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A kind of photocatalytic haze reducing agent and preparation method thereof

A photocatalyst and photocatalytic technology, applied in chemical instruments and methods, separation methods, dispersed particle separation, etc., can solve the problems of poor practicability and poor haze particle trapping ability, and achieve the improvement and reduction of photocatalytic ability. Effect of surface tension, good photocatalytic ability

Inactive Publication Date: 2019-06-11
TIANJIN VOCATIONAL INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The purpose of the present invention is to provide a photocatalytic haze reducer, which is composed of electrostatic adsorbent, chemical sedimentation agent, photocatalyst, sol stabilizer, organic silicon coupling agent, organic solvent and water, and is activated by visible light. TiO 2 / Fe 2 o 3 / Al 2 o 3 / SiO 2 As the main component, the nano-oxide contained in one dose is multi-purpose, and its sol is directly sprayed in the air containing haze or coated on the surface of the structure, and the dust indoors and outdoors can be reduced by electrostatic adsorption, chemical precipitation and photocatalytic decomposition. Haze, overcoming the defects of the existing photocatalytic haze reduction products with poor ability to capture haze particles and poor practicability

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Dissolve 25.8g (0.1mol) of chemical reagent titanyl sulfate (0.1mol), 4.0g (0.01mol) of ferric sulfate, and 17.2g (0.05mol) of aluminum sulfate in deionized water to prepare a 2mol / L sulfate solution, and filter to remove insoluble substances, mixed to form a mixed sulfate solution. Under stirring, add 205 mL of ammonia water with a concentration of 2 mol / L to the mixed sulfate solution to co-precipitate titanium, iron and aluminum hydroxide, neutralize the solution to a pH value of 11, filter and separate the formed hydroxide precipitate, and use deionized Wash the hydroxide precipitate with water, and use barium chloride test solution to check that the washing water does not contain sulfate ions. Disperse the hydroxide precipitate in 56g (0.56mol) acetylacetone solvent, so that the hydroxide precipitate can be completely peptized, and heat and reflux at 130-140°C for 6h to form Fe-Al co-doped nano-TiO 2 Photocatalyst sol.

[0045] Dilute 37.2g (0.187mol) of commerci...

Embodiment 2

[0048] Dissolve 25.8g (0.1mol) of chemical reagent titanyl sulfate, 8.0g (0.02mol) of iron sulfate, and 8.6g (0.025mol) of aluminum sulfate in deionized water to prepare a 2mol / L sulfate solution, and filter to remove insoluble matter , mixed to form a mixed sulfate solution. Under stirring, add 235 mL of ammonia water with a concentration of 2 mol / L to the mixed sulfate solution to co-precipitate titanium, iron and aluminum hydroxide, neutralize the solution until the pH value is 10, filter and separate the formed hydroxide precipitate, and use deionized Wash the precipitated hydroxide with water, and use barium chloride test solution to check that there is no sulfate ion in the washing water. Disperse the hydroxide precipitate in 47g (0.47mol) acetylacetone solvent, so that the hydroxide precipitate can be completely peptized, and heat and reflux at 130-140°C for 10h to form Fe-Al co-doped nano-TiO 2 Photocatalyst sol.

[0049] Dilute 47.1g (0.235mol) of commercially avail...

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Abstract

The invention relates to a visible light-activated dust haze eliminating agent with doped nano-TiO2 / Fe2O3 / Al2O3 / SiO2 as a main component and a preparation method of the dust haze eliminating agent. The dust haze eliminating agent contains an electrostatic adsorbent, a chemical settling agent, a photocatalyst, a sol stabilizing agent, an organosilicone coupling agent and a solvent. The mass percentage concentration of solids in the product is 0.5%-5%, the effective solid component dose is 0.05g / m<3>-1.0g / m<3> when the dust haze eliminating agent is used for eliminating dust haze in air; and the dust haze eliminating agent can be directly sprayed to dust haze air and can be used for precoating the surfaces of ground buildings, and the dust haze eliminating rate within 2h is 60%-80% in a sunshine illumination test. According to the dust haze eliminating agent, the defect that an existing photocatalysis dust haze eliminating product is poor in dust haze particle capturing capacity is overcome, the product raw materials are cheap and easily available, and the preparation process is simple, convenient, low in cost and easy for industrial application and promotion.

Description

technical field [0001] The invention relates to a photocatalytic haze reducing agent and a preparation method thereof, in particular doped nano-TiO activated by visible light 2 / Fe 2 o 3 / Al 2 o 3 / SiO 2 The haze reducer as the main component and the preparation method thereof can be directly sprayed in the air containing the haze or coated on the surface of ground structures for indoor and outdoor haze reduction, and belong to the field of environmental protection and new materials. Background technique [0002] In recent years, there have been both inter-provincial, large-scale, strong seasonal, and short-duration hazes in China, as well as localized, small-scale, normalized, and long-duration hazes. Haze particles are enriched with many inorganic and organic compounds, which are adsorbed on very fine solid particles in the aerosol. The chemical components with high content in haze mainly include sulfate, nitrate, ammonium salt, organic carbon and elemental carbon. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D50/00B01D53/86
CPCB01D50/00B01D53/86B01D2255/802B01D2258/06
Inventor 李建生高洋韩秋坡尹浩南杜秋雨刘炳光
Owner TIANJIN VOCATIONAL INST
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