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Indium oxide film material modified with aluminum oxide-coated palladium nanoparticles and its preparation method and application

A technology of palladium nanoparticles and thin-film materials, applied in the direction of material resistance, etc., can solve the problems of inability to realize selective identification of ethanol gas and inability to obtain products, and achieve the effects of improved gas sensing performance, reasonable structure, and scientific preparation methods

Inactive Publication Date: 2017-12-22
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The product whose phase of each layer is indium oxide has a strong response to ammonia, ethanol, acetone, carbon monoxide, methane and other gases, but it cannot achieve selectivity to ethanol gas in actual detection applications. identify
In addition, its preparation method can not obtain the product that selectively recognizes ethanol gas

Method used

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  • Indium oxide film material modified with aluminum oxide-coated palladium nanoparticles and its preparation method and application
  • Indium oxide film material modified with aluminum oxide-coated palladium nanoparticles and its preparation method and application
  • Indium oxide film material modified with aluminum oxide-coated palladium nanoparticles and its preparation method and application

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The concrete steps of preparation are:

[0041] Step 1, first pick up the single-layer colloidal ball template floating in the indium nitrate solution and then heat it to obtain a single-layer colloidal ball template solidified with indium nitrate; wherein, the colloidal balls forming the single-layer colloidal ball template have a ball diameter of 1000nm polystyrene colloidal balls. Then place the single-layer colloidal ball template solidified with indium nitrate at 300° C. for annealing to obtain a single-layer porous indium oxide film.

[0042]Step 2, first place the palladium target in a stirred 0.01mol / L aluminum nitrate solution; wherein, the aluminum nitrate solution is an aqueous aluminum nitrate solution. Then use a laser with a wavelength of 532nm (or 1064nm), a repetition rate of 1Hz, a pulse width of 15ns, and a power of 40mJ / pulse to irradiate the palladium target for 18 minutes; wherein, the diameter of the laser spot is 0.5mm, and the emission wavelengt...

Embodiment 2

[0045] The concrete steps of preparation are:

[0046] Step 1, first pick up the single-layer colloidal ball template floating in the indium nitrate solution and then heat it to obtain a single-layer colloidal ball template solidified with indium nitrate; wherein, the colloidal balls forming the single-layer colloidal ball template have a ball diameter of 1000nm polystyrene colloidal balls. Then place the single-layer colloidal ball template solidified with indium nitrate at 325° C. for annealing to obtain a single-layer porous indium oxide film.

[0047] Step 2, first place the palladium target in a stirred 0.05 mol / L aluminum nitrate solution; wherein, the aluminum nitrate solution is an aqueous aluminum nitrate solution. Then use a laser with a wavelength of 532nm (or 1064nm), a repetition rate of 5Hz, a pulse width of 12.5ns, and a power of 60mJ / pulse to irradiate the palladium target for 14min; wherein, the laser spot diameter is 1mm, and the emission wavelength is 532nm...

Embodiment 3

[0050] The concrete steps of preparation are:

[0051] Step 1, first pick up the single-layer colloidal ball template floating in the indium nitrate solution and then heat it to obtain a single-layer colloidal ball template solidified with indium nitrate; wherein, the colloidal balls forming the single-layer colloidal ball template have a ball diameter of 1000nm polystyrene colloidal balls. Then place the single-layer colloidal ball template solidified with indium nitrate at 350° C. for annealing to obtain a single-layer porous indium oxide film.

[0052] Step 2, first place the palladium target in a 0.2 mol / L aluminum nitrate solution under stirring; wherein, the aluminum nitrate solution is an aqueous aluminum nitrate solution. Then use a laser with a wavelength of 532nm (or 1064nm), a repetition rate of 10Hz, a pulse width of 10ns, and a power of 80mJ / pulse to irradiate the palladium target for 9 minutes; wherein, the laser spot diameter is 1.5mm, and the emission waveleng...

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Abstract

The invention discloses an indium oxide thin-film material modified with aluminium oxide-coated palladium nanoparticles and a preparation method and an application thereof. according to the material, an indium oxide monolayer porous thin-film is modified with 1-100 micrograms / cm<2> of aluminium oxide-coated palladium nanoparticles, wherein pore diameter of the porous thin-film is 50-5000 nm; film thickness is 10-5000 nm; particle size of the aluminium oxide-coated palladium nanoparticles is 12-160 nm; layer thickness of aluminium oxide is 1-30 nm; and particle size of palladium particles is 10-100 nm. according to the method, the indium oxide monolayer porous thin-film is firstly obtained by an in-situ growth method; then, a palladium target is placed into an aluminium nitrate solution, and the palladium target is irradiated by the use of laser at wavelength of 532 nm or 1064 nm so as to obtain a mixed colloidal solution; afterwards, the mixed colloidal solution undergoes solid-liquid separation and washing; the obtained aluminium oxide-coated palladium nanoparticles are dispersed in ethanol, and the indium oxide monolayer porous thin-film is coated with the above solution obtained so as to prepare a target product. The product can be widely used in fields of selective detection of ethanol gas and gas sensing.

Description

technical field [0001] The invention relates to a thin film material, a preparation method and use thereof, in particular to an indium oxide thin film material modified with aluminum oxide-coated palladium nanoparticles, a preparation method and use thereof. Background technique [0002] Alcohol detection plays a very important role in the fields of industrial production, food safety, traffic safety and public health. Especially efficient portable alcohol detectors have always been in great demand in practical applications such as drunk driving detection. Traditional alcohol detection methods mainly include gas chromatography, infrared spectroscopy and electrochemical methods, all of which have defects such as low sensitivity, high detection limit, high working temperature, and long response time. In recent years, in order to overcome these defects, people have made some beneficial attempts and efforts, such as the Chinese invention patent CN 101435795 B announced on Decembe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B41/88G01N27/04
CPCC04B41/009C04B41/5183C04B41/88G01N27/04C04B35/01C04B41/4539
Inventor 王莹莹张洪文蔡伟平
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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