Titanium dioxide/metal core-shell structure composite nano-particle and preparing method thereof

A technology of composite nanoparticles and titanium dioxide, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, nanotechnology, etc., can solve the problem that the surface area cannot be fully utilized

Inactive Publication Date: 2014-11-12
ZHEJIANG NORMAL UNIVERSITY
View PDF2 Cites 21 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, directly wrapping titanium dioxide on the noble metal will make the inner surface of the titanium dioxide sh

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
  • Titanium dioxide/metal core-shell structure composite nano-particle and preparing method thereof
  • Titanium dioxide/metal core-shell structure composite nano-particle and preparing method thereof
  • Titanium dioxide/metal core-shell structure composite nano-particle and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0037] Correspondingly, the present invention also provides a preparation method of titanium dioxide / gold core-shell composite nanoparticles, comprising the following steps:

[0038] a) providing an aqueous solution of titanium dioxide hollow nanoparticles whose inner surface is modified with amino groups;

[0039] b) Dispersing the aqueous solution of titanium dioxide hollow nanoparticles with amino groups modified on the inner surface in the aqueous solution of chloroauric acid, ultrasonically reacting after the first stirring in the dark, heating in a water bath at 40-80°C, and stirring for the second time in the dark centrifuged and dried to obtain AuTiO 2 Composite nanoparticles, which means coated;

[0040] c) the AuTiO 2 The composite nanoparticles are annealed at high temperature to obtain titanium dioxide / gold core-shell composite nanoparticles.

[0041]The invention uses titanium dioxide hollow nanoparticles modified with amino groups on the inner surface as raw m...

Embodiment 1

[0062] a. In a 50ml glass bottle, mix cyclohexane, Tritox X-100, n-hexanol, deionized water and ammonia water evenly, with a volume ratio of 150:35:35:8:2, and stir until clear and transparent;

[0063] b. 300 microliters of tetraethyl orthosilicate, 150 microliters of N-aminoethyl-γ-aminopropyltrimethoxysilane and 1 milliliter of cyclohexane were mixed evenly, and then added to the mixed solution in the previous step at one time, Stir for 24 hours;

[0064] c. Add an equal volume of ethanol to the mixed solution formed in the previous step to break the emulsion, then centrifuge and wash it, and then disperse it in 16 ml of isopropanol to form O-SiO with a concentration of 0.1 mol / L 2 Nanosphere isopropanol solution, "O" means organic hybrid.

[0065] d. In a 50 ml glass bottle, mix isopropanol, deionized water and ammonia water to form a mixed solution, and 1 ml of O-SiO with a concentration of 0.1 mol / L 2 The nanosphere isopropanol solution is added to the aforementioned m...

Embodiment 2

[0072] a. In a 50ml glass bottle, mix cyclohexane, Tritox X-100, n-hexanol, deionized water and ammonia water evenly, with a volume ratio of 150:35:35:8:2, and stir until clear and transparent;

[0073] b. 300 microliters of tetraethyl orthosilicate, 150 microliters of N-aminoethyl-γ-aminopropyltrimethoxysilane and 1 milliliter of cyclohexane were mixed evenly, and then added to the mixed solution in the previous step at one time, Stir for 24 hours;

[0074] c. Add an equal volume of ethanol to the mixed solution formed in the previous step to break the emulsion, then centrifuge and wash it, and then disperse it in 16 ml of isopropanol to form O-SiO with a concentration of 0.1 mol / L 2 Nanosphere isopropanol solution, "O" means organic hybrid.

[0075] d. In a 50 ml glass bottle, mix isopropanol, deionized water and ammonia water to form a mixed solution, and 1 ml of O-SiO with a concentration of 0.1 mol / L 2 The nanosphere isopropanol solution is added to the aforementioned m...

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 provides a titanium dioxide/metal core-shell structure composite nano-particle and a preparing method thereof. The method comprises the steps that a water solution of titanium dioxide hollow nano-particles with inner surfaces modified with amino is provided and is scattered in a chloroauric acid water solution, and ultrasound reaction is carried out after light shielding stirring is carried out for the first time; water bath heating is carried out, centrifugal separation is carried out after light shielding stirring is carried out for the second time, and Au@TiO2 composite nano-particles are obtained after drying; the Au@TiO2 composite nano-particles are annealed at the high temperature to obtain the titanium dioxide/metal core-shell structure composite nano-particle. The preparing method is simple, easy to operate and high in repeatability. The size of the prepared material is even. The specific surface area is improved through a hollow structure, and light catalysis is facilitated; a shell layer is thin, the scattering difficulty of electrons and cavities is lowered, and the shell can easily arrive at the surface of the material to be involved in the catalytic reaction; the material is good in dispersity in water, the purpose of further separating the electrons and the cavities is achieved through the titanium dioxide/metal core-shell structure, and the photocatalytic activity is improved.

Description

technical field [0001] The invention relates to the technical field of inorganic nanomaterials, in particular to a titanium dioxide / gold core-shell composite nanoparticle and a preparation method thereof. Background technique [0002] Titanium dioxide (TiO 2 ) as a non-toxic, stable, and efficient photocatalyst has been widely used in environmental and energy fields such as water treatment, pollutant degradation, and solar cells. As a photocatalyst, the electrons in the valence band of titanium dioxide jump to the conduction band under the excitation of ultraviolet light, generating electron-hole pairs, then the electrons and holes are separated, migrate to the surface of titanium dioxide, and then react with water and oxygen around the surface to generate Oxygen-containing free radicals, the formed oxygen-containing free radicals have super-strong oxidizing ability, can oxidize most organic matter, and completely degrade them into carbon dioxide and water. However, in pra...

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): B01J23/52B01J35/02B82Y30/00B82Y40/00
Inventor 李正全郑蒙蒙李磊周诗琪
Owner ZHEJIANG NORMAL UNIVERSITY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap