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

Three-dimensional sheet TiO2 material and preparation method and application thereof

A three-dimensional, sheet-like structure technology, applied in chemical instruments and methods, titanium oxide/hydroxide, physical/chemical process catalysts, etc., can solve problems such as easy danger, severe hydrolysis, and difficulty in obtaining three-dimensional complex structures, and achieve The effect of novel shape, simple process and mild reaction conditions

Active Publication Date: 2014-02-12
THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
View PDF2 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The preparation of titanium oxide by hydrothermal experiment often uses titanium tetrachloride or tetrabutyl titanate as the raw material. The chemical properties of the above-mentioned substances are active, the hydrolysis is severe, and it is easy to cause danger.
Some researchers also use titanium oxide powder as a raw material to prepare nano-titanium oxide, but the morphology of titanium oxide obtained in this way is relatively simple, mainly composed of one-dimensional nanowires and nanotubes, and it is difficult to obtain three-dimensional complex structures.

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
  • Three-dimensional sheet TiO2 material and preparation method and application thereof
  • Three-dimensional sheet TiO2 material and preparation method and application thereof
  • Three-dimensional sheet TiO2 material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Put 0.1g of metallic Ti powder into 150mL of a mixed solution of hydrogen peroxide and nitric acid, wherein the concentration of hydrogen peroxide is 9M, and the concentration of nitric acid is 0.1M; then condense and reflux in an oil bath at 80°C for 2 hours to obtain an orange color solution;

[0033] (2) Measure 18mL of the orange-yellow solution prepared in step (1), mix it with 42mL of 10M NaOH solution in a PTFE liner with a volume of 100mL and stir for 25min, then hydrothermally react at 180°C for 5h;

[0034] (3) After the reaction, the precipitate was separated by centrifugation, washed with 0.1M nitric acid and deionized water until the pH value was 7; then dried in an oven at 80°C to obtain a three-dimensional flaky TiO 2 Material.

[0035] figure 1 , figure 2 The three-dimensional flaky TiO that this embodiment makes 2 The scanning electron microscope images of the material at different magnifications. It can be seen from the figure that the three-d...

Embodiment 2

[0039] (1) Put 0.1g of metallic Ti powder into 150mL of a mixed solution of hydrogen peroxide and nitric acid, wherein the concentration of hydrogen peroxide is 9M, and the concentration of nitric acid is 0.1M; then condense and reflux in an oil bath at 80°C for 3 hours to obtain an orange color solution;

[0040] (2) Measure 9mL of the orange-yellow solution prepared in step (1), mix it with 21mL of 10M NaOH solution in a PTFE liner with a volume of 100ml and stir for 10min, and then carry out at a temperature of 200°C. Hydrothermal reaction, time is 5h;

[0041] (3) After the reaction is completed, the product is centrifuged and washed with 0.1M nitric acid and deionized water until the pH value of the product obtained in step (2) is 7; then dried in an oven at 80°C to obtain a three-dimensional sheet TiO 2 Material.

[0042] Figure 5 , Figure 6 The three-dimensional flaky TiO that this embodiment makes 2 The scanning electron microscope images of the material at diffe...

Embodiment 3

[0045] (1) Put 0.05g of metallic Ti powder into 100mL of a mixed solution of hydrogen peroxide and nitric acid, wherein the concentration of hydrogen peroxide is 9.5M, and the concentration of nitric acid is 0.2M; then condense and reflux in an oil bath at 90°C for 2 hours to obtain orange yellow solution;

[0046] (2) Measure 18 mL of the orange solution prepared in step (1), mix it with 22 mL of 9M NaOH solution in a PTFE liner with a volume of 100 mL, and stir for 20 min, then hydrothermally react at 190°C for 6 h;

[0047] (3) After the reaction, the precipitate was separated by centrifugation, washed with 0.1M nitric acid and deionized water until the pH value was 7; then dried in an oven at 80°C to obtain a three-dimensional flaky TiO 2 Material.

[0048] Figure 8 The three-dimensional flaky TiO that this embodiment makes 2 The scanning electron microscope picture of the material shows that the side length of the sheet-like structure of the sheet-like material is 7 μ...

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
Lengthaaaaaaaaaa
Specific surface areaaaaaaaaaaa
Login to View More

Abstract

The invention provides a TiO2 material with a three-dimensional structure and a preparation method and application thereof. The TiO2 material comprises a three-dimensional sheet structure formed by the parallel growth of nanowires; the area equivalent diameter of the three-dimensional sheet structure is 2-8 microns, and the thickness is 1-3 microns; the diameter of each nanowire is 20-50nm, and the length of each nanowire is 1-2 microns. The preparation method of the three-dimensional sheet TiO2 material comprises the following steps of dissolving metal Ti powder in a mixed solution of H2O2 / HNO3, and performing a hydrothermal reaction with sodium hydroxide at certain temperature; after the reaction, performing centrifugal separation and washing until the pH value of the solution is 7; drying in an oven. The three-dimensional sheet TiO2 material provided by the invention has higher adsorption property and photocatalysis property than Degussa P25 nano TiO2 in degrading methylene blue dyes.

Description

technical field [0001] The invention relates to a three-dimensional flake TiO 2 Materials and their preparation methods and uses, especially a three-dimensional sheet-like TiO composed of nanowires grown in parallel 2 Materials and their methods of preparation and uses. Background technique [0002] Titanium oxide has the advantages of high photocatalytic activity, environmental friendliness, and low cost. It is the most concerned high-efficiency photocatalyst. , metallurgy and other fields. [0003] The three-dimensional micro-nano hierarchical structure has the advantages of both micro- and nano-structures, which suppresses the shortcomings of each structure, and has become a hot spot in the field of material research. Three-dimensional micro-nano TiO 2 The material has high specific surface area, good light absorption and refractive index. The high specific surface area is conducive to the generation and migration of photogenerated carriers and the adsorption of reac...

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): C01G23/047C01G23/053B01J21/06
Inventor 朴玲钰杜利霞江潮吴志娇吴谦
Owner THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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