Preparation method of salt nano-particles

A technology of nanoparticles and inorganic salts, applied in the field of nanoparticles, can solve problems such as inability to obtain salt nanoparticles, and achieve the effects of low cost, high purity and fast speed

Active Publication Date: 2019-01-18
SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the problem that salt nanoparticles below 6nm cannot be obtained in the abov

Method used

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  • Preparation method of salt nano-particles

Examples

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Embodiment 1

[0023] (1) Sample preparation: NaNO 3 The powder is placed in a quartz crucible and heated on a heating table. At the same time, freshly dissociated highly oriented pyrolytic graphite (Highly Oriented Pyrolytic Graphite, HOPG) was placed on a heating table for heating. Adjust the temperature of the heating table to 400 ° C, and use an infrared thermometer to measure NaNO in the crucible 3 The temperature, which is 319.2°C, is lower than that of NaNO 3 Decomposition temperature, heating makes NaNO 3 Gradually melts into a liquid state.

[0024] (2) Preparation of nanoparticles: Dip the molten salt with a glass rod, drop it on the HOPG, and after a brief contact for 1-5 seconds, use the glass rod to drive the molten salt droplet to move to the surface in contact with the molten salt droplet away from the HOPG, The molten salt droplets are removed from the HOPG, and the HOPG is allowed to cool. Atomic force microscopy (AFM) was used to observe the existing forms of inorganic...

Embodiment 2

[0026] (1) Sample preparation: firing nitrate mixed salt (LiNO 3 -NaNO 3 -KNO 3 -Ca(NO 3 ) 2 -CsNO 3 , 8-6-23-19-44wt.%), the mixed salt is placed in a quartz crucible, placed on a heating table for heating. At the same time, freshly dissociated HOPG was placed on a heating platform for heating. Adjust the temperature of the heating table to 500°C, and heat to gradually melt the mixed salt into a liquid state.

[0027] (2) Preparation of nanoparticles: Dip the molten salt with a glass rod, drop it on the HOPG, and after a brief contact for 1-5 seconds, tilt the HOPG to remove the molten salt drop from the HOPG, and then cool the HOPG. Use atomic force microscope (AFM) to observe the existence form of the mixed salt retained on the surface of HOPG, such as figure 2 As shown, the mixed salt nanoparticles of nitrate range in size from a few nanometers to a few micrometers.

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Abstract

The invention relates to a preparation method of salt nano-particles. The preparation method comprises the following steps of putting inorganic salt of a solid in a vessel, and providing a basement with a smooth surface; regulating a temperature of a heating device to be higher than a melting point of the inorganic salt and lower than a decomposition temperature of the inorganic salt, and heatingthe vessel and the basement with the heating dvice to enable the solid inorganic salt to be molten into a molten liquid state; and dipping the molten inorganic salt with a rod body which is not reacted with the molten inorganic salt, dripping the molten inorganic salt on the basement, into which the molten inorganic salt does not infiltrate, then removing droplets of the molten inorganic salt fromthe basement, and performing cooling to obtain inorganic salt nano-particles on the surface of the basement. In the preparation method provided by the invention, by using a melting-cooling method toprepare the salt nano-particles, the salt nano-particles with the particle size being between several nanometers and several micrometers can be obtained; and particularly, through the preparation method provided by the invention, the salt nano-particles with the size being 6nm or below can be obtained, so that the preparation method exploits a new measure of preparation of small-particle size saltnano-particles.

Description

technical field [0001] The present invention relates to nanoparticles, more specifically to a method for preparing salt nanoparticles. Background technique [0002] With the deepening and development of scientific exploration from the macroscopic to the microscopic, materials at the nanoscale exhibit many physical and chemical properties that are different from those at the macroscale. The preparation of nanoparticles and the study of their properties play a very important role in the understanding of the reaction mechanism of materials at the nanoscale and the development of new materials and technologies. Atmospheric aerosol particle size refers to the particle size of 1nm-100um, solid and liquid particle system suspended in the air, which has a very important impact on climate and environmental changes and human health. Inorganic salts such as nitrate, sulfate, and sea salt are important components of aerosols. Their hygroscopic properties are the bridge and link connect...

Claims

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Application Information

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IPC IPC(8): C01D9/18B82Y30/00
CPCB82Y30/00C01D9/18C01P2002/80C01P2004/04C01P2004/64
Inventor 闫隆汪颖周玉莹胡钧阴慧琴
Owner SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
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