Preparation method of beta-FeOOH/g-C3N4 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 of affecting the rate of hydrogen production by photolysis, the inability of electrons to be transferred quickly, etc. The method is simple and mature, the cost is low, and the catalytic efficiency is high.

Active Publication Date: 2019-07-12
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 canno

Method used

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  • Preparation method of beta-FeOOH/g-C3N4 heterojunction photocatalytic material
  • Preparation method of beta-FeOOH/g-C3N4 heterojunction photocatalytic material
  • Preparation method of beta-FeOOH/g-C3N4 heterojunction photocatalytic material

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0035] Example 1

[0036] Block g-C 3 N 4 Preparation method:

[0037] Spread the melamine reagent flat in a ceramic crucible, put it in a muffle furnace and close the lid. The heating rate is 5°C / min, and the final temperature is 520°C. After holding for 5 hours, the furnace is cooled to room temperature. The other conditions remain unchanged, and the holding time is changed to 3 hours for thermal polymerization again. Finally, the heating rate is 5℃ / min, and the final temperature is 550℃. After keeping for 3 hours, heat and polymerize once again, and finally obtain the light yellow product lump g-C. 3 N 4 .

Example Embodiment

[0038] Example 2

[0039] A β-FeOOH / g-C 3 N 4 The preparation method of heterojunction photocatalytic material includes the following steps:

[0040] (1) Spread the melamine reagent in a ceramic crucible, put it in the muffle furnace and close the lid. The heating rate is 5°C / min, and the final temperature is 520°C. After holding for 5 hours, the furnace is cooled to room temperature. The other conditions remain unchanged, and the holding time is changed to 3 hours for thermal polymerization again. Finally, the heating rate is 5℃ / min, and the final temperature is 550℃. After keeping for 3 hours, heat and polymerize once again, and finally obtain the light yellow product lump g-C. 3 N 4 ;

[0041] (2) Take 2mol FeCl 3 ·6H 2 O is dissolved in 15ml of deionized water to get FeCl 3 Solution, take block g-C 3 N 4 The mass is FeCl 3 ·6H 2 1 / 20 of O, and disperse it in 5ml of ethylene glycol, and ultrasonicate for 30min to obtain a GCNS suspension with ultrasonic-assisted liquid phase stri...

Example Embodiment

[0043] Example 3

[0044] One-dimensional FeOOH and two-dimensional g-C 3 N 4 The preparation method of the composite material:

[0045] (1) Spread the melamine reagent in a ceramic crucible, put it in the muffle furnace and close the lid. The heating rate is 5°C / min, and the final temperature is 520°C. After holding for 5 hours, the furnace is cooled to room temperature. The other conditions remain unchanged, and the holding time is changed to 3 hours for thermal polymerization again. Finally, the heating rate is 5℃ / min, and the final temperature is 550℃. After keeping for 3 hours, heat and polymerize once again, and finally obtain the light yellow product lump g-C. 3 N 4 ;

[0046] (2) Take 1mol FeCl 3 ·6H 2 Dissolve O in 15ml of deionized water, take the block g-C 3 N 4 The mass is FeCl 3 ·6H 2 Disperse 1 / 20 of O in 5ml of ethylene glycol and sonicate for 30min to obtain a GCNS suspension. The FeCl 3 The solution was added to the GCNS suspension, mixed and stirred for 10 minutes,...

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Abstract

The invention discloses a preparation method of a beta-FeOOH/g-C3N4 heterojunction photocatalytic material. The preparation method of the FeOOH/g-C3N4 heterojunction photocatalytic material comprisesthe following steps of: placing melamine into a box-type furnace for multiple repeated thermal polymerization reactions to obtain block-shaped g-C3N4; dispersing the block-shaped g-C3N4 in 5-20 ml ofethylene glycol, and performing ultrasonic treatment for 10-40 minutes to finally obtain ultrasonic-assisted liquid-phase stripped GCNS suspension; adding FeCl3 solution into the GCNS suspension, mixing, fully and uniformly stirring, carrying out a solvent thermal reaction, and finally performing centrifugal washing and drying to obtain a composite material of a one-dimensional beta-FeOOH nanorodand a two-dimensional g-C3N4 sheet; placing the dried composite material into a muffle furnace for heat treatment to finally obtain the beta-FeOOH/g-C3N4 heterojunction material. The preparation method is simple, mature, and low in cost, and the prepared material is good in material chemical stability, strong in pollutant degradation capability and high in 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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IPC IPC(8): B01J27/24
CPCB01J35/004B01J27/24
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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