Method for preparing white-light carbon dots by using defatted zanthoxylum bungeanum seeds and application thereof

By using defatted Sichuan pepper seeds to prepare white light carbon dots, the problem of monochromatic biomass carbon dot materials has been solved, and white light LEDs with high quantum yield and high color rendering index have been prepared, which has the advantages of being environmentally friendly and low cost.

CN118723975BActive Publication Date: 2026-06-16XIAN TECH UNIV
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Patent Information

Application Number
CN202410784816.1
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-06-18
Publication Date
2026-06-16
Estimated Expiration
2044-06-18

AI Technical Summary

Technical Problem

Existing biomass carbon dot materials have a single color and cannot directly produce white light, and rare earth compounds and heavy metal ions pose environmental and toxicity problems.

Method used

Using defatted Sichuan pepper seeds as a carbon source, white fluorescent carbon dot powder was prepared by reacting with amine compounds, combined with dialysis and freeze-drying. The powder was then mixed with compounds and deposited on an InGaN chip to prepare a white LED.

Benefits of technology

The preparation of white light carbon dots with high quantum yield has been achieved. These dots exhibit good dispersibility and optical properties, high color rendering index, are environmentally friendly, simple to operate, and low in cost.

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Abstract

The application discloses a method for preparing white-light carbon dots by using defatted Zanthoxylum bungeanum seeds and application thereof, and comprises the following steps: uniformly mixing the defatted Zanthoxylum bungeanum seeds in an organic solvent, and placing the mixture in a reaction kettle to react; cooling to room temperature after the reaction is completed, adding an amine compound, and again placing the mixture in the reaction kettle to react; after the reaction is completed, dialyzing the reacted solution by using a dialysis bag, and obtaining pure white-light fluorescent carbon dot powder after freeze-drying the dialyzed solution; the defatted Zanthoxylum bungeanum seeds are selected as a carbon source, a common fluorescent regulation mechanism is used to modify and optimize the structure, and a two-step method is used to directly synthesize a biomass derivative W1-CDs with excellent fluorescent characteristics.
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Citation Information

Patent Citations

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