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

Nano TiO2/PMMA composite photocatalyst synthesized by microwave heating method in ion liquid

A technology of ionic liquid and microwave synthesis, which is applied in the direction of organic compound/hydride/coordination complex catalyst, physical/chemical process catalyst, nanotechnology, etc. Capacitance and other issues, to achieve the effect of reducing energy consumption, lowering reaction temperature, and improving photocatalytic activity

Inactive Publication Date: 2009-08-19
YUNNAN NORMAL UNIV
View PDF0 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, inorganic modified TiO 2 cannot change its compatibility with organic media, while the polymer / TiO 2 The preparation process of composite materials is complicated, which limits the modification of TiO 2 usage of

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
  • Nano TiO2/PMMA composite photocatalyst synthesized by microwave heating method in ion liquid
  • Nano TiO2/PMMA composite photocatalyst synthesized by microwave heating method in ion liquid
  • Nano TiO2/PMMA composite photocatalyst synthesized by microwave heating method in ion liquid

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0021] 1 Preparation of ionic liquids

[0022] Using 1-methylimidazole and bromo-n-butane (bromoallyl) with a ratio of substance amount of 1:1, the intermediate 1-butyl-3-methylimidazole bromide is prepared under microwave heating conditions Salt [Bmim]Br or [Amim]Br (XH-100A microwave catalytic synthesis / extractor); then use sodium tetrafluoroborate or potassium hexafluorophosphate to react with the intermediate to prepare [Bmim]BF respectively 4 、[Bmim]PF 6 、[Amim]BF 4 three ionic liquids.

[0023] 2TiO 2 Preparation of / PMMA composites

[0024] Butyl titanate is used as a precursor, the ionic liquid prepared in the above step 1 is used as a reaction medium, and a certain amount of absolute ethanol is added. Measure a certain amount of butyl titanate and slowly drop it into the ionic liquid, stir evenly with a magnetic force, add 0.01g sodium lauryl sulfate, continue stirring for 10 minutes, add MMA monomer and stir for another 3 minutes, then put it into the microwave ...

Embodiment 1

[0026] 1. Preparation of ionic liquids

[0027] Using 1-methylimidazole and n-butane bromide with a substance ratio of 1:1, the intermediate 1-butyl-3-methyl bromide was prepared under microwave heating conditions (500W, 80°C, 2h) Imidazolium salt ([Bmim]Br) (XH-100A microwave catalytic synthesis / extractor); then prepare [Bmim]BF with sodium tetrafluoroborate and intermediate reaction 4 ionic liquid. a, b, c and d in Figure 3 are pure PMMA and loaded TiO 2 SEM image of the PMMA after.

[0028] 2. TiO2 2 Preparation of / PMMA composites

[0029] With butyl titanate as precursor, [Bmim]BF 4 The ionic liquid was used as the reaction medium, and 17.5ml of absolute ethanol was added. Measure 3.4ml of butyl titanate and slowly drop it into the ionic liquid, stir evenly with a magnetic force, add 0.01g sodium lauryl sulfate, continue stirring for 10 minutes, add methyl methacrylate (MMA) monomer and stir for another 3 minutes, Then put into microwave catalysis / synthesis extract...

Embodiment 2

[0032] 1. Preparation of ionic liquids

[0033]Using 1-methylimidazole and n-butane bromide with a substance ratio of 1:1, the intermediate 1-butyl-3-methyl bromide was prepared under microwave heating conditions (500W, 80°C, 2h) Imidazolium salt ([Bmim]Br) (XH-100A microwave catalytic synthesis / extractor); then prepare [Bmim]PF by reacting with potassium hexafluorophosphate and intermediate 6 ionic liquid.

[0034] 2. TiO2 2 Preparation of / PMMA composites

[0035] With butyl titanate as precursor, [Bmim]PF 6 The ionic liquid was used as the reaction medium, and 17.5ml of absolute ethanol was added. Measure 3.4ml of butyl titanate and slowly drop it into the three ionic liquids, stir evenly with a magnetic force, add 0.01g sodium lauryl sulfate, continue stirring for 10min, add methyl methacrylate (MMA) monomer and stir again 3min, then put it into the microwave catalytic / synthetic extractor, set the microwave radiation power (700W), time (35min) and reaction temperature...

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 nano TiO2 / PMMA composite materials prepared by synthesizing three ionic liquids, namely BmimBF4, BmimPF6 and AmimBF4 by a microwave heating method respectively, and taking the ionic liquids as a reaction medium under the condition of microwave radiation respectively. The composite materials are subjected to testing and characterization by XRD, IR, SEM, TG and BET, and subjected to photocatalytic degradation performance test by a methyl orange solution under a high-pressure mercury lamp; the results show that the composite materials have an optimum preparation condition as for different ionic liquids, and the photocatalytic activity of the TiO2 / PMMA composite materials can be obviously improved by adoption of the ionic liquids as the reaction medium; the prepared TiO2 / PMMA composite materials represent high photocatalytic activity without high-temperature calcination; and the photocatalytic activity of the composite materials is further improved after TiO2 is loaded with PMMA and is obviously superior to that of an unloaded nano TiO2 catalyst under the same condition.

Description

technical field [0001] The invention relates to the synthesis of 1-allyl-3-methylimidazolium tetrafluoroborate (ie [Amim] BF) by microwave heating 4 ), 1-butyl-3-methylimidazolium tetrafluoroborate (namely [Bmim] BF 4 ), 1-butyl-3-methylimidazolium hexafluorophosphate (namely [Bmim]PF 6 ) three kinds of ionic liquids, especially related to nano-titanium dioxide / polymethyl methacrylate (i.e. TiO 2 / PMMA) composites. Background technique [0002] Due to TiO 2 Photocatalyst has the advantages of high stability, corrosion resistance, harmless to human body, etc., so it has attracted more and more attention from academia and industry, and is expected to become a material with a wide range of applications. But TiO 2 The photogenerated electrons-holes are easy to recombine, and the powder is easy to agglomerate, these shortcomings limit the TiO 2 usage of. A large number of studies have shown that through metal doping, semiconductor recombination and noble metal deposition, ...

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): B01J21/06B01J31/06B82B3/00B01J19/08
Inventor 毕先钧杨艳琼张桂琴李丽王昭
Owner YUNNAN NORMAL UNIV
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