Method for preparing flyash-supporting nanometer titanic oxide composite photochemical catalyst material

A technology of nano-titanium dioxide and composite materials, applied in the field of preparation of fly ash-loaded nano-titanium dioxide composite materials, to achieve the effect of easy source, good synergy, and solution to storage and processing problems

Inactive Publication Date: 2009-11-25
SOUTH CHINA AGRI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the method of preparing fly ash-loaded titanium dioxide photocatalytic

Method used

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Examples

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Effect test

Embodiment 1

[0014] First dissolve diethylamine in deionized water to form a homogeneous solution, then add tetramethylammonium hydroxide, and obtain a homogeneous stable solution A under stirring; deionized water is 50ml, diethylamine and tetramethylammonium hydroxide The mass concentrations of deionized water are 3% and 0.5%, respectively.

[0015] Mix titanyl sulfate powder with deionized water and stir to form a white slurry liquid, deionized water is 100ml, TiO 2 The mass content of deionized water is 10%. Then add 10g of fly ash powder to make the fly ash fully contact with the slurry liquid to obtain the mixture B.

[0016] Then A and B were mixed, aged for 8h, and then washed, vacuum-dried and heat-treated at 500°C to obtain a fly ash-loaded nano-titanium dioxide composite. The composite material was subjected to a photocatalytic degradation experiment according to the above method, and it was found that the degradation rate of butachlor could reach 95%.

Embodiment 2

[0018] First dissolve diethylamine in deionized water to form a homogeneous solution, then add tetramethylammonium hydroxide, and obtain a homogeneous stable solution A under stirring; deionized water is 50ml, diethylamine and tetramethylammonium hydroxide The mass concentrations of deionized water are 2.2% and 0.75%, respectively.

[0019] Mix titanyl sulfate powder with deionized water and stir to form a white slurry liquid, deionized water is 100ml, TiO 2 The mass content of deionized water is 15%. Then add 15g of fly ash powder to make the fly ash fully contact with the slurry liquid to obtain the mixture B.

[0020] Then A and B were mixed, aged for 8h, and then washed, vacuum-dried and heat-treated at 500°C to obtain a fly ash-loaded nano-titanium dioxide composite. Its degradation rate of butachlor can reach 90%.

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Abstract

The present invention discloses a method for preparing flyash-supporting nanometer titanic oxide composite photochemical catalyst material, including the following steps: (1) dissolving a formwork in a deionized water to form a homogeneous phase solution, then adding the tetramethyl ammonium hydroxide to obtain a homogeneous phase stable solution A; (2) mixing and agitating the titanoxy sulfate and the deionized water to form a stock white shape liquid, then adding the flyash powder to obtain a mixture B; (3) mixing the solution A and the mixture B, and aging; (4) finally laundering, drying and heat treating to obtain the flyash-supporting nanometer titanic oxide composite material. The dimension of the flyash-supporting nanometer titanic oxide composite photochemical catalyst material is from 10-20nm, and the nanometer particle is supported on the flyash particle surface uniformly. It is not only capable of reusing the solid wastes flyash, also resolving the storage and handling problem of the wastes, moreover the flyash has a strong adsorption capacity, which improves a photochemical catalyst degradation capability of a photocatalyst to an organic compound greatly.

Description

technical field [0001] The invention belongs to the field of inorganic materials, and mainly relates to a preparation method of a fly ash-loaded nano titanium dioxide composite material. Background technique [0002] Fly ash is solid waste discharged from thermal power plants or boilers of large enterprises after burning coal powder. The country's annual fly ash emissions have reached 160 million tons. If a large amount of fly ash is not properly disposed of, it will not only occupy a large area of ​​farmland, but also produce poplar dust that will seriously pollute the atmosphere and cause great harm to human health. Nano TiO 2 Particles are loaded on the surface of fly ash, and the nano-TiO 2 The particles are fixed to reduce the loss rate of catalyst particles. The strong adsorption and large specific surface area of ​​fly ash can adsorb organic pollutants such as pesticides on its surface, and then degrade them into non-polluting small molecules through photocatalysi...

Claims

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Application Information

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IPC IPC(8): B01J21/06B01J37/00B09B3/00B09C1/08A62D3/17A62D101/20A62D101/04
Inventor 周武艺
Owner SOUTH CHINA AGRI UNIV
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