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Au-GSH@TiO2@PDMS composite material, and preparation method and application of Au-GSH@TiO2@PDMS composite material

A composite material, au-gsh technology, applied in catalyst activation/preparation, chemical instruments and methods, organic compound/hydride/coordination complex catalysts, etc., can solve the problem of poor optical stability of noble metal nanoclusters , to achieve the effect of improving photostability and solving photoagglomeration

Active Publication Date: 2020-05-19
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the technical problem of poor optical stability of noble metal nanoclusters in the prior art, the present invention provides an Au-GSH@TiO 2 Preparation method of @PDMS composite material

Method used

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  • Au-GSH@TiO2@PDMS composite material, and preparation method and application of Au-GSH@TiO2@PDMS composite material
  • Au-GSH@TiO2@PDMS composite material, and preparation method and application of Au-GSH@TiO2@PDMS composite material
  • Au-GSH@TiO2@PDMS composite material, and preparation method and application of Au-GSH@TiO2@PDMS composite material

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Effect test

Embodiment 1A

[0026] The preparation of embodiment 1Au-GSH

[0027] Take 20 parts of GSH, 10 parts of HAuCl 4 In a 250mL round-bottomed flask, after stirring at room temperature for 2 hours, Au-GSH complexes are formed, and the solution becomes clear at this time, then the reaction is transferred to an oil bath, heated to 70°C, and the reaction is continued for 24 hours to synthesize brown-yellow Au -GSH solution; the Au-GSH is scanned by transmission electron microscope, and its TEM picture is shown in figure 1 , figure 1 It shows that the present invention successfully synthesizes ultra-small Au-GSH clusters with a size of 1-3nm.

Embodiment 2

[0028] Example 2TiO 2 preparation of

[0029]Take 40 parts of isopropanol, 40 parts of isopropanol, and 5 parts of n-tetrabutyl titanate, add them into a 50mL autoclave, and switch to a 180°C oven for 12 hours to produce white, amorphous TiO 2 The particles were washed by centrifugation with 50 parts of isopropanol, and dried at 60°C. Finally, the white TiO 2 The particles were placed in a tube furnace for high-temperature crystallization at a temperature of 450°C, a heating rate of 5°C / min, and a time of 2h to prepare crystallized photocatalyst TiO 2 particles; the TiO 2 Particles were scanned by transmission electron microscope, and the TEM images are shown in figure 2 , figure 2 Show, the present invention successfully prepares TiO 2 Nanoparticles, whose particle size is uniform.

Embodiment 3

[0030] Example 3Au-GSH@TiO 2 Preparation of composite materials

[0031] Get 100 parts of crystallization TiO prepared by embodiment 2 2 Particles, 1 part of Au-GSH prepared in Example 1, 250 parts of water in a 500mL beaker, then adjust the pH to 4 with sulfuric acid and sodium hydroxide, and stir at room temperature for 24h to prepare Au-GSH@TiO 2 composite material. For the Au-GSH@TiO 2 The composite material was scanned by transmission electron microscope, and its TEM image is shown in image 3 , image 3 It shows that the present invention has successfully prepared Au-GSH@TiO 2 Composite materials, ultra-small Au-GSH clusters uniformly loaded on TiO 2 nanoparticles.

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Abstract

The invention belongs to the technical field of Au-GSH@TiO2@PDMS composite materials, and discloses an Au-GSH@TiO2@PDMS composite material, and a preparation method and application thereof. The preparation method for the Au-GSH@TiO2@PDMS composite material comprises the following steps: synthesizing a gold nanocluster Au-GSH protected by glutathione (GSH), preparing crystalline TiO2, preparing anAu-GSH@TiO2 composite material, and grafting PDMS onto the surface of the Au-GSH@TiO2 by adopting an ultraviolet light curing method so as to finally obtain the Au-GSH@TiO2@PDMS composite material. According to the Au-GSH@TiO2@PDMS composite material, the light stability of the Au-GSH is effectively improved, and the problem of photo-induced agglomeration of traditional metal nanoclusters is effectively solved.

Description

technical field [0001] The present invention relates to Au-GSH@TiO 2 @PDMS composites, especially involving Au-GSH@TiO 2 @PDMS composite materials and their preparation methods and applications. Background technique [0002] Metal nanoclusters are discovered in recent years and consist of a specific number of metal atoms and ligands, with a size of 1-3nm ultra-small particles. Due to their unique physical and chemical performance, such as ultra-small size, large specific surface area, electronic Due to the discrete structure and many active sites, metal nanoclusters are often used to combine with semiconductors to improve the photocatalytic activity of semiconductors. It is well known that the size of metal nanoclusters is an important factor in determining the activity of catalysts. Generally speaking, the smaller the size, the larger the specific surface area and the higher the catalytic activity. In an unstable state, under light conditions, different metal nanocluster...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/22B01J31/34B01J31/06B01J21/06B01J37/02
CPCB01J31/226B01J31/1625B01J21/063B01J31/069B01J37/0215B01J35/39
Inventor 朱海光刘勇袁勋
Owner QINGDAO UNIV OF SCI & TECH
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