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Preparation method of nanometer mesoporous SiO2/TiO2 photocatalytic composite material doped with metal ions

A technology of composite photocatalysis and metal ions, which is applied in the field of preparation of nano-mesoporous SiO2-TiO2 composite photocatalytic materials, can solve the problems that silicon oxide and titanium oxide cannot be effectively composited, the steps are complicated, and the liquid phase directly synthesizes the composite structure. Difficulty and other problems , to achieve relatively low cost, improve safety and reduce pollution

Inactive Publication Date: 2016-05-11
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 nanometer mesoporous SiO2/TiO2 photocatalytic composite material doped with metal ions
  • Preparation method of nanometer mesoporous SiO2/TiO2 photocatalytic composite material doped with metal ions
  • Preparation method of nanometer mesoporous SiO2/TiO2 photocatalytic composite material doped with metal ions

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] First dissolve 100g of titanyl sulfate and 0.5g of ammonium molybdate with 500ml of deionized water to obtain a mixed aqueous solution of titanyl sulfate and ammonium molybdate; titrate the mixed aqueous solution with 36% ammonia water to a pH of 9 to obtain a precipitate, and use Deionized water was washed three times to obtain a mixture of molybdenum hydroxide and orthotitanic acid. Dissolve 5 g of the molybdenum hydroxide and orthotitanic acid mixture obtained by dissolving 5 g of the obtained mixture of molybdenum hydroxide and orthotitanic acid with a concentration of 30% hydrogen peroxide in 5 ml, so as to obtain an aqueous solution of titanium peroxide doped with metal molybdenum, and then use a 2.5% concentration of hydrogen peroxide. The pH of the aqueous solution of titanium peroxide doped with metal molybdenum was adjusted to about 10 by ammonia water; at a temperature of 80° C., 5 ml of tetrahexyloxysilane with a concentration of 28% by mass was added, and th...

Embodiment 2

[0040] Dissolve 100g of titanyl sulfate and 0.5g of ammonium molybdate with 500ml of deionized water to obtain a mixed aqueous solution of titanyl sulfate and ammonium molybdate; the mixed aqueous solution obtained by titration with ammonia water with a mass concentration of 36% is to pH 9 to obtain a precipitate, It was washed three times with deionized water to obtain a mixture of molybdenum hydroxide and orthotitanic acid. Dissolve 10 g of the molybdenum hydroxide and orthotitanic acid mixture obtained by dissolving 10 ml of an aqueous hydrogen peroxide solution with a concentration of 30% by mass to obtain an aqueous solution of titanium peroxide doped with metal molybdenum, using ammonia with a concentration of 2.5% by mass. The pH of the above-mentioned molybdenum-doped titanium peroxide aqueous solution is adjusted to be about 5; at a temperature of 50 ° C, 5 ml of tetrabutoxysilane with a mass percentage concentration of 28% is added, and the reaction is mechanically st...

Embodiment 3

[0042] Dissolve 100g of titanyl sulfate and 0.5g of ammonium molybdate with 500ml of deionized water to obtain a mixed aqueous solution of titanyl sulfate and ammonium molybdate; titrate the mixed aqueous solution with 36% ammonia water to a pH of 9 to obtain a precipitate, and use the Ionized water was washed three times to obtain a mixture of molybdenum hydroxide and orthotitanic acid. Dissolve 5 g of the molybdenum hydroxide and orthotitanic acid mixture obtained by dissolving 5 g of the obtained molybdenum hydroxide and orthotitanic acid mixture with 5 ml of an aqueous hydrogen peroxide solution with a concentration of 30% by mass, thereby obtaining an aqueous solution of titanium peroxide doped with metal molybdenum, using ammonia water with a concentration of 2.5% by mass Adjust the pH of the above-mentioned molybdenum-doped titanium peroxide aqueous solution to be about 7; at a temperature of 100 ° C, add 5 ml of tetrahexyloxysilane with a mass percentage concentration o...

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Abstract

The invention relates to a preparation method of a nanometer mesoporous SiO2 / TiO2 photocatalytic composite material doped with metal ions. The method is simple in procedure, high in operability, low in cost and suitable for batched preparation and has industrial production probability and wide application prospects. In addition, the method has another important advantage that due to the fact that the whole reaction system only uses water as solvent without using other organic solvent such as alcohol, the pollution to the environment is effectively reduced and the safety of production links is improved.

Description

technical field [0001] The invention belongs to the field of preparation of inorganic metal oxides, in particular to nanometer mesoporous SiO doped with metal ions 2 -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 coatings, photoelectric conversion, catalysis, functional ceramics, antibacterial materials and many other fields. 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 photocatalyst is an emerging environmental protection technology that effectively removes chemical pollutants, which can accelerate the degradation process of nitrogen oxides and sulfides. That is, the holes generated by the solid semiconductor photocatalytic material excited by light are used to capture NO. x The elect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/28B01J35/10C09D7/12
CPCC09D7/61B01J23/28B01J35/23B01J35/60B01J35/39
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