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Highly dispersed graphene sheet composite material regularly modified by metal nanodot and in-situ preparation method

A technology of metal nano and graphene sheets, applied in the direction of graphene, nano carbon, non-metallic elements, etc., can solve the problems of size, regularity, density control, etc., and achieve the effect of small dispersion and good dispersion

Active Publication Date: 2014-02-26
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method usually links pre-prepared metal nanoparticles to graphene sheets, but the size, regularity, and density of metal nanoparticles cannot be effectively controlled for the in-situ generation of metal nanoparticles on graphene sheets.

Method used

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  • Highly dispersed graphene sheet composite material regularly modified by metal nanodot and in-situ preparation method
  • Highly dispersed graphene sheet composite material regularly modified by metal nanodot and in-situ preparation method
  • Highly dispersed graphene sheet composite material regularly modified by metal nanodot and in-situ preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) The steps of the preparation method of N,N'-di(2-mercaptoethyl)peryleneimide derivative molecule containing mercapto group are as follows:

[0033] (a) Add 1 part by weight of 3,4,9,10-perylenetetracarboxylic dianhydride, 0.5 part by weight of mercaptoamine molecules and 1 part by weight of anhydrous zinc acetate into 10 mL of quinoline, and stir at 100 ° C under the protection of N2 Reaction for 3 hours;

[0034] (b) adding the reaction solution to 500 mL of dehydrated ethanol for precipitation, collecting the filter residue by filtration, washing the filter residue 3 times with a 5% sodium hydroxide solution by weight percentage concentration, and filtering until the filtrate is colorless;

[0035] (c) The filter residue was washed with deionized water until the pH value of the filtrate became neutral, and dried in a vacuum oven at 70°C to obtain N,N'-bis(2-mercaptoethyl)peryleneimide molecules.

[0036] (2) Preparation of N,N'-bis(2-mercaptoethyl)peryleneimide m...

Embodiment 2

[0042] (1) The steps of the preparation method of N,N'-di(2-mercaptoethyl)peryleneimide derivative molecule containing mercapto group are as follows:

[0043] a) 1 part by weight of 3,4,9,10-perylenetetracarboxylic dianhydride, 1 part by weight of 2-mercaptoethylamine and 1 part by weight of anhydrous zinc acetate were added to 20 mL of quinoline, and stirred at 150 °C under the protection of N2 Reaction for 12 hours;

[0044] b) Add the reaction solution to 1000mL of absolute ethanol for precipitation, collect the filter residue by filtration, wash the filter residue with 10% sodium hydroxide solution by weight for 5 times, and filter until the filtrate is colorless;

[0045] c) The filter residue was washed with deionized water until the pH value of the filtrate became neutral, and dried in a vacuum oven at 70°C to obtain N,N'-bis(2-mercaptoethyl)peryleneimide molecules.

[0046] (2) Preparation of N,N'-bis(2-mercaptoethyl)peryleneimide molecularly modified graphene sheets: ...

Embodiment 3

[0052] (1) The steps of the preparation method of N,N'-bis(2-mercaptododecyl)perylimide containing mercapto group are as follows:

[0053] Except that the raw material uses mercaptododecylamine instead of thioglycolic acid, other experimental procedures are the same as in Example 1.

[0054] (2) Preparation of N,N'-bis(2-mercaptododecyl)peryleneimide molecularly modified graphene sheets: In addition to the reaction raw materials, use N,N'-bis(2-mercaptododecyl)perylene The experimental procedure is the same as in Example 1 except that imide is used instead of N,N'-bis(2-mercaptoethyl)peryleneimide.

[0055] (3) Preparation of gold nanodot-modified graphene sheet: the experimental procedure is the same as in Example 1. The transmission electron microscope confirmed that the aqueous solution of the graphene sheet nanocomposite material regularly decorated with gold nanodots was obtained with high dispersion.

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Abstract

The invention discloses a highly dispersed graphene sheet composite material regularly modified by a metal nanodot and an in-situ preparation method of the graphene sheet composite material. A metal nanodot-modified graphene sheet nanocomposite material comprises nanographene sheets and a metal nanodot for modifying surfaces of the nanographene sheets. The preparation method comprises the following steps of: self-assembling a sulfydryl-containing perylene bisimide derivative molecule to the surface of a graphene oxide sheet, and introducing sulfydryl; reducing the sulfydryl-modified graphene oxide sheet to obtain a sulfydryl-modified graphene oxide sheet; and adding a positive metal salt, and reducing at a sulfydryl site of the surface of the graphene sheet, and generating the metal nanodot and obtain a metal nanodot-modified graphene sheet nanocomposite material. The metal nanodot-modified graphene sheet nanocomposite material obtained by the invention has the advantages of good aqueous solution dispersibility, excellent electrochemical activity and broad application prospect in the fields, such as nanocatalysis, electrochemical sensing and the like.

Description

technical field [0001] The invention relates to a composite and a preparation method, in particular to a highly dispersed graphene sheet composite material regularly decorated with metal nano-dots and an in-situ preparation method. Background technique [0002] Graphene can already be produced in batches and at low cost by chemical methods such as reduction from graphene oxide. In this method, graphene oxide can be obtained by oxidizing and exfoliating graphite crystals, and then reduced by reducing agent, heat, and electrochemical reaction to obtain graphene (reduced graphene oxide). Graphene's unique two-dimensional planar structure and outstanding electrical, optical, mechanical, and chemical properties make it a potential class of atomic-scale templates for the construction of new graphene-based nanocomposites. For example, after the graphene sheet is modified by metal nanoparticles, its inherent various properties can be moderately adjusted to suit its applications in ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/00C01B31/04C01B32/184C01B32/194
Inventor 陈红征杨曦徐明生
Owner ZHEJIANG UNIV
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