Ag@Ag2O microcrystals of photocatalytic material with specific patterns and high surface activity and preparation method thereof

A photocatalytic material and composite photocatalytic technology, which is applied in the field of visible light-responsive micro-nano photocatalytic powder material synthesis, and can solve the problems of high photogenerated carrier recombination rate, low photocatalytic efficiency, and lack of controllable morphology photocatalytic ability. , to achieve the effect of simple preparation method and low cost

Inactive Publication Date: 2012-12-26
SHANDONG UNIV
View PDF0 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the silver oxide photocatalyst obtained by the traditional method not only has low photocatalytic efficiency and high

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
  • Ag@Ag2O microcrystals of photocatalytic material with specific patterns and high surface activity and preparation method thereof
  • Ag@Ag2O microcrystals of photocatalytic material with specific patterns and high surface activity and preparation method thereof
  • Ag@Ag2O microcrystals of photocatalytic material with specific patterns and high surface activity and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Add 5ml of 0.01M ammonium nitrate solution to 2.5ml of 0.01M silver nitrate solution, stir for 10 minutes, then add 0.25ml of 2M sodium hydroxide solution, and continue stirring for 10 minutes. The obtained sample was centrifuged with a centrifuge at 5000 rpm, and the obtained dark brown precipitate was washed 3 times with deionized water and ethanol. Dry at 60 for 12 hours; get cubic Ag 2 O, the side length of the cube is 0.5 μm. figure 1 SEM images of the obtained samples. Take 0.2 g of the obtained sample, add it to 100 ml of 20 mg / L methyl orange solution, and irradiate it under visible light for 10 minutes to obtain a black sample, filter it with suction, wash it three times with deionized water and ethanol, and dry it at 60°C for 12 Hour. This gives the cubic AgAg 2 O structure photocatalytic material, the size of the deposited silver is between 20-30nm. Take the cube AgAg 2 O sample 0.1g, add in the 20mg / L methyl orange solution of 100ml, irradiate under vi...

Embodiment 2

[0050] Add 5ml of 0.03M ammonium acetate solution to 2.5ml of 0.03M silver nitrate solution, stir for 10 minutes, then add 0.25ml of 2M sodium hydroxide solution, and continue stirring for 10 minutes. The obtained samples were centrifuged at 5000 rpm and washed 3 times with deionized water and ethanol. Dry at 60°C for 12 hours. Ag of the obtained rhombohedral dodecahedron 2 O. The rhombic dodecahedron has a size of 0.7 μm. figure 2 SEM images of the obtained samples. Take 0.2 g of the obtained sample, add it to 100 ml of 20 mg / L methyl orange solution, and irradiate it under visible light for 10 minutes to obtain a test sample, filter it with suction, wash it three times with deionized water and ethanol, and dry it at 60°C 12 hours. This gives the rhombohedral AgAg 2 O structure photocatalytic material, the size of the deposited silver is between 20-30nm. Rhombic dodecahedral AgAg 2 O sample 0.1g, add in the 20mg / L methyl orange solution of 100ml, irradiate under visi...

Embodiment 3

[0052] Add 5ml of 0.5M ammonia solution to 2.5ml of 0.5M silver nitrate solution, stir for 10 minutes, then add 0.25ml of 2M sodium hydroxide solution, and continue stirring for 10 minutes. The obtained samples were centrifuged at 5000 rpm and washed 3 times with deionized water and ethanol. Dry at 60°C for 12 hours. The obtained octahedral Ag 2 O. The size of the octahedron is 2 μm. image 3 SEM images of the obtained samples. Take 0.2 g of the obtained sample, add it to 100 ml of 20 mg / L methyl orange solution, and irradiate it under visible light for 10 minutes to obtain a test sample, filter it with suction, wash it three times with deionized water and ethanol, and dry it at 60°C 12 hours. This gives the octahedral AgAg 2 O structure photocatalytic material, the size of the deposited silver is between 20-30nm. Take octahedral AgAg 2 O sample 0.1g, add in the 20mg / L methyl orange solution of 100ml, irradiate under visible light, measure its degradation efficiency wi...

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 relates to Ag@Ag2O microcrystals of a photocatalytic material with specific patterns and high surface activity and a preparation method thereof. The Ag@Ag2O microcrystals of the photocatalytic material are made of a compound photocatalytic material with the corresponding patterns formed by depositing silver nano particles at the surfaces of silver oxide particles with different patterns. The Ag@Ag2O microcrystals of the photocatalytic material with the specific patterns and high surface activity and the preparation method thereof are characterized in that silver oxide is in a cubic crystal system, the particle size is 0.5 to 2.0mum, and the particle size of the silver nano particles deposited at the surfaces is 20 to 30nm; and the silver oxide particles have one of the 5 following patterns: a cubic block, a rhombohedral dodecahedron, an octahedron, a 18-faced body or a 26-faced body. The invention also provides a preparation method of Ag@Ag2O. By exposing the crystal face of Ag2O, which has different surface energy, and loading silver deposited at the surface of the Ag2O, the Ag@Ag2O photocatalytic material disclosed by the invention has high surface activity, the preparation method is simple, the reaction condition is mild, the operation is convenient, and the energy consumption is little.

Description

technical field [0001] The invention relates to a photocatalytic material AgAg with a specific shape and high surface activity 2 The invention discloses an O microcrystal and a preparation method thereof, belonging to the field of synthesis of visible light-responsive micro-nano photocatalytic powder materials. Background technique [0002] In recent years, energy and environmental issues have become increasingly prominent, which has seriously affected economic development. Environmental pollution has brought great harm to human production and life, especially the pollution of water resources has endangered human health, and there is an urgent need for feasible methods to treat sewage. The traditional method of water pollution control has the disadvantages of high energy consumption, complicated equipment, high cost, and easy to cause secondary pollution. Therefore, the development of a new, efficient and practical environmental protection treatment technology has become a...

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): B01J23/50B01J35/00C02F1/30
CPCY02W10/37
Inventor 展杰黄柏标王刚
Owner SHANDONG UNIV
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