Visible light excited dual-mode long-afterglow carbon dot compound as well as preparation method and application thereof

A compound and dual-mode technology, applied in the field of materials, can solve the problems of limited applications, achieve the effects of promoting intersystem crossing, realizing long afterglow emission excited by visible light, and high optical stability

Pending Publication Date: 2020-12-29
HUAQIAO UNIVERSITY
2 Cites 5 Cited by

AI-Extracted Technical Summary

Problems solved by technology

However, most of the constructed CDs composite systems cannot simultaneously generate room temperature phosphorescence (RTP) and thermally activated delayed fluorescenc...
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Method used

2) get 2000 μ L step 1) prepared CDs solution and the boric acid of different quality (0.5g, 1g, 2g, 3g, 4g), join in 40mL secondary water, and ultrasonic 10min, make it fully mix. The mouth of the beaker was sealed with tin foil to prevent the water from evaporating too quickly.
2) get different volumes (100 μ L, 500 μ L, 1000 μ L, 2000 μ L, 3000 μ L, 3500 μ L) prepared CDs solution and 2g boric acid in step 1), join in 40mL secondary water, and ultrasonic 10min, make it fully mix. The mouth of the beaker was sealed with tin foil to prevent the water from evaporating too quickly.
[0050] 2) Get 2000 μL of CDs solution prepared in step 1) and 2 g of boric acid, add to 40 mL of...
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Abstract

The invention discloses a visible light excited dual-mode long-afterglow carbon dot compound as well as a preparation method and application thereof. The prepared carbon dots are doped into boron oxide grids in the high-temperature heating process, carbon-boron bonds are formed, inter-system jump is promoted, and the obtained CDs/B2O3 compound can obtain long-afterglow delayed fluorescence and room-temperature phosphorescence emission at the same time under visible light excitation, and the CDs/B2O3 compound with visible light excited delayed fluorescence and room-temperature phosphorescence has potential in the aspect of potential fingerprint identification.

Application Domain

Diagnostic recording/measuringSensors +1

Technology Topic

Boron oxideLight excitation +8

Image

  • Visible light excited dual-mode long-afterglow carbon dot compound as well as preparation method and application thereof
  • Visible light excited dual-mode long-afterglow carbon dot compound as well as preparation method and application thereof
  • Visible light excited dual-mode long-afterglow carbon dot compound as well as preparation method and application thereof

Examples

  • Experimental program(5)

Example Embodiment

[0038]Example 1:
[0039]1) Weigh 100mg of safranine T and dissolve it in 20mL 0.5M sodium hydroxide solution, and ultrasound for 10 minutes to completely dissolve safranine T; transfer the safranine T solution to an autoclave lined with 50mL PTFE, and After heating at 200°C for 5 hours, the CDs solution was obtained and stored in a refrigerator at 4°C.
[0040]2) Take different volumes (100 μL, 500 μL, 1000 μL, 2000 μL, 3000 μL, 3500 μL) of the CDs solution prepared in step 1) and 2 g of boric acid, add them to 40 mL of secondary water, and sonicate for 10 minutes to mix well. The mouth of the beaker is sealed with tin foil to prevent the moisture from evaporating too quickly.
[0041]3) Place the mixed solution of CDs and boric acid in step 2) in an oven at 180°C for 5 hours and then cool to room temperature.
[0042]4) Grind the sample prepared in step 3) into powder, and finally get CDs/B2O3The compound powder is stored in a desiccator.

Example Embodiment

[0043]Example 2:
[0044]1) Weigh 100mg of safranine T and dissolve it in 20mL 0.5M sodium hydroxide solution, and ultrasound for 10 minutes to completely dissolve safranine T; transfer the safranine T solution to an autoclave lined with 50mL PTFE, and After heating at 200°C for 5 hours, the CDs solution was obtained and stored in a refrigerator at 4°C.
[0045]2) Take 2000 μL of the CDs solution prepared in step 1) and boric acid of different masses (0.5 g, 1 g, 2 g, 3 g, 4 g), add them to 40 mL of secondary water, and sonicate for 10 minutes to mix them thoroughly. The mouth of the beaker is sealed with tin foil to prevent the moisture from evaporating too quickly.
[0046]3) Place the mixed solution of CDs and boric acid in step 2) in an oven at 180°C for 5 hours and then cool to room temperature.
[0047]4) Grind the sample prepared in step 3) into powder, and finally get CDs/B2O3The compound powder is stored in a desiccator.

Example Embodiment

[0048]Example 3:
[0049]1) Weigh 100mg of safranine T and dissolve it in 20mL 0.5M sodium hydroxide solution, and ultrasound for 10 minutes to completely dissolve safranine T; transfer the safranine T solution to an autoclave lined with 50mL PTFE, and After heating at 200°C for 5 hours, the CDs solution was obtained and stored in a refrigerator at 4°C.
[0050]2) Take 2000 μL of the CDs solution prepared in step 1) and 2 g of boric acid, add them to 40 mL of secondary water, and sonicate for 10 minutes to mix them thoroughly. The mouth of the beaker is sealed with tin foil to prevent the moisture from evaporating too quickly.
[0051]3) Place the mixed solution of CDs and boric acid in step 2) in an oven at different temperatures (140°C, 160°C, 180°C, 200°C, 220°C) for 6 hours, and then cool to room temperature.
[0052]4) Grind the sample prepared in step 3) into powder, and finally get CDs/B2O3The compound powder is stored in a desiccator.

PUM

no PUM

Description & Claims & Application Information

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