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Preparation method of spherical gadolinium-doped titanium dioxide photocatalyst

A spherical photocatalyst, titanium dioxide technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve complex processes, waste of raw materials, difficult control of mixing speed, etc. problems, to achieve the effect of stable product properties, high application value, and high dispersibility

Inactive Publication Date: 2012-11-21
SHANGHAI JIAO TONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] At present, most of the preparation of titanium dioxide photocatalyst involving sol-gel method is to prepare two kinds of A and B solutions, and then slowly mix the two solutions, and undergo hydrolysis reaction to obtain the required sol or gel. The process is relatively complicated, and in During the mixing process of the two solutions, the mixing speed is not easy to control and it is easy to cause waste of raw materials

Method used

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  • Preparation method of spherical gadolinium-doped titanium dioxide photocatalyst
  • Preparation method of spherical gadolinium-doped titanium dioxide photocatalyst
  • Preparation method of spherical gadolinium-doped titanium dioxide photocatalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0036] A sol-gel method is used to prepare gadolinium-doped nano-titanium dioxide photocatalysts, and the specific steps are as follows:

[0037] (1) Prepare a mixed solution of 10ml tetrabutyl titanate, 60ml absolute ethanol and 1ml nitric acid and stir.

[0038] (2) Add 0.0258 g of gadolinium nitrate (0.2% by mole to titanium dioxide) into the above solution, and stir to dissolve it completely.

[0039] (3) Add 2 ml of deionized water to the above solution, and vigorously stir (800 rpm) while the tetrabutyl titanate is rapidly hydrolyzed to make it evenly mixed.

[0040] (4) The obtained mixed solution was dried in a constant temperature drying oven at 60° C. for 24 hours.

[0041] (5) Grinding the obtained product and calcining it in a muffle furnace at 450° C. for 3 hours to obtain gadolinium-doped titanium dioxide nanoparticles.

[0042] The prepared anatase-type doped titanium dioxide has a small crystal grain size of about 10.89 nanometers, and its photocatalytic acti...

Embodiment 2

[0044] A sol-gel method is used to prepare gadolinium-doped nano-titanium dioxide photocatalysts, and the specific steps are as follows:

[0045] (1) Prepare a mixed solution of 10ml tetrabutyl titanate, 60ml absolute ethanol and 1ml nitric acid and stir.

[0046] (2) Add 0.0529 g of gadolinium nitrate (0.4% by mole to titanium dioxide) into the above solution, and stir to dissolve it completely.

[0047] (3) Add 2 ml of deionized water to the above solution, and stir vigorously (rotating at 800 rpm) to make it evenly mixed while the tetrabutyl titanate is rapidly hydrolyzed.

[0048] (4) The obtained mixed solution was dried in a constant temperature drying oven at 80° C. for 12 hours.

[0049] (5) Grinding the obtained product and calcining it in a muffle furnace at 450° C. for 3 hours to obtain gadolinium-doped titanium dioxide nanoparticles.

[0050] The obtained product was characterized by XRD and SEM for its structure and crystal form, figure 1 , 2 XRD and SEM patte...

Embodiment 3

[0052] The rare earth gadolinium-doped nano-titanium dioxide photocatalyst was prepared by a sol-gel method, and the specific steps were as follows:

[0053] (1) Prepare a mixed solution of 10ml tetrabutyl titanate, 60ml absolute ethanol and 1ml nitric acid and stir.

[0054] (2) Add 0.0792 g of gadolinium nitrate (0.6% by mole to titanium dioxide) into the above solution, and stir to dissolve it completely.

[0055] (3) Add 3 ml of deionized water to the above solution, and vigorously stir (rotating at 800 rpm) while the tetrabutyl titanate is rapidly hydrolyzed to make it evenly mixed.

[0056] (4) The obtained mixed solution was dried in a constant temperature drying oven at 80° C. for 12 hours.

[0057] (5) Grinding the obtained product and calcining it in a muffle furnace at 450° C. for 3 hours to obtain gadolinium-doped titanium dioxide nanoparticles.

[0058] The product of gadolinium-doped titania has good crystallinity, and its average particle size is about 6.59 nm...

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Abstract

The invention discloses a preparation method of a spherical gadolinium-doped titanium dioxide photocatalyst. The method comprises: using a sol-gel method to add tetrabutyl titanate into anhydrous ethanol, and adding nitric acid, gadolinium nitrate and distilled water during stirring, stirring them to make ions fully enter the interior or surface of titanium dioxide, then putting the mixture into a constant temperature drying box for drying, then grinding the product into powder, and putting the obtained powder in a muffle furnace for calcination, thus obtaining the rare earth gadolinium-doped nanometer titanium dioxide photocatalyst. The preparation method can load rare earth gadolinium ions on the interiors or surfaces of titanium dioxide nanoparticles successfully, and in a prepared sample, the gadolinium ions have high dispersity in titanium dioxide. The product has stable properties. And the method has the advantages of simple technology and process 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 gadolinium-doped titanium dioxide spherical 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 nanometers), while the relative content of ultraviolet light in natural light is relativel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/10B01J35/08
Inventor 柴瑜超林琳赵斌余震何丹农
Owner SHANGHAI JIAO TONG UNIV
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