Photostimulation responsive intelligent catalytic material and preparation method thereof

A catalytic material and photo-stimulation technology, applied in chemical instruments and methods, catalyst protection, physical/chemical process catalysts, etc., can solve problems such as reduced surface energy, reduced catalytic activity, and easy agglomeration, so as to prevent aggregation and migration, Good protective effect, convenient and intuitive observation and judgment effect

Inactive Publication Date: 2017-04-26
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high specific surface area of ​​metal nanoparticles, it is easier to agglomerate during use, that is, to aggregate into large particles to reduce the surface energy, thereby reducing its catalytic activity.

Method used

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  • Photostimulation responsive intelligent catalytic material and preparation method thereof
  • Photostimulation responsive intelligent catalytic material and preparation method thereof
  • Photostimulation responsive intelligent catalytic material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Preparation of photo-stimuli-responsive layer loaded with catalyst nanoparticles:

[0025] 0.82g hydroxyethyl methacrylate cinnamate, 0.16g acrylamide, 0.24g silver nitrate and 0.01g N,N-methylenebisacrylamide were dissolved in 2.5ml dimethyl sulfoxide, then added 0.08g azo Diisobutyronitrile, ultrasonic treatment for 10min, after it was completely dissolved, reacted at 70°C for 2h. After the gel was polymerized, it was taken out, cooled to room temperature, and silver nitrate in the gel was reduced with 0.1 M sodium borohydride solution. Then the obtained gel was soaked in methanol, and the solvent was changed every 8 hours; after 2 days, it was soaked in deionized water, and the deionized water was changed every 8 hours, and the photostimuli-responsive layer loaded with catalyst nanoparticles was obtained after 2 days.

[0026] Preparation of smart catalytic materials with bilayer structure:

[0027] 0.4 g of acrylamide was dissolved in 1.5 mL of deionized water, an...

Embodiment 2

[0029] Preparation of photo-stimuli-responsive layer loaded with catalyst nanoparticles:

[0030] 0.76g of cinnamic acid hydroxyethyl methacrylate, 0.1g of acrylamide, 0.2g of silver nitrate and 0.01g of N,N-methylenebisacrylamide were dissolved in 2ml of dimethyl sulfoxide, and then 0.06g of azobis Isobutyronitrile, ultrasonic treatment for 20min, after it is completely dissolved, react at 60°C for 3h. After the gel was polymerized, it was taken out, cooled to room temperature, and silver nitrate in the gel was reduced with 0.1 M sodium borohydride solution. Then the obtained gel was soaked in methanol, and the solvent was changed every 8 hours; after 2 days, it was soaked in deionized water, and the deionized water was changed every 8 hours, and the photostimuli-responsive layer loaded with catalyst nanoparticles was obtained after 2 days.

[0031] Preparation of smart catalytic materials with bilayer structure:

[0032] 0.4 g of acrylamide was dissolved in 2 mL of deioniz...

Embodiment 3

[0034] Preparation of photo-stimuli-responsive layer loaded with catalyst nanoparticles:

[0035] 0.9g hydroxyethyl methacrylate cinnamate, 0.2g silver nitrate and 0.01g N,N-methylenebisacrylamide were dissolved in 2.5ml dimethyl sulfoxide, then 0.07g azobisisobutyronitrile ( ), sonicated for 10 min, and reacted at 65°C for 2 h after it was completely dissolved. After the gel was polymerized, it was taken out, cooled to room temperature, and silver nitrate in the gel was reduced with 0.1M sodium borohydride solution. Then the obtained gel was soaked in methanol, and the solvent was changed every 8 hours; after 2 days, it was soaked in deionized water, and the deionized water was changed every 8 hours, and the photostimuli-responsive layer loaded with catalyst nanoparticles was obtained after 2 days.

[0036] Preparation of smart catalytic materials with bilayer structure:

[0037] 0.4 g of acrylamide was dissolved in 3 mL of deionized water, and 0.03 g of divinylbenzene was ...

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Abstract

The invention provides a photostimulation responsive intelligent catalytic material loaded with a nanoparticle catalyst and a preparation method thereof. The catalytic material has a two-layer structure. One layer is a photostimulation responsive layer loaded with a nanoparticle catalyst and the other layer is a non-responsive base layer without the catalyst. The catalyst nanometer particles are coated with a macromolecule material by an in-situ reaction so that the aggregation and migration of the nano-catalyst are effectively prevented. Through the unique double-layer structure design, the photostimulation responsive intelligent catalytic material can spontaneously and responsively control starting and stopping of a catalytic reaction under irradiation of lights with different wavelengths, the shape of the catalytic system can spontaneously and responsively produce remarkable change so that the starting and stopping states of the catalytic process can be directly observed and judged with the naked eyes and industrial production actual operation is promoted.

Description

technical field [0001] The invention relates to the field of photosensitive intelligent controllable catalysts, and specifically refers to an intelligent catalyst capable of controllable deformation and controllable catalysis under different wavelengths of light from the outside. Background technique [0002] In recent years, as a new type of catalyst, noble metal nanoparticles have received more and more attention and applications in the field of catalysis (D.Astruc, F.Lu, J.R.Aranzaes, Angew.Chem.Int.Ed.2005,44, 7852). However, due to the high specific surface area of ​​metal nanoparticles, it is easy to agglomerate during use, that is, to aggregate into large particles to reduce the surface energy, thereby reducing its catalytic activity. To solve this problem, loading noble metal nanoparticles on a suitable carrier material is an ideal method. For example, Xin Du et al. coated gold nanoparticles in hollow silicon spheres, and the prepared catalyst not only showed high ...

Claims

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Application Information

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IPC IPC(8): B01J31/06B01J33/00B01J35/02
CPCB01J31/06B01J33/00B01J35/396B01J35/50
Inventor 刘荣娟胡杰冷京航胡梦婷吴新振
Owner JIANGSU UNIV
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