au-gsh@tio 2 @pdms composites and their preparation methods and applications

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

Active Publication Date: 2021-09-10
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@tio <sub>2</sub> @pdms composites and their preparation methods and applications
  • au-gsh@tio <sub>2</sub> @pdms composites and their preparation methods and applications
  • au-gsh@tio <sub>2</sub> @pdms composites and their preparation methods and applications

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1 Preparation of Au-GSH

[0027] Take 20 parts of GSH and 10 parts of HAuCl4 in a 250mL round bottom flask, stir at room temperature for 2 hours, Au-GSH complex is formed, the solution becomes clear at this time, then transfer the reaction to an oil bath, heat to 70 °C, Continue to react for 24h to synthesize a brownish-yellow Au-GSH solution; the Au-GSH is scanned by a transmission electron microscope, and its TEM image 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 2 TiO 2 preparation of

[0029]Take 40 parts of isopropanol, 40 parts of isopropanol, and 5 parts of n-tetrabutyl titanate, add them to a 50mL autoclave, and switch to a 180°C oven for 12 hours to generate 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 3 Au-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 present invention belongs to Au‑GSH@TiO 2 @PDMS Composite Materials Technology Field, Au‑GSH@TiO has been disclosed 2 @PDMS composite materials and their preparation methods and applications. Au‑GSH@TiO 2 The preparation method of @PDMS composite materials includes the synthesis of glutathione (GSH)-protected gold nanoclusters Au‑GSH, crystalline TiO 2 Preparation of Au‑GSH@TiO 2 The preparation of composite materials and the grafting of PDMS on the surface of Au‑GSH@TiO2 by ultraviolet light curing method will finally give Au‑GSH@TiO2 2 @PDMS composites. The Au‑GSH@TiO 2 The @PDMS composite effectively improves the photostability of Au‑GSH and effectively solves the problem of photoagglomeration of traditional metal nanoclusters.

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 Patents(China)
IPC IPC(8): B01J31/22B01J31/34B01J31/06B01J21/06B01J37/02
CPCB01J21/063B01J31/069B01J31/1625B01J31/226B01J35/004B01J37/0215
Inventor 朱海光刘勇袁勋
Owner QINGDAO UNIV OF SCI & TECH
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