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Preparation method and application of nano-limited-range photocatalytic hydrogel

A nano-confinement and hydrogel technology, applied in the field of nano-materials, can solve problems such as uneven structure and disadvantages

Active Publication Date: 2019-05-10
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For traditional hydrogels, due to the inhomogeneous structure caused by their random polymerization, it is not conducive to the selection of supports for confined catalysis.

Method used

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  • Preparation method and application of nano-limited-range photocatalytic hydrogel
  • Preparation method and application of nano-limited-range photocatalytic hydrogel
  • Preparation method and application of nano-limited-range photocatalytic hydrogel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Embodiment 1: Preparation of metal nanomaterial dispersion liquid

[0040] Add 2.48mL of hexachloroplatinic acid solution with a concentration of 0.25mol / L and 1.028g of polyvinylpyrrolidone into a 250mL round bottom flask, then dilute to 50mL with deionized water, stir and mix evenly; then accurately weigh 352mg of boron Sodium hydride, dissolved in 30mL of water, was slowly added dropwise into the round-bottomed flask under uniform stirring at a uniform speed, and then continued to stir at a constant speed for 1 hour after the dropwise addition, to obtain a metal nanomaterial dispersion with a particle shape.

Embodiment 2

[0042] 1. Surface modification of metal nanomaterials

[0043] To the metal nanomaterial dispersion with a concentration of 0.0078 mol / L and a zero-dimensional particle shape prepared in Step 1 of Example 1, add allylthiol, a functional modifier with a mass of 0.006% of the total mass of the metal nanomaterial dispersion, Thoroughly stir and uniformly ultrasonically mix for 5 minutes at room temperature to obtain a surface-modified noble metal nanomaterial dispersion.

[0044] 2. Dissolution of hydrophilic monomers and initiators and preparation of hydrogels

[0045] To the surface-modified noble metal nanomaterial dispersion obtained in step 1, add hydrophilic monomer acrylamide accounting for 20% of the total mass of the noble metal nanomaterial dispersion and 0.3% of the total mass of the noble metal nanomaterial dispersion Initiator persulfuric acid Ammonium, fully stirred at room temperature and ultrasonically mixed for 20 minutes, nitrogen was introduced for 10 minutes,...

Embodiment 3

[0048] 1. Surface modification of metal nanomaterials

[0049] To the metal nanomaterial dispersion with a concentration of 0.0078 mol / L and a zero-dimensional particle shape prepared in Step 1 of Example 1, add allylthiol, a functional modifier with a mass of 0.006% of the total mass of the metal nanomaterial dispersion, Thoroughly stir and uniformly ultrasonically mix for 5 minutes at room temperature to obtain a surface-modified noble metal nanomaterial dispersion.

[0050] 2. Dissolution of hydrophilic monomers, initiators and accelerators

[0051] To the surface-modified noble metal nanomaterial dispersion obtained in step 1, add hydrophilic monomer acrylamide accounting for 20% of the total mass of the noble metal nanomaterial dispersion, and 0.3% of the initiator persulfuric acid accounting for the total mass of the noble metal nanomaterial dispersion ammonium, fully stirred at room temperature and ultrasonically mixed for 20 minutes, nitrogen gas was introduced for 10...

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Abstract

The invention discloses a preparation method and an application of nano-limited-range photocatalytic hydrogel. According to the method, catalyst nano-particles modified by organic compounds serve as across-linking agent, and radical polymerization is implemented to form nano-composite hydrogel with uniform network structure in the presence of initiators, polymerizable monomers and catalysts. Graphene oxide is added in the polymerization process of the hydrogel, so that recombination of photogenerated electron-holes is reduced, and a rigid framework is introduced to control soluble inflation of the hydrogel in the catalytic process. The hydrogel is placed into photosensitizer and sacrificial agent water solution and can efficiently generate hydrogen under irradiating of visible light.

Description

technical field [0001] The invention relates to a preparation method and application of a nano-confined photocatalytic hydrogel, belonging to the technical field of nano-materials. Background technique [0002] With the continuous use of fossil energy, we are gradually facing two major problems of energy depletion and environmental pollution. Since solar energy is inexhaustible, clean and non-polluting, it is the preferred energy source in response to the sustainable development strategy. Hydrogen has a high combustion value and the combustion product is non-polluting water. Solar photolysis of water to produce hydrogen is one of the best ways to store solar energy. In the past few decades, people have mainly considered semiconductor materials, co-catalysts, electron-hole recombination, etc. when studying the hydrogen production system of photo-splitting water, and seldom considered the influence of reaction space on catalytic performance. From previous reports, we know th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/16C08J7/00C08L61/28C08F292/00C08F220/56B01J31/28
Inventor 从怀萍李娜秦海利蒋盼盼王阳宇
Owner HEFEI UNIV OF TECH
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