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Polyvinylpyrrolidone hybridized graphene catalyst carrier material and preparation method and application thereof

A technology of polyvinylpyrrolidone and catalyst carrier, which is applied in the direction of catalyst carrier, physical/chemical process catalyst, organic compound/hydride/coordination complex catalyst, etc., which can solve the problem that the dispersion and size of nano-metals cannot be effectively controlled and cannot be well To meet the needs of catalysts, acid resistance, weak alkali effect and other issues, to achieve the effect of avoiding agglomeration and shedding, uniform dispersion and size, and low production cost

Inactive Publication Date: 2013-02-06
HENAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, the preparation of graphene-supported metal nanoparticles is generally through the in-situ reduction method to directly combine the support and metal nanoclusters, which cannot well meet the industrial demand for catalysts.
The main technical problems are as follows: (1) graphene is easy to agglomerate, which reduces the specific surface area; (2) the dispersion and size of nano-metals on the surface of the carrier cannot be effectively controlled; (3) graphene has poor dispersion in solvents and low catalytic activity
However, the disadvantage of the method used in this patent is that the grafted polymer is not polyvinylpyrrolidone in a strict sense; in addition, this composite material is combined with graphene through the effect of ester group, and is resistant to acid and alkali. weak

Method used

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  • Polyvinylpyrrolidone hybridized graphene catalyst carrier material and preparation method and application thereof
  • Polyvinylpyrrolidone hybridized graphene catalyst carrier material and preparation method and application thereof
  • Polyvinylpyrrolidone hybridized graphene catalyst carrier material and preparation method and application thereof

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Embodiment 1

[0033] The polyvinylpyrrolidone hybrid graphene catalyst support material in this embodiment is covalently introduced polyvinylpyrrolidone on the surface of the graphene material.

[0034] The preparation method of this polyvinylpyrrolidone hybrid graphene catalyst carrier material comprises the following steps:

[0035] 1) Add 50g of graphite oxide into 2L of water, ultrasonically disperse for 1h, then adjust the pH of the solution to 4, add 15ml of vinyltrimethoxysilane under an inert atmosphere, and reflux for 24h to obtain a silane dioxide with a double bond at the end. Linked graphene oxide slurry;

[0036] 2) Dilute the obtained silane coupling modified graphene oxide slurry to 3 times with water, under an inert atmosphere, add 0.3L of tetrabutylammonium hydroxide aqueous solution with a mass fraction of 40%, 1L of hydrazine hydrate, and reflux for 10h Then stop the reaction, suction filter, wash to neutrality, and dry at room temperature to obtain a silane-coupled grap...

Embodiment 2

[0039]The polyvinylpyrrolidone hybrid graphene catalyst support material in this embodiment is covalently introduced polyvinylpyrrolidone on the surface of the graphene material.

[0040] The preparation method of this polyvinylpyrrolidone hybrid graphene catalyst carrier material comprises the following steps:

[0041] 1) Add 10g of graphite oxide to 1L of water, ultrasonically disperse for 1h, then adjust the pH value of the solution to 4.5, add 5ml of vinyltriethoxysilane under inert atmosphere conditions, and reflux for 12h to obtain Silane-coupled graphene oxide slurry;

[0042] 2) Dilute the obtained silane coupling modified graphene oxide slurry to 3 times with water, under an inert atmosphere, add 0.3L of tetrabutylammonium hydroxide aqueous solution with a mass fraction of 40%, 1L of hydrazine hydrate, and reflux for 10h Then stop the reaction, suction filter, wash to neutrality, and dry at room temperature to obtain a silane-coupled graphene powder whose end group i...

Embodiment 3

[0045] The polyvinylpyrrolidone hybrid graphene catalyst support material in this embodiment is covalently introduced polyvinylpyrrolidone on the surface of the graphene material.

[0046] The preparation method of this polyvinylpyrrolidone hybrid graphene catalyst carrier material comprises the following steps:

[0047] 1) Add 100g of graphite oxide to 3L of water, ultrasonically disperse for 1h, then adjust the pH of the solution to 5, add 20ml of γ-(methacryloyloxy)propyltrimethoxysilane under inert atmosphere conditions, and reflux for 48h , to obtain a silane-coupled graphene oxide slurry whose end group is a double bond;

[0048] 2) Dilute the obtained silane coupling modified graphene oxide slurry to 3 times with water, under an inert atmosphere, add 0.3L of tetrabutylammonium hydroxide aqueous solution with a mass fraction of 40%, 1L of hydrazine hydrate, and reflux for 10h Then stop the reaction, suction filter, wash to neutrality, and dry at room temperature to obta...

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Abstract

The invention discloses a polyvinylpyrrolidone hybridized graphene catalyst carrier material and a preparation method and application thereof. The material is prepared by covalently introducing polyvinylpyrrolidone to surfaces of a graphene material, and is particularly prepared by steps of 1), covalently anchording silane coupling agents on the surface of graphite oxide to obtain silane coupled graphene oxide slurry with double bonds as the end group; 2) adding tetrabutyl ammonium hydroxide solution and hydrazine hydrate, leaching and drying to obtain silane coupled graphene powder with double bonds as the end group; 3), adding the prepared powder, initiators, N-vinyl pyrrolidone into ethanol solvent, and drying at the normal temperature so as to obtain the polyvinylpyrrolidone hybridized graphene catalyst carrier material. The prepared polyvinylpyrrolidone hybridized graphene catalyst carrier material has the advantage of easiness in separation. After being loaded on the carrier material, catalysts are dispersed on the surfaces of carriers uniformly and are uniform in size, and cannot fall off or reunite during repeated use.

Description

technical field [0001] The invention belongs to the technical field of catalyst carrier materials, and in particular relates to a polyvinylpyrrolidone hybrid graphene catalyst carrier material, a preparation method and an application. Background technique [0002] Graphene is a new type of carbon material, which is a member of the carbon family with carbon nanotubes and fullerenes. It was obtained by stripping natural graphite by Geim in England in 2004. Graphene has a regular two-dimensional surface structure, and its special single atomic layer structure determines its rich and novel physical properties. Graphene has good thermal and chemical stability, good mechanical strength and electrical conductivity, and large specific surface area, so it is an ideal catalyst support material. However, the current research on graphene mainly focuses on the controllable preparation of graphene and its physical properties, and there are relatively few studies on its chemical propertie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L51/10C08F292/00C08F226/10B01J32/00B01J31/28C01B3/06
CPCY02E60/36
Inventor 彭淑鸽樊昕洁罗洁吴云骥
Owner HENAN UNIV OF SCI & TECH
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