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Preparation method of graphene oxide quantum dot based on photocatalytic oxidation

A technology of graphene quantum dots and photocatalytic oxidation, which is applied in the direction of nanotechnology, can solve the problems of high equipment requirements and low efficiency, and achieve the effect of simple system and convenient and fast preparation method

Active Publication Date: 2012-02-01
上海碳源汇谷新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method is inefficient and requires high equipment

Method used

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  • Preparation method of graphene oxide quantum dot based on photocatalytic oxidation
  • Preparation method of graphene oxide quantum dot based on photocatalytic oxidation
  • Preparation method of graphene oxide quantum dot based on photocatalytic oxidation

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Embodiment 1

[0024] Using the graphene oxide aqueous solution synthesized by the Hummers method as the starting material, the Photo-Fenton reaction is used, that is, the H 2 o 2 as an oxidizing agent, Fe 3+ As a catalyst, graphene oxide quantum dots are prepared under ultraviolet light radiation, which specifically includes the following steps:

[0025] (1) Dispersing graphite oxide in deionized water, dispersing it for 1h under the action of ultrasound with a working frequency of 40kHz and a power of 160W, dispersing and peeling graphite oxide into a single layer to obtain a monolayer graphene oxide aqueous solution;

[0026] (2) A single-layer graphene oxide aqueous solution with a concentration of 0.01 mg / mL, 10 mM H 2 o 2 The aqueous solution was mixed and stirred at room temperature with a volume ratio of 5:20 to obtain a mixed solution. The mixed solution was photocatalytically oxidized for 10 h with a UV lamp with a power of 100 W and a dominant wavelength of 365 nm to prepare gr...

Embodiment 2

[0028] Using the graphene oxide aqueous solution synthesized by the Hummers method as the starting material, the Photo-Fenton reaction is used, that is, the H 2 o 2 as an oxidizing agent, Fe 3+ As a catalyst, graphene oxide quantum dots are prepared under ultraviolet light radiation, which specifically includes the following steps:

[0029] (1) Dispersing graphite oxide in deionized water, dispersing it for 1h under the action of ultrasound with a working frequency of 40kHz and a power of 160W, dispersing and peeling graphite oxide into a single layer to obtain a monolayer graphene oxide aqueous solution;

[0030] (2) A single-layer graphene oxide aqueous solution with a concentration of 0.1 mg / mL, 100 mM H 2 o 2 aqueous solution and 1.0 x 10 -3 The ferric sulfate solution of M is mixed and stirred at room temperature at a volume ratio of 5:20:0.05 to obtain a mixed solution. The mixed solution is photocatalytically oxidized for 6 hours with a UV lamp with a power of 300W ...

Embodiment 3

[0032] Using the graphene oxide aqueous solution synthesized by the Hummers method as the starting material, the Photo-Fenton reaction is used, that is, the H 2 o 2 as an oxidizing agent, Fe 3+ As a catalyst, graphene oxide quantum dots are prepared under ultraviolet light radiation, which specifically includes the following steps:

[0033] (1) Dispersing graphite oxide in deionized water, dispersing it for 1h under the action of ultrasound with a working frequency of 40kHz and a power of 160W, dispersing and peeling graphite oxide into a single layer to obtain a monolayer graphene oxide aqueous solution;

[0034] (2) A single-layer graphene oxide aqueous solution with a concentration of 0.5 mg / mL, 200 mM H 2 o 2 aqueous solution and 1.0 x 10 -3 The ferric chloride solution of M is mixed and stirred at room temperature at a volume ratio of 5:20:0.2 to obtain a mixed solution, and the mixed solution is photocatalytically oxidized for 3 hours with an ultraviolet lamp with a ...

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Abstract

The invention relates to a preparation method of graphene oxide quantum dot based on photocatalytic oxidation. In the method, graphite oxide is dispersed in deionized water, under the act of ultrasonic, and the graphite oxide is stripped and dispersed into single layers so as to prepare a graphene oxide aqueous solution. The oxidant H2O2 and the catalyst Fe3+ are added in the graphene oxide solution, the mixture is stirred at room temperature, and simultaneously, the ultraviolet light radiates on the mixture system to prepare the graphene oxide quantum dot. In comparison with the prior art, the preparation method provided by the invention has the advantage of being simple and efficient in preparation process, simple in system and capable of preparing the graphene oxide quantum dots with uniform size.

Description

technical field [0001] The invention relates to a preparation method of nano-material graphene oxide quantum dots, in particular to a preparation method of graphene oxide quantum dots based on photocatalytic oxidation. Background technique [0002] Graphene, because of its unique monoatomic layer two-dimensional crystal structure and excellent electrical, thermal and mechanical properties, has broad application prospects in the fields of composite materials, energy storage materials, solar cells, sensors and biomedicine. The applications of graphene in the biological field mainly include DNA analysis, protein detection, and drug delivery. As a new material in the field of biological applications, graphene should have good water solubility and biocompatibility, as well as a suitable two-dimensional size for its transport in biological systems. Graphene oxide quantum dots, that is, graphene with a large number of oxygen-containing functional groups on the surface and a two-di...

Claims

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Application Information

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IPC IPC(8): C01B31/04B82Y40/00
Inventor 郭守武周雪皎
Owner 上海碳源汇谷新材料科技有限公司
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