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Visible light nano compound catalyst and preparation and application thereof

A nanocomposite and catalyst technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve the problems of inability to utilize visible light energy, low processing efficiency, and waste of light energy and other problems, to achieve the effect of low price, simple preparation process and cost reduction

Active Publication Date: 2019-06-21
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, traditional photocatalysts (such as TiO 2 ) Due to the wide band gap, usually only about 5% of the ultraviolet band energy can be used in sunlight and visible light energy cannot be used, which causes a great waste of light energy and also leads to the treatment efficiency of traditional photocatalytic methods. Low

Method used

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  • Visible light nano compound catalyst and preparation and application thereof
  • Visible light nano compound catalyst and preparation and application thereof
  • Visible light nano compound catalyst and preparation and application thereof

Examples

Experimental program
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Embodiment 1

[0043] The visible light nanocomposite catalyst of the present embodiment is based on nanometer γ-phase alumina with a particle diameter of 20nm as a carrier, with WO 3 as the active ingredient.

[0044] The preparation steps of the visible light nanocomposite catalyst of this embodiment are as follows:

[0045] (1) Na 2 WO 4 2H 2 O is dispersed into a 66g / L solution with deionized water;

[0046] (2) With the solution prepared in step (1), according to Na 2 WO 4 2H 2 O: Nano γ phase alumina = 10:90 mass ratio, dropwise and uniformly added to nano γ phase alumina for impregnation, to obtain aqueous nano γ phase alumina loaded Na 2 WO 4 catalyst;

[0047] (3) Place the impregnated catalyst in step (2) in a drying box, and dry it at 60°C for 12 hours to obtain a dry nanometer γ-phase alumina loaded Na 2 WO 4 Nano catalyst;

[0048] (4) Place the dried catalyst in step (3) in a muffle furnace, and calcine it at 350°C for 6h to obtain nano-γ-phase alumina-supported WO ...

Embodiment 2

[0055] The difference between Example 2 and Example 1 is that in the preparation process of the visible light composite nanocatalyst, the calcination temperature in step (4) is 450° C., the components and their dosages and the rest of the preparation process are the same as in Example 1.

Embodiment 3

[0057] The difference between Example 3 and Example 1 is that in the preparation process of the visible light composite nanocatalyst, the calcination temperature in step (4) is 500° C., the components and their dosages and the rest of the preparation process are the same as in Example 1.

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Abstract

The invention discloses a visible light nano compound catalyst and preparation and an application thereof. The catalyst is composed of WO3 and nano gamma-phase aluminum oxide. The preparation method comprises the following step of loading the nano gamma-phase aluminum oxide as a carrier and tungstate as an active component to the nano gamma-phase aluminum oxide carrier by the steps of impregnation, drying, calcining and the like. The catalyst can remove organic pollutants in regenerated drinking water by catalytic oxidization under the action of a visible light source, the power of which is 300-500 W, without inputting an external oxidizing agent. The dosage of the catalyst is 0.3-1.0 g / L. The treatment method is economical, clean and energy-saving, the organic pollutants are treated quickly and degraded thoroughly, and meanwhile, the preparation process of the catalyst is simple and low in cost. The regenerated water containing the organic pollutants can be treated effectively, so that the active demand on high quality regenerated drinking water in China and some water-deficient areas in the world is met better.

Description

technical field [0001] The invention relates to the field of advanced treatment of drinking water, and relates to a visible light nanocomposite catalyst and its preparation and application. In particular, it relates to a method for removing organic pollutants in regenerated drinking water with a visible light nanocomposite catalyst. Background technique [0002] Water resources in extremely arid regions are seriously scarce, and there is an urgent need for the development of new technologies for the treatment of recycled drinking water. Traditional reclaimed water advanced treatment technology can effectively remove pollutants harmful to human body that are easy to be degraded by microorganisms, inorganic pollutants and some trace pollutants in domestic sewage. In recent years, it has been widely used in microfiltration technology and reverse osmosis technology, which can further effectively It can effectively remove bacteria, colloids and even salt in water. However, even...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/30C02F1/30C02F1/72C02F101/34C02F101/38
Inventor 刘书明徐熙焱吴雪
Owner TSINGHUA UNIV