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

A kind of gold nanoparticle/titanium dioxide nanoflower composite material and its preparation method and application

A technology of gold nanoparticles and titanium dioxide, which is applied in the field of nanomaterials and photocatalysis, can solve the problems of narrow light absorption range and severe recombination, and achieve the effects of simple preparation process, low production cost and excellent photocatalytic hydrogen production performance

Active Publication Date: 2020-04-24
ZHEJIANG UNIV CITY COLLEGE
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to address the above problems, to provide a method for preparing a new type of composite material by using titanium dioxide oxygen vacancies with reductive one-step deposition of gold nanoparticles, which solves the serious internal recombination of titanium dioxide photogenerated carriers and the narrow light absorption range in the prior art And other issues

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
  • A kind of gold nanoparticle/titanium dioxide nanoflower composite material and its preparation method and application
  • A kind of gold nanoparticle/titanium dioxide nanoflower composite material and its preparation method and application
  • A kind of gold nanoparticle/titanium dioxide nanoflower composite material and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Step 1: Add 0.025 mL of diethylenetriamine (EDTA) to 31.5 mL of isopropanol, and stir for 10 min. Then, 1.125 mL of diisopropyl di(acetylacetonato)titanate was added to the solution. Stirring was continued for 10 min. The resulting mixed solution was poured into a reaction kettle, and subjected to solvent heat treatment at 200° C. for 24 hours. After the reaction, the precipitate was washed three times with deionized water and absolute ethanol respectively, placed in an oven at 60°C, and dried for 24 hours. Finally, the reactant was placed in a muffle furnace with a heating rate of 1°C / min and a temperature of 425°C. Annealed for 2 hours to obtain the precursor titania nanoflower material.

[0020] Step 2: Take 100 mg of the precursor titanium dioxide nanoflowers and add it to 50 mL of deionized water, and add 0.21 mL of chloroauric acid solution containing 2.1 mg of chloroauric acid. Keep the temperature of the solution water bath at 80° C., and the reaction time is...

Embodiment 2

[0025] Step 1: Add 0.025 mL of diethylenetriamine (EDTA) to 31.5 mL of isopropanol, and stir for 10 min. Then, 1.125 mL of diisopropyl di(acetylacetonato)titanate was added to the solution. Stirring was continued for 10 min. The resulting mixed solution was poured into a reaction kettle, and subjected to solvent heat treatment at 200° C. for 24 hours. After the reaction, the precipitate was washed three times with deionized water and absolute ethanol, placed in an oven at 60°C, dried for 24 hours, and finally placed in a muffle furnace with a heating rate of 1°C / min and annealed at 425°C After 2 hours, the precursor titania nanoflower material was obtained.

[0026] Step 2: Take 100 mg of the precursor titanium dioxide nanoflowers and add it to 50 mL of deionized water, and add 0.42 mL of chloroauric acid solution containing 4.2 mg of chloroauric acid. Keep the temperature of the solution water bath at 100° C., and the reaction time is 5 hours. After the reaction, the prec...

Embodiment 3

[0030] Step 1: Add 0.125 mL of diethylenetriamine (EDTA) to 31.5 mL of isopropanol, and stir for 10 min. Then, 4.5 mL of diisopropyl di(acetylacetonato)titanate was added to the solution. Stirring was continued for 10 min. The resulting mixed solution was poured into a reaction kettle, and subjected to solvent heat treatment at 220° C. for 36 hours. After the reaction, the precipitate was washed three times with deionized water and absolute ethanol, placed in an oven at 60°C, dried for 24 hours, and finally placed in a muffle furnace with a heating rate of 10°C / min and annealed at 425°C After 2 hours, the precursor titania nanoflower material was obtained.

[0031] Step 2: Take 100 mg of the precursor titanium dioxide nanoflowers and add it to 50 mL of deionized water, and add 0.21 mL of chloroauric acid solution containing 2.1 mg of chloroauric acid. Keep the temperature of the solution water bath at 80° C., and the reaction time is 2 hours. After the reaction, the precip...

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
thicknessaaaaaaaaaa
sizeaaaaaaaaaa
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for preparing a gold nanoparticle / titanium dioxide nanoflower composite material. The gold nanoparticle / titanium dioxide nanoflower composite material prepared by the invention is composed of titanium dioxide nanoflowers and gold nanoparticles, in which the titanium dioxide nanoflowers provide large Specific surface area and rich in oxygen vacancies. Gold nanoparticles are uniformly deposited on the surface of titanium dioxide, forming a close contact interface between the two. The gold nanoparticle / titanium dioxide nanoflower composite material of the present invention is an efficient and stable photoelectric conversion material. It is prepared by a one-step simple reduction method. The preparation process is simple, the reaction conditions are easy to control, and it is suitable for large-scale preparation and industrial production.

Description

technical field [0001] The invention relates to a method and application for preparing a gold nanoparticle / titanium dioxide nanoflower composite material by depositing gold nanoparticles on the surface of titanium dioxide nanoflowers, and belongs to the technical field of nanomaterials and photocatalysis. Background technique [0002] In the 21st century, the two major challenges that mankind will face in the course of sustainable development are energy issues and environmental issues. Solar energy has the advantages of being clean, cheap, and renewable. How to efficiently utilize solar energy will be one of the main means to solve energy problems. The photocatalytic hydrogen production technology is based on the chemical conversion and storage of solar energy, and realizes the high-efficiency photolysis of water to produce hydrogen through the excitation of semiconductors by solar energy. Semiconductor photocatalysts such as titanium dioxide, zinc oxide, etc. have attracte...

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): B01J23/52C01B3/04C01B13/02
CPCC01B3/042C01B13/0207B01J23/52B01J35/39Y02E60/36
Inventor 胡海华曹小华
Owner ZHEJIANG UNIV CITY COLLEGE
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