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A kind of double emission carbon nanomaterial, its preparation method and application

A carbon nanomaterial, dual emission technology, applied in the field of material science, can solve the problem of no luminescence, and achieve the effects of stable luminescence performance, good photobleaching performance and convenient operation

Active Publication Date: 2022-06-17
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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  • A kind of double emission carbon nanomaterial, its preparation method and application
  • A kind of double emission carbon nanomaterial, its preparation method and application
  • A kind of double emission carbon nanomaterial, its preparation method and application

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preparation example Construction

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

[0029] Under the condition of a pressure of 1.6-9.0 MPa, a uniformly mixed reaction system comprising a benzoic acid compound and a solvent is reacted at 200-300° C. to obtain a double-emitting carbon nanomaterial.

[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-emitting carbon nanomaterial.

[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 system comprises...

Embodiment 1

[0060] Example 1 The raw materials for the preparation of the dual emission carbon nanomaterials 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 dual-emission carbon nanomaterial of the present embodiment includes:

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

[0063] The solution A dispersion was placed in a stainless steel reaction kettle, and the high temperature heating reaction was carried out in a high temperature oven. The reaction temperature was 260 ° C, the reaction pressure was 5 MPa, and the reaction time was 12 h and then cooled to room temperature to obtain the initial product;

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

[0065] The obtained solution was centrifuged at high speed (1000 rpm) for 10 minutes ...

Embodiment 2

[0068] Embodiment 2 The preparation raw materials of the dual emission carbon nanomaterials in this embodiment 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 dual-emission carbon nanomaterial of the present embodiment includes:

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

[0071] The solution A dispersion was placed in a stainless steel reaction kettle, and the high temperature heating reaction was carried out in a high temperature oven. The reaction temperature was 220 ° C, the reaction pressure was 1.6 MPa, and the reaction time was 9 h and then cooled to room temperature to obtain the initial product;

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

[0073] The obtained solution was centrifuged at high speed (1000 rpm) for 10 minutes t...

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Abstract

The invention discloses a double emission carbon nanometer material, its preparation method and application. The preparation method comprises: under the condition of a pressure of 1.6-9.0 MPa, reacting a uniformly mixed reaction system including benzoic acid compounds and a solvent at 200-300° C. to obtain a double-emission carbon nanometer material. The dual-emission carbon nanomaterial of the present invention is excited by ultraviolet light at room temperature, and emits obvious white light through the joint action of fluorescence and room temperature phosphorescence, and its white light color coordinates are (0.26,0.28). Yellow phosphorescence visible to the naked eye. The double-emission carbon nanomaterial of the present invention has stable luminous performance, good acid and alkali corrosion resistance and photobleaching performance, and is aggregated by the material itself, effectively and stably excites the triplet state in a solid state and isolates the influence of oxygen, so that the double-emission carbon nanomaterial has Bright phosphorescence emission and stable white light emission, and the preparation process is simple and fast, and it is easy to realize industrial production.

Description

technical field [0001] The invention relates to a fluorescent and long-life room temperature phosphorescence dual emission material, and also relates to a carbon nanomaterial with fluorescence and room temperature phosphorescence dual emission to generate white light, a preparation method and application thereof, and belong to the field of material science. Background technique [0002] White light-emitting diodes (WLEDs) have become solid-state lighting devices with great development prospects due to their advantages of long service life, high energy utilization, energy saving and environmental protection. Therefore, the research and development of white light emitting materials is increasingly important. Today, it is generally accepted that white light emission arises from the mixed luminescence of multiple luminescent components with different colors. Compared with these multicomponent emitters, the single white light emitting material exhibits excellent luminescence prop...

Claims

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Application Information

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Patent Type & Authority Patents(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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