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Method for preparing porous oxide molecular sieve using plant template

A technology of porous oxides and molecular sieves, which is applied in the preparation of porous materials and the field of inorganic ceramic materials. It can solve the problems of complex technical process and non-porous nickel oxide powder, and achieve the effect of simple process, low cost and concentrated pore size distribution.

Inactive Publication Date: 2005-03-02
SHANGHAI JIAO TONG UNIV
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

This technology can obtain nickel oxide powder with uniform particle size at the nanometer level, but the nickel oxide powder obtained by this technology does not have porous characteristics, and the technical process is relatively complicated

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Select the dry wood material—fir powder as the raw material, immerse it in ammonia water for 1 hour and then dry it, then immerse it in the aqueous solution of nickel nitrate for 1 hour and then dry it. After high temperature treatment, the porous nickel oxide (NiO) molecular sieve material with a pore size mainly distributed at 2nm can be obtained after heat preservation at 200°C for 10 hours, and has a good electromagnetic wave absorption effect in the range of 100MHZ-1.5GHZ.

Embodiment 2

[0022] Select the dry wood material—Paulownia powder as the raw material, and immerse it in ammonia water for 12 hours and then dry it, then immerse it in the aqueous solution of yttrium nitrate [Y(NO3)3] for 12 hours and then dry it. °C / min heating rate for high temperature treatment, after 5 hours of heat preservation at 700 °C, a porous yttrium oxide (Y2O3) molecular sieve material with a pore size mainly distributed at 26nm is obtained, which has a good absorption effect in the visible light range.

Embodiment 3

[0024] Select the dry wood material—white pine powder as the raw material, and immerse it in ammonia water for 24 hours and then dry it, then immerse it in the aqueous solution of zirconium nitrate [Zr(NO3)2] for 24 hours and then dry it. °C / min heating rate for high temperature treatment, after 1 hour of heat preservation at 1200 °C, a porous zirconia (ZrO2) molecular sieve material with a pore size mainly distributed at 50nm is obtained, which has a good ultraviolet shielding effect in the ultraviolet frequency range.

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PUM

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Abstract

The preparation process of porous oxide molecular sieve with plant template includes the following steps: soaking the selected plant material powder in ammonia water for 1-24 hr to deglue and drying; soaking the plant material powder in the water solution of strong acid salt of metal for 1-24 hr to pre-treat and drying; high temperature treating the plant material powder in oxidation atmosphere at 200-1200 deg.c for 1-10 hr at the temperature raising speed of 1-20 deg.c / min to obtain the porous oxide molecular sieve. The porous oxide molecular sieve MxOy has pore diameter in 2-50 nm, where, M is one of Ni, Fe, Co, Zn, Al and other seven kinds one metal, x is 1, 2 or 3, and y is 1, 2, 3 or 4. The present invention has the features of low cost, wide material source and simple technological process.

Description

technical field [0001] The invention relates to a method for preparing porous materials in the field of inorganic ceramic materials, in particular to a method for preparing porous oxide molecular sieves using plant templates. Background technique [0002] Oxide material powder can be widely used in the manufacture of magnetic materials, electronic component materials, coatings, ceramics and glass pigments, and raw materials for catalysts, and can exhibit unique infrared absorption, electromagnetic wave shielding and absorption depending on the type of oxide , UV shielding and other unique functions and functions. With the continuous development and maturity of oxide material preparation technology, people can prepare various types of oxides with different particle sizes, different components, and different structures. [0003] Through literature search, it is found that there are many literature reports around the preparation method of oxides, such as Chinese patent CN11125...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/00C04B38/00
Inventor 范同祥张荻刘兆婷
Owner SHANGHAI JIAO TONG UNIV
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