Magnesium-aluminum hydrotalcite composite nitrogen-doped chestnut shell fluorescent carbon dots as well as preparation and application thereof

By inserting chestnut shell carbon-based extracts and diethylene triamines between the magnesium-aluminum hydrotalcite layers, nitrogen-doped chestnut shell fluorescent carbon dots is solved, and the existing carbon quantum dot materials have low fluorescent quantum yield and poor temperature resistance are achieved, and high-efficiency and low-cost fluorescent material preparation is achieved.

CN119709177APending Publication Date: 2025-03-28HEBEI NORMAL UNIVERSITY OF SCIENCE & TECHNOLOGY
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Patent Information

Application Number
CN202411905775.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-23
Publication Date
2025-03-28

AI Technical Summary

Technical Problem

The fluorescence quantum yield of existing carbon quantum dot materials is low, the fluorescence performance is susceptible to environmental factors, and the preparation cost is high, making it difficult to adapt to large-scale production and applications under extreme conditions.

Method used

The fluorescent carbon dots of the chestnut shell are synthesized in situ by inserting the chestnut shell carbon-based extract and diethylene triamine between the magnesium-aluminum hydrotalcite layer to improve its fluorescent quantum yield and temperature resistance.

Benefits of technology

It achieves high fluorescence quantum yield (up to 35%) and good temperature resistance, reduces preparation costs, and is suitable for large-scale production and applications under extreme conditions.

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Abstract

The invention discloses a magnesium-aluminum hydrotalcite composite nitrogen-doped chestnut shell fluorescent carbon dot as well as preparation and application thereof, the magnesium-aluminum hydrotalcite composite nitrogen-doped chestnut shell fluorescent carbon dot takes magnesium-aluminum hydrotalcite (Mg / Al-LDHs) as a main body structure, a chestnut shell carbon-based extract and diethylenetriamine (DETA) are sequentially inserted between layers of the main body structure, and the Mg / Al-LDHs composite nitrogen-doped chestnut shell fluorescent carbon dot is prepared. The diethylenetriamine and the chestnut shell carbon-based extract are subjected to a hydrothermal reaction, so that the nitrogen-doped chestnut shell fluorescent carbon dots are synthesized in situ between layers of the magnesium-aluminum hydrotalcite. The magnesium-aluminum hydrotalcite composite nitrogen-doped chestnut shell fluorescent carbon dot disclosed by the invention has relatively high fluorescence quantum yield, and the fluorescence quantum yield is as high as 35%; a fluorescence temperature resistance test (100-200 DEG C) shows that fluorescence of the magnesium-aluminum hydrotalcite composite nitrogen-doped chestnut shell fluorescent carbon dots has relatively strong temperature resistance. The chestnut shells are selected as natural source carbon-based preparation raw materials of the carbon dots, so that the total preparation cost is reduced.
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