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Method for preparing titanium dioxide hollow sphere containing gold nano particles

A technology of gold nanoparticles and titanium dioxide, which is applied in the field of preparation of titanium dioxide hollow spheres, can solve the problems of unfavorable product application, single function of shell macromolecule, etc.

Inactive Publication Date: 2007-12-12
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the single function of the shell polymer of the product and the fixed size of the core gold particles, it is not conducive to the future application of the product

Method used

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  • Method for preparing titanium dioxide hollow sphere containing gold nano particles
  • Method for preparing titanium dioxide hollow sphere containing gold nano particles
  • Method for preparing titanium dioxide hollow sphere containing gold nano particles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Example 1: Preparation of titanium dioxide hollow spheres containing gold particles and having an outer wall thickness of 80 nm:

[0022] Dissolve 0.2 g of glucose in 200 ml of water, stir for 15 minutes, add dropwise 2500 microliters of 0.01 mol / L chloroauric acid solution, stir for another 10 minutes, and then transfer to a 45 ml Teflon-lined In the autoclave, the closed reaction was carried out at 160°C for 20 hours, and the obtained product was washed by centrifugation for three times and then dried.

[0023] Take 1 gram of the above-prepared carbon spheres containing gold cores, disperse them into 400 ml of anhydrous ethylene glycol, add 500 microliters of nitric acid with a concentration of 0.01 mol / liter dropwise, stir for 10 minutes, and then dissolve them at 100 microliters / minute. 5000 microliters of tetra-n-butyl titanate with a concentration of 3 mol / liter was added dropwise at a high speed, refluxed in an oil bath at 180°C for 60 minutes, centrifuged and wa...

Embodiment 2

[0030] Example 2: Preparation of titanium dioxide hollow spheres containing gold particles and having an outer wall thickness of 15 nm:

[0031] In this embodiment, the carbon source is sucrose as an example. Dissolve 0.2 g of sucrose in 25 milliliters of water. After stirring for 15 minutes, add 350 microliters of chloroauric acid with a concentration of 0.4 mol / liter dropwise, stir for another 10 minutes, and then transfer to 45 In an autoclave with a polytetrafluoroethylene liner, the reaction was closed at 200°C for 6 hours, and the product was washed by centrifugation three times and then dried.

[0032] Take 1 gram of the above-prepared carbon spheres containing gold cores and disperse them into 50 ml of anhydrous glycerol, add 30 microliters of nitric acid with a concentration of 2 mol / liter dropwise, stir for 10 minutes, and then dissolve at a speed of 10 microliters / minute. 500 microliters of tetra-n-butyl titanate with a concentration of 0.1 mol / liter was added dropw...

Embodiment 3

[0035] Example 3: Preparation of titanium dioxide hollow spheres containing gold particles and having an outer wall thickness of 45 nm:

[0036] In this embodiment, the carbon source is maltose as an example. Dissolve 0.2 g of maltose in 100 ml of water, stir for 15 minutes, add dropwise 1200 microliters of chloroauric acid with a concentration of 0.1 mol / liter, stir for another 10 minutes, and then transfer to 45 In an autoclave with a polytetrafluoroethylene liner, the reaction was closed at 180°C for 10 hours, and the product was washed by centrifugation three times and then dried.

[0037] Take 1 gram of the above-prepared carbon spheres containing gold cores and disperse them into 100 ml of anhydrous ethylene glycol, add 200 microliters of nitric acid with a concentration of 0.1 mol / liter dropwise, stir for 10 minutes, and then add 200 microliters of nitric acid at a rate of 50 microliters / minute 2000 microliters of tetra-n-butyl titanate with a concentration of 1 mol / lit...

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Abstract

The making of titania hollow ball with nanometer grains features int eh making of carbon balls with gold core through high temperature seal conditions, picking out 1 g of the said carbon ball to scatter inside the water free ethandiol or glycerin in 2.5-20g / L, dropping 30-500 micro litter aqua fortis of 0.01-2 m / l, then butyl titanate 500-5000 micro litter in 0.1-3m / l in the speed of 10-100 micro litter per minute, flowing in the silicon oil for 60-180 minutes, depositing in 600-800deg.C and calcining for 60-200 mintues. The sealed hollow ball has seal volume providing the movement of the gold core. Size of the hollow ball inside gold core and shell thickness can be adjusted.

Description

Technical field: [0001] The invention belongs to the technical field of nanomaterial preparation, in particular to a method for preparing titanium dioxide hollow spheres containing gold nanoparticles. Background technique: [0002] The American "Science" magazine (Science, Volume 3, 2004, pages 711-714) reported the successful preparation of cobalt oxide or cobalt selenide hollow sphere structures and cobalt oxide shell-coated platinum using techniques similar to the Tyndall effect. The core-shell structure of the particle core. However, the precursor used in the hollow sphere is cobalt octacarbonyl, which has high cost and high toxicity, and is not suitable for large-scale industrial production. [0003] The Journal of the American Chemical Society "Langumir" (Langumir, 2006, vol. 22, pp. 1307-1310) reported the use of a closed system hydrolysis method to prepare a uniform titanium dioxide-coated silver nanowire core-shell at less than 200 ° C. structure. However, the li...

Claims

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Application Information

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IPC IPC(8): B22F1/00B22F9/24C22C1/04C22C1/08
Inventor 俞书宏闵宇霖
Owner UNIV OF SCI & TECH OF CHINA
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