Method and product for preparing photocatalyst nanomaterial from vanadium-titanium industrial waste residue

A technology of industrial waste slag and nanomaterials, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve problems such as the inability to use visible light, ineffective use of vanadium and titanium, and loss of sunlight energy. Good photocatalyst activity and stability, comprehensive utilization rate improvement, photocatalytic activity improvement effect

Active Publication Date: 2021-10-08
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Titanium dioxide has the characteristics of stable physical and chemical properties, non-toxicity, thermal stability, and optimal whiteness, but it has disadvantages such as high preparation cost and low visible light absorption.
Titanium dioxide can only absorb ultraviolet light, which accounts for 4-5% of solar energy, and about 50% of visible light cannot be used, losing most of the energy of sunlight
However, the above-mentioned comprehensive utilization methods have not effectively utilized various elements in the vanadium-titanium industrial waste slag.

Method used

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  • Method and product for preparing photocatalyst nanomaterial from vanadium-titanium industrial waste residue
  • Method and product for preparing photocatalyst nanomaterial from vanadium-titanium industrial waste residue
  • Method and product for preparing photocatalyst nanomaterial from vanadium-titanium industrial waste residue

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Preparation of a vanadium-titanium industrial waste slag to prepare photocatalyst nanomaterials

[0039] (1) Put the vanadium-titanium industrial waste residue into a double-pot planetary ball mill and mill for 12 hours, wherein the grinding bowl is 160mL, the grinding sample volume is 50mL, and the zirconia ball with a diameter of 1cm is used as the grinding ball, and the rotational speed during grinding is 200r / min Obtain vanadium-titanium industrial waste slag powder with a particle size of 100nm-5μm;

[0040] (2) Add the vanadium-titanium industrial waste slag powder obtained in step (1) into a reaction kettle containing a sodium hydroxide solution with a pH value of 14.0, and react at 220° C. for 24 hours; the vanadium-titanium industrial waste powder obtained in step (1) The mass volume ratio of waste residue powder to sodium hydroxide solution is 1:20;

[0041] (3) adding the vanadium-titanium industrial waste slag powder treated in step (2) into hydrochloric ac...

Embodiment 2

[0045] Preparation of a vanadium-titanium industrial waste slag to prepare photocatalyst nanomaterials

[0046] (1) Put the vanadium-titanium industrial waste residue into a double-pot planetary ball mill and mill for 12 hours, wherein the grinding bowl is 160mL, the grinding sample volume is 50mL, and the zirconia ball with a diameter of 1cm is used as the grinding ball, and the rotational speed during grinding is 200r / min Obtain vanadium-titanium industrial waste slag powder with a particle size of 100nm-5μm;

[0047](2) Add the vanadium-titanium industrial waste slag powder obtained in step (1) into a reactor containing a potassium hydroxide solution with a pH value of 13.5, and react at 240° C. for 36 hours; the vanadium-titanium industrial waste powder obtained in step (1) The mass volume ratio of waste residue powder and potassium hydroxide solution is 3:50;

[0048] (3) adding the vanadium-titanium industrial waste slag powder after the treatment in step (2) into the n...

Embodiment 3

[0052] Preparation of a vanadium-titanium industrial waste slag to prepare photocatalyst nanomaterials

[0053] (1) Put the vanadium-titanium industrial waste residue into a double-pot planetary ball mill and mill for 12 hours, wherein the grinding bowl is 160mL, the grinding sample volume is 50mL, and the zirconia ball with a diameter of 1cm is used as the grinding ball, and the rotational speed during grinding is 200r / min Obtain vanadium-titanium industrial waste slag powder with a particle size of 100nm-5μm;

[0054] (2) Add the vanadium-titanium industrial waste slag powder obtained in step (1) into a reaction kettle containing a sodium hydroxide solution with a pH value of 15.0, and react at 180° C. for 72 hours; the vanadium-titanium industrial waste powder obtained in step (1) The mass volume ratio of waste residue powder to sodium hydroxide solution is 1:60;

[0055] (3) adding the vanadium-titanium industrial waste slag powder after the treatment of step (2) into a h...

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Abstract

The invention relates to a method and product for preparing photocatalyst nanomaterials from vanadium-titanium industrial waste residues, which belong to the technical field of photocatalyst materials. The method uses vanadium-titanium industrial waste residues as raw materials, and the raw materials are nanometerized in a strong alkali solution by a hydrothermal method, and then Ion replacement is carried out in acid solution, followed by crystallization reaction, and finally impurities are removed to obtain photocatalyst nanomaterials. The photocatalyst nanomaterial has near-full-spectrum (300-800nm) light absorption characteristics, good photocatalyst activity and stability, compared to conventional P25 titanium dioxide (average particle size is 25 nanometers of anatase crystal and rutile crystal mixed phase) Titanium dioxide), the photocatalyst nanomaterial increases the photocatalytic activity by 3.8 times. The preparation method of the present invention is simple, easy to operate and high in yield, improves the comprehensive utilization rate of vanadium and titanium industrial waste residue by about 80%, not only saves energy consumption, but also reduces costs, and is suitable for industrialized production.

Description

technical field [0001] The invention belongs to the technical field of photocatalyst materials, and in particular relates to a method and a product for preparing photocatalyst nanomaterials from industrial waste residues of vanadium and titanium. Background technique [0002] In chemistry, a photocatalyst refers to a catalyst that accelerates photochemical reactions. When light is irradiated on the photocatalyst material, the electrons in the valence band of the photocatalyst material transition to the conduction band, and holes are formed in the valence band. The electrons and holes have strong reducibility and oxidation respectively, which can make the adsorbed substances on the surface of the photocatalyst occur. Redox reactions convert light energy into chemical energy. In the photochemical reaction, the photocatalyst material will not be consumed and can be used continuously. Photocatalyst can effectively degrade formaldehyde, benzene, toluene, xylene, ammonia, volati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/02
CPCB01J27/02B01J35/004
Inventor 谢佳乐杨萍萍于华黄跃龙
Owner SOUTHWEST PETROLEUM UNIV
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