CN111484843A - Composite nano-particle for enhancing full-spectrum absorption characteristic of sunlight - Google Patents

Composite nano-particle for enhancing full-spectrum absorption characteristic of sunlight Download PDF

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Publication number
CN111484843A
CN111484843A CN202010107664.3A CN202010107664A CN111484843A CN 111484843 A CN111484843 A CN 111484843A CN 202010107664 A CN202010107664 A CN 202010107664A CN 111484843 A CN111484843 A CN 111484843A
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composite
composite nano
enhancing
absorption
sunlight
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侍晓云
李佳玉
杨振宇
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Nanjing University of Science and Technology
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Nanjing University of Science and Technology
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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
    • C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
    • C09K11/60—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing iron, cobalt or nickel
    • C09K11/607—Silicates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y40/00—Manufacture or treatment of nanostructures
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
    • C09K11/02—Use of particular materials as binders, particle coatings or suspension media therefor
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
    • C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
    • C09K11/60—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing iron, cobalt or nickel
    • C09K11/602—Chalcogenides

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  • Engineering & Computer Science (AREA)
  • Nanotechnology (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Physics & Mathematics (AREA)
  • Inorganic Chemistry (AREA)
  • Composite Materials (AREA)
  • Manufacturing & Machinery (AREA)
  • Silicon Compounds (AREA)

Abstract

The invention discloses a composite nanoparticle for enhancing the absorption characteristic of a solar full spectrum body, in particular to a Fe3O4@ SiO2@ Au composite nanoparticle; the composite nano-particles are formed by combining spherical shells made of different materials, and can excite local surface plasmons on a plurality of surfaces, so that the composite nano-particles have a good absorption effect under a solar spectrum with a wide waveband; the composite nano-particle has high absorption efficiency in the wavelength range of 300 nm-1000 nm where solar spectrum energy is concentrated, has a simple structure, is easy to process, and can be used for improving the photo-thermal conversion efficiency.

Description

Composite nano-particle for enhancing full-spectrum absorption characteristic of sunlight
Technical Field
The invention belongs to the technical field of solar energy, and particularly relates to a composite nanoparticle for enhancing the absorption characteristic of a solar full spectrum body.
Background
The ever decreasing fossil energy and the contradiction between severe environmental changes and ever increasing energy demand forces people to find and develop renewable energy. Solar energy has the advantages of low cost, no pollution and high safety, is particularly widely applied to research and application in the fields of nano fluid enhanced heat transfer, energy conversion and the like, can find a nano particle structure with good full spectrum light absorption and good heat transfer performance, becomes more important, and can simultaneously increase the light absorption rate and the heat transfer performance of a flowing working medium. In recent years, research and application of composite nanoparticles in the field of photothermal conversion have been advanced, and the problems of large radiation heat loss and optical loss in traditional solar energy application are alleviated to a certain extent. However, the composite nanoparticles in current research and application mostly have better absorption characteristics only in a narrower wavelength band, resulting in low efficiency of photothermal conversion.
Disclosure of Invention
In order to overcome the technical problem that nanoparticles adopted by a solar photo-thermal conversion working medium in the prior art have a good extinction effect only in a narrow wave band, so that the photo-thermal conversion efficiency is not high, the invention provides the composite nanoparticles for enhancing the full-spectrum absorption characteristic of solar energy.
A composite nanoparticle that enhances the full spectrum bulk absorption properties of solar energy: fe3O4@ SiO2@ Au composite nanoparticles; the method comprises the following steps: nanospheres, spherical shells 1 and spherical shells 2; wherein, the nanosphere 1 and the spherical shell 2 are made of an absorbing medium material, and the spherical shell 1 is made of a non-absorbing transparent medium material.
Wherein, the radius of the nanosphere is 10-50 nm, and the thicknesses of the spherical shell 1 and the spherical shell 2 are respectively 5-12 nm. The material of the nanospheres is Fe3O4, the material of the spherical shell 1 is SiO2, and the material of the spherical shell 2 is Au.
Compared with the prior art, the composite nano-particles with the solar full-spectrum absorption characteristic have the following advantages:
1. the composite nano-particles are formed by combining spherical shells made of different materials, and can excite local surface plasmons on a plurality of surfaces, so that the composite nano-particles have a good absorption effect under a solar spectrum with a wide waveband;
2. the composite nano-particle has high absorption efficiency in the wavelength range of 300 nm-1000 nm where solar spectrum energy is concentrated, has a simple structure, is easy to process, and can be used for improving the photo-thermal conversion efficiency.
Drawings
FIG. 1 is a schematic representation of a 30nmFe3O4@12nm SiO2@10nmAu spherical composite nanoparticle.
FIG. 2 shows 30nmFe3O4@12nmSiO2@10nmAu spherical composite nanoparticle absorption factor spectrogram.
FIG. 3 is a schematic diagram of the Poynting vector integral of the 30nmFe3O4@12nmSiO2@10nmAu spherical composite nanoparticle boundary.
FIG. 4 is a graph of the steady state temperature distribution of a 30nmFe3O4@12nm SiO2@10nmAu tri-layer composite nanoparticle.
Detailed Description
The invention will be further explained with reference to the drawings
The scheme of the invention is to solve the influence of different structural parameters on radiation absorption and heat generation of the composite nano-particles through research, and calculate the parameter change rule of the radiation absorption characteristic and the heat generation characteristic of the composite nano-particles, thereby obtaining the composite nano-particles capable of enhancing the full-spectrum absorption of sunlight.
Composite nanoparticles with full solar spectrum bulk absorption properties: fe3O4@ SiO2@ Au composite nanoparticles; the method comprises the following steps: nanospheres, spherical shells 1 and spherical shells 2; wherein, the nanosphere 1 and the spherical shell 2 are made of an absorbing medium material, and the spherical shell 1 is made of a non-absorbing transparent medium material.
Wherein, the radius of the nanosphere is 10-50 nm, and the thicknesses of the spherical shell 1 and the spherical shell 2 are respectively 5-12 nm. The material of the nanospheres is Fe3O4, the material of the spherical shell 1 is SiO2, and the material of the spherical shell 2 is Au.
The structural parameters of this type of particles have the following characteristics: 1. the metal layer sequence: the two absorbent media layers are not adjacent; the medium Au with strong absorptivity is arranged on the outermost layer of the particles to enhance absorption; the medium Fe3O4 with weaker absorption is placed in an inner core for peak regulation; 2. the transparent medium layer sequence: the transparent medium layer is arranged in the inner layer of the particles; 3. shell layer thickness: the thicknesses of the SiO2 shell of the intermediate layer and the Au shell of the outermost layer are used for controlling the strength of plasmon coupling of the Au shell.
With Fe3O4@SiO2The @ Au composite nano-particles are researched and calculated, the physical model is shown in figure 1, and Fe3O4Radius 30nm, SiO2A shell thickness of12nm and a Au shell thickness of 10nm, the dimensional change of the whole particle was controlled by varying the shell thickness d (5/8/10/12 nm).
The radiation absorption of the composite nanoparticle is characterized by the absorption factor, ponyting vector integral, and the heat generation characteristics are characterized by the temperature profile.
According to the absorption factor spectrogram (a physical model is shown in figure 1, and a numerical simulation result is shown in figure 2) of Fe3O4@ SiO2@ Au composite nanoparticles with different shell thicknesses, the absorption factor of the nanoparticles numerically simulates the change relation of the absorption factor of Fe3O4@ SiO2@ Au composite nanoparticles with different thicknesses of SiO2 layers along with the wavelength, the composite nanoparticle physical model is shown in figure 1, and the numerical simulation result is shown in figure 2, and it can be seen from the graph result that the nanoparticles can respectively see two obvious absorption peaks at 480nm (hereinafter referred to as a short-wave peak) of visible light and near 750nm (hereinafter referred to as a long-wave peak), the stable and smooth absorption factor spectrum condition of Fe3O4 is found to be beneficial to the fact that the three-layer composite nanoparticles still maintain high absorption at the transition stage of the two wave peaks, and the transition wave band in the structure is near 900nm, this is precisely the range of the solar spectrum in which the spectral irradiance is relatively high.
The energy exchange value occurring at the grain outermost surface boundary can be obtained from the Poynting vector integration of the resistance heat at the grain boundary, as shown in fig. 3.
Calculating to obtain Fe3O4@SiO2The overall absorption factor 1.4630 for the @ Au composite nanoparticle.
According to Fe3O4@SiO2The temperature distribution of the @ Au composite nanoparticles in a steady state under full-spectrum irradiation is shown in FIG. 4. The steady-state temperature distribution of the particles under the irradiation of 300-1000nm sunlight is calculated and plotted, as shown in FIG. 4. As can be seen from the figure, the temperature inside the particles is almost uniformly distributed, and the maximum temperature reaches 301.22K.

Claims (4)

1. The composite nanoparticle for enhancing the full-spectrum absorption characteristic of sunlight is characterized by comprising Fe3O4@ SiO2@ Au composite nanoparticles; the method comprises the following steps: nanospheres, spherical shells 1 and spherical shells 2; wherein, the nanosphere 1 and the spherical shell 2 are made of an absorbing medium material, and the spherical shell 1 is made of a non-absorbing transparent medium material.
2. The composite nanoparticle for enhancing the full spectrum absorption characteristics of sunlight according to claim 1, wherein the radius of said nanosphere is 10-50 nm.
3. The composite nanoparticle for enhancing the full spectrum absorption characteristic of sunlight according to claim 1, wherein the thicknesses of said spherical shell 1 and said spherical shell 2 are 5 to 12nm, respectively.
4. The composite nanoparticle for enhancing the full spectrum absorption properties of sunlight according to claim 1, wherein the material of said nanospheres is Fe3O4The material of the spherical shell 1 is SiO2, and the material of the spherical shell 2 is Au.
CN202010107664.3A 2020-02-21 2020-02-21 Composite nano-particle for enhancing full-spectrum absorption characteristic of sunlight Pending CN111484843A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113145170A (en) * 2020-12-31 2021-07-23 东北电力大学 Preparation method of visible light full-absorption saturated phosphomolybdate composite material with Keggin structure

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102568728A (en) * 2012-02-07 2012-07-11 东南大学 Preparation method of low-fluorescent-background assembled gold magnetic composite nanometer particles and application thereof
CN102764618A (en) * 2012-07-09 2012-11-07 东南大学 Method for preparing three-layer core-shell structural gold magnetic nano particles
CN104668580A (en) * 2015-03-06 2015-06-03 天津大学 Preparation of ferroferric oxide/gold nanometer composite material and method for rapidly detecting rhodamine molecules by using ferroferric oxide/gold nanometer composite material
CN105223183A (en) * 2015-09-18 2016-01-06 中国科学院生态环境研究中心 A kind of substrate that can be used for zwitterion pigment selective enumeration method
CN107309436A (en) * 2017-05-16 2017-11-03 浙江工业大学 A kind of golden magnetic nano particle and preparation method and application
CN110530842A (en) * 2019-08-09 2019-12-03 温州大学 Fe3O4@SiO2The preparation method and applications of/Au NPs particle

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102568728A (en) * 2012-02-07 2012-07-11 东南大学 Preparation method of low-fluorescent-background assembled gold magnetic composite nanometer particles and application thereof
CN102764618A (en) * 2012-07-09 2012-11-07 东南大学 Method for preparing three-layer core-shell structural gold magnetic nano particles
CN104668580A (en) * 2015-03-06 2015-06-03 天津大学 Preparation of ferroferric oxide/gold nanometer composite material and method for rapidly detecting rhodamine molecules by using ferroferric oxide/gold nanometer composite material
CN105223183A (en) * 2015-09-18 2016-01-06 中国科学院生态环境研究中心 A kind of substrate that can be used for zwitterion pigment selective enumeration method
CN107309436A (en) * 2017-05-16 2017-11-03 浙江工业大学 A kind of golden magnetic nano particle and preparation method and application
CN110530842A (en) * 2019-08-09 2019-12-03 温州大学 Fe3O4@SiO2The preparation method and applications of/Au NPs particle

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113145170A (en) * 2020-12-31 2021-07-23 东北电力大学 Preparation method of visible light full-absorption saturated phosphomolybdate composite material with Keggin structure

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