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Preparation method of high-activity nanometer CaCO3-TiO2 composite photocatalytic material

A composite photocatalytic and high-activity technology, which is applied in the direction of catalyst activation/preparation, chemical instruments and methods, nanotechnology, etc., can solve the problem that silicon oxide and titanium oxide cannot be effectively composited, liquid phase direct synthesis of composite structures is difficult, and the steps are complicated, etc. problems, to achieve relatively low cost, reduce pollution, and improve safety

Inactive Publication Date: 2016-04-20
北京富莱士博科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the synthesis method of related materials generally adopts the process of synthesizing silicon oxide and titanium oxide materials separately and then compounding them. The steps are complicated, and there is a problem that the subsequent silicon oxide and titanium oxide cannot be effectively compounded.
The main reason is that the crystallization of titanium oxide usually requires high-temperature sintering, while silicon oxide can generally be directly hydrolyzed in the liquid phase. Therefore, it is difficult to directly synthesize the composite structure in the liquid phase.

Method used

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  • Preparation method of high-activity nanometer CaCO3-TiO2 composite photocatalytic material
  • Preparation method of high-activity nanometer CaCO3-TiO2 composite photocatalytic material
  • Preparation method of high-activity nanometer CaCO3-TiO2 composite photocatalytic material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] First dissolve 100g of titanyl sulfate and 20g of calcium nitrate with 500ml of deionized water to obtain a mixed aqueous solution of titanyl sulfate and calcium nitrate; the mixed aqueous solution is titrated to a pH of 9 with a mass concentration of 36% ammonia water to obtain a precipitate, and deionized water After washing 3 times, a mixture of calcium hydroxide and orthotitanic acid was obtained. Dissolve 5 g of the obtained mixture of calcium hydroxide and orthotitanic acid with 5 ml of 30% aqueous hydrogen peroxide solution to obtain an aqueous solution of titanium peroxide containing calcium hydroxide; at a temperature of 100° C., add 1 g of carbonic acid Sodium, mechanically stirred and refluxed for 4 hours, after the reaction was completed, the product was filtered, washed, dried, etc. to obtain highly active nano-CaCO 3 -TiO 2 Composite photocatalytic materials.

Embodiment 2

[0041] Except adding 5g calcium nitrate as calcium ion source, prepare CaCO in the same manner as in Example 1 3 -TiO 2 Composite photocatalytic materials.

Embodiment 3

[0043] Except adding 10g calcium nitrate as calcium ion source, prepare CaCO in the same manner as in Example 1 3 -TiO 2 Composite photocatalytic materials.

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Abstract

The invention relates to a preparation method of a high-activity nanometer CaCO3-TiO2 composite photocatalytic material. The method is simple in process, high in operability, relatively low in cost and applicable to batch preparation and has the possibility of industrial production and wide application prospect. In addition, the preparation method has the another important advantage that the whole reaction system only adopts water as a solvent, no organic solvent such as alcohol is adopted, so that pollution to the environment is effectively reduced, and the production process safety is improved.

Description

technical field [0001] The invention belongs to the field of preparation of inorganic metal oxides, in particular to highly active nano-CaCO 3 -TiO 2 Preparation method of composite photocatalytic material. Background technique [0002] Nano-TiO 2 As a functional inorganic material, it has broad application prospects in many fields such as coatings, photoelectric conversion, catalysis, functional ceramics, and antibacterial materials. Its synthesis and application research has always been the focus of research in the field of related functional materials. Among them, semiconductor photocatalysis technology using nano-titanium oxide as a photocatalyst is an emerging environmental protection technology that can effectively remove chemical pollutants, and it can accelerate the degradation process of nitrogen oxides and sulfides. That is, the holes generated by the photoexcitation of solid semiconductor photocatalytic materials are used to capture NO x The electrons in the s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/04B01J35/02B01J37/03B82Y30/00B82Y40/00C09D7/12B01J35/00
CPCC09D7/61B82Y30/00B82Y40/00B01J21/063B01J23/04B01J37/031B01J35/50B01J35/39
Inventor 程明明张彩霞黄晓静杜立宁
Owner 北京富莱士博科技发展有限公司