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Preparation method of graphite phase carbon nitride fluorescent powder with controllable fluorescence emission wavelength

A fluorescent emission and fluorescent powder technology, applied in chemical instruments and methods, nitrogen compounds, nitrogen and non-metallic compounds, etc., can solve the problems of low reserves of fluorescent powder materials, limited industrialization, unfriendly environment, etc., and achieve good fluorescent performance , controllable yield and low cost

Inactive Publication Date: 2022-06-07
NANJING UNIV
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  • Abstract
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Problems solved by technology

However, this kind of phosphor material still has problems such as low reserves, high toxicity, poor stability and unfriendly environment, which limit its further industrialization.

Method used

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  • Preparation method of graphite phase carbon nitride fluorescent powder with controllable fluorescence emission wavelength
  • Preparation method of graphite phase carbon nitride fluorescent powder with controllable fluorescence emission wavelength

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Embodiment 1

[0021] like figure 1 As shown, Embodiment 1 of the present invention includes:

[0022] Preparation process of graphitic carbon nitride phosphor with controllable emission wavelength:

[0023] (1) Preparation of graphite phase carbon nitride phosphor precursor

[0024] 1) melamine, cyanuric acid and 2,4,6-triaminopyrimidine or 0.5%, 1%, 0.5%, 1%, 5%, 10%, 20%, 30%, and 50% of barbituric acid were completely dissolved in deionized water at 60°C, respectively. The dissolved cyanuric acid was added dropwise to it, and the white precipitate of the precursor of the pyrimidine ring-coupled carazoxide ring was obtained by self-assembly through hydrogen bonds and then kept at 60°C for 24 hours. The above-mentioned precipitate was filtered with a 220nm filter process. , to obtain a white powder;

[0025] 2) Or cyanuric acid and barbituric acid are first mixed and stirred for 5 minutes, and then the completely dissolved melamine is added dropwise to it, and the pyrimidine ring-coupl...

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Abstract

The invention discloses a preparation method of graphite phase carbon nitride fluorescent powder with controllable fluorescence emission wavelength, which comprises the following steps: preparing 2, 4, 6-triaminopyrimidine coupled cyanuric acid and melamine self-assembled precursors in different proportions by using an intermolecular hydrogen bond self-assembly technology; and the precursor is subjected to high-temperature one-step calcination under the protection of argon to prepare the pyrimidine coupled carbon nitride fluorescent powder with controllable fluorescence emission wavelength and the like. The pyrimidine coupled carbon nitride fluorescent powder prepared by the method has a relatively large specific surface area, is simple and efficient to prepare, is controllable in yield, and is suitable for large-scale production and application. Importantly, the pyrimidine coupled carbon nitride fluorescent powder prepared by the method has the advantages of controllable fluorescence emission wavelength, environmental protection, low cost, good fluorescence performance and the like, and has huge development potential in the field of LEDs.

Description

technical field [0001] The invention relates to a preparation method of a graphitic carbon nitride fluorescent powder with controllable fluorescence emission wavelength, and relates to the fields of LED fluorescent powder, invisible printing materials and the like. [0002] technical background [0003] Currently, light-emitting diode (LED) phosphor materials are important materials for next-generation light-emitting devices. However, due to the high content of heavy metals in the current phosphors, the difficulty of large-scale production, and the high cost, their further applications in the future will be limited. LEDs are the choice for next-generation lighting due to their long lifespan, compact design and significant energy savings. At present, more and more phosphor materials such as perovskite quantum dots, rare earth metal phosphors, etc. are used to assemble LEDs, which have the outstanding advantages of low energy consumption, high brightness and high luminous effi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/65C01B21/082
CPCC09K11/65C01B21/0605Y02B20/00
Inventor 王毅庆贺兴臣
Owner NANJING UNIV
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