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A kind of preparation method of salt nanoparticles

A technology of nanoparticles and inorganic salts, applied in the field of nanoparticles, can solve problems such as inability to obtain salt nanoparticles

Active Publication Date: 2021-04-23
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 above-mentioned prior art, the present invention aims to provide a method for preparing salt nanoparticles

Method used

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  • A kind of preparation method of salt nanoparticles
  • A kind of preparation method of salt nanoparticles
  • A kind of preparation method of salt nanoparticles

Examples

Experimental program
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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 were removed from the HOPG, and the HOPG was allowed to cool. Atomic force microscopy (AFM) was used to observe the existing forms of inorgan...

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 nanoparticles, comprising placing solid inorganic salt in a container to provide a substrate with a flat surface; adjusting the temperature of a heating device to be higher than the melting point of the inorganic salt and lower than the decomposition temperature of the inorganic salt , the container and the base are heated by the heating device, so that the solid inorganic salt melts into a molten liquid state; the molten inorganic salt is dipped with a stick that does not react with the molten inorganic salt, and dropped on a surface that is not infiltrated with the molten inorganic salt. The molten inorganic salt droplets are then removed from the substrate and cooled to obtain inorganic salt nanoparticles on the surface of the substrate. The present invention prepares salt nanoparticles through a melting-cooling method, thereby obtaining salt nanoparticles with particle diameters between several nanometers and several micrometers. In particular, salt nanoparticles with a size below 6 nm can be obtained through the preparation method of the present invention. Therefore, the present invention opens up new means for the preparation of small-sized salt nanoparticles.

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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Patent Type & Authority Patents(China)
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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