Preparation method and evaluation method of high-stability iron oxide / graphene nanocomposite

By preparing iron oxide/graphene nanocomposites, the problem of poor stability of nano-Fe2O3 materials was solved, stable light absorption performance in a wide concentration range was achieved, and the service life and photothermal conversion performance of nano-materials were improved.

CN119542018BActive Publication Date: 2025-10-10KUNMING UNIV OF SCI & TECH
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Patent Information

Application Number
CN202411714350.4
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-11-27
Publication Date
2025-10-10
Estimated Expiration
2044-11-27

AI Technical Summary

Technical Problem

Existing nano-Fe2O3 materials have poor stability, and their absorbance is unstable with concentration changes. In particular, they are prone to agglomeration at high and low concentrations, resulting in a decrease in light absorption capacity.

Method used

By preparing iron oxide/graphene nanocomposites, the two-dimensional layered structure and high dispersibility of graphene are used to prevent nanoparticle agglomeration, the uniform distribution of Fe2O3 particles on the graphene surface is controlled, and the ratio of Fe2O3 to graphene is adjusted to ensure good light absorption properties within a wide concentration range.

Benefits of technology

The stability and light absorption capacity of nanomaterials in aqueous solution are improved, the service life is extended, and a significant absorbance function relationship is maintained at different concentrations, reducing the agglomeration effect.

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Abstract

The application discloses a preparation method and an evaluation method of high-stability iron oxide / graphene nanocomposite, and relates to the technical field of nanomaterials. The expanded graphite is dissolved in DMF and left overnight, a multilayer graphene solution is prepared by adding water after ultrasonic treatment of the mixture in an ice bath environment for 2.5-3 hours; FeCl3.4H2O and anhydrous sodium acetate are weighed and added into the multilayer graphene solution, and the mixture is stirred intensively to obtain a reaction precursor solution; the reaction precursor solution is kept in a water bath, cooled to room temperature, and subjected to high-speed centrifugal separation to obtain a wet sample; the wet sample is washed by using anhydrous ethanol and pure water, and dried to obtain a red-brown powder. By loading Fe2O3 particles on graphene, the two-dimensional sheet structure, high thermal conductivity and high dispersibility of the graphene can effectively prevent the agglomeration of the nanoparticles, ensure the uniform distribution of the particles, improve the stability of the nanomaterials in an aqueous solution, improve the light absorption capacity of the nanomaterials, and make the materials more stable in the photothermal conversion.
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