Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Preparation method of carbon quantum dot/zinc ferrite composite photocatalytic materials

A technology of composite photocatalysis and carbon quantum dots, applied in the field of photocatalysis, can solve the problems of high degradation rate and inability to degrade nitrogen oxides, etc., and achieve the effects of high degradation efficiency, cheap and easily available raw materials, and low synthesis cost.

Active Publication Date: 2016-05-25
INST OF EARTH ENVIRONMENT CHINESE ACAD OF SCI
View PDF9 Cites 29 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent CN103480353A uses vitamin C as a carbon source, water and ethanol as a mixed solvent, synthesizes carbon quantum dots by hydrothermal method, and mixes titanium dioxide powder with carbon quantum dot solution to obtain a composite photocatalyst. The degradation rate of the composite material to methylene blue is relatively low. High; patent CN104877677A synthesizes a multifunctional mesoporous silica / carbon quantum dot nanocomposite material with ordered mesoporous structure and fluorescent properties; in the prior art, the compounds containing carbon quantum dots are used to degrade methyl orange and methylene blue in wastewater etc., but does not degrade nitrogen oxides

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 of carbon quantum dot/zinc ferrite composite photocatalytic materials
  • Preparation method of carbon quantum dot/zinc ferrite composite photocatalytic materials
  • Preparation method of carbon quantum dot/zinc ferrite composite photocatalytic materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] a. Weigh 1.6g of ascorbic acid, add it to a mixed solution of 15mL ethylene glycol and 25mL deionized water, stir at room temperature for 30min, then react at 160°C for 70min to obtain an aqueous solution of carbon quantum dots;

[0029] b. Weigh 1.189g of Zn(NO 3 ) 2 ·6H2 O and 3.232g of Fe(NO 3 ) 3 9H 2 O, then add 20mL deionized water, stir until the solution is clear at room temperature;

[0030] c. adjust the pH value of the solution obtained in step b with a 2mol / L NaOH solution, so that the pH value reaches 13.0 to obtain a suspension;

[0031] d. Add 1 mL of the carbon quantum dot aqueous solution obtained in step a to the suspension obtained in the above step c;

[0032] e. After stirring evenly, let it stand for 1 day, then transfer it to a 100mL polytetrafluoroethylene liner, conduct a hydrothermal reaction at 100°C for 6 hours, wash it with deionized water and ethanol several times, and dry it at 70°C to obtain carbon quantum Dot / zinc ferrite composite...

Embodiment 2

[0034] a. Weigh 1.6g of ascorbic acid, add it to a mixed solution of 15mL ethylene glycol and 25mL deionized water, stir at room temperature for 30min, then react at 160°C for 70min to obtain an aqueous solution of carbon quantum dots;

[0035] b. Weigh 1.189g of Zn(NO 3 ) 2 ·6H 2 O and 3.232g of Fe(NO 3 ) 3 9H 2 O, then add 20mL deionized water, stir until the solution is clear at room temperature;

[0036] c. adjust the pH value of the solution obtained in step b with a 2mol / L NaOH solution, so that the pH value reaches 13.0 to obtain a suspension;

[0037] d. Add 3 mL of the carbon quantum dot aqueous solution obtained in step a to the suspension obtained in the above step c;

[0038] e. Stir for a period of time to mix evenly, then let it stand for 1 day, then transfer it to a 100mL polytetrafluoroethylene liner, conduct a hydrothermal reaction at 100°C for 6 hours, wash it with deionized water and ethanol for several times, and dry it at 70°C. A carbon quantum dot / ...

Embodiment 3

[0040] a. Weigh 1.6g of ascorbic acid, add it to a mixed solution of 15mL ethylene glycol and 25mL deionized water, stir at room temperature for 30min, then react at 160°C for 70min to obtain an aqueous solution of carbon quantum dots;

[0041] b. Weigh 1.189g of Zn(NO 3 ) 2 ·6H 2 O and 3.232g of Fe(NO 3 ) 3 9H 2 O, then add 20mL deionized water, stir until the solution is clear at room temperature;

[0042] c. adjust the pH value of the solution obtained in step b with a 2mol / L NaOH solution, so that the pH value reaches 13.0 to obtain a suspension;

[0043] d. Add 5 mL of step a obtained carbon quantum dot aqueous solution to the suspension obtained in the above step c;

[0044] e. Stir for a period of time to make the mixture even and let it stand for 1 day, then transfer it to a 100mL polytetrafluoroethylene liner, conduct a hydrothermal reaction at 100°C for 6 hours, wash it with deionized water and ethanol several times, and dry it at 70°C , to obtain carbon quant...

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

PropertyMeasurementUnit
Average particle sizeaaaaaaaaaa
Login to View More

Abstract

Provided is a preparation method of carbon quantum dot / zinc ferrite composite photocatalytic materials. Ascorbic acid is added into a mixed solution of ethylene glycol and deionized water and evenly stirred, reaction is performed for 1-5 h at the temperature of 100-200 DEG C, and a carbon quantum dot aqueous solution is obtained; zinc salt and Fe(NO3)3.9H2O are added into water, a pH value is adjusted to be 8-14 after dissolution, and suspension liquid is obtained; the carbon quantum dot aqueous solution is added into the suspension liquid, standing is performed after uniform stirring, hydrothermal reaction is performed for 4-10 h at the temperature of 80-180 DEG C, washing and drying are performed, and the carbon quantum dot / zinc ferrite composite photocatalytic materials are obtained. The raw materials are low in price, easy to obtain, the photocatalytic materials are low in synthesis cost, the method is easy to implement, and carbon quantum dot / zinc ferrite has higher degradation efficiency on NOx compared with pure zinc ferrite within the range of visible light.

Description

technical field [0001] The technical field of photocatalysis of the present invention particularly relates to a method for preparing a carbon quantum dot / zinc ferrite composite photocatalytic material. Background technique [0002] Nitrogen oxides (NO x ) as common air pollutants, including NO and NO 2 , is the greenhouse effect, acid rain, ozone hole, photochemical smog and PM 2.5 It is one of the main pollutants in the world, which is extremely harmful to the environment and will directly or indirectly cause harm to human health. At present, flue gas denitrification technology is mainly used in industry to achieve NO x emission standards. but NO x The concentration is relatively low in the air and cannot be effectively removed by traditional methods. The long-term accumulation of nitrogen oxides in the air will affect the air quality of human living environment, so it is urgent to effectively deal with this pollutant. The study found that the photocatalytic redox re...

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): B01J23/80B82Y30/00B01D53/86B01D53/56
CPCB01D53/8628B82Y30/00B01J23/80B01D2258/06B01J35/19B01J35/39Y02C20/10
Inventor 黄宇梁艳玲张朋曹军骥
Owner INST OF EARTH ENVIRONMENT CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com