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

Preparation method of double-crystal-form TiO2 photocatalytic material modified on G (graphene)

A photocatalytic material, graphene technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve problems such as no titanium dioxide nanocrystals, achieve excellent photocatalytic performance, stable physical and chemical Performance, the effect of improving photocatalytic activity

Inactive Publication Date: 2015-12-16
NANCHANG HANGKONG UNIVERSITY
View PDF6 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Recently, twin-crystal anatase-brookite TiO 2 However, there is no report on anatase / brookite titanium dioxide nanocrystals modified on graphene G

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
  • Preparation method of double-crystal-form TiO2 photocatalytic material modified on G (graphene)
  • Preparation method of double-crystal-form TiO2 photocatalytic material modified on G (graphene)

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) Weigh 0.6g of urea and dissolve it in water, then add 10ml of ammonium dihydroxylactate titanate, then transfer the mixed solution to a volumetric flask and dilute it to 100ml with water. At this time, the mixed solution of urea after constant volume The concentration in is 0.1M;

[0019] (2) Weigh 20 mg of graphene oxide and place it in a beaker, pour 100 ml of the mixed solution obtained in step (1) into the beaker containing graphene oxide, seal the beaker with plastic wrap, and ultrasonicate for 8 hours. The ultrasonic power is 200w to ensure that graphene oxide is dispersed and fully in contact with dihydroxylactate ammonium titanate;

[0020] (3) After ultrasonic treatment, transfer the mixed solution obtained in step (2) to a 250ml polytetrafluoroethylene-lined stainless steel autoclave, seal it and place it in an electric furnace, and react at 160°C for 24h;

[0021] (4) After the reaction in step (3), let the polytetrafluoroethylene-lined stainless steel a...

Embodiment 2

[0024] The amount of urea added in step (1) is 1.5g, and the concentration of urea in the mixed solution after constant volume is 0.25M. Steps (2), (3) and (4) are the same as in Example 1.

[0025] The resulting product is TiO 2 A90B10 / G, take 50mg of this product and use it to degrade 50ml of 10PPm methyl orange solution under simulated sunlight. After 120min, the degradation rate reaches 80.07%.

Embodiment 3

[0027] The amount of urea added in step (1) is 3.0 g, and the concentration of urea in the mixed solution after constant volume is 0.5M. Steps (2), (3) and (4) are the same as in Example 1.

[0028] The resulting product is TiO 2 A75B25 / G, take 50mg of this product and use it to degrade 50ml of 10PPm methyl orange solution under simulated sunlight. After 120min, the degradation rate reaches 94.82%.

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 provides a preparation method of a double-crystal-form TiO2 photocatalytic material modified on G (graphene). Firstly, TALH, GO (graphene oxide) and urea are taken as raw materials, and single-crystal anatase TiO2 / G, double-crystal anatase-brookite TiO2 / G and single-crystal brookite TiO2 / G are prepared with a hydrothermal synthesis method. During experiments, the phase composition of the double-crystal anatase-brookite TiO2 / G is controlled through adjustment of the concentration of the urea in a TALH solution. The photocatalytic activity of a synthesized double-crystal anatase-brookite TiO2 / G composite material is tested through degradation of a methyl orange solution. The composite material belongs to an inorganic photocatalytic material, is stable in performance, higher in photocatalytic activity and resistant to chemical corrosion and photocorrosion and has important significance in aspects of water photolysis, sterilization, preparation of solar sensitized batteries, environmental protection and the like.

Description

technical field [0001] The invention belongs to the field of preparation of photocatalytic composite materials, in particular to a twin-crystal TiO modified on graphene G 2 Preparation methods of photocatalytic materials. Background technique [0002] Titanium dioxide is widely used to photolyze water, sterilize and prepare solar sensitized cells, etc. Especially in environmental protection, titanium dioxide as a photocatalyst has shown broad application prospects. Anatase, brookite, and rutile are three naturally occurring polymorphs of titanium dioxide. Among these three polymorphs, anatase has been proven to be the most active, but it can only absorb ultraviolet light , the utilization rate of solar energy is very low; the activity of rutile is low, and brookite has rarely been studied in catalysis, because it has metastability, so it was very difficult to synthesize pure phase brookite in the past. Commercially available anatase-rutile titanium dioxide P25 was demonstr...

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 Applications(China)
IPC IPC(8): B01J21/18
Inventor 谢宇周盼盼胡冬生郭若彬凌云
Owner NANCHANG HANGKONG UNIVERSITY
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