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Porous silicon material and preparation method of porous silicon material

A technology for porous silicon and raw materials, which is applied in chemical instruments and methods, silicon compounds, inorganic chemistry, etc., can solve the problems of high production cost of porous silicon materials, polluting industrial production, complicated processes, etc., and achieves low production cost and uniform pore size. , the effect of simple process

Inactive Publication Date: 2014-12-24
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to propose a new type of porous silicon material and its preparation method, to solve the problems of high production cost, complex process, serious pollution and difficulty in industrial production of porous silicon materials, and to separate and obtain alkane while preparing porous silicon materials. Oxysilane

Method used

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  • Porous silicon material and preparation method of porous silicon material
  • Porous silicon material and preparation method of porous silicon material
  • Porous silicon material and preparation method of porous silicon material

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Embodiment 1

[0051] 10 grams of commercially purchased silicon fume raw materials (particle size range 10-100 microns) were mixed with commercially purchased powdered Cu 2 10 grams of O material (as a solid copper-based catalyst, particle size range 0.2-30 microns) is mixed and ground evenly, then put into a hydrothermal reaction kettle, add 40mL of ethanol, heat up to 120°C, and react for 18 hours, then cool to room temperature, the reaction process The gaseous products in the process become alkoxysilanes after condensation, which can be separated into chemicals by rectification in the later stage, and unreacted ethanol can be recycled. The solid residue after the reaction contains silicon and solid copper-based catalyst, sonicated in concentrated nitric acid at 90°C for 4 hours, washed repeatedly with deionized water 5 times to remove the copper-based catalyst, and then stirred and reacted in sodium hydroxide solution for 24 hours , repeatedly washed with deionized water 5 times to remov...

Embodiment 2

[0060] Mix and grind 10 grams of commercially purchased silicon powder raw materials (10-100 microns in particle size range) and 5 grams of commercially purchased powdered Cu (as a copper-based catalyst, 1-5 microns in particle size range) and put them into an autoclave, add 20mL of ethanol, heated to 320°C, reacted for 48 hours, then cooled to room temperature, the gaseous product in the reaction process will become alkoxysilane after condensation, which can be separated into chemicals by rectification in the later stage, and the unreacted ethanol can be recycled. The solid residue after the reaction contains silicon and solid copper-based catalyst, sonicated in concentrated nitric acid at 90°C for 4 hours, washed repeatedly with deionized water 5 times to remove the copper-based catalyst, and then stirred and reacted in sodium hydroxide solution for 24 hours , washed repeatedly with deionized water 5 times to remove the silicon dioxide on the surface of the porous silicon, an...

Embodiment 3

[0063] Mix 20 grams of commercially purchased silicon powder raw materials (1-20 microns in particle size range) with commercially purchased gelatinous Cu-Cu 2 3 grams of O-CuCl material (as a copper-based catalyst, particle size range 0.1-10.0 microns) is mixed and ground evenly and then loaded into a fixed-bed reactor, and the carrier gas high-purity nitrogen (gas velocity is 50mL / min) is passed into 100ml of ethanol Liquid bottle, bring ethanol gas into the fixed bed reactor, under normal pressure, after preheating, heat up to 300°C, react for 3 hours, cool to room temperature, the gaseous product in the reaction process will become alkoxysilane after condensation , which can be separated into chemicals by rectification in the later stage, and unreacted ethanol can be recycled. The solid residue after the reaction contains silicon and solid copper-based catalyst, sonicated in concentrated nitric acid at 90°C for 4 hours, washed repeatedly with deionized water 5 times to rem...

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Abstract

The invention provides a porous silicon material and a preparation method of the porous silicon material. The preparation method of the porous silicon material comprises the following steps: carrying out in-situ catalytic reaction on silicon and alcohol at 60-400 DEG C under the action of a solid copper-based catalyst, and preparing the porous silicon material by post-treatment and purification technologies such as burning, and pickling and alkali washing. The porous silicon material prepared by the method is uniform in aperture, and the pore structure, size and porosity of silicon can be regulated and controlled by adjusting reaction parameters. The method is low in production cost, simple in process, easy to operate, clean in preparation process, and suitable for industrial production, and has a wide application prospect. In addition, the process can be combined with an alkoxy silane production process, and the process is expected to achieve double-win of porous silicon material and alkoxy silane production.

Description

technical field [0001] The invention relates to the technical field of porous silicon materials, in particular to a porous silicon material and a preparation method thereof. Background technique [0002] Porous silicon is a new functional porous material with a pore size ranging from nanometers to millimeters. Due to its unique dielectric properties, optical properties, microelectronic compatibility, large specific surface area and pore controllability, it is widely used in biological analysis, Immunoassays, lighting materials, optoelectronic devices, integrated circuits, insulating materials, sensitive components and sensors, solar cells and lithium-ion batteries have a wide range of applications. Porous silicon is a new type of semiconductor optoelectronic material, which has excellent photoluminescence, electroluminescence and other characteristics at room temperature, and is compatible with existing silicon technology, and it is very likely to realize applications in man...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/021B01J23/72
Inventor 苏发兵任文锋张在磊王艳红
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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