Silver@silver sulfide core-shell structure photothermal conversion nanometer material
A core-shell structure, photothermal conversion technology, applied in the direction of silver compounds, nanotechnology, silver compounds, etc., can solve the problems of complicated preparation process and so on
Inactive Publication Date: 2017-09-15
QINGDAO UNIV OF SCI & TECH
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Problems solved by technology
In order to obtain a broadened light absorption spectrum, it is necessary to prepare gold nanorods with different aspect ratios and mix them together, which complicates the preparation process.
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[0008] The silver@silver sulfide core-shell structure with graded shell thickness was prepared by the following steps:
[0009] (1) Put 5 milliliters of ethylene glycol in a 50 milliliter flask, stir and preheat it in an oil bath at 150°C for 1 hour, then add 1.25 milliliters of polyvinylpyrrolidone (PVP-55000) with a concentration of 20 milligrams per milliliter 10 minutes later, add 600 microliters of 3 mmol per liter of NaSH in ethylene glycol and stir and mix. After 3 minutes, add 0.5 ml of 3 mmol per liter of HCl Ethylene glycol solution and 0.4 mL of CF at a concentration of 282 mmol / L 3 The ethylene glycol solution of COOAg was stirred at 150°C for 1 hour to obtain a suspension of silver nanocubes of about 50 nm in size. The suspension was washed several times with acetone, absolute ethanol and deionized water and dispersed in 20 ml of deionized Reserve in water.
[0010] (2) At room temperature, add 10 milliliters of the aqueous solution of polyvinylpyrrolidone (PVP-...
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Abstract
The invention discloses a silver@silver sulfide core-shell structure photothermal conversion nanometer material. According to the core-shell structure photothermal conversion nanometer material, silver serves as a core, silver sulfide serves as a shell, and a nanometer core-shell structure with the shell thickness gradually changing is achieved. A silver nanocube is located in the middle of the core-shell structure, the surface is covered with a silver sulfide shell layer, and the positions, at the eight vertex angles, of the silver sulfide shell layer form hemispheroid shapes. The size of the silver cube is 50 nanometers, and the silver cube serves as the core of the core-shell structure. The thickness of the silver sulfide shell layer is gradually increased from the center to the vertex angles, the thickness of the center of the silver sulfide shell layer ranges from 5 nanometers to 10 nanometers, and the thickness of the silver sulfide hemispheroid at each vertex angle is 35 nanometers. The core-shell structure photothermal conversion nanometer material has good photothermal conversion performance within the wave band range of 300 nanometers to 1,200 nanometers, can be applied to different fields such as photothermal therapy and solar photothermal utilization and is a multifunctional photothermal conversion material.
Description
technical field [0001] The invention relates to the field of inorganic functional materials, in particular to a silver@silver sulfide core-shell structured light-to-heat conversion nanomaterial. Background technique [0002] Photothermal conversion materials can convert light energy into heat energy, so they have important application prospects in the fields of tumor photothermal therapy, photothermal imaging, solar photothermal utilization, and seawater desalination. The light absorption properties of light-to-heat conversion materials are crucial for their applications. For example, when photothermal conversion materials are applied in the field of biomedicine, they require strong absorption of near-infrared light, because near-infrared light can penetrate biological tissues without damaging normal cells. Conversely, in the field of solar thermal utilization, photothermal conversion materials are required to have strong absorption in the visible light region, because the ...
Claims
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IPC IPC(8): B22F1/00C01G5/00B22F9/16B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01G5/00B22F9/16C01P2006/60C01P2004/04C01P2004/03B22F1/0553B22F1/07B22F1/054
Inventor 吴大雄蒋茜曾文霞张灿英朱海涛
Owner QINGDAO UNIV OF SCI & TECH