Biomimetic synthesis of two-dimensional porous silica nanomaterials

A technology of porous silicon oxide and nanomaterials, applied in the direction of silicon dioxide, silicon oxide, chemical instruments and methods, etc., to achieve the effect of fewer types, high adsorption performance and thermal stability, and low price

Active Publication Date: 2019-02-01
SUZHOU UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] According to the literature search of the existing technology, no domestic patent reports have been found on the preparation of two-dimensional nanoporous materials, and there are few reports on the synthesis of two-dimensional porous silica materials in the world. We are the first to use simple impregnation and infiltration By replicating the tissue structure of plant petals, a two-dimensional porous silicon oxide nanosheet material with a thickness of about 2.7 nanometers was obtained.

Method used

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  • Biomimetic synthesis of two-dimensional porous silica nanomaterials
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  • Biomimetic synthesis of two-dimensional porous silica nanomaterials

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Embodiment 1

[0023] The biomimetic synthesis of two-dimensional porous silicon oxide nanomaterials comprises the following steps:

[0024] Step 1: Collect camellia petals, wash the petals with clean water, soak them in ethanol aqueous solution (volume ratio 1:1) adjusted to pH 3 with hydrochloric acid for one week, take them out, wash them with deionized water, and then use the same Soak in ethanol aqueous solution with a pH of 3 for one week, rinse it with deionized water repeatedly after taking it out, and dry it in a dark place;

[0025] Step 2: Prepare a solution with tetraethyl orthosilicate as the silicon source and 200 mL of absolute ethanol. The concentration of the silicon source in the solution is 0.01 mol / L. Immerse the pretreated plant petals in the solution, and take out after 72 hours for immersion Permeation products;

[0026] The third step: wash the product with ethanol aqueous solution first, then wash with deionized water, repeat 3 times, and dry in the shade, first hea...

Embodiment 2

[0030] The biomimetic synthesis of two-dimensional porous silicon oxide nanomaterials comprises the following steps:

[0031] Step 1: Collect camellia petals, wash the petals with clean water, soak them in ethanol aqueous solution (volume ratio 1:1) adjusted to pH 3 with hydrochloric acid for one week, take them out, wash them with deionized water, and then use the same Soak in ethanol aqueous solution with a pH of 3 for one week, rinse it with deionized water repeatedly after taking it out, and dry it in a dark place;

[0032] Step 2: Prepare a solution with tetraethyl orthosilicate as the silicon source and 200 mL of absolute ethanol. The concentration of the silicon source in the solution is 0.05 mol / L. Immerse the pretreated plant petals in the solution, take out and soak after 72 hours Permeation products;

[0033] The third step: wash the product with ethanol aqueous solution first, then wash with deionized water, repeat 3 times, and dry in the shade, first heat up to 2...

Embodiment 3

[0041] The biomimetic synthesis of two-dimensional porous silicon oxide nanomaterials comprises the following steps:

[0042] Step 1: Collect camellia petals, wash the petals with clean water, soak them in ethanol aqueous solution (volume ratio 1:1) adjusted to pH 3 with hydrochloric acid for one week, take them out, wash them with deionized water, and then use the same Soak in ethanol aqueous solution with a pH of 3 for one week, rinse it with deionized water repeatedly after taking it out, and dry it in a dark place;

[0043] Step 2: Prepare a solution with tetraethyl orthosilicate as the silicon source and 200 mL of absolute ethanol. The concentration of the silicon source in the solution is 0.10 mol / L. Immerse the pretreated plant petals in the solution, and take out after 72 hours for immersion Permeation products;

[0044] The third step: wash the product with ethanol aqueous solution first, then wash with deionized water, repeat 3 times, and dry in the shade, first hea...

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Abstract

The invention provides a biomimetic synthesis method of a two-dimensional porous silicon oxide nano material. The biomimetic synthesis method comprises the following steps: firstly, collecting plant petals with a natural flake structure and carrying out pretreatment; secondly, preparing a solution from tetraethoxysilane and absolute ethanol, impregnating the pretreated plant petals into the solution and enabling the petals to make full contact with the solution; thirdly, taking out an impregnated product, cleaning, drying, carrying out muffle calcination and natural cooling, and taking to obtain the two-dimensional porous silicon oxide nanomaterial. The biomimetic synthesis method of the two-dimensional porous silicon oxide nano material, provided by the invention, has the advantages that no complex equipment are needed by reaction, fewer kinds of chemical raw materials are required, and the price is low; petal templates have the characteristics of wide sources, renewability, easiness in removal, no pollution to the environment and good experiment reproducibility; in addition, the prepared material has higher adsorption property and thermal stability and can be used for effectively adsorbing organic dye waste water when being applied for carrying out purification treatment on the organic dye waste water.

Description

technical field [0001] The invention relates to the biomimetic synthesis of two-dimensional porous silicon oxide nanomaterials. Background technique [0002] Porous silica materials have the advantages of large specific surface area, high pore volume, good thermal stability, low cost, non-toxicity and simple synthesis, and have shown great potential in applications such as adsorption, catalysis, environmental protection, and drug delivery. potential. The synthesis of traditional porous silica materials usually uses some surfactants as soft templates or structure-directing agents to build void structures. Therefore, the morphology of porous silica materials can be controlled by controlling the reaction conditions or adding organic and inorganic additives, and various shapes such as rods, fibers, spheres and polyhedrons can be obtained. Most of the morphology control of porous silica is in the three-dimensional space scale, and there is no report on the synthesis of two-dime...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B33/18C02F1/28C02F101/30C02F103/30
CPCC01B33/18C01P2004/03C01P2004/04C02F1/281C02F2101/308C02F2103/30
Inventor 吴正颖陈志刚刘成宝陈丰崔如玉钱君超
Owner SUZHOU UNIV OF SCI & TECH
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