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Microballoon-type titanium dioxide photocatalyst and preparation method thereof

A titanium dioxide and photocatalyst technology, applied in the directions of titanium dioxide, titanium oxide/hydroxide, physical/chemical process catalyst, etc., can solve the problems of limited application scope of titanium dioxide, low photon efficiency, low solar energy utilization rate, etc., and achieve uniform particle distribution. , The effect of stable product properties and high application value

Inactive Publication Date: 2014-03-26
SHANGHAI NAT ENG RES CENT FORNANOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, titanium dioxide has a wide band gap (3.23 electron volts), and can only be excited by short-wavelength ultraviolet light (λ<387.5 nanometers), while the relative content of ultraviolet light in natural light is relatively small, accounting for only 3% to 5 %, so the utilization rate of solar energy is very low; and due to the recombination of electrons and holes generated by photoexcitation, the light quantum efficiency is very low, which greatly limits the application range of titanium dioxide

Method used

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  • Microballoon-type titanium dioxide photocatalyst and preparation method thereof
  • Microballoon-type titanium dioxide photocatalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The microspherical nano-titanium dioxide photocatalyst was prepared by the urea method, and the specific steps were as follows:

[0028] (1) Weigh 3ml of tetrabutyl titanate and add it to 20ml of absolute ethanol, stir to mix evenly;

[0029] (2) Slowly titrate the above solution into 100ml of deionized water, stir well to make it hydrolyzed;

[0030] (3) The hydrolyzate is washed with absolute ethanol and transferred to the lining of a polytetrafluoroethylene hydrothermal kettle;

[0031] (4) Add absolute ethanol to about 70% of the total amount of the hydrothermal kettle, then add 2g of urea, stir evenly, put it in an oven for 36 hours at 110°C for hydrothermal reaction;

[0032] (5) The obtained product was washed with water and absolute ethanol, and then dried in a constant temperature drying oven at 60°C for 8 hours;

[0033] (6) Grind and dry the product, and calcinate it in a muffle furnace at 350° C. for 2 hours to obtain a microspherical titanium dioxide phot...

Embodiment 2

[0036] The microspherical nano-titanium dioxide photocatalyst was prepared by the urea method, and the specific steps were as follows:

[0037] (1) Weigh 5ml of tetrabutyl titanate and add it to 30ml of absolute ethanol, stir to mix evenly;

[0038] (2) Slowly titrate the above solution into 150ml of deionized water, stir well to make it hydrolyzed;

[0039] (3) The hydrolyzate is washed with absolute ethanol and transferred to the lining of a polytetrafluoroethylene hydrothermal kettle;

[0040] (4) Add absolute ethanol to about 70% of the total amount of the hydrothermal kettle, then add 5g of urea, stir evenly, put it in an oven for 48 hours at 150°C for hydrothermal reaction;

[0041] (5) The obtained product was washed with water and absolute ethanol, and then dried in a constant temperature drying oven at 80°C for 6 hours;

[0042] (6) Grind and dry the product, and calcinate it in a muffle furnace at 300° C. for 4 hours to obtain a microspherical titanium dioxide phot...

Embodiment 3

[0045] The microspherical nano-titanium dioxide photocatalyst was prepared by the urea method, and the specific steps were as follows:

[0046] (1) Weigh 5ml of tetrabutyl titanate and add it to 40ml of absolute ethanol, stir to mix evenly;

[0047] (2) Slowly titrate the above solution into 200ml of deionized water, stir well to make it hydrolyzed;

[0048] (3) The hydrolyzate is washed with absolute ethanol and transferred to the lining of a polytetrafluoroethylene hydrothermal kettle;

[0049] (4) Add absolute ethanol to about 70% of the total amount of the hydrothermal kettle, then add 3g of urea, stir evenly, put it in an oven for 24 hours at 130°C for hydrothermal reaction;

[0050] (5) The obtained product was washed with water and absolute ethanol, and then dried in a constant temperature drying oven at 60°C for 8 hours;

[0051] (6) Grind and dry the product, and calcinate it in a muffle furnace at 600°C for 2 hours to obtain a microspherical titanium dioxide photoc...

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Abstract

The invention discloses a preparation method of a microballoon-type titanium dioxide photocatalyst. The method includes dissolving tetrabutyl titanate into absolute ethanol, uniformly mixing, titrating into deionized water, stirring to fully hydrolyze the tetrabutyl titanate, cleaning with the absolute ethanol, transferring to an autoclave, adding a proper amount of urea, stirring uniformly, putting into a drying oven to perform a hydrothermal reaction, cleaning the reaction product with water and the absolute ethanol, putting into a thermostatic drying box, drying, and grinding into powder to obtain the microballoon-type titanium dioxide photocatalyst. The titanium dioxide obtained by the preparation method is small in particle diameter, large in specific surface area, strong in absorption capability and stable in property. The preparation method has advantages of simple technology, simple processes, and the like.

Description

technical field [0001] The invention relates to the field of preparation of composite modification of nanometer material titanium dioxide, in particular to a preparation method of microspherical titanium dioxide photocatalyst. Background technique [0002] In the field of nanomaterials research, nano-titanium dioxide, as a functional semiconductor material, has a very wide range of uses in the fields of environmental protection, photoelectric conversion, coating industry and industrial catalysis. Nano-titanium dioxide material has the advantages of low price, non-toxicity, small particle size, less particle agglomeration, uniform and stable shape, and can be recycled, so it is favored in sewage treatment and air purification. [0003] However, titanium dioxide has a wide band gap (3.23 electron volts) and can only be excited by short-wavelength ultraviolet light (λ<387.5 nm), while the relative content of ultraviolet light in natural light is relatively small, accounting ...

Claims

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Application Information

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IPC IPC(8): B01J21/06B01J35/08C01G23/047B82Y30/00B82Y40/00
Inventor 林琳赵斌何丹农
Owner SHANGHAI NAT ENG RES CENT FORNANOTECH
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