Carboxyl-containing carbon quantum dot solution emitting green fluorescence and preparation method thereof

A technology of carbon quantum dots and green fluorescence, applied in the field of quantum dot luminescence, can solve the problems of high cost, single emitted light, complex synthesis process, etc., and achieve low cost, high fluorescence quantum efficiency, and good monochromatic performance

Inactive Publication Date: 2016-02-24
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention aims to solve the problems that organic fluorescent molecules can only absorb incident light of a fixed frequency and emit single light, and the synthesis process of existing organic green light-emitting materials is complex and costly, so as to provide a carboxyl-containing carbon quantum dot solution that emits green fluorescence and its preparation method

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  • Carboxyl-containing carbon quantum dot solution emitting green fluorescence and preparation method thereof
  • Carboxyl-containing carbon quantum dot solution emitting green fluorescence and preparation method thereof
  • Carboxyl-containing carbon quantum dot solution emitting green fluorescence and preparation method thereof

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specific Embodiment approach 1

[0015] Specific implementation mode one: refer to Figure 1 to Figure 3 Specifically illustrate this embodiment, the preparation method of the carboxyl-containing carbon quantum dot solution that emits green fluorescence described in this embodiment, the method includes the following steps:

[0016] Step 1. Dissolving 1mmol~4mmol maleic anhydride, 1mmol~4mmol m-phenylenediamine, 0.001mmol~0.004mmol erbium nitrate and 0.01mmol~0.04mmol ytterbium nitrate in 10mL~15mL absolute ethanol to obtain a mixed solution, Then the mixed solution is packed into a polytetrafluoroethylene reactor;

[0017] Step 2. Ultrasonic the reactor in step 1 for 10-30 minutes, then stir the mixed solution for 10-30 minutes;

[0018] Step 3, put the reaction kettle in step 2 into a steel kettle, place the steel kettle in an environment with a temperature of 180°C to 200°C for 3h to 5h, then cool it down to room temperature naturally, and take out the reactants;

[0019] Step 4: Filter the reactant obtai...

specific Embodiment approach 2

[0021] Specific embodiment two: This embodiment is to further illustrate the preparation method of the green fluorescent carboxyl-containing carbon quantum dot solution described in specific embodiment one. In this embodiment, the polytetrafluoroethylene reaction kettle described in step one The volume is 20mL.

specific Embodiment approach 3

[0022] Specific embodiment three: This embodiment is to further illustrate the preparation method of the carboxyl-containing carbon quantum dot solution that emits green fluorescence described in specific embodiment one. In this embodiment, the maleic anhydride described in step one and The substance molar ratio of m-phenylenediamine is 1:1.

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Abstract

The invention discloses a crboxyl-containing carbon quantum dot solution emitting green fluorescence and a preparation method thereof, which relates to the technical field of light emitting of quantum dots. The invention is designed for solving the problems that organic fluorescent molecules only can absorb incident light with a fixed frequency and emit single light, and the existing organic green light-emitting materials are complex in synthesis process and high in cost. Maleic anhydride, m-phenylenediamine, erbium nitrate and ytterbium nitrate are dissolved in anhydrous ethanol, and then the obtained object is put into a polytetrafluoroethylene reaction kettle; after being subjected to ultrasonic treatment, the materials above are stirred; the reaction kettle is put into a steel kettle, after the reaction kettle is heated and then naturally cooled to room temperature, a reactant is taken out; and after the reactant is filtered, a carboxyl-containing carbon quantum dot solution emitting green fluorescence is obtained. The method disclosed by the invention is simple in process, easy to operate, low in cost and high in yield. The carbon quantum dot solution obtained according to the invention is high in fluorescence quantum efficiency and strong in stability, and can realize the simultaneous detection of multiple components. The quantum dot solution disclosed by the invention is suitable for being used as a fluorescent material, and the method is applicable to the preparation of carbon quantum dot solutions emitting green fluorescence.

Description

technical field [0001] The invention relates to the technical field of quantum dot luminescence. Background technique [0002] As we all know, nanomaterials have a scale of 1nm-100nm, and compared with traditional bulk materials, they have many special effects, such as surface effect, small size effect, quantum size effect and macroscopic quantum tunneling effect. Therefore, the use of nano-materials can improve their electrical, optical, mechanical, catalytic and other properties. Semiconductor quantum dots are a very typical class of nanomaterials, which are semiconductor particles with a particle size smaller than or close to the exciton Bohr radius, and have unique optical and electrical properties. Semiconductor quantum dots such as CdS, CdSe, CdTe, PbS, and PbTe have high luminous emission intensity, and their excellent labor light characteristics make them widely used in the fields of biology and medicine, such as biosensors, living cell labeling, in vivo Or in vitr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/65C09K11/02C09K11/00B82Y20/00B82Y40/00
CPCC09K11/65B82Y20/00B82Y40/00C09K11/00C09K11/025
Inventor 杨玉林石岩范瑞清王平
Owner HARBIN INST OF TECH
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