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

Micro/nano hierarchical titanium dioxide microspheres as well as preparation method and application thereof

A titanium dioxide, hierarchical structure technology, applied in the direction of titanium dioxide, chemical instruments and methods, titanium oxide/hydroxide, etc., can solve the problems of complex synthesis steps, affecting production efficiency, long reaction time, etc., to achieve shortened reaction time, good classification Simple structure and preparation process

Active Publication Date: 2014-05-07
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
View PDF4 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, it has been reported that TiO with different morphologies and micro / nano hierarchical structures 2 However, these methods are generally based on the template method, the synthesis steps are complicated, and subsequent processing is required, or the reaction time is very long, which greatly affects the production efficiency

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
  • Micro/nano hierarchical titanium dioxide microspheres as well as preparation method and application thereof
  • Micro/nano hierarchical titanium dioxide microspheres as well as preparation method and application thereof
  • Micro/nano hierarchical titanium dioxide microspheres as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The synthesis of titanium dioxide microspheres with micro / nano hierarchical structure composed of nanoparticles (referred to as No. 1 microspheres) is completed in the following steps: first, titanium sulfate and urea are put into polytetrafluoroethylene at a molar ratio of 1:2-8 In the inner tank of the autoclave; then add deionized water until the filling degree of the inner tank is about 30-60%, and stir for 2-4 hours to obtain a uniform solution. Then put the autoclave into a microwave heating system (QWAVE 4000, 2450 MHz, maximum power 1200 W, Questron Technologies Corp), the reaction temperature is 180°C, and the holding time is 5-30min; after the reaction is completed, the autoclave is naturally cooled, and the reaction The product is repeatedly washed with deionized water and absolute ethanol until the aqueous solution is neutral, and finally the product is dried in an oven at 70°C for 2-10 hours, and the final product is titanium dioxide microspheres with a ...

Embodiment 2

[0036] Taking No.1 microsphere as an example, the research on the water treatment application of the synthetic product was carried out. As we all know, dyes and other organic pollutants exist in large quantities in industrial wastewater discharge, so the adsorption and degradation of dyes and other pollutants has very important environmental protection significance. In this experiment, the photocatalytic degradation of organic dyes was tested with No. 1 microspheres. Photocatalytic degradation of organic dyes. Specific steps are as follows:

[0037] First, choose methyl orange as the simulated organic waste water, weigh 40mg of microspheres, add it into 80ml (10-5M) methyl orange solution under dark conditions, and stir for 30min to achieve the absorption of microspheres and methyl orange solution balance. Then the mixed solution is placed under a 300W high-pressure mercury lamp for irradiation under strong stirring conditions. During the irradiation process, the mercury la...

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 discloses micro / nano hierarchical titanium dioxide microspheres composed of different nano units (nano-particles, nano-sheets and nano-rods included) as well as a preparation method and an application thereof. The hydrolysis, nucleation and crystallization processes of the titanium source titanium sulfate are mainly controlled with urea, ethylenediamine tetraacetic acid and ammonium fluoride, and then the micro / nano hierarchical titanium dioxide microspheres are obtained through a one-step rapid microwave hydrothermal reaction. The preparation method is simple in preparation process, and only comprises the steps of adding a precursor at first and then carrying out the one-step microwave hydrothermal reaction without subsequent treatment. The preparation method is short in reaction time, high in yield and prone to large-scale production. The micro / nano hierarchical titanium dioxide microspheres can be widely applied to light degradation treatment of organic pollutants.

Description

technical field [0001] The invention relates to a new preparation method of titanium dioxide with micro / nano hierarchical structure, which uses different structure-directing agents to assist microwave hydrothermal method to prepare three kinds of micro / nano units composed of different nano-units (including nano-particles, nano-sheets, and nano-rods). Hierarchical structure titanium dioxide microspheres. Background technique [0002] Due to the small size effect, surface effect, quantum size effect and macroscopic quantum tunneling effect of nanoparticles, they have characteristics that conventional materials do not have in terms of magnetism, light, electricity, and sensitivity. Therefore, nanoparticles are widely used in magnetic materials, electronic materials, etc. , Optical materials, sintering of high-density materials, catalysis, sensing, ceramic toughening, etc. have broad application prospects. However, in the actual use process, it is found that nano powders also...

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): C01G23/053B82Y40/00C02F1/30B01J21/06
CPCY02W10/37
Inventor 杨勇汪国忠康升红王惠敏邓泉梁艳
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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