Preparation method of cuprous oxide quantum dots

Through room-temperature green colloidal chemistry methods, using dispersants such as CMC/PVP and sodium borohydride as a reducing agent, the difficulties of high temperature and high pressure, agglomeration, and purification in the synthesis of Cu2O quantum dots were solved, and the preparation of high-purity and well-dispersed Cu2O quantum dots was achieved, which reduced energy consumption and safety risks and simplified the process flow.

CN120589778AActive Publication Date: 2025-09-05SHANGHAI SECOND POLYTECHNIC UNIVERSITY
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Patent Information

Application Number
CN202511106081.8
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-08-08
Publication Date
2025-09-05
Estimated Expiration
2045-08-08

AI Technical Summary

Technical Problem

Existing methods for synthesizing Cu2O quantum dots suffer from high temperature and high pressure, agglomeration and inactivation, purification difficulties, carrier interference, and safety hazards, resulting in low product purity, high cost, and poor dispersibility.

Method used

A room-temperature green colloid chemistry method was adopted, using dispersants such as CMC/PVP and the low-toxic reducing agent sodium borohydride. The nucleation, growth and surface coating of Cu2O quantum dots were completed in one step by continuously injecting the reducing agent, avoiding high temperature and high pressure, and utilizing the steric hindrance and electrostatic repulsion of the dispersant to inhibit agglomeration.

Benefits of technology

The preparation of high-purity and well-dispersed Cu2O quantum dots was achieved, which reduced energy consumption and safety risks, simplified the process flow, lowered production costs, and maintained photocatalytic activity and stability.

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Abstract

The invention relates to a preparation method of cuprous oxide quantum dots, which comprises the following steps: (1) adding copper salt into deionized water, and ultrasonically stirring and uniformly mixing to obtain a solution A; (2) dissolving a dispersing agent in the special solution, and uniformly stirring to form a solution B; (3) adding the solution A in the step (1) into the solution B in the step (2), mixing, and carrying out ultrasonic treatment for more than 30 minutes to obtain a solution C; (4) adjusting the pH value of the solution C in the step (3) to 10-12 by using a sodium hydroxide solution; and (5) slowly dropwise adding a reducing agent into the mixed solution, and gradually changing the color of the solution. Nucleation and dispersion of the quantum dots are completed at the same time, and the quantum dot dispersion step is simplified; the stability of the cuprous oxide quantum dots is enhanced, and the problem that the cuprous oxide quantum dots are difficult to store stably is solved.
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