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Gold-nanoparticle-supported cubic mesoporous titanium oxide composite film and preparation thereof

A technology of gold nanoparticles and titanium oxide thin films, applied in instruments, nonlinear optics, optics, etc., to achieve uniform spatial distribution, wide application value, and uniform size

Inactive Publication Date: 2010-06-16
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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-supported cubic mesoporous titanium oxide composite film and preparation thereof
  • Gold-nanoparticle-supported cubic mesoporous titanium oxide composite film and preparation thereof
  • Gold-nanoparticle-supported cubic mesoporous titanium oxide composite film and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] 1. Preparation of ordered cubic mesoporous titanium oxide film:

[0042] Get 0.5g surfactant F127 (molecular formula is EO 106 PO 70 EO 106 ; wherein EO represents ethoxy, PO represents propoxy) was dissolved in 20.0g of ethanol, stirring. At the same time, 0.5 g of acetylacetone, 3.4 g of butyl titanate and 2.8 g of aqueous hydrochloric acid solution with a molar concentration of 26% were mixed and stirred. After 2 hours, mix the two solutions, continue to stir for 2 hours, place the obtained sol in an environment with a relative humidity of 85%, and dip and pull to form a film at a pulling speed of 70 cm / min.

[0043] After drying at room temperature for 24 hours, the small angle XRD pattern of the film is as follows figure 1 As shown in curve (a) in , the diffraction peak in curve (a) corresponds to the (110) plane and (200) diffraction peak of the cubic mesoporous phase.

[0044] Transmission electron micrographs as figure 2 as shown, figure 2 The cubic mes...

Embodiment 2

[0055] 1. Preparation of ordered cubic mesoporous titanium oxide film:

[0056] Dissolve 0.5g of surfactant F127 in 20.0g of ethanol and stir. At the same time, 0.5 g of acetylacetone, 3.4 g of butyl titanate and 2.8 g of aqueous hydrochloric acid solution with a molar concentration of 28% were mixed and stirred. After 2 hours, mix the two solutions, continue to stir for 2 hours, place the obtained sol in an environment with a relative humidity of 85%, and dip and pull to form a film at a pulling speed of 70 cm / min. The cubic mesoporous titanium oxide film has a cubic mesoporous structure, and its thickness is 118nm. Detected by a BET detector, the pore diameter of the ordered cubic mesoporous titanium oxide film prepared in this example is 7.3nm; the pore volume is 0.16cm 3 / g.

[0057] 2. Preparation of cubic mesoporous titanium oxide composite film supported by gold nanoparticles:

[0058] Heat treatment: After drying at room temperature, the ordered cubic mesoporous ti...

Embodiment 3

[0064] 1. Preparation of ordered cubic mesoporous titanium oxide film:

[0065] Dissolve 0.5g of surfactant F127 in 20.0g of ethanol and stir. At the same time, 0.5 g of acetylacetone, 3.4 g of butyl titanate and 2.8 g of aqueous hydrochloric acid solution with a molar concentration of 26-28% were mixed and stirred. After 2 hours, mix the two solutions, continue to stir for 2 hours, place the obtained sol in an environment with a relative humidity of 85%, and dip and pull to form a film at a pulling speed of 70 cm / min. The cubic mesoporous titanium oxide film has a cubic mesoporous structure, and its thickness is 118nm. Detected by a BET detector, the pore diameter of the ordered cubic mesoporous titanium oxide film prepared in this example is 7.3nm; the pore volume is .0.16cm 3 / g.

[0066] 2. Preparation of cubic mesoporous titanium oxide composite film supported by gold nanoparticles:

[0067] Heat treatment: After drying at room temperature, the ordered cubic mesoporou...

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Abstract

The invention belongs to the field of nonlinear optical materials, and in particular relates to a gold-nanoparticle-supported cubic mesoporous titanium oxide composite film and preparation thereof. The gold-nanoparticle-supported cubic mesoporous titanium oxide composite film consists of titanium oxide and Au, and the microstructure of the composite film is that gold nanoparticles are distributed in channels of the cubic mesoporous titanium oxide film. The gold-nanoparticle-supported cubic mesoporous titanium oxide composite film has regular, orderly and dimension-consistent cubic mesoporous channels, the gold nanoparticles are supported in the cubic mesoporous channels which have uniform dimension and high loading capacity, and the cubic mesoporous channels supported with the gold nanoparticles also maintains high order. The prepared composite film has high off-resonance third-order nonlinear susceptibility (x(3)=2.66*10-8esu) and has high application value in the field of nonlinear optics.

Description

technical field [0001] The invention belongs to the field of nonlinear optical materials, in particular to a cubic mesoporous titanium oxide composite film loaded with gold nanoparticles and its preparation. Background technique [0002] Nonlinear optics is a science that developed rapidly after the appearance of laser. The polarization intensity produced by 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 or even higher order terms of the field strength. This relationship is called nonlinear . Any optical phenomenon related to nonlinearity is called nonlinear optical phenomenon. Since Franken first discovered the crystal nonlinear optics (NLO) effect in 1961, NLO materials have been widely used in the optoelectronics industry, including optical communications, optical information processing, storage and holography, optical computers, laser weapons, laser p...

Claims

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Application Information

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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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