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Preparing method for gold-aluminum oxide nano composite film

A kind of aluminum oxide nano-composite film technology, applied in the field of materials, can solve the problems of poor stability of composite sol, limit the application and development of nano-gold-ceramic composite film, and achieve the effect of strong absorption

Inactive Publication Date: 2019-05-24
袁兵
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the strong chemical reactivity of the gold-oxide precursor sol-gel system and the poor stability of the composite sol seriously limit the wide application and development of nano-gold-ceramic composite films.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0020] The invention discloses a method for preparing a gold-alumina nanocomposite film, comprising:

[0021] (1) Mix a certain amount of isopropanol, concentrated nitric acid and acetylacetone evenly, add aluminum isopropoxide, and reflux at 60-90°C for 5-8 hours to obtain a mixed solution;

[0022] (2) Add tetrachloroauric acid ethanol solution to the above mixed solution, stir magnetically at 20-30°C for 4-6 hours, let stand, and age for 24-48 hours to obtain gold-alumina composite sol;

[0023] (3) Immerse the cleaned carrier in the above-mentioned aged gold-alumina composite sol and pull it 4 to 6 times, the pulling speed is controlled at 1 to 10 cm / min, and after each pulling, the heat treatment for 5-10 minutes under the condition, and naturally cool to room temperature to obtain a gold-alumina nanocomposite thin film.

[0024] In step (1), the ratio of the volume of the isopropanol to the mass of the aluminum isopropoxide is 10-50mL:0.5-5g, preferably, the volume of t...

Embodiment

[0030] 1. Preparation of aluminum isopropoxide

[0031] 1) Put isopropanol with a water content higher than 0.3% in the reaction kettle, put an appropriate amount of aluminum isopropoxide into the isopropanol as a dehydrating agent, stir fully for 40 minutes, put in metal aluminum flakes, then put in catalyst, and heat to 90°C, the evaporating product condenses and returns to the reaction kettle, and then continues to stir fully to make the metal aluminum flakes react with isopropanol;

[0032] 2) After the metal aluminum flakes have completely reacted, raise the temperature to 85°C, evaporate the excess isopropanol, then carry out vacuum distillation at an absolute pressure of 1340Pa, and collect fractions at 130-140°C to obtain high-purity isopropanol Alcohol aluminum.

[0033] 2. Preparation of gold-alumina nanocomposite film

[0034] (1) Mix 30 mL of isopropanol with concentrated nitric acid and acetylacetone evenly, add 1 g of aluminum isopropoxide, and reflux at 80°C f...

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PUM

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Abstract

The invention discloses a preparing method for a gold-aluminum oxide nano composite film. The preparing method comprises the steps that firstly, a certain amount of isopropyl alcohol, a certain amountof concentrated nitric acid and a certain amount of acetylacetone are evenly mixed, aluminium isopropoxide is added, backflow is conducted for 5-8 h under the condition of 60-90 DEG C, and a mixed solution is obtained; secondly, a chloroauric acid ethanol solution is added in the mixed solution, magnetic stirring is conducted for 4-6 h under the condition of 20-30 DEG C, standing is conducted, ageing is conducted for 24-48 h, and gold-aluminum oxide composite sol is obtained; and thirdly, a cleaned carrier is immersed in the aged gold-aluminum oxide composite sol to be lifted and pulled 4-6 times, the lifting and pulling speed is controlled at 1-10 cm / min, and after lifting and pulling are finished every time, heat treatment is conducted for 5-10 min under the condition of 50-80 DEG C, natural cooling is conducted to the room temperature, and the gold-aluminum oxide nano composite film is obtained. According to the gold-aluminum oxide nano composite film prepared through the method, gold grains can be evenly scattered in an aluminum oxide matrix, and the composite film has strong absorption in the visible light area.

Description

technical field [0001] The invention relates to the field of material technology, in particular to a method for preparing a gold-alumina nanocomposite film. Background technique [0002] Nano-metal-ceramic composite thin films have attracted great attention from scholars at home and abroad in recent years due to their potential application prospects in the fields of optics, heat, mechanics, electromagnetism, and catalysts. The design and performance research of nanometer metal-ceramic composite films has become one of the main trends in the development of composite materials. At present, the metals dispersed in the reported composite films mainly include gold, silver, copper, iron and nickel. Among them, gold-ceramic composite thin films are more widely studied due to their fast response to nonlinear optical properties and stability to high-energy laser radiation. [0003] The traditional preparation method of gold-ceramic composite film is melt quenching method, but the f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C18/12C01F7/36
Inventor 袁兵
Owner 袁兵