Method for preparing hollow/mesoporous nano structure material by adjusting Kirkendall effect through magnetic field

A nanostructure and magnetic field modulation technology, applied in the nano field, can solve problems such as increasing the cost of commercial preparation, and achieve the effect of reducing the cost of reaction preparation, huge benefit value and saving energy.

Active Publication Date: 2017-11-28
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

By combining this technology called Kirkendalls (K) with other techniques like sonicators or solvent extraction methods, it allows for faster production of mesoporous material that has multiple inner cavities inside itself through rapid diffusion processes between different shells without requiring expensive equipment such as vacuum chambers.

Problems solved by technology

The technical problem addressed in this patented text relates to improving methods for producing porous or meso structures from low-temperature reactions at room temperatures while also simplifying their manufacturing procedures.

Method used

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  • Method for preparing hollow/mesoporous nano structure material by adjusting Kirkendall effect through magnetic field
  • Method for preparing hollow/mesoporous nano structure material by adjusting Kirkendall effect through magnetic field
  • Method for preparing hollow/mesoporous nano structure material by adjusting Kirkendall effect through magnetic field

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Embodiment

[0024] First, silicon nanoparticles are partially oxidized in a tube furnace at 800°C under an air atmosphere to form a thin oxide layer on the surface of silicon nanoparticles, and the partially oxidized silicon nanoparticles are obtained as precursors for hydrothermal reactions. Then, the partially oxidized silicon nanoparticles are uniformly dispersed in deionized water by ultrasonic treatment, added into a stainless steel autoclave with a polytetrafluoroethylene substrate, sealed after packaging, and then the stainless steel autoclave is put into a heater Finally, the heater equipped with a stainless steel autoclave was placed in a steady-state magnetic field at 1T for a hydrothermal reaction at 180°C for 5 hours, and the same precursor solution was prepared and reacted for 5 hours and 24 hours respectively without a magnetic field. TEM test was carried out, and the results were as follows image 3 shown.

[0025] image 3 is a transmission electron microscope (TEM) pict...

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Abstract

The invention discloses a method for preparing a hollow/mesoporous nano structure material by adjusting the Kirkendall effect through a magnetic field. In the process that a hollow/mesoporous nano structure material is prepared through the Kirkendall effect, a hydrothermal reaction step is implemented under an external magnetic field condition. Due to an external magnetic field, the time that a solid nano structure material is transformed into the hollow/mesoporous nano structure material is greatly shortened at a relatively low temperature by virtue of the Kirkendall effect, so that great benefit values are made since the reaction preparation cost is reduced, and current development themes of energy conservation and environment protection are met.

Description

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Claims

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Application Information

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Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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