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Photocatalytic material as well as preparation method and application thereof

A photocatalytic material and visible light technology, applied in chemical instruments and methods, physical/chemical process catalysts, inorganic chemistry, etc., can solve the problems of small specific surface, unstable nano photocatalytic materials, weak absorption of visible light, etc., and achieve porosity High, improved photocatalytic activity, high stability effect

Inactive Publication Date: 2017-06-23
中紫能源科技(舟山)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the above-mentioned technical problems in the prior art, the present invention provides a photocatalytic material and its preparation method and application. The preparation method of this material should solve the problem that the specific surface of the material in the prior art is small and absorbs visible light. Technical problems such as weak and unstable nano-photocatalytic materials

Method used

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  • Photocatalytic material as well as preparation method and application thereof
  • Photocatalytic material as well as preparation method and application thereof
  • Photocatalytic material as well as preparation method and application thereof

Examples

Experimental program
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Embodiment 1

[0035] Production steps of photocatalytic materials:

[0036] a. With deionized water as solvent, Ga(NO 3 ) 3 ·zH 2 O and (Zn(CH 3 COO) 2 2H 2 O) is a solute, and the molar ratio of gallium element to zinc element is 1:2, that is, Ga:Zn=1:2. Prepare a Ga-Zn mixed solution with a concentration of 1.2mol / L;

[0037] b. Using ethanol as a solvent and polyvinylpyrrolidone as a solute, prepare a polyvinylpyrrolidone solution with a concentration of 0.5 g / mL;

[0038] c. the Ga-Zn mixed solution of step a and the polyvinylpyrrolidone solution of step b are mixed and stirred for 12h, the mass ratio of the gallium salt / zinc salt in step a and the polyvinylpyrrolidone of step b is 2:1, and it Collected into the injection device for later use;

[0039] d. Put the injection device configured in step 3) into the electrospinning machine. The parameters are set as follows: the temperature in the spinning machine is maintained at 40°C, the relative humidity is 20%, and the voltage be...

Embodiment 2

[0041] Embodiment 2: This embodiment is basically the same as Embodiment 1, except that the molar ratio of Ga:Zn in step a is 1:1.

Embodiment 3

[0042] Embodiment 3: This embodiment is basically the same as Embodiment 1, except that the molar ratio of Ga:Zn in step a is 1:3.

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Abstract

The invention belongs to the field of semiconductor materials, and relates to a photocatalytic material. The photocatalytic material is prepared by compounding hollow (GaN)1-x(ZnO)x composite nano-fibers and Rh2-yCryO3, wherein the mass percent of the Rh2-yCryO3 in the photocatalytic material is 1 weight percent to 5 weight percent; the invention further provides a preparation method of the photocatalytic material; the preparation method comprises the following steps: carrying out electrostatic spinning, calcining and ammoniating in ammonia gas to obtain the (GaN)1-x(ZnO)x composite nano-fibers with a hollow structure; mixing the (GaN)1-x(ZnO)x composite nano-fibers with the hollow structure with the co-catalyst Rh2-yCryO3 to obtain powder, namely the photocatalytic material. The invention further provides application of the photocatalytic material used as a photocatalyst for decomposing water by visible light to prepare hydrogen. The photocatalytic main body material provided by the method has a hollow fiber structure ,and has the advantages of relatively high visible light absorption, large specific surface area and abundant pore structures; the yield of preparing the hydrogen through decomposing the water by the visible light is 1.83mu mol / h.

Description

technical field [0001] The invention belongs to the field of semiconductor materials, and relates to a photocatalytic material, in particular to a photocatalytic material for visible light decomposition of water to produce hydrogen and a preparation method thereof. Background technique [0002] As an important catalyst, nano-ZnO has the advantages of high photocatalytic activity, non-toxicity, low dielectric constant, strong ultraviolet and infrared absorption, and photoelectrochemical stability. Widespread concern. However, ZnO has a wide band gap energy, the absorption of light is limited to the ultraviolet region, and the recombination probability of electron-hole pairs is high, which greatly limits its popularization and application. Therefore, in order to improve the photocatalytic performance of ZnO, it is necessary to modify ZnO, on the one hand, to reduce the band gap, so that it can show good photoelectric response in the visible and ultraviolet regions, and on the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J35/10B01J35/06C01B3/04
CPCC01B3/042B01J27/24C01B2203/1076C01B2203/0277B01J35/39B01J35/58B01J35/613Y02E60/36
Inventor 王丁曾明树卢冰洁
Owner 中紫能源科技(舟山)有限公司