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Recyclable high-temperature-resistant photocatalytic film for sewage treatment and preparation method thereof

A photocatalytic film, sewage treatment technology, applied in catalyst activation/preparation, light water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of resource waste, poor heat resistance, uneven dispersion, etc. Achieve the effect of improving photocatalytic activity, good thermodynamic performance, and realizing recycling

Inactive Publication Date: 2018-11-23
成都市水泷头化工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are disadvantages such as uneven distribution of photocatalyst load and low photocatalytic activity.
[0007] To sum up, in the current commonly used photocatalytic composite membranes, the coating technology is directly used, which has the problems of poor loading of photocatalytic materials, uneven dispersion and easy agglomeration, and the poor heat resistance of the membrane affects the photocatalytic performance. Activity and sewage treatment effect, and it is difficult to effectively recycle, resulting in a waste of resources, so it is of great significance to develop a photocatalytic film that can be effectively recycled with high temperature resistance and high catalytic activity

Method used

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  • Recyclable high-temperature-resistant photocatalytic film for sewage treatment and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0030] (1) Dissolve polyimide in N,N-dimethylacetamide, add polyvinylpyrrolidone and tetrabutyl titanate, stir at high speed for 150 minutes, then add complexing agent, continue stirring for 16 minutes, and make spinning liquid; the rotating speed of high-speed stirring is 920r / min; the complexing agent is sodium gluconate; the parts by weight of each raw material are: 30 parts by weight of polyimide, 64 parts by weight of N,N-dimethylacetamide, polyvinylpyrrolidone 2 parts by weight, 3 parts by weight of tetrabutyl titanate, 1 part by weight of complexing agent;

[0031] (2) Add the spinning solution in step (1) into the electrospinning machine, and obtain the hollow fiber membrane by spinning, and at the same time, the nano-titanium dioxide generated in situ grows uniformly on the hollow fiber membrane, and after high-temperature heat treatment, the nano-titanium dioxide / Polyimide composite hollow membrane; the temperature of high temperature heat treatment is 270°C, and th...

Embodiment 2

[0038] (1) Dissolve polyimide in N,N-dimethylacetamide, add polyvinylpyrrolidone and tetrabutyl titanate, stir at high speed for 120 minutes, then add complexing agent, continue stirring for 10 minutes, and make spinning liquid; the rotating speed of high-speed stirring is 1000r / min; the complexing agent is sodium citrate; the parts by weight of each raw material are 28 parts by weight of polyimide, 68 parts by weight of N,N-dimethylacetamide, polyvinylpyrrolidone 1 part by weight, 2 parts by weight of tetrabutyl titanate, 1 part by weight of complexing agent;

[0039] (2) Add the spinning solution in step (1) into the electrospinning machine, and obtain the hollow fiber membrane by spinning, and at the same time, the nano-titanium dioxide generated in situ grows uniformly on the hollow fiber membrane, and after high-temperature heat treatment, the nano-titanium dioxide / Polyimide composite hollow membrane; the temperature of high temperature heat treatment is 250°C, and the t...

Embodiment 3

[0043] (1) Dissolve polyimide in N,N-dimethylacetamide, add polyvinylpyrrolidone and tetrabutyl titanate, stir at high speed for 180 minutes, then add complexing agent, continue stirring for 20 minutes, and make spinning liquid; the rotating speed of high-speed stirring is 800r / min; the complexing agent is sodium tartrate; the weight parts of each raw material are, polyimide 33 weight parts, N,N-dimethylacetamide 58 weight parts, polyvinylpyrrolidone 3 Parts by weight, 4 parts by weight of tetrabutyl titanate, 2 parts by weight of complexing agent;

[0044] (2) Add the spinning solution in step (1) into the electrospinning machine, and obtain the hollow fiber membrane by spinning, and at the same time, the nano-titanium dioxide generated in situ grows uniformly on the hollow fiber membrane, and after high-temperature heat treatment, the nano-titanium dioxide / Polyimide composite hollow membrane; the temperature of high temperature heat treatment is 300°C, and the time is 30min...

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Abstract

The invention belongs to the technical field of sewage treatment, and provides a recyclable high-temperature-resistant photocatalytic film for sewage treatment and a preparation method thereof. The method comprises the following steps: adding polyimide, polyvinylpyrrolidone, tetrabutyl titanate and a complexing agent to N,N-dimethylacetamide to form a spinning solution, and carrying out electrospinning to obtain a composite hollow film with deposited nanometer titanium dioxide, then reacting with an ethanol solution of soluble cobalt salt and soluble cerium salt, and finally, carrying out low-temperature heat treatment and high temperature calcination to obtain the nanometer titanium dioxide-cobalt oxide-cerium oxide / polyimide composite hollow film. Compared with that prepared by conventional methods, the composite catalyst film provided by the invention has the advantages of supporting a photocatalyst firmly and uniformly, and having high catalytic activity, strong ability of catalytic degradation of pollutants and good high temperature resistance, can be used for purification treatment of high temperature sewage, is easy to recycle, has good environmental friendliness and is suitable for large-scale promotion and application.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment and provides a recyclable high-temperature resistant photocatalytic film for sewage treatment and a preparation method. Background technique [0002] With the development of industrialization in the world, water pollution is becoming more and more serious, and the pollutants in water are also showing a trend of diversification. Common pollutants include toxic heavy metals, natural toxins, drugs, organic pollutants, etc. Common purification technologies include chlorine gas, ozone and ultraviolet disinfection, filtration, adsorption, standing, etc., but these methods are often not very effective for new pollutants and may cause secondary pollution. In recent years, due to the pollution-free and safe characteristics of photocatalytic technology, the use of photocatalytic technology to treat and degrade pollutants has become a research hotspot in the field of environment. [0003] In the tr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/38B01J35/06B01J37/34C02F1/30C02F101/34C02F101/38
CPCC02F1/30B01J23/002B01J31/38B01J37/349C02F2305/10C02F2101/308C02F2101/38C02F2101/40C02F2101/34B01J2523/00B01J35/399B01J35/23B01J35/59B01J35/39B01J2523/3712B01J2523/47B01J2523/845
Inventor 李丹蔡宗英赵宏强
Owner 成都市水泷头化工科技有限公司
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