Supported photocatalyst and preparation method thereof

A photocatalyst, supported technology, applied in the field of supported photocatalyst and its preparation, can solve the problems of low coverage, easy to fall off, photocatalyst particles cannot cover the metal mesh in sufficient amount, etc., to increase the adhesion rate, not easy to fall off, The effect of enhancing the binding force

Pending Publication Date: 2021-10-08
HENGSHUI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the prior art, photocatalyst particles are bonded by forming a bonding layer of hydrated silica on the surface of the metal mesh, but the above-mentioned bonding layer has a low coverage on the metal mesh and is easy to fall off, resulting in photocatalyst particles Inability to adequately cover metal mesh

Method used

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  • Supported photocatalyst and preparation method thereof
  • Supported photocatalyst and preparation method thereof

Examples

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preparation example Construction

[0034] The present invention also provides a preparation method of loaded photocatalyst, comprising the following process:

[0035] Step S1: providing a metal mesh. The material of the metal mesh can be iron, aluminum, iron alloy, aluminum alloy and the like.

[0036] Step S2: forming a metal oxide layer on the surface of the metal mesh.

[0037] In this step, in a specific embodiment, the metal mesh can be oxidized by the concentrated acid to form a dense metal oxide layer, and the formed metal oxide layer is not easy to fall off.

[0038] Step S3: Mix vinylpyrrolidone and waterproof organic polymer monomers, and copolymerize to form an organic compound.

[0039] Step S4: disperse the organic compound and photocatalyst particles in a solvent to obtain a coating liquid.

[0040] The solvent may be a polar solvent, such as water, ethanol or the like.

[0041] Step S5: forming a coating solution on the surface of the metal oxide layer, curing the coating solution to obtain a...

Embodiment 1

[0044] 1) Cut a metal mesh with an area of ​​5cm*5cm and place it in concentrated sulfuric acid with a concentration of 98%, so that the surface of the metal mesh is covered with an oxide layer of black iron oxide.

[0045] 2) Mix vinylpyrrolidone and methyl methacrylate with a molar ratio of 1:3, add potassium persulfide as an initiator with a mass content of 1.5%, heat to 80°C, stir while heating, react for 8 hours, and then, Cured under ultraviolet light, rinsed repeatedly with distilled water and then used for later use.

[0046] 3) Dissolve the organic compound prepared in step 2) in dichloroethane solvent, fully disperse, continue to add graphene, titanium dioxide, and curcumin to the solvent, and fully mix under 100r / min magnetic stirring to obtain coating liquid, in the coating liquid, the mass percentage of the organic compound to the total mass of the coating liquid is 5%, the mass percentage of the photocatalyst titanium dioxide to the total mass of the coating liquid...

Embodiment 2～5

[0049] The difference between Examples 2-5 and Example 1 lies in the proportion of the organic compound and the concentration of the organic compound in the coating liquid, and the rest are the same.

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Abstract

The invention discloses a supported photocatalyst and a preparation method thereof. The supported photocatalyst comprises a metal net, a metal oxide layer formed on the surface of the metal net and a coating layer formed on the surface of the metal oxide layer, and the coating comprises an organic compound formed by copolymerizing vinyl pyrrolidone and a waterproof organic polymer monomer, and photocatalyst particles dispersed in the organic compound. According to the invention, the coverage rate of the photocatalyst on the metal mesh can be increased, and the photocatalytic degradation efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of photocatalytic degradation of sewage, in particular to a loaded photocatalyst and a preparation method thereof. Background technique [0002] In the application of water pollution, the photocatalytic degradation technology is mainly carried out in the following two ways: one is carried out through the suspension system, and the photocatalyst is directly suspended in the water system. Disadvantages such as agglomeration and difficulty in recycling have relatively high cost, large waste, and secondary pollution problems in practical applications; the other is used by loading on a certain carrier, which has the following advantages: (1) Cover the catalyst On the surface of the carrier, its specific surface area can be greatly increased, thereby increasing the efficiency and dosage of the photocatalyst; (2) The supported photocatalyst is beneficial to the attachment and recycling of the catalyst. [0003] Us...

Claims

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Application Information

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IPC IPC(8): B01J31/06B01J31/38C02F1/30C02F101/38
CPCB01J31/06B01J31/38C02F1/30C02F2305/10C02F2101/38B01J35/39Y02W10/37
Inventor 张彦张丽李顺军
Owner HENGSHUI UNIVERSITY
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