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Photocatalytic separation film for water treatment and preparation method

A photocatalytic separation membrane and water treatment technology, applied in the field of water treatment, can solve the problems of poor photocatalyst dispersibility, unsatisfactory water treatment effect, low photocatalytic efficiency, etc., and achieves high visible light utilization rate, good dispersion, and photocatalysis Efficient effect

Active Publication Date: 2019-01-04
ZHEJIANG ZHIYUAN ENVIRONMENTAL TECH CO LTD
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  • Abstract
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Problems solved by technology

[0007] To sum up, in the existing technology that couples photocatalysis and membrane separation, there are problems of poor dispersion of photocatalyst in the membrane and easy agglomeration, and the utilization rate of visible light. Therefore, it is of great significance to develop a photocatalytic separation membrane that improves the dispersion of photocatalysts and can efficiently utilize visible light.

Method used

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  • Photocatalytic separation film for water treatment and preparation method

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Embodiment 1

[0032] (1) Add p-tert-butylphenol and catalyst sodium hydroxide to diphenyl ether, then add sublimed sulfur, tetrabutyl titanate, ammonium carbonate, zinc sulfate, stir under nitrogen atmosphere, and gradually heat up to reflux reaction Cool to room temperature after 5.5h, then wash with sulfuric acid solution and ethanol solution successively, then purify with chloroform, and dry in vacuum to prepare loaded nano-TiO 2and nano-ZnO p-tert-butylthiocalix[4]arene; the heating rate is 1.2°C / min, and the reflux temperature is 230°C; the mass concentration of the sulfuric acid solution is 5%, and the mass concentration of the ethanol solution is 86%; The temperature of vacuum drying is 44° C., and the time is 7 hours; the parts by weight of each raw material are 29 parts by weight of p-tert-butylphenol, 4 parts by weight of sodium hydroxide, 11 parts by weight of sublimed sulfur, 3 parts by weight of tetrabutyl titanate, 1 weight part of ammonium carbonate, 2 weight parts of zinc su...

Embodiment 2

[0041] (1) Add p-tert-butylphenol and catalyst sodium hydroxide to diphenyl ether, then add sublimed sulfur, tetrabutyl titanate, ammonium carbonate, zinc sulfate, stir under nitrogen atmosphere, and gradually heat up to reflux reaction Cool to room temperature after 5h, then wash with sulfuric acid solution and ethanol solution successively, then purify with chloroform, and dry in vacuum to prepare loaded nano-TiO 2 and nano-ZnO p-tert-butylthiocalix[4]arene; the heating rate is 0.5°C / min, and the reflux temperature is 210°C; the mass concentration of the sulfuric acid solution is 4%, and the mass concentration of the ethanol solution is 82%; The temperature of vacuum drying is 42° C., and the time is 7 hours; the parts by weight of each raw material are 29 parts by weight of p-tert-butylphenol, 4 parts by weight of sodium hydroxide, 11 parts by weight of sublimed sulfur, 3 parts by weight of tetrabutyl titanate, 1 weight part of ammonium carbonate, 1 weight part of zinc sulf...

Embodiment 3

[0046] (1) Add p-tert-butylphenol and catalyst sodium hydroxide to diphenyl ether, then add sublimed sulfur, tetrabutyl titanate, ammonium carbonate, zinc sulfate, stir under nitrogen atmosphere, and gradually heat up to reflux reaction After 6h, it was cooled to room temperature, and then washed with sulfuric acid solution and ethanol solution in turn, then purified with chloroform, and dried in vacuum to obtain the loaded nano-TiO 2 and nano-ZnO p-tert-butylthiocalix[4]arene; the heating rate is 1.5°C / min, and the reflux temperature is 230°C; the mass concentration of the sulfuric acid solution is 5%, and the mass concentration of the ethanol solution is 88%; The temperature of vacuum drying is 48° C., and the time is 6 hours; the parts by weight of each raw material are 31 parts by weight of p-tert-butylphenol, 4 parts by weight of sodium hydroxide, 12 parts by weight of sublimed sulfur, 4 parts by weight of tetrabutyl titanate, 2 parts by weight of ammonium carbonate, 2 pa...

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Abstract

The invention belongs to the technical field of water treatment, and provides a photocatalytic separation film for water treatment and a preparation method. The method includes the steps that nano TiO2 and nano ZnO are generated in situ in the synthesis process of tertiary butyl thio[4]calixarene, then the nano TiO2 and the nano ZnO are compounded with graphene, a nano TiO2-nano ZnO-calixarene -graphene composite photocatalyst is prepared and further added into a polyether sulfone spinning solution, and the photocatalytic hollow fiber separation film is prepared through spinning. Compared witha traditional method, by means of the prepared photocatalytic separation film, the problem of film contamination in the film separation technology and the problem about nano powder recovery in the photocatalysis technology are solved at the same time, the utilization rate of visible light is high, the photocatalysis efficiency is high, and a catalyst can be evenly dispersed.

Description

technical field [0001] The invention belongs to the technical field of water treatment and provides a photocatalytic separation membrane for water treatment and a preparation method. Background technique [0002] Photocatalytic oxidation technology is a technology that couples materials with photocatalytic properties and ultraviolet light. It is a new type of water pollution control technology. It has the characteristics of high efficiency, energy saving, and wide application range. It can react with almost any organic matter and is often used to treat Refractory organic matter can be directly mineralized into small inorganic molecules, which has broad application prospects. Among various semiconductor photocatalysts, due to TiO 2 It has unique advantages such as high photocatalytic activity, strong stability and relatively low price, and thus has received extensive attention at home and abroad. However, fine TiO 2 The particles are not easy to be separated and recovered ...

Claims

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Application Information

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IPC IPC(8): B01J31/06B01J31/38B01J35/00B01J35/06C02F1/44C02F1/30B01D71/68B01D71/58B01D69/08B01D67/00
CPCB01D67/0002B01D69/08B01D71/58B01D71/68C02F1/30C02F1/44B01J31/066B01J31/38C02F2305/10B01J35/59B01J35/39
Inventor 赵宏伟
Owner ZHEJIANG ZHIYUAN ENVIRONMENTAL TECH CO LTD
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