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Multifunctional nano-composite sewage purification film and preparation method and application thereof

A sewage purification and nanocomposite technology, applied in chemical instruments and methods, energy wastewater treatment, water/sewage treatment, etc., can solve the problem of underutilization of light energy, and achieve the goals of avoiding loss, improving utilization rate, and improving efficiency Effect

Active Publication Date: 2016-08-17
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method improves the efficiency of steam generation, some light energy is still not fully utilized, so there is still room for improvement in light energy utilization

Method used

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  • Multifunctional nano-composite sewage purification film and preparation method and application thereof
  • Multifunctional nano-composite sewage purification film and preparation method and application thereof
  • Multifunctional nano-composite sewage purification film and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Preparation of photothermal evaporation film

[0035] According to the formulation requirements, HAuCl 4 The solution is added to boiling deionized water, stirred for 1 minute, and then trisodium citrate solution is added, and then stirred continuously for 20 minutes to obtain nano-gold particles with a particle diameter of 10-100 nm, and then the prepared gold solution is centrifugally concentrated. Use anodic aluminum oxide AAO as the base film, place it on a suction filtration device, pour 25ml of concentrated gold solution into it, and use an air pump to carry out vacuum filtration until it is drained.

[0036] (2) Preparation of catalytic degradation membrane

[0037] On the basis of the previous step, continue to pour 1ml of titanium dioxide solution (particle size is ~ 25nm), carry out decompression suction filtration, then dry naturally to get such figure 1 TiO shown 2 -Au-AAO system nano-multifunctional sewage purification film.

[0038] (3) Purify sewa...

Embodiment 2

[0043] A novel multifunctional nanocomposite sewage purification membrane and a preparation method thereof, the method comprising the following steps:

[0044] (1) Preparation of photothermal evaporation film: Anodic aluminum oxide AAO film with a certain porous nanostructure is used as a substrate, and a layer of nano-silver particles with photothermal conversion characteristics is deposited on the substrate template to prepare a photothermal evaporation film. Specifically: uniformly disperse spherical silver particles with a particle size of 1-50nm having photothermal conversion characteristics into water to obtain a solution with a weight concentration of 1%-30%, and deposit it on the AAO basement film by vacuum filtration A layer of silver particle thin film is obtained photothermal evaporation film.

[0045] (2) Preparation of catalytic degradation film: on the basis of the above-mentioned photothermal evaporation film, continue to deposit titanium dioxide particles with ...

Embodiment 3

[0048] The base film with a certain porous structure is a glass fiber filter membrane; the material with photothermal conversion characteristics is gold particles; the nano photocatalyst material with catalytic degradation performance is nano zinc oxide particles; photothermal evaporation The preparation of the film is made by the coating process: uniformly disperse the gold particles with light-to-heat conversion properties into water (weight concentration is 1%-30%), and form a light-heat on the surface of the glass fiber filter membrane through a controllable spin coating device. Evaporation film: on the basis of the above-mentioned photothermal evaporation film, spherical titanium dioxide particles with a particle size of 20nm having catalytic degradation properties are uniformly dispersed in water (weight concentration is 1%-30%), and continue to pass through a controllable spin coating device On the basis of the photothermal evaporation film, a layer of nanometer zinc oxi...

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Abstract

The invention relates to a multifunctional nano-composite sewage purification film and a preparation method and application thereof. The purification film comprises a substrate, a photo-thermal evaporation film and a catalytic degradation film, wherein the photo-thermal evaporation film is deposited on the substrate and has the photo-thermal conversion characteristic, and the catalytic degradation film is deposited on the photo-thermal evaporation film and has catalytic degradation performance. The substrate is a micro-nano film with a certain porous structure. The photo-thermal evaporation film is made from metal with the photo-thermal conversion characteristic or alloy of the metal or a micro-nano structure of non-metal inorganic matter. The catalytic degradation film is made from a nano photocatalyst material with the catalytic degradation performance. Compared with the prior art, the multifunctional nano-composite sewage purification film has photo-catalytic degradation and photo-thermal evaporation functions at the same time, diversified purification can be conducted on sewage, therefore, the overall conversion rate and utilization rate of sunlight are increased, and the sewage purification efficiency can be greatly improved.

Description

technical field [0001] The invention belongs to the technical field of preparation and application of water purification film materials, and in particular relates to a multifunctional nano-composite sewage purification film and its preparation method and application. Background technique [0002] With the rapid development of modern society and the rapid expansion of the global population, energy consumption is also greatly increasing, which in turn leads to increasingly serious environmental pollution problems, such as air pollution and water pollution. The result of excessive discharge of pollutants into nature is a severe shortage of drinking water around the world. It is predicted that by 2025, nearly two-thirds of the world's population will be in countries with water shortages. An effective way to solve the shortage of water resources is to purify the polluted water through processes such as purification or distillation, so that it can be reused. Since solar energy h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/12B01D69/02B01D67/00C02F1/30C02F1/72C02F1/14C02F1/04B01J21/06
CPCB01D67/0079B01D69/02B01D69/12C02F1/04C02F1/14C02F1/30C02F1/725B01J21/063B01D2325/10B01J35/39Y02W10/37Y02A20/212
Inventor 邓涛尚文陶鹏刘洋娄金伟宋成轶邬剑波
Owner SHANGHAI JIAO TONG UNIV
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