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A kind of inorganic photoluminescent material with adjustable fluorescence spectrum and preparation method thereof

A photoluminescent material, inorganic technology, applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve the problems of low luminous efficiency of materials, complicated preparation process, many reaction steps, etc., achieve high luminous intensity, simple production method, easy The effect obtained

Active Publication Date: 2019-05-21
THE QUARTERMASTER EQUIPMENT RESEARCH INSTITUTE OF THE GENERAL LOGISITIC DEPARTME
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The Chinese invention patent application with the application number 201310097837.8 discloses a preparation method of BCNO phosphor with a wide excitation and emission spectrum. It uses melamine, boric acid and ethylene glycol as raw materials to prepare BCNO phosphor, but the reaction time is longer, and the obtained The luminous efficiency of the material is low; the Chinese invention patent with the application number of 201410724748.6 and the Chinese invention patent with the application number of 201410719862.X respectively disclose a preparation method of BCNO phosphors with adjustable emission of orange-red light and red light. The preparation method has many reaction steps and the preparation process is relatively complicated

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  • A kind of inorganic photoluminescent material with adjustable fluorescence spectrum and preparation method thereof
  • A kind of inorganic photoluminescent material with adjustable fluorescence spectrum and preparation method thereof

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Embodiment 1

[0027] The inorganic photoluminescence material of this embodiment is produced by microwave reaction of citric acid, boric acid and urea through two-step method, and the obtained product is gray-white powder. Element composition is: carbon element 6wt%, boron element 34wt%, nitrogen element 19wt%, oxygen element 41wt%, wherein carbon element is the few-layer graphene sheet that citric acid is decomposed and reduced (see figure 1 ).

[0028] The preparation method of the inorganic photoluminescent material of this embodiment comprises the following steps:

[0029] (1) Raw material preparation: Weigh 0.02 g of citric acid (a few-layer graphene sheet formed by decomposing and reducing citric acid, see the document Carbon, 2012, 50(12): 4738-4743.), 0.5 g of boric acid and Urea 5.5g, that is, the mass ratio of boric acid to urea is 1:11; the mass ratio of the total mass of boric acid and urea to citric acid is 300:1

[0030] (2) Preparation of citric acid solution: dissolving th...

Embodiment 2

[0035] The inorganic photoluminescent material of this example is produced by reacting citric acid, boric acid and urea through two-step microwave heating method, and the obtained product is gray-white powder. Element composition is: carbon element 5wt%, boron element 40wt%, nitrogen element 21wt%, oxygen element 34wt%, wherein carbon element is the few-layer graphene sheet that citric acid is decomposed and reduced (see figure 2 ).

[0036] Compared with the preparation method of the inorganic photoluminescent material in Example 1, the inorganic photoluminescent material of this embodiment, the mass ratio of boric acid and urea is 1:5, and the mass ratio of the total mass of boric acid and urea to citric acid is 150 :1. In the step (4), react for 3 minutes under the power condition of 800W, and the citric acid is decomposed and reduced to graphene. The obtained substance was mixed with boric acid and urea solution, reacted for 25 minutes under the condition of 800W power,...

Embodiment 3

[0039] The inorganic photoluminescent material of this example is produced by reacting citric acid, boric acid and urea through two-step microwave heating method, and the obtained product is gray powder. The element composition is: 12wt% of carbon element, 27wt% of boron element, 26wt% of nitrogen element, and 35wt% of oxygen element, wherein the carbon element is a few-layer graphene sheet formed by decomposing and reducing citric acid.

[0040] Compared with the preparation method of the inorganic photoluminescent material of Example 1, the inorganic photoluminescent material of this embodiment, the mass ratio of the boric acid and urea is 1:3, and the mass ratio of the total mass of the boric acid and urea to citric acid It is 200:1. In the step (4), react under 700W power condition for 10min, citric acid is decomposed and reduced to graphene. The obtained substance was mixed with boric acid and urea solution, reacted under the same power condition for 50 minutes, cooled t...

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Abstract

The invention provides an inorganic photoluminescence material with an adjustable fluorescence spectrum and a preparation method of the inorganic photoluminescence material. The inorganic photoluminescence material is prepared from citric acid, boric acid and urea as raw materials. The inorganic photoluminescence material consists of the following elements: 1-15wt% of a carbon element, 16-43wt% of a boron element, 8-28wt% of a nitrogen element and 21-45wt% of an oxygen element, wherein the carbon element is a small-layer graphene sheet which is prepared by decomposing and reducing the citric acid. The preparation method comprises the following steps: in the presence of an air atmosphere, enabling a citric acid solution to react for 3-10 minutes under a microwave power condition of 600-900W; and mixing a reaction system with a mixed solution of the boric acid and the urea, enabling the mixture to react for 10-90 minutes under a microwave power condition of 400-900W, cooling to the room temperature, and grinding a collected solid into powder, thereby obtaining the inorganic photoluminescence material. As the inorganic photoluminescence material is prepared by using two steps of microwave methods, the operation is simple and easy to achieve, and moreover, multi-color photoluminescence materials can be prepared by controlling raw material ratios, microwave power and reaction times of different steps.

Description

technical field [0001] The invention belongs to the technical field of functional materials, and in particular relates to an inorganic photoluminescence material with adjustable fluorescence spectrum and a preparation method thereof. Background technique [0002] Luminescent substances have become an indispensable and important material in people's production and life. At present, the substrates of luminescent materials mainly include the following types of compounds: sulfur series, silicate, aluminate, phosphate, borate, etc. For luminescent materials, in addition to the host material, the activator or co-activator is also very important. Usually the activator is rare earth elements, but the rare earth elements are expensive, the synthesis temperature is high (900 ° C), and a protective atmosphere (nitrogen or argon) is required. ) or reducing atmosphere (hydrogen) and its oxides and chlorides are highly toxic (Journal of The Electrochemical Society, 2009, 156(5):81~84.). ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/65
Inventor 康越马天李伟黄献聪王庆春祖媛媛蒋毅李伟萍郭亚飞
Owner THE QUARTERMASTER EQUIPMENT RESEARCH INSTITUTE OF THE GENERAL LOGISITIC DEPARTME