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A preparation method of poly-3-hexylthiophene-coated silver phosphate composite porous zinc oxide photocatalyst

A technology of phene-coated silver phosphate and porous zinc oxide, which is applied in the field of photocatalysis, can solve the problems of poly-3-hexylthiophene charge separation difficulties, reduced photocatalytic degradation ability of zinc oxide, and low hole and electron pair formation ability. Achieve the effect of improving photocatalytic performance, improving photocatalytic degradation efficiency, and preventing shedding

Active Publication Date: 2022-01-25
DONGGUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Photocatalytic technology is an emerging technology developed in the past 30 years. It has broad application prospects in the fields of energy and the environment. Among them, zinc oxide is a type of photocatalytic material widely used in photocatalytic technology. It is 3.37eV, has the advantages of large exciton binding energy, abundant sources, low price, good thermal and chemical stability, and non-toxicity. It has been developed rapidly in recent years, but zinc oxide is used as a photocatalyst in the photocatalytic process Among them, the high recombination rate of photogenerated electrons and holes seriously affects its photocatalytic efficiency. In addition, the photocatalytic degradation ability of zinc oxide has a great relationship with its own morphology and structure. There are many methods to Zn0 with various shapes has been prepared, such as nanorods, nanoflowers, nanowires, etc., but the specific surface area of ​​Zn0 with these shapes is often small, which reduces the photocatalytic degradation ability of zinc oxide
[0003] Poly 3-hexylthiophene is a derivative of polythiophene, which has good stability and light absorption properties, and has unique photoelectric characteristics and high hole transport properties, but poly 3-hexylthiophene charge separation is relatively difficult , resulting in a low ability to form holes and electron pairs

Method used

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  • A preparation method of poly-3-hexylthiophene-coated silver phosphate composite porous zinc oxide photocatalyst
  • A preparation method of poly-3-hexylthiophene-coated silver phosphate composite porous zinc oxide photocatalyst
  • A preparation method of poly-3-hexylthiophene-coated silver phosphate composite porous zinc oxide photocatalyst

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Embodiment 1-7

[0028] A preparation method for poly-3-hexylthiophene coated silver phosphate composite porous zinc oxide photocatalyst, comprising the steps:

[0029] S1. Preparation of porous zinc oxide: Add zinc nitrate hexahydrate into deionized water, and stir at a constant speed to accelerate the dissolution of zinc nitrate hexahydrate in deionized water. After zinc nitrate hexahydrate is dissolved in water, in the continuous stirring process, slowly Add the aqueous solution of oxalic acid and hexamethylenetetramine dropwise. After the dropwise addition is completed, continue to stir and carry out a hydrothermal reaction. After the reaction is completed, obtain a solid through centrifugation, and then wash it with deionized water until it is neutral. Washing with ethanol, placing it in an oven, drying at a constant temperature, and performing calcination after drying to prepare porous zinc oxide;

[0030] S2. Preparation of silver phosphate composite porous zinc oxide: adding the porous...

Embodiment 1

[0039] The SEM image of the porous zinc oxide prepared in step S1 in Example 1 is as follows figure 2 shown by figure 2 It can be seen that the prepared porous zinc oxide is loose and porous; the silver phosphate composite porous zinc oxide XRD spectrum prepared by step S2 is as follows image 3 shown by image 3 It can be seen that all the diffraction peaks in the XRD spectrum are in good one-to-one correspondence with the corresponding zinc oxide and silver phosphate; the SEM image of the poly-3-hexylthiophene-coated silver phosphate composite porous zinc oxide prepared in step S3 is as follows Figure 4 shown by Figure 4 It can be seen that silver phosphate is compounded on the surface of porous zinc oxide, and there is a thin layer of poly-3-hexylthiophene on the surface of silver phosphate compound porous zinc oxide.

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Abstract

The invention belongs to the technical field of photocatalysis, and specifically relates to a method for preparing a poly-3-hexylthiophene-coated silver phosphate composite porous zinc oxide photocatalyst. First, pass zinc nitrate hexahydrate, oxalic acid, and hexamethylenetetramine through Hydrothermal, calcination and other reactions to obtain porous zinc oxide; secondly, the porous zinc oxide, silver nitrate and sodium phosphate were stirred and centrifuged to obtain silver phosphate composite porous zinc oxide; finally, silver phosphate composite porous zinc oxide, poly 3‑hexylthiophene is subjected to operations such as oscillation and centrifugation to obtain poly-3‑hexylthiophene-coated silver phosphate composite porous zinc oxide; The specific surface area, as well as the long-term and efficient photocatalytic degradation effect, have a wide visible light response range and high separation efficiency of holes and photogenerated electrons, which improves the utilization rate of visible light.

Description

technical field [0001] The invention belongs to the technical field of photocatalysis, and in particular relates to a preparation method of poly-3-hexylthiophene-coated silver phosphate composite porous zinc oxide photocatalyst. Background technique [0002] Photocatalytic technology is an emerging technology developed in the past 30 years. It has broad application prospects in the fields of energy and the environment. Among them, zinc oxide is a type of photocatalytic material widely used in photocatalytic technology. It is 3.37eV, has the advantages of large exciton binding energy, abundant sources, low price, good thermal and chemical stability, and non-toxicity. It has been developed rapidly in recent years, but zinc oxide is used as a photocatalyst in the photocatalytic process Among them, the high recombination rate of photogenerated electrons and holes seriously affects its photocatalytic efficiency. In addition, the photocatalytic degradation ability of zinc oxide ha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/26B01J35/10C02F1/30
CPCC02F1/30B01J31/26B01J35/004B01J35/10C02F2305/10
Inventor 徐进邓君
Owner DONGGUAN UNIV OF TECH