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A β-feooh/g-c 3 no 4 Preparation method of heterojunction photocatalytic material

A photocatalytic material, g-c3n4 technology, applied in the field of preparation of β-FeOOH/g-C3N4 heterojunction photocatalytic materials, can solve the problems affecting the rate of hydrogen production by photolysis and the inability to transfer electrons quickly, and achieve the goal of preparing Simple and mature method, low cost and high catalytic efficiency

Active Publication Date: 2022-02-08
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the existence of overpotential, g-C 3 N 4 The electrons generated by photoexcitation cannot be quickly transferred to hydrogen ions, which affects the rate of photolysis hydrogen production.

Method used

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  • A β-feooh/g-c <sub>3</sub> no <sub>4</sub> Preparation method of heterojunction photocatalytic material
  • A β-feooh/g-c <sub>3</sub> no <sub>4</sub> Preparation method of heterojunction photocatalytic material
  • A β-feooh/g-c <sub>3</sub> no <sub>4</sub> Preparation method of heterojunction photocatalytic material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Lumpy g-C 3 N 4 The preparation method:

[0036] Spread the melamine reagent in a ceramic crucible, put it into a muffle furnace and cover it. The heating rate is 5°C / min, and the final temperature is 520°C. After 5 hours of heat preservation, it is cooled to room temperature with the furnace. All the other conditions remained unchanged, and the heat preservation time was changed to 3 hours for thermal polymerization again. The final heating rate is 5°C / min, the final temperature is 550°C, heat preservation for 3 hours and then heat polymerization once, and finally obtain the light yellow product block g-C 3 N 4 .

Embodiment 2

[0038] A β-FeOOH / g-C 3 N 4 A method for preparing a heterojunction photocatalytic material, comprising the steps of:

[0039] (1) Spread the melamine reagent in a ceramic crucible, put it into a muffle furnace and cover it. The heating rate is 5°C / min, and the final temperature is 520°C. After 5 hours of heat preservation, it is cooled to room temperature with the furnace. All the other conditions remained unchanged, and the heat preservation time was changed to 3 hours for thermal polymerization again. The final heating rate is 5°C / min, the final temperature is 550°C, heat preservation for 3 hours and then heat polymerization once, and finally obtain the light yellow product block g-C 3 N 4 ;

[0040] (2) Take 2mol of FeCl 3 ·6H 2 O was dissolved in 15ml of deionized water to obtain FeCl 3 solution, take block g-C 3 N 4 The mass of FeCl 3 ·6H 2 1 / 20 of O, and disperse it in 5ml of ethylene glycol, and ultrasonic 30min, to obtain the GCNS suspension of ultrasonic-as...

Embodiment 3

[0043] One-dimensional FeOOH and two-dimensional g-C 3 N 4 The preparation method of the composite material:

[0044] (1) Spread the melamine reagent in a ceramic crucible, put it into a muffle furnace and cover it. The heating rate is 5°C / min, and the final temperature is 520°C. After 5 hours of heat preservation, it is cooled to room temperature with the furnace. All the other conditions remained unchanged, and the heat preservation time was changed to 3 hours for thermal polymerization again. The final heating rate is 5°C / min, the final temperature is 550°C, heat preservation for 3 hours and then heat polymerization once, and finally obtain the light yellow product block g-C 3 N 4 ;

[0045] (2) Take 1mol of FeCl 3 ·6H 2 Dissolve O in 15ml of deionized water, take block g-C 3 N 4 has a mass of FeCl 3 ·6H 2 1 / 20 of O was dispersed in 5ml of ethylene glycol, and ultrasonicated for 30min to obtain GCNS suspension, FeCl 3 The solution was added to the GCNS suspension...

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Abstract

The present invention disclosed a β 公feooh / g‑c 3 N 4 The preparation method of heterogeneous catalytic materials, including the following steps: put melamine into the box furnace for multiple repeat thermal aggregation reactions to get block g -C 3 N 4 ; 3 N 4 Disposal in the ethylene glycol that is scattered 5020ml, ultrasonic 10-40min, and finally obtained the GCNS suspension of the ultrasonic auxiliary liquid -phase stripped; 3 Add the solution to the GCNS suspension liquid, mix, stir well, then perform the solvent thermal reaction, finally washed and dry, obtained a one -dimensional β‑feooh nano stick and two -dimensional G‑C 3 N 4 The composite material of thin slices; put the above -mentioned dry materials in the Maval furnace for heat treatment, and finally get β‑feooh / g‑c 3 N 4 Heterogeneous knot material.The preparation methods of the present invention are simple and mature, low cost, and good chemical stability of materials, strong pollutant degradation ability, and high catalytic efficiency.

Description

technical field [0001] The present invention relates to a kind of β-FeOOH / g-C 3 N 4 The invention relates to a preparation method of a heterojunction photocatalytic material, which belongs to the technical field of materials. Background technique [0002] Currently, the ever-increasing consumption and shortage of fossil fuels and their combustion to generate CO 2 Bring a series of energy and environmental problems. Photocatalytic technology has shown great potential in producing clean energy and has been extensively studied due to its ability to harness abundant solar energy. In recent years, the research on photocatalytic water splitting hydrogen production has been paid more and more attention by various countries. The mechanism is that semiconductor materials generate photogenerated electron-hole pairs with reducing and oxidizing abilities by effectively absorbing light energy, and generate direct or indirect electron-hole pairs on the surface of the catalyst. Oxidati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24
CPCB01J27/24B01J35/39
Inventor 鲍智勇杨标邢孟孟吕珺秦永强韩骐震汪嘉恒张勇吴玉程
Owner HEFEI UNIV OF TECH
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