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Method for assembling Van der Waals heterojunction photocatalysis and photoelectrocatalysis materials from bottom to top

A photocatalytic material and photoelectric catalysis technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problem of high cost of separation and recovery, hindering the industrial application of photocatalytic materials, and unfavorable photocatalytic reactions. Equipment design and other issues, to achieve the effect of simple and easy method, excellent photocatalytic and photocatalytic cycle performance

Pending Publication Date: 2022-03-01
LUOYANG INST OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In terms of photocatalytic treatment of organic wastewater, the separation and recycling of traditional powder photocatalytic materials is costly, and it is not conducive to the design of photocatalytic reaction equipment. The above problems hinder the industrial application of photocatalytic materials.

Method used

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  • Method for assembling Van der Waals heterojunction photocatalysis and photoelectrocatalysis materials from bottom to top
  • Method for assembling Van der Waals heterojunction photocatalysis and photoelectrocatalysis materials from bottom to top
  • Method for assembling Van der Waals heterojunction photocatalysis and photoelectrocatalysis materials from bottom to top

Examples

Experimental program
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Effect test

Embodiment 1

[0044] A bottom-up assembly method of van der Waals heterojunction photocatalysis and photoelectrocatalysis materials, comprising the following steps:

[0045] 1) Add 0.020 g of zero-dimensional P25 photocatalytic material to 10 mmol / L tris(hydroxymethyl)aminomethane aqueous solution, and disperse it by ultrasonic wave for 60 minutes to obtain suspension solution A;

[0046] 2) Under stirring, add 0.010 g of dopamine to the solution A. The dopamine undergoes dopamine polymerization reaction on the surface of the powder photocatalytic material. The dopamine polymerization reaction time is 5 h, and the dopamine forms a uniform polydopamine coating on the surface of the photocatalytic material;

[0047] 3) The dopamine polymerization product was separated by centrifugation, washed three times with deionized water, dried at 90 °C for 10 h, kept under argon atmosphere, and roasted at 400 °C for 12 h. During the roasting process, the argon flow rate was 50 SCCM. The layer is carboni...

Embodiment 2

[0051] A bottom-up assembly method of van der Waals heterojunction photocatalysis and photoelectrocatalysis materials, comprising the following steps:

[0052] 1) Add 0.020 g of one-dimensional TiO 2 Add fibers to 10 mmol / L tris(hydroxymethyl)aminomethane aqueous solution, and ultrasonically disperse for 60 minutes to obtain suspension solution A;

[0053] 2) With stirring, add 0.010 g dopamine to solution A, dopamine in powdered TiO 2 The dopamine polymerization reaction was carried out on the surface of the fiber, and the dopamine polymerization reaction time was 5 h. 2 A uniform polydopamine coating is formed on the fiber surface;

[0054] 3) The dopamine polymerization product was separated by centrifugation, washed three times with deionized water, dried at 90 °C for 10 h, kept under argon atmosphere, and calcined at 400 °C for 12 h. During the roasting process, the argon flow rate was 50 SCCM, TiO 2 The polydopamine coating on the fiber surface is carbonized into a ca...

Embodiment 3

[0058] A bottom-up assembly method of van der Waals heterojunction photocatalysis and photoelectrocatalysis materials, comprising the following steps:

[0059] 1) Dilute 0.020 g of two-dimensional g-C 3 N 4 Nanosheets were added to 10 mmol / L tris(hydroxymethyl)aminomethane aqueous solution, and ultrasonically dispersed for 60 minutes to obtain suspension solution A;

[0060] 2) With stirring, add 0.010 g dopamine to solution A, dopamine in g-C 3 N 4 The dopamine polymerization reaction was carried out on the surface of the nanosheets, the dopamine polymerization reaction time was 5 h, and the dopamine 3 N 4 A uniform polydopamine coating is formed on the surface of the nanosheets;

[0061] 3) The dopamine polymerization product was separated by centrifugation, washed three times with deionized water, dried at 90 °C for 10 h, kept under argon atmosphere, and calcined at 400 °C for 12 h. During the roasting process, the argon flow rate was 50 SCCM, g-C 3 N 4 Carbonization...

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Abstract

The invention relates to a method for assembling Van der Waals heterojunction photocatalysis and photoelectrocatalysis materials from bottom to top, and belongs to the field of photocatalysis and photoelectrocatalysis materials.The method comprises the following steps that a nanometer powder photocatalysis material is added into a tris (hydroxymethyl) aminomethane aqueous solution, and dispersion is conducted to obtain a solution A; adding dopamine, and carrying out dopamine polymerization reaction on the surface of the powder photocatalytic material to obtain a product B; centrifugally separating, washing, drying and roasting to obtain a product C; adding the product C into deionized water, and dispersing to obtain a suspension D; and immersing a carbon fiber fabric into the suspension D, and assembling the product C and the carbon fiber fabric to form the macroscopic van der Waals heterojunction photocatalysis and photoelectrocatalysis material. The powder photocatalytic material is assembled on the surface of the carbon fiber fabric through Van der Waals action from bottom to top, the obtained product is easy to separate and recover, the method is simple and easy to implement, the process is environment-friendly, the problem of separation and recovery of the powder photocatalyst is solved, and a new way is developed for industrial application of photocatalysis.

Description

technical field [0001] The invention belongs to the field of synthesis of photocatalytic and photoelectric catalytic materials, and in particular relates to a bottom-up van der Waals heterojunction photocatalytic and photoelectric catalytic material assembly method. Background technique [0002] Solar photocatalysis is of great significance in air purification and water treatment, and is expected to solve environmental problems. The photocatalytic process includes light absorption, carrier separation and surface reaction, and the photocatalytic efficiency of materials mainly depends on the above three processes. In terms of photocatalytic treatment of organic wastewater, the separation and recycling of traditional powder photocatalytic materials is costly, and it is not conducive to the design of photocatalytic reaction equipment. The above problems hinder the industrial application of photocatalytic materials. Contents of the invention [0003] In view of the above-menti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/06B01J21/18B01J27/24B01J35/00B01J35/06C02F1/30C02F1/461C02F101/38
CPCB01J21/063B01J21/18B01J27/24C02F1/30C02F1/46109C02F2001/46142C02F2305/10C02F2101/38B01J35/396B01J35/397B01J35/33B01J35/58B01J35/39
Inventor 陈华军席晓晶赵莉李冬田文杰王小庆
Owner LUOYANG INST OF SCI & TECH
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