Gold nanoparticle loaded mesoporous titanium oxide composite film and preparation thereof

A technology of mesoporous titanium oxide and gold nanoparticles, which is used in instruments, nonlinear optics, optics, etc. to achieve uniform distribution, uniform size, and avoid heat accumulation.

Inactive Publication Date: 2010-03-17
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cubic mesoporous titanium oxide composite film supported by gold nanoparticles has outstanding characteristics such as concentrated gold particle size distribution and uniform spatial distribution, and has a wide range of practical application values. There are few reports on thin films and their preparation methods

Method used

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  • Gold nanoparticle loaded mesoporous titanium oxide composite film and preparation thereof
  • Gold nanoparticle loaded mesoporous titanium oxide composite film and preparation thereof
  • Gold nanoparticle loaded mesoporous titanium oxide composite film and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] 1. Preparation of mesoporous titanium oxide film: Dissolve 0.33 g of surfactant F127 in 18.4 g of ethanol and stir for 3 hours. Then, 1.7 g of titanium tetrachloride was slowly added dropwise to the above solution, and stirring was continued for 2 hours. The obtained sol was placed in an environment with a relative humidity of 85%, and pulled to form a film at a rate of 70 cm / min.

[0045] After drying at room temperature for 24 hours, the small-angle XRD pattern of the film is as shown in the accompanying drawings figure 1 (a) as shown, figure 1 (a) is the XRD curve of the mesoporous titanium oxide film in the two-dimensional hexagonal mesoporous phase. The diffraction peak in curve (a) corresponds to the (100) plane diffraction peak of the two-dimensional hexagonal mesoporous phase.

[0046] The transmission electron micrograph is as in the attached drawings figure 2 As shown, the film has a two-dimensional hexagonal mesoporous structure. The ordered mesoporous titanium ...

Embodiment 2

[0054] 1. Heat-treat the ordered mesoporous titanium oxide film dried at room temperature (heat up to 400°C at a rate of 2°C / min, keep it for 4 hours, and cool down with the furnace) to remove the surfactant F127. According to BET detection, the pore size of the two-dimensional hexagonal mesoporous structure prepared in this example is 6nm; the pore volume is 0.16cm 3 / g.

[0055] 2. Immerse the mesoporous film from which the surfactant has been removed into a 0.5mM chloroauric acid aqueous solution, heat it to 70°C, and slowly drop in sodium hydroxide aqueous solution at a rate of 1.5ml / min (sodium hydroxide aqueous solution, sodium hydroxide The concentration is 1M), while stirring, when the pH value of the above-mentioned mixed solution reaches 7, the dropwise addition of the sodium hydroxide aqueous solution is stopped. Then, take the film out of the mixed solution, rinse the surface with deionized water, dry at room temperature, and put it into a hydrogen / argon mixed atmosph...

Embodiment 3

[0057] 1. Preparation of mesoporous titanium oxide film: Dissolve 0.33 g of surfactant F127 in 18.4 g of ethanol and stir for 3 hours. Then, 1.7 g of titanium tetrachloride was slowly added dropwise to the above solution, and stirring was continued for 2 hours. The resulting sol was placed in an environment with a relative humidity of 85%, and pulled into a film at a rate of 70 cm / min.

[0058] 2. Heat the ordered mesoporous titanium oxide film dried at room temperature (heat up to 450°C at a rate of 2°C / min, keep it for 5 hours, and cool down with the furnace) to remove the surfactant F127. According to BET detection, the pore size of the two-dimensional hexagonal mesoporous structure prepared in this example is 6nm; the pore volume is 0.16cm 3 / g.

[0059] 3. Immerse the mesoporous film from which surfactant has been removed into a 5mM chloroauric acid aqueous solution, heat to 80°C, slowly add sodium hydroxide aqueous solution dropwise while stirring, and stop the dropwise addi...

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Abstract

The invention belongs to the field of non-linear optical material, in particular to a gold nanoparticle loaded mesoporous titanium oxide composite film and preparation thereof. The gold nanoparticle loaded mesoporous titanium oxide composite film of the invention is composed of titanium oxide and Au, and the microstructure of the composite film is characterized in that gold nanoparticles are distributed in the pore canal of the mesoporous titanium oxide film. The gold nanoparticle in the composite film of the invention has even particle size and even distribution and has higher off-resonance third-order nonlinear susceptibility (x<3>=6.32*10<-8>esu); the composite film can avoid heat accumulation brought by nonlinear adsorption when working in off-resonance condition, which is more favorable for the practical application of nonlinear material. The preparing method of the gold nanoparticle loaded mesoporous titanium oxide composite film of the invention adopts a deposition precipitationmethod, leads in second-phase material in the mesoporous pore canal and has the characteristics of simpleness, high speed, high efficiency and the like.

Description

Technical field [0001] The invention belongs to the field of nonlinear optical materials, and specifically relates to a mesoporous titanium oxide composite film supported by gold nanoparticles and a preparation thereof. Background technique [0002] Nonlinear optics is a science that developed rapidly after the appearance of laser. The polarization of the medium under the action of a strong laser field is no longer a linear relationship with the incident radiation field strength, but is related to the second, third, and even higher order terms of the field strength. This relationship is called nonlinear . All optical phenomena related to nonlinearity are called nonlinear optical phenomena. Since Franken first discovered the crystal nonlinear optics (NLO) effect in 1961, NLO materials have been used in the optoelectronics industry, including optical communications, optical information processing, storage and holography, optical computers, laser weapons, laser precision processin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/355
Inventor 崔方明施剑林华子乐魏晨阳何前军高哲黄为民
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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