Nanometer photocatalyst material supported embedded composite film and preparation method and application thereof

A catalytic material and nano-catalyst technology, applied in the field of membrane technology and water treatment, can solve the problems of no nano-photocatalytic material embedded composite membrane, no preparation method and application, etc., to improve hydrophilicity and reduce adsorption. and deposition, improving the effect of membrane flux

Active Publication Date: 2014-10-08
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in these new methods, there are no reports of embedded composite membranes supported by nano-photocatalytic materials, let alone their preparation methods and applications.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] This embodiment provides a kind of nano TiO 2 A method for preparing an embedded composite membrane supported by a photocatalytic material, comprising the following steps:

[0023] (1) Weigh 12wt.%, 2wt.% and 1.5wt.% PVDF, PEG and nano-TiO respectively 2 Dissolve the particles in N,N-dimethylacetamide solvent, mechanically stir for 24 hours in a constant temperature water bath at 40°C until they are completely dissolved and dispersed; then stand in a water bath at 40°C for 24 hours to fully defoam;

[0024] (2) Nano-TiO 2 The photocatalyst is ultrasonically dispersed in ethanol to obtain a dispersion liquid, and the dispersion liquid is spread on a scraper to make a paving liquid. TiO2 in the paving liquid 2 Concentration 7.5g / m 2 , and treated in a drying oven at 50°C for 5 minutes to completely evaporate the solvent, so as to obtain a flat film;

[0025] (3) Cover the casting solution obtained in step (1) on the flat film obtained in step (2), scrape out a liquid ...

Embodiment 2

[0029] This embodiment provides a kind of nano TiO 2 A method for preparing an embedded composite membrane supported by a photocatalytic material, comprising the following steps:

[0030] (1) Weigh 12wt.%, 2wt.% and 1.5wt.% PVDF, PEG and nano-TiO respectively 2 Dissolve the particles in N,N-dimethylacetamide solvent, mechanically stir for 36 hours in a constant temperature water bath at 80°C until they are completely dissolved and dispersed; then stand in a water bath at 80°C for 36 hours to fully defoam;

[0031] (2) Nano-TiO 2 The photocatalyst is ultrasonically dispersed in ethanol to obtain a dispersion liquid, and the dispersion liquid is spread on a scraper to make a paving liquid. TiO2 in the paving liquid 2 Concentration 30g / m 2 , and treated in a drying oven at 50°C for 10 minutes to completely evaporate the solvent, thereby obtaining a flat film;

[0032](3) Cover the film casting solution obtained in step (1) on the flat film obtained in step (2), scrape off a l...

Embodiment 3

[0036] This embodiment provides a kind of nano TiO 2 A method for preparing an embedded composite membrane supported by a photocatalytic material, comprising the following steps:

[0037] (1) Weigh 12wt.%, 2wt.% and 1.5wt.% PVDF, PEG and nano-TiO respectively 2 Dissolve the particles in N, N-dimethylacetamide solvent, mechanically stir for 48 hours in a constant temperature water bath at 40°C until they are completely dissolved and dispersed; then stand in a water bath at 40°C for 48 hours to fully defoam;

[0038] (2) Nano-TiO 2 The photocatalyst is ultrasonically dispersed in ethanol solvent to obtain a dispersion liquid, and the dispersion liquid is spread on the scraping film to make a paving liquid, and the TiO2 in the paving liquid 2 Concentration 7.5g / m 2 , and treated in a drying oven at 50°C for 5 minutes to completely evaporate the solvent, so as to obtain a flat film;

[0039] (3) Cover the casting solution obtained in step (1) on the flat film obtained in step ...

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Abstract

The invention discloses a method for preparing a nanometer photocatalyst material supported embedded composite film. The method comprises the following steps: dissolving an organic polymer base film material, a pore-forming agent and a nanometer catalyst in a solvent, stirring and standing to prepare a casting film solution; dispersing the nanometer photocatalyst in the solvent to obtain dispersion liquid, spreading the dispersion liquid on a plate to prepare a spreading solution, and drying the spreading solution to obtain a spreading film; and covering the spreading film with the casting film solution, scraping a liquid film by utilizing a film scraper, immersing the scraped liquid film in a constant temperature gel bath, and curing the liquid film to prepare the nanometer photocatalyst material supported embedded composite film. The invention also provides the nanometer photocatalyst material supported embedded composite film and application thereof. According to the method, a nanometer photocatalyst coating is uniformly, effectively, stably and firmly supported on the surface of the embedded composite film. Moreover, according to the composite film, the removal rate of pollutants is effectively improved, and film pollution is reduced.

Description

technical field [0001] The invention relates to the fields of membrane technology and water treatment, in particular to an embedded composite membrane supported by a nanometer photocatalyst material and a preparation method and application thereof. Background technique [0002] Membrane technology is considered to be one of the most promising high technologies in the 21st century, and it is the core technology to solve the shortage of water resources and the increasingly serious water pollution. Membrane technology has been widely favored in the water treatment industry in recent years because of its outstanding advantages such as high separation efficiency, simple process, low energy consumption, no need for additional chemicals, reliable operation, compact equipment, high product water quality, and easy integration with other technologies. application. However, during the application of membrane technology, membrane fouling will lead to a decrease in membrane flux and a s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/12B01D67/00C02F1/44C02F1/30
Inventor 邵嘉慧汉森·尤纳斯凌雨涵何义亮
Owner SHANGHAI JIAO TONG UNIV
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