Method for preparing composite heterostructure of zinc oxide nano rods and silver micron plate

A zinc oxide nanorod, heterostructure technology, applied in chemical instruments and methods, single crystal growth, polycrystalline material growth, etc., can solve unfavorable electron and hole acceptor penetration and adsorption, narrow light absorption range, catalytic Reduce the activity and other problems, and achieve the effects of controllable preparation method, broadened absorption spectrum, and stable product properties.

Inactive Publication Date: 2013-08-14
TONGJI UNIV
View PDF3 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Most of the noble metal-zinc oxide composite materials prepared at present are (a) the noble metal is deposited in situ on the surface of the semiconductor material or (b) dispersed in the semiconductor material, these simple composite structures will have some disadvantages
The first is that the composite material has a narrow range of light absorption: the previously reported noble metal-semiconductor composite materials respond to light mainly in the ultraviolet (<400nm) and part of the visible light region (500-700nm), and the response to infrared light is very limited. (700-2500nm), which will directly affect the ability o

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
  • Method for preparing composite heterostructure of zinc oxide nano rods and silver micron plate
  • Method for preparing composite heterostructure of zinc oxide nano rods and silver micron plate
  • Method for preparing composite heterostructure of zinc oxide nano rods and silver micron plate

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0027] Example 1

[0028] Weigh 0.1 g of sodium dextran sulfate (molecular weight 40000) and dissolve it into the mixed solution of water and formamide, and then mix with equimolar concentration (0.2 mol / L) of 0.1 ml of ascorbic acid and 0.1 ml of silver nitrate under stirring. Add to the mixed solution and let stand at room temperature for 24 hours to prepare a silver microplate product with holes. The product was centrifuged, washed with water, dried, and immersed in a 0.1 g / L polyvinylpyrrolidone (PVP, molecular weight 12000) aqueous solution for 4 hours, so that the PVP was adsorbed on the silver plate. At the same time, another 125 ml of 10 mmol / L zinc acetate ethanol solution was taken, 65 ml of 30 mmol / L potassium hydroxide ethanol solution was added dropwise to the above solution, and stirring was continued for 2 hours at 60°C. The zinc oxide seed crystal solution was prepared. Then disperse the PVP-treated silver microplate into the above-mentioned zinc oxide seed crys...

Example Embodiment

[0029] Example 2

[0030] Weigh 0.1 g of sodium dextran sulfate (molecular weight 40000) and dissolve it into the mixed solution of water and formamide, and then mix with equimolar concentration (0.2 mol / L) of 0.1 ml of ascorbic acid and 0.1 ml of silver nitrate under stirring. Add to the mixed solution and let stand at room temperature for 24 hours to prepare a silver microplate product with holes. The product was centrifuged, washed with water, dried, and immersed in a 0.1 g / L polyvinylpyrrolidone (PVP, molecular weight 12000) aqueous solution for 4 hours, so that the PVP was adsorbed on the silver plate. At the same time, another 125 ml of 10 mmol / L zinc acetate ethanol solution was taken, 65 ml of 30 mmol / L potassium hydroxide ethanol solution was added dropwise to the above solution, and stirring was continued for 2 hours at 60°C. The zinc oxide seed crystal solution was prepared. Then disperse the PVP-treated silver microplate into the above-mentioned zinc oxide seed crys...

Example Embodiment

[0031] Example 3

[0032] Weigh 0.1 g of sodium dextran sulfate (molecular weight 40000) and dissolve it into the mixed solution of water and formamide, and then mix with equimolar concentration (0.2 mol / L) of 0.1 ml of ascorbic acid and 0.1 ml of silver nitrate under stirring. Add to the mixed solution and let stand at room temperature for 24 hours to prepare a silver microplate product with holes. The product was centrifuged, washed with water, dried, and immersed in a 0.1 g / L polyvinylpyrrolidone (PVP, molecular weight 12000) aqueous solution for 4 hours, so that the PVP was adsorbed on the silver plate. At the same time, another 125 ml of 10 mmol / L zinc acetate ethanol solution was taken, 65 ml of 30 mmol / L potassium hydroxide ethanol solution was added dropwise to the above solution, and stirring was continued for 2 hours at 60°C. The zinc oxide seed crystal solution was prepared. Then disperse the PVP-treated silver microplate into the above-mentioned zinc oxide seed crys...

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
Diameteraaaaaaaaaa
Diameteraaaaaaaaaa
Diameteraaaaaaaaaa
Login to view more

Abstract

The invention relates to a method for preparing a composite heterostructure of zinc oxide nano rods and a silver micron plate. The method includes: utilizing dextran sulphate sodium as regulating agent to prepare a perforated silver micron plate in a reaction system of silver nitrate and an ascorbic acid solution of water and methanamide; depositing zinc oxide seed crystals on the silver micron plate, coating the silver micron plate with the deposition of the zinc oxide seed crystals on an electric-conducting glass sheet in a rotating manner, cleaning, drying, placing the electric-conducting glass sheet in an ethanol solution of hexamethylene tetramine and zinc nitrate to grow a zinc oxide nano rod array on the silver micron plate, fully cleaning with water, and naturally drying to obtain the finished product. The product prepared by the method is a high-level composite heterostructure with the zinc oxide nano rod array growing on the perforated silver micron plate, wherein the diameter of the silver micron plate is about 4 microns, and the size and the structure of the zinc oxide nano rod array are adjustable and controller. The method for preparing the composite heterostructure of the zinc oxide nano rods and the silver micron plate is structurally controllable, good in repeatability and stable in product property, and has excellent photocatalytic performance.

Description

technical field [0001] The invention relates to a method for preparing a structure-controllable semiconductor-metal novel composite material, in particular to a method for preparing an advanced composite heterostructure of zinc oxide nanorods-silver microdisks. Background technique [0002] Nanocomposites with heterogeneous structures can obtain novel physical and chemical properties and multifunctional properties that single materials do not have, so they have broad application prospects in many fields "Synthesis of Branched'nanotrees'by Controlled Seeding of Multiple Branching Events"[ Dick, K.A.; Deppert, K.; Larsson, M.W.; Martensson, T.; Seifert, W.; Wallenberg, L.R.; Samuelson, L. Nat. Mater.3, 380-384. (2004)]. Among them, metal-semiconductor heterojunction composites have unique optical, electrical, and magnetic properties. Taking noble metals (such as Ag) and wide-gap oxide semiconductors (ZnO) as examples, due to the unique surface plasmon resonance effect (Surfac...

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): B22F9/24C30B29/16C30B29/62C30B7/14
Inventor 杨金虎秦瑶李影金超李杰时东陆
Owner TONGJI 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