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Dual-emission carbon nano material and preparation method and application thereof

A carbon nanomaterial and dual-emission technology, applied in the field of material science, can solve problems such as not having luminescence

Active Publication Date: 2020-10-30
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the room-temperature phosphorescent emission wavelength of carbon quantum dots is currently limited to the green band, and most carbon quantum dots do not have luminescence in the case of solid-state aggregation.

Method used

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  • Dual-emission carbon nano material and preparation method and application thereof
  • Dual-emission carbon nano material and preparation method and application thereof
  • Dual-emission carbon nano material and preparation method and application thereof

Examples

Experimental program
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preparation example Construction

[0028] An aspect of the embodiments of the present invention provides a method for preparing a double-emission carbon nanomaterial (also referred to as carbon quantum dots, referred to as carbon dots), which includes:

[0029] Under the condition of a pressure of 1.6-9.0 MPa, the uniformly mixed reaction system comprising benzoic acid compounds and solvents is reacted at 200-300° C. to obtain double-emission carbon nanometer materials.

[0030] In some embodiments, the preparation method specifically includes:

[0031] Disperse the benzoic acid compound evenly in the solvent to form a transparent, stable and uniform reaction system;

[0032] The reaction system is rapidly heated to 200-300° C. and reacted under the condition of a pressure of 1.6-9.0 MPa, followed by purification treatment to obtain the double-emission carbon nanometer material.

[0033] In some embodiments, the mass ratio of the benzoic acid compound to the solvent is 1:25-1:150, that is, the uniform reaction...

Embodiment 1

[0060] Example 1 The raw materials for the preparation of the dual-emission carbon nanomaterial in this example include the following materials calculated in parts by weight: 15 parts of trimellitic acid and 1000 parts of water.

[0061] The preparation method of the double emission carbon nanomaterial of the present embodiment comprises:

[0062] After dispersing 15 parts of trimellitic acid in 1000 parts of water, ultrasonically disperse completely to obtain the solution A dispersion;

[0063] Put the solution A dispersion in a stainless steel reaction kettle, and carry out high-temperature heating reaction in a high-temperature oven. The reaction temperature is 260 ° C, the reaction pressure is 5 MPa, and the reaction time is 12 hours. After cooling to room temperature, the initial product is obtained;

[0064] Add appropriate amount of water to disperse the initial product;

[0065] After the obtained solution was centrifuged at high speed (1000 rpm) for 10 minutes, the p...

Embodiment 2

[0068] Example 2 The raw materials for the preparation of the dual-emission carbon nanomaterial in this example include the following materials calculated in parts by weight: 15 parts of trimellitic acid and 1000 parts of water.

[0069] The preparation method of the double emission carbon nanomaterial of the present embodiment comprises:

[0070] After dispersing 15 parts of trimellitic acid in 1000 parts of water, ultrasonically disperse completely to obtain the solution A dispersion;

[0071] Put the solution A dispersion in a stainless steel reaction kettle, and conduct a high-temperature heating reaction in a high-temperature oven. The reaction temperature is 220 ° C, the reaction pressure is 1.6 MPa, and the reaction time is 9 hours. After cooling to room temperature, the initial product is obtained;

[0072] Add appropriate amount of water to disperse the initial product;

[0073] After the obtained solution was centrifuged at high speed (1000 rpm) for 10 minutes, the ...

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Abstract

The invention discloses a dual-emission carbon nano material and a preparation method and application thereof. The preparation method comprises the following steps: under the condition that the pressure is 1.6-9.0 MPa, enabling a uniformly mixed reaction system containing benzoic acid compounds and a solvent to react at 200-300 DEG C to obtain the dual-emission carbon nano material. The dual-emission carbon nanomaterial is excited by ultraviolet light in a room-temperature environment, obvious white light is emitted under the combined action of fluorescence and room-temperature phosphorescence, the color coordinate of the white light is (0.26, 0.28), and yellow phosphorescence which can be distinguished by naked eyes can be emitted after ultraviolet light excitation is stopped. The dual-emission carbon nano material disclosed by the invention is stable in light-emitting performance; the dual-emission carbon nano material is good in acid and alkali corrosion resistance and photobleaching performance, can effectively and stably excite a triplet state and isolate the influence of oxygen in a solid state due to self aggregation of the material, has bright phosphorescence emission and stable white light emission, and is simple and rapid in preparation process and easy to realize industrial production.

Description

technical field [0001] The invention relates to a fluorescent and long-life room-temperature phosphorescent double-emission material, and at the same time relates to a carbon nanomaterial capable of generating white light by double-emitting fluorescent and room-temperature phosphorescent light, its preparation method and application, and belongs to the field of material science. Background technique [0002] White light emitting diode (WLED) has become a solid-state lighting device with great development prospects due to its long service life, high energy utilization rate, energy saving and environmental protection. Therefore, the research and development of white light emitting materials is becoming increasingly important. Today, it is generally accepted that white light emission comes from the mixed emission of multiple luminescent components with different colors. Compared with these multicomponent emitters, single white light-emitting materials exhibit excellent luminesc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/65C01B32/15B82Y20/00B82Y40/00
CPCC09K11/65C01B32/15B82Y20/00B82Y40/00C01P2002/01C01P2002/82Y02B20/00
Inventor 林恒伟高晓路蒋凯孙山唐中迪钱四化
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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