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Preparation method of recyclable cellulose paper base nano-silver catalyst materials and application of materials

A catalytic material and cellulose technology, applied in the field of nanomaterials, can solve the problems of low mechanical strength of cellulose paper-based materials, easy disintegration of porous paper-based macrostructures, and catalyst falling off, and achieves good reusability and reduction method. Simple, enhanced interaction effects

Active Publication Date: 2017-09-22
ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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Problems solved by technology

Most of the methods described in the above documents or patents use physical adsorption or electrostatic force between the silver nanoparticles and the surface of the cellulose material to fix the nanomaterials. The binding force is not strong, and the catalyst is easy to fall off from the surface of the carrier in the catalytic reaction system; Moreover, the mechanical strength of the original cellulose paper base material is not high, and the macroscopic structure of the porous paper base is easy to collapse after absorbing water.

Method used

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  • Preparation method of recyclable cellulose paper base nano-silver catalyst materials and application of materials

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preparation example Construction

[0032] The preparation method of the recyclable cellulose paper-based nano-silver catalytic material, the steps are as follows:

[0033] (1) Surface functionalization of cellulose paper-based materials: Dissolve the silane coupling agent in the ethanol / water system, stir and disperse to obtain a silane coupling agent solution, and immerse the cellulose paper-based material into the silane coupling agent solution , react for 1-4 hours, take out the cellulose paper-based material after the reaction, place it in an oven at 110-130°C for activation for 2-4 hours, wash the activated cellulose paper-based material with water and ethanol, and dry at room temperature. Obtain the cellulose paper-based material I with surface amino functionalization;

[0034] (2) Adsorption of silver nano-precursor ions: immerse the cellulose paper base material I in the silver nano-precursor solution, incubate at a constant temperature of 25-40°C for 0.5-2 hours, and then wash with water to remove excess...

Embodiment 1

[0048] 1. Surface functionalization of cellulose paper: using ordinary cellulose filter paper (CFP) in the laboratory as the carrier of silver nanomaterials, using silane coupling reagents to modify the surface with amino groups to enhance its ability to chelate and adsorb metal ions .

[0049] Dissolve 40mg of 3-aminopropyltrimethoxysilane in 100mL of ethanol / water system (70 / 30, v / v), and stir to disperse; take cellulose paper-based laboratory filter paper, and cut it into suitable The size of the rectangle, immersed in the above system, reacted for 4 hours.

[0050] Take out the cellulose filter paper and place it in an oven at 130 °C for 4 hours to activate the hydroxyl groups on the surface of the cellulose to form amino groups; wash the activated filter paper with water and ethanol respectively, and vacuum-dry at room temperature to obtain the cellulose filter paper with surface amino functionalization.

[0051] 2. Surface functionalized paper chelates and adsorbs metal...

Embodiment 2

[0059] 1. Surface functionalization of cellulose paper: use laboratory printing paper as the carrier of silver nanomaterials, and use silane coupling reagents to modify the surface with amino groups to enhance its ability to chelate and adsorb metal ions.

[0060] Dissolve 250mg of 3-aminopropyltriethoxysilane in 100mL of ethanol / water system (70 / 30, v / v), and stir to disperse; take printing paper and cut it into a circle of suitable size, immerse in In the above system, react for 2.5 hours.

[0061] Take out the printing paper and place it in an oven at 110°C for 2 hours to activate the surface hydroxyl group of the cellulose on the printing paper to form an amino group; wash the activated printing paper with water and ethanol respectively, and dry it in vacuum at room temperature to obtain the cellulose with amino functionalized surface printer paper.

[0062] 2. Surface functionalized paper chelates and adsorbs metal precursor ions: the chelation between the lone pair of e...

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Abstract

The invention belongs to the technical field of nano-materials, and relates to a preparation method of recyclable supported nano-silver catalyst materials and an application of the materials, in particular to a silver nano-catalyst preparation method based on surface-functionalization cellulose paper base and application of the preparation method to circular catalysis and transformation of environmental pollutants. The preparation method of the recyclable cellulose paper base nano-silver catalyst materials includes the steps: taking cellulose paper base materials as a support; performing amino modification on support surfaces by the aid of silane coupling agents; enabling amino of the modified support surfaces and metal precursor ions to chelate; adding reducing agents to reduce to form the cellulose paper base nano-silver catalyst materials. The prepared cellulose paper base nano-silver catalyst materials serve as a catalyst to reduce 4-aminophenol by the aid of 4-nitrophenol, are high in catalytic activity and good in reusable performance and still keep higher catalytic activity when continually and circularly being used by 20 times or more, support stability and silver nano-stability are high, and catalysts are easily recycled.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials, and relates to a preparation method and application of a recyclable loaded nano-silver catalytic material, in particular to a preparation method of a silver nano-catalyst based on surface functionalized cellulose paper base and its cyclic catalysis Applications that transform environmental pollutants. Background technique [0002] Metal nanomaterials have broad application prospects in the fields of energy, catalysis, biomedicine, and sensing and detection, and have become a hot spot in international research. Among them, noble metal nanomaterials such as gold, silver, and platinum have excellent catalytic properties due to their high specific surface area and unique surface electronic properties, and have shown high performance in hydrogenation reduction, coupling reactions, and catalytic oxidation reactions. catalytic activity. However, free noble metal nanoparticles are prone to agglom...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/06B01J35/04C07C213/02C07C215/76
CPCC07C213/02B01J31/06B01J35/56C07C215/76Y02P20/584
Inventor 梁淼张果侯佩张峻松王建民
Owner ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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