Preparation method and application of ferroferric oxide-graphite carbon nitride composite magnetic photocatalyst

A technology of ferroferric oxide and carbon nitride-like, which is applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., which can solve the problem of not being able to achieve solid-liquid separation well, limiting the range of visible light absorption, Photocatalyst extraction and other issues, to achieve the effect of improving photocatalyst efficiency, broad application prospects, and fast speed

Inactive Publication Date: 2019-04-19
EAST CHINA JIAOTONG UNIVERSITY
View PDF2 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the low photocatalytic activity and the difficulty of solid-liquid separation limit the wide application of graphitic carbon nitride in industry.
The low photocatalytic activity is due to the solid-state quantum yield of only 5%, while its specific surface area is less than 10m 2 /g, cannot provide more active sites for photocatalytic reactions; secondly, the bandgap width of graphitic carbon nitride is 2.7eV, which limits

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method and application of ferroferric oxide-graphite carbon nitride composite magnetic photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A preparation method of ferric oxide-graphite carbon nitride composite magnetic photocatalyst, comprising the steps of:

[0029] a) Put dicyandiamide, the precursor of graphite-based carbon nitride, in a muffle furnace, and heat it in an air atmosphere at 500 °C for 2.0 h, with a heating rate of 2.5 °C min -1 , to be cooled to room temperature, ground into powder, that is graphite carbon nitride;

[0030] b) Mix choline chloride and urea at a mass ratio of 1:1, and dissolve them in 5ml of deionized water. After mixing, place the solution at 35°C for 20 minutes to prepare a deep eutectic solvent;

[0031] c) the graphitic carbon nitride and FeSO prepared in step a) 4 ·7H 2 O and NaOH were mixed according to the mass ratio of 1:0.05:0.018, and added to the deep eutectic solvent prepared in step b), reacted at 30°C for 20min, and the stirring speed was 500r·min -1 ;

[0032] d) Add 0.0126g of NaOH to the mixed solution prepared in step c), react at 70°C for 20min, tran...

Embodiment 2

[0036] A preparation method of ferric oxide-graphite carbon nitride composite magnetic photocatalyst, comprising the steps of:

[0037] a) Put graphite carbon nitride precursor melamine in a muffle furnace, heat at 520 °C for 2.5 h in an air atmosphere, and the heating rate is 3.0 °C min -1 , to be cooled to room temperature, ground into powder, that is graphite carbon nitride;

[0038] b) Mix choline chloride and urea at a mass ratio of 1.2:1, and dissolve them in 10ml of deionized water. After mixing, place the solution at 50°C for 30 minutes to prepare a deep eutectic solvent;

[0039] c) the graphitic carbon nitride and FeSO prepared in step a) 4 ·7H 2 O and KOH were mixed according to the mass ratio of 1:0.1:0.036, and added to the deep eutectic solvent prepared in step b), reacted at 50°C for 30min, and the stirring rate was 600r·min -1 ;

[0040] d) Add 0.0252g of KOH to the mixed solution prepared in step c), react at 80°C for 30min, transfer to the reaction kettle...

Embodiment 3

[0044] A preparation method of ferric oxide-graphite carbon nitride composite magnetic photocatalyst, comprising the steps of:

[0045] a) Put graphite carbon nitride precursor thiourea in a muffle furnace, heat at 550 °C for 3.0 h in an air atmosphere, and the heating rate is 3.5 °C min -1 , to be cooled to room temperature, ground into powder, that is graphite carbon nitride;

[0046]b) Mix choline chloride and urea according to the mass ratio of 1.5:1, and dissolve them in 15ml of deionized water. After mixing, place the solution at 65° C. for 40 minutes to prepare a deep eutectic solvent;

[0047] c) the graphitic carbon nitride, FeCl prepared in step a) 2 4H 2 O and KOH were mixed according to the mass ratio of 1:0.2:0.072, and added to the deep eutectic solvent prepared in step b), reacted at 40°C for 40min, and the stirring rate was 700r·min -1 ;

[0048] d) Add 0.0504g of KOH to the mixed solution prepared in step c), react at 90°C for 40min, transfer to the reacti...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention belongs to the technical field of visible light photocatalyst, and relates to a preparation method and application of ferroferric oxide-graphite carbon nitride composite magnetic photocatalyst. The preparation method comprises the following steps that firstly, a graphite carbon nitride precursor is heated to obtain graphite carbon nitride; secondly, choline chloride, urea and deionized water are mixed to perform a reaction for 20-40 minutes at the temperature of 35-65 DEG C so as to obtain a deep eutectic solvent; thirdly, the graphite carbon nitride, ferrous salt, inorganic alkali and the deep eutectic solvent were mixed and transferred to a reaction kettle to perform a reaction for 3-5 hours at the temperature of 100-130DEG C, then the reaction product is washed and crushedafter natural cooling. The preparation process is simple. By modifying traditional graphite carbon nitride, organic pollutants can be degraded efficiently and quickly, meanwhile the solid-liquid separation can be quickly carried out on the photocatalyst after the reaction under the condition of an external magnetic field. The wastewater containing methylene blue is removed through an experiment simulation, and the result shows that the photocatalytic degradation efficiency of methylene blue is more than 95%, which provides a reliable theoretical and practical support for practical application.

Description

technical field [0001] The invention belongs to the technical field of visible light photocatalysts, and relates to the preparation of graphite carbon nitride photocatalysts, in particular to a preparation method and application of a ferric oxide-graphite carbon nitride composite magnetic photocatalyst. Background technique [0002] At present, the environmental problems faced by human beings are becoming more and more severe, and the energy shortage has attracted extensive attention of many researchers in recent years. Under this background, the research on photocatalyst technology has been favored by researchers. Graphite carbon nitride is a new type of visible light photocatalyst. Its synthesis method is simple, its material properties are stable, and its precursor is cheap. It can be used for hydrogen production and catalytic degradation of organic pollutants in water. [0003] However, the low photocatalytic activity and the difficulty of solid-liquid separation limit t...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): B01J27/24B01J37/08C02F1/30C02F101/30C02F101/38
CPCB01J27/24B01J35/0033B01J35/004B01J37/082C02F1/30C02F2101/30C02F2101/308C02F2101/38C02F2305/10
Inventor 胡锋平罗文栋彭小明胡玉瑛戴红玲徐嘉翔
Owner EAST CHINA JIAOTONG UNIVERSITY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap