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Preparation method of silver/carbon quantum dot composite nanometer materials

A technology of composite nanomaterials and carbon quantum dots, which is applied in the field of preparation of silver/carbon quantum dots composite nanomaterials, can solve problems such as being unsuitable for large-scale production and difficult to separate products, and achieves good application prospects, good dispersibility, and particle size. Uniform effect

Active Publication Date: 2013-05-15
苏州市洁优卫生材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Recently, new developments have been made in carbon-based materials. Luminescent carbon quantum dots, which are similar to semiconductor quantum dots, have been used in the fields of biomarkers and life sciences due to their good optical properties, convenient synthesis, abundant raw materials, and low toxicity. ; Li et al. (Angewandte Chemie International Edition, 2010, 49(26): 4430-4434) synthesized a composite material of carbon quantum dots and titanium dioxide as a photocatalyst; Helena et al. (Biosensors and Bioelectronics, 2010, 26: 1302-1306) Prepared for the determination of Hg 2+ carbon quantum dot sensor; Shi et al. (Phys. Chem. Chem. Phys., 2012, 14, 7360-7366) prepared gold / carbon quantum dot composite nanomaterials for SERS, but the research group used gold The method of carbon quantum dots has the disadvantages that the products are difficult to separate and are not suitable for large-scale production

Method used

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  • Preparation method of silver/carbon quantum dot composite nanometer materials
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  • Preparation method of silver/carbon quantum dot composite nanometer materials

Examples

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Embodiment 1

[0017] Dissolve 0.1g PVP in 10mL distilled water, measure 5mL AgNO 3 (0.03mol / L) was added to the above PVP solution, and after stirring at room temperature for 10min, the prepared 10mL carbon quantum dot solution (0.1g / L) was added to the above mixture, and after stirring continuously for 20min, the reaction solution was transferred into 50mL In a hydrothermal kettle, put it in an electronic oven at 140°C, and react for 8 hours; after the reaction is completed, the product obtained is centrifuged, washed with distilled water and ethanol for several times, and dried in a vacuum oven.

Embodiment 2

[0019] Dissolve 0.1g PVP in 10mL distilled water, measure 5mL AgNO 3 (0.02mol / L) was added to the above PVP solution, and after stirring at room temperature for 10 minutes, the prepared 10ml carbon quantum dot solution (0.1g / L) was added to the above mixture, and after continuous stirring for 20 minutes, the reaction solution was transferred into 50mL In a hydrothermal kettle, put it in an electronic oven at 160°C, and react for 4 hours; after the reaction is completed, the product obtained is centrifuged, washed with distilled water and ethanol for several times, and dried in a vacuum oven.

Embodiment 3

[0021] Dissolve 0.1g PVP in 10mL distilled water, measure 5mL AgNO 3 (0.02mol / L) was added to the above PVP solution, and after stirring at room temperature for 10min, the prepared 10mL carbon quantum dot solution (0.1g / L) was added to the above mixture, and after stirring continuously for 20min, the reaction solution was transferred into 50mL In a hydrothermal kettle, put it in an electronic oven at 180°C, and react for 4 hours; after the reaction is completed, the product obtained is centrifuged, washed with distilled water and ethanol for several times, and dried in a vacuum oven.

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Abstract

The invention provides a preparation method of silver / carbon quantum dot composite nanometer materials. The specific preparation processes comprise the steps of adding a certain amount of silver nitrate solution to polyvinylpyrrolidone solution, adding a certain amount of carbon quantum dot solution to the polyvinylpyrrolidone solution, mixing for some time, transferring the solution into a reaction kettle, conducting a hydrothermal reaction at a certain temperature for some time, conducting centrifugal separation on a product, washing the product several times by using deionized water and ethanol, and obtaining the silver / carbon quantum dot composite nanometer materials after vacuum desiccation. The preparation method of the silver / carbon quantum dot composite nanometer materials is environment-friendly, high-efficient and easy to operate. Besides, the prepared silver / carbon quantum dot composite nanometer materials have good application prospects in the field of sensing, catalysis and the like.

Description

technical field [0001] The invention relates to a preparation method of a silver / carbon quantum dot composite nano material, especially a method with simple preparation process and low cost. technical background [0002] Metal nanoparticles have attracted increasing attention due to their unusual optical, electronic, and magnetic properties, as well as their potential applications in catalysis, information storage, biomarkers, and surface-enhanced Raman scattering (SERS) spectroscopy, among which Silver nanoparticles have become one of the most attractive nanomaterials due to their superconductivity and wide colorimetric effects, while anisotropic silver nanostructures (such as rods, wires, core-shell structures, etc.) Nonlinear optical properties and other aspects have unique application prospects; the synthesis of silver nanoparticles in aqueous phase is mainly carried out by hydrazine hydrate in the presence of stabilizers such as polyvinylpyrrolidone and cetyltrimethylam...

Claims

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Application Information

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IPC IPC(8): B22F9/24
Inventor 陈敏张元姜德立潘艾瞎吴柱东邢潮胜陈琳琳
Owner 苏州市洁优卫生材料科技有限公司
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