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Heteropoly acid catalyst with visible light photocatalysis active and preparation and application thereof

A technology of photocatalytic activity and heteropolyacid, which is applied in the direction of organic compound/hydride/coordination complex catalyst, physical/chemical process catalyst, chemical instrument and method, etc., to achieve the effect of improving photocatalytic efficiency and high degradation effect

Inactive Publication Date: 2008-07-02
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of dichloride tris 2,2'-bipyridyl ruthenium sensitized heteropolyacid as a photocatalytic material for the degradation of organic dyes has not been reported

Method used

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  • Heteropoly acid catalyst with visible light photocatalysis active and preparation and application thereof
  • Heteropoly acid catalyst with visible light photocatalysis active and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Embodiment 1: the preparation of R-PMo organic-inorganic hybrid material

[0012] Slowly add the aqueous solution dissolved with phosphomolybdic acid to the aqueous solution potassium dissolved with tri-2,2'-bipyridylruthenium dichloride, so that the ratio of the two substances is two to three, and then the mixed solution is mixed at 80 The reaction was carried out for 1 h under high temperature, and a reddish-brown precipitate was obtained. After filtering, the precipitate was washed three times with distilled water, ethanol, and ether, respectively, and dried to obtain a phosphomolybdic acid hybrid material sensitized by ruthenium dichloride 3,2,2-bipyridine.

[0013] The ultraviolet-visible spectrum of the R-PMo hybrid material was characterized by a Lambda-900 ultraviolet-visible-near-infrared spectrophotometer produced by PerkinElmer, USA. Its diffuse reflectance spectrum shows that the strongest absorption peak of the prepared R-PMo hybrid material is at 560nm. C...

Embodiment 2

[0016] Embodiment 2: Visible light photocatalytic activity test of R-PMo organic-inorganic material

[0017] Photocatalysis experiment: through a 300W high-pressure mercury lamp (using 1mol / L NaNO 2 The solution filters out light with a wavelength below 400nm) and irradiates the R-PMo organic-inorganic hybrid material to degrade organic dyes such as methyl orange, methyl blue, rose bengal, and Congo red in the aqueous solution. The specific process is as follows: the R-PMo hybrid material is dispersed into the organic dye solution, and the organic dye solution is irradiated under the stirring condition, and the wavelength range of the light source is 400-700nm.

[0018] Evaluation of photocatalytic activity: Weigh 0.05g of R-PMo hybrid material, disperse into 20ml of 20mg / L methyl orange, methyl blue, rose red, Congo red solution, irradiate under visible light for a certain period of time, and then centrifuge Separation, take the supernatant and measure the change of the abso...

Embodiment 3

[0022] Example 3: R-PMo organic-inorganic hybrid material visible light photocatalytic degradation of methyl orange solution

[0023] Refer to Example 2 for the test steps.

[0024] Degradation results: The degradation rate of methyl orange can reach 79.00% after 30 minutes of light, and the degradation rate increases linearly with the increase of light time.

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Abstract

The invention relates to a heteropolyacid catalyst with visible light photocatalytic activity and a preparation method and uses thereof, which relates to the preparation method of chloride 2, 2'- a ruthenium bipyridine sensitization heteropolyacid, characterization and photocatalytic activity evaluation. The hybridized material is prepared by heteropolyacid H3PMo12O40 and the chloride 2, 2'- a ruthenium bipyridine through a chemical coprecipitaion method. The material is used for degrading methyl orange, methyl blue, rose bengal or the Congo red or the organic dyes which has the same chromophore as the aforementioned dyes. The hybridized material not only preserves the photocatalytic activity of heteropolyacid degraded organic materials, but also overcomes the shortcomings of polyacid of being easily dissoluble in polar solvents and difficult in processing organic dye waste water and difficult in recycling; the invention also overcomes the shortcoming that the hetaropolyacid can only reveal photocatalytic capacity under ultraviolet radiation generally; therefore, the invention has higher photocatalytic activity even in visible light region.

Description

technical field [0001] The present invention relates to a kind of photocatalyst that is made of three 2,2'-dipyridyl ruthenium sensitized heteropolyacids of dichloride, more particularly relates to a kind of photocatalyst that also has high catalytic activity even in the range of visible light. Background technique [0002] With the development of industry, the limited water resources of human beings are increasingly polluted, and the removal of toxic and harmful chemicals such as pesticides and organic dyes in water has become an important task in the field of environmental protection. However, most of the current water pollution treatment methods are aimed at pollutants with large discharge volume and high concentration, and they are powerless to purify the priority pollutants in water bodies with low concentration and difficult to transform. However, the photocatalytic degradation technology developed in the 1980s provides a good way to solve this problem. But in the pas...

Claims

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Application Information

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IPC IPC(8): B01J27/19B01J31/22B01J31/30C02F1/30C02F1/72
Inventor 曹荣李涛海高水英
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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