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Diatomite composite photocatalyst for indoor air purification and preparation method

A technology for purifying air and diatomite, applied in catalyst activation/preparation, physical/chemical process catalysts, molecular sieve catalysts, etc., can solve the problem of poor catalyst stability, poor photocatalytic material dispersibility, and visible light utilization. The limited degradation ability of organic pollutants and other problems to achieve the effect of improving adsorption efficiency, maintaining porous structure and improving stability

Inactive Publication Date: 2018-11-02
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] According to the above, the technology of compounding diatomite and photocatalytic materials in the existing scheme has poor dispersion of photocatalytic materials, and the composite photocatalyst containing diatomite is still limited in the utilization rate of visible light and the degradation ability of organic pollutants, and The stability of the catalyst is relatively poor. The present invention proposes a diatomite composite photocatalyst and preparation method for indoor air purification, which can effectively solve the above technical problems

Method used

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  • Diatomite composite photocatalyst for indoor air purification and preparation method

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Embodiment 1

[0030] (1) Add o-methylaniline and zeolite molecular sieve to the organic solvent to make an oil phase, and then add TiO 2 The colloid is uniformly mixed with the oil phase to obtain a mixed oil phase; the organic solvent is triethanolamine;

[0031] In the mixed oil phase, in parts by weight, including: 17 parts of o-methylaniline, 3 parts of zeolite molecular sieves, 57 parts of organic solvents, TiO 2 Colloid 23 parts; TiO 2 The colloid is a dilute acid dispersion colloid with a solid content of 15%.

[0032] (2) Add the initiator and phytic acid into water to prepare the water phase; the initiator is azobisisobutylamidine hydrochloride;

[0033] In the water phase, by weight, wherein: 4 parts of initiator, 36 parts of phytic acid, 60 parts of water;

[0034] (3) First place the diatomite in the fluidization equipment, and at the same time atomize and deposit the mixed oil phase obtained in step (1) and the water phase obtained in step (2) on the surface and inner pores ...

Embodiment 2

[0039] (1) Add o-methylaniline and zeolite molecular sieve to the organic solvent to make an oil phase, and then add TiO 2 The colloid and the oil phase are uniformly mixed to obtain a mixed oil phase; the organic solvent is styrene;

[0040] In the mixed oil phase, in parts by weight, including: 15 parts of o-methylaniline, 2 parts of zeolite molecular sieves, 63 parts of organic solvents, TiO 2 Colloid 20 parts; TiO 2 The colloid is a dilute acid dispersion colloid with a solid content of 15%.

[0041] (2) Add the initiator and phytic acid into water to prepare the water phase; the initiator is hydrogen peroxide;

[0042] In the water phase, by weight, wherein: 3 parts of initiator, 30 parts of phytic acid, 67 parts of water;

[0043] (3) First place the diatomite in the fluidization equipment, and at the same time atomize and deposit the mixed oil phase obtained in step (1) and the water phase obtained in step (2) on the surface and inner pores of the diatomite, Interfa...

Embodiment 3

[0048] (1) Add o-methylaniline and zeolite molecular sieve to the organic solvent to make an oil phase, and then add TiO 2 The colloid is uniformly mixed with the oil phase to obtain a mixed oil phase; the organic solvent is trichloroethylene;

[0049] In the mixed oil phase, in parts by weight, including: 20 parts of o-methylaniline, 4 parts of zeolite molecular sieves, 51 parts of organic solvents, TiO 2 Colloid 25 parts; TiO 2 The colloid is a dilute acid dispersion colloid with a solid content of 15%

[0050] (2) Add the initiator and phytic acid into water to prepare the water phase; the initiator is ammonium persulfate;

[0051] In the water phase, by weight, wherein: 5 parts of initiator, 40 parts of phytic acid, 55 parts of water;

[0052] (3) First place the diatomite in the fluidization equipment, and at the same time atomize and deposit the mixed oil phase obtained in step (1) and the water phase obtained in step (2) on the surface and inner pores of the diatomit...

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Abstract

The invention relates to the field of photocatalyst preparation and discloses a diatomite composite photocatalyst for indoor air purification and a preparation method. The method comprises the preparation process as follows: (1) o-toluidine and a zeolite molecular sieve are added to an organic solvent, an oil phase is prepared and mixed with TiO2 colloid, and a mixed oil phase is obtained; (2) aninitiator and phytic acid are added to water and a water phase is prepared; (3) 40-60 parts of diatomite, 20-30 parts of the mixed oil phase and 20-30 parts of the water phase are mixed in parts by weight; (4) heating calcination is performed after heating drying under the high pressure condition. In the prepared composite photocatalyst, TiO2 is firmly supported on the surface and in pores of diatomite and cannot fall off easily, so that the stability of the catalyst is improved; meanwhile, the prepared composite photocatalyst has the characteristic of 3D distribution, uniform dispersion of TiO2 in diatomite particles is realized, the specific porous structure of diatomite is kept, and the adsorption and decomposition efficiency of harmful gases is greatly improved.

Description

technical field [0001] The invention relates to the field of photocatalyst preparation, and discloses a diatomite composite photocatalyst for purifying indoor air and a preparation method thereof. Background technique [0002] In recent years, with indoor closed decoration and indoor air pollution brought by decoration materials. Various harmful gases inevitably exist around the buildings where people work and live, mainly total volatile organic compounds (TVOCs) such as radon, ammonia, benzene, and formaldehyde. These harmful gases have different degrees of harm to the human body. The removal and degradation of these harmful pollutants has always been a matter of great concern. Facing serious indoor pollution and people's widespread concern, a new industry—air purification industry has developed to meet the needs of the market. [0003] At present, there are many kinds of indoor air purification materials on the market in our country, such as air purification coatings, fl...

Claims

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Application Information

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IPC IPC(8): B01J29/06B01J35/10B01J37/03B01J37/08B01D53/00B01D53/86B01D53/02B01J20/14
CPCB01D53/007B01D53/02B01D53/86B01J20/14B01J29/06B01J37/035B01J37/08B01D2258/06B01D2257/708B01D2257/704B01J2229/60B01J35/39B01J35/60
Inventor 陈庆昝航
Owner CHENDU NEW KELI CHEM SCI CO LTD