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

A kind of preparation method of zinc oxide/silver oxide composite photocatalyst and application thereof

A technology of zinc oxide and silver oxide, which is applied in the direction of metal/metal oxide/metal hydroxide catalyst, catalyst activation/preparation, physical/chemical process catalyst, etc. Small specific surface area and other issues, to achieve the effect of increasing contact area, increasing reactive sites, and large specific surface area

Active Publication Date: 2021-06-25
FUJIAN AGRI & FORESTRY UNIV
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Now researchers have prepared ZnO with various morphological structures, such as hexagonal rod-like structure, snowflake-like structure, and silver needle-like linear structure, but ZnO with these morphologies often have a small specific surface area, which affects the photocatalytic properties of ZnO. efficiency, and cannot provide many active reaction sites for photocatalytic reactions
In addition, the band gap of zinc oxide is relatively large, and most photocatalytic reactions can only be carried out under ultraviolet light.

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] (1) Preparation of porous sponge-like ZnO: Weigh 2.7g of zinc nitrate hexahydrate and dissolve it in 20mL of deionized water, add 2.54g of hexamethylenetetramine and 0.32g of oxalic acid dihydrate dropwise (1 drop / second). 30mL aqueous solution, and magnetically stirred to make it fully dissolved; the mixed solution was condensed and refluxed in an oil bath at 80°C for 4 hours to obtain a white precipitate, which was washed with deionized water several times, and then placed in a vacuum drying oven at 50 After drying at ℃ for 24 hours, zinc oxide is obtained; then the obtained zinc oxide is placed in a muffle furnace, and calcined at 300 ℃ for 4 hours in an air atmosphere to obtain a porous sponge-like ZnO product;

[0016] (2) Ag 2 Preparation of O nanoparticles: Weigh 1.7g AgNO 3 and 0.1g PEG-8000 were added to 100mL deionized water in turn, stirred by magnetic force for 10 min, and NaOH solution with a concentration of 0.1mol / L was slowly added dropwise to make the ...

Embodiment 2

[0020](1) Preparation of porous sponge-like ZnO: Weigh 2.7g of zinc nitrate hexahydrate and dissolve it in 20mL of deionized water, add 5.09g of hexamethylenetetramine and 0.3g of oxalic acid dihydrate dropwise (1 drop / second). 30mL aqueous solution, and magnetically stirred to make it fully dissolved; the mixed solution was condensed and refluxed in an oil bath at 90°C for 4 hours to obtain a white precipitate, which was washed with deionized water several times, and then placed in a vacuum drying oven at 50 After drying at ℃ for 24 hours, zinc oxide is obtained; then the obtained zinc oxide is placed in a muffle furnace, and calcined at 400 ℃ for 4 hours in an air atmosphere to obtain a porous sponge-like ZnO product;

[0021] (2) Ag 2 Preparation of O nanoparticles: Weigh 1.7g AgNO 3 and 0.1g PEG-8000 were added to 100mL deionized water in sequence, stirred by magnetic force for 10 min, and NaOH solution with a concentration of 0.1mol / L was slowly added dropwise to make th...

Embodiment 3

[0025] (1) Preparation of porous sponge-like ZnO: Weigh 2.7g of zinc nitrate hexahydrate and dissolve it in 20mL of deionized water, add 5.09g of hexamethylenetetramine and 0.572g of oxalic acid dihydrate 30mL aqueous solution, and magnetically stirred to make it fully dissolved; the mixed solution was condensed and refluxed in an oil bath at 90°C for 4 hours to obtain a white precipitate, which was washed with deionized water several times, and then placed in a vacuum drying oven at 50 After drying at ℃ for 24 hours, zinc oxide is obtained; then the obtained zinc oxide is placed in a muffle furnace, and calcined at 400 ℃ for 4 hours in an air atmosphere to obtain a porous sponge-like ZnO product;

[0026] (2) Ag 2 Preparation of O nanoparticles: Weigh 1.7g AgNO 3 and 0.1g PEG-8000 were added to 100mL deionized water in sequence, stirred by magnetic force for 10 min, and NaOH solution with a concentration of 0.1mol / L was slowly added dropwise to make the pH = 13, then the dro...

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 discloses a preparation method and application of a zinc oxide / silver oxide composite photocatalyst. Firstly, a zinc-based precursor is prepared by a liquid-phase co-precipitation method, and a porous spongy zinc oxide is prepared by high-temperature calcination, and then silver nitrate is used as a precursor. Then add sodium hydroxide to react under alkaline environment conditions of pH = 13, and dry to obtain silver oxide nanoparticles. Further, the obtained porous spongy zinc oxide and silver oxide nanoparticles are subjected to magnetic stirring under alkaline conditions, etc. Through the physical mixing process, a composite photocatalyst with silver oxide nanoparticles loaded on the surface of zinc oxide is obtained. ZnO / Ag prepared by the present invention 2 O composite material has the advantages of large specific surface area and high photocatalytic reaction active sites, and can be used for photocatalytic degradation of formaldehyde liquid under visible light.

Description

technical field [0001] The invention belongs to the field of catalysts, and in particular relates to a preparation method and application of a zinc oxide / silver oxide composite photocatalyst. Background technique [0002] In recent years, formaldehyde, as a major chemical raw material, has been widely used in various industries, such as printing, pesticides, building materials and other fields. Factories producing these products will discharge a large amount of untreated industrial wastewater into sewers, lakes and rivers, etc. , Formaldehyde dissolved in water also flows into it, directly causing serious harm to aquaculture, human domestic water and agricultural irrigation, not only seriously affecting human health, but also posing a great threat to the ecological environment. Traditional methods for removing formaldehyde include physical adsorption, biological purification, membrane separation technology, etc., but these methods only temporarily adsorb formaldehyde, do not...

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
Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/66B01J35/02B01J35/10B01J37/03B01J37/04B01J37/08C02F1/30C02F101/34
CPCB01J23/06B01J23/50B01J23/66B01J35/0006B01J35/004B01J35/023B01J35/10B01J37/03B01J37/04B01J37/088C02F1/30C02F2101/34C02F2305/10
Inventor 黄六莲肖禾陈礼辉马晓娟林珊刘胜楠
Owner FUJIAN AGRI & FORESTRY UNIV
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