J20/24B01J20/28B01J20/30
CPCB01J20/06B01J20/24B01J20/28038B01J21/063B01J31/06B01J31/38B01J35/19B01J35/59
Inventor 俞颜佳万军民胡智文管继彪杨子昂
Owner ZHEJIANG SCI-TECH UNIV
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