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Room temperature phosphorescent carbon dot material and its preparation method and application

A room-temperature phosphorescence and carbon dot technology, applied in luminescent materials, chemical instruments and methods, nanotechnology for materials and surface science, etc., can solve the problems of unstable performance of carbon dots and low yield, and achieve stable phosphorescence performance , high efficiency and good room temperature phosphorescent performance

Active Publication Date: 2021-12-17
SHENZHEN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the above-mentioned deficiencies of the prior art, to provide a room temperature phosphorescent carbon dot material and its preparation method, to solve the problem of unstable performance and low yield of carbon dots prepared by the existing room temperature phosphorescent carbon dot material preparation method question

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  • Room temperature phosphorescent carbon dot material and its preparation method and application
  • Room temperature phosphorescent carbon dot material and its preparation method and application
  • Room temperature phosphorescent carbon dot material and its preparation method and application

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preparation example Construction

[0029] On the one hand, an embodiment of the present invention provides a method for preparing a room temperature phosphorescent carbon dot material. The process flow of the preparation method of the room temperature phosphorescent carbon dot material is as follows: figure 1 As shown, it includes the following steps:

[0030] Step S01: dissolving acrylamide, urea and citric acid in water in proportion to prepare a mixture solution;

[0031] Step S02: performing hydrothermal reaction treatment on the mixture solution in a sealed environment, and then performing purification treatment.

[0032] Specifically, in the step S01, acrylamide, urea and citric acid jointly constitute raw materials for preparing room temperature phosphorescent carbon dot materials. In one embodiment, during the process of dissolving acrylamide, urea and citric acid in water in proportion, the mass ratio of acrylamide, urea and citric acid is controlled to be (1-8):(2-6): (0.1~1.0), the specific three ...

Embodiment 1

[0046] The first embodiment provides a room temperature phosphorescent carbon dot material and a preparation method thereof. The room temperature phosphorescent carbon dot material is prepared according to a method comprising the following steps:

[0047] S11: Weigh 4g of acrylamide, 4g of urea and 0.5g of citric acid respectively for use;

[0048] S12: Put the weighed acrylamide, urea and citric acid into 20mL ultrapure water (the water resistivity is 18.4MΩ·cm -1 ) in a beaker, stir well;

[0049] S13: Put the above-mentioned mixed solution into a 30mL polytetrafluoroethylene reactor, and heat the reactor in an oven at a constant temperature of 200°C for 36 hours, and the temperature will be room temperature;

[0050] S14: Put the brown solution obtained after the reaction into a 500Da dialysis bag, and dialyze it in a beaker with 2L ultrapure water to remove impurities and obtain a light yellow carbon dot solution;

[0051] S15: Put the obtained light yellow carbon dot s...

Embodiment 2

[0053] The first embodiment provides a room temperature phosphorescent carbon dot material and a preparation method thereof. The room temperature phosphorescent carbon dot material is prepared according to a method comprising the following steps:

[0054] S11: Weigh 1g of acrylamide, 4g of urea and 0.5g of citric acid respectively for use;

[0055] S12: Put the weighed acrylamide, urea and citric acid into 20mL ultrapure water (the water resistivity is 18.4MΩ·cm -1 ) in a beaker, stir well;

[0056] S13: Put the above-mentioned mixed solution into a 30mL polytetrafluoroethylene reactor, and heat the reactor in an oven at a constant temperature of 200°C for 36 hours, and the temperature will be room temperature;

[0057] S14: Put the brown solution obtained after the reaction into a 500Da dialysis bag, and dialyze it in a beaker with 2L ultrapure water to remove impurities and obtain a light yellow carbon dot solution;

[0058] S15: Put the obtained light yellow carbon dot s...

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Abstract

The invention provides a room temperature phosphorescent carbon dot material, a preparation method and application thereof. The preparation method of the room temperature phosphorescent carbon dot material includes the following steps: dissolving acrylamide, urea and citric acid in water in proportion to prepare a mixture solution; performing hydrothermal reaction treatment on the mixture solution in a sealed environment, and then Carry out purification treatment. The preparation method of the room temperature phosphorescent carbon dot material of the present invention adopts a hydrothermal method to prepare the room temperature phosphorescent carbon dot material, which can make the prepared room temperature phosphorescent carbon dot material have good room temperature phosphorescence performance and low toxicity; and ensure the prepared room temperature phosphorescent carbon dot material The particle size and phosphorescent performance of the material are stable, the efficiency is high, and the economic cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of chemical power sources, and in particular relates to a room temperature phosphorescent carbon dot material and its preparation method and application. Background technique [0002] Based on the light-emitting properties of optical materials such as photoluminescence (PL), up-conversion photoluminescence (UCPL), and phosphorescence, they are widely used in various fields. In recent decades, room-temperature phosphorescent (RTP) materials have developed rapidly and attracted extensive attention due to their importance and potential applications, especially in optoelectronic devices, sensing, bioimaging, and document security. [0003] The spin-forbidden nature of the triplet exciton transition and the nonradiative decay process limit the development of RTP materials. Although based on the two principles of enhancing spin-orbit coupling and confining vibration and rotation, various RTP materials can be obta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/65B82Y20/00B82Y30/00
CPCC09K11/65B82Y20/00B82Y30/00
Inventor 叶帅宋军李灏屈军乐
Owner SHENZHEN UNIV
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