Method for preparing high-purity bismuth selenide by regulating precursor concentration

By controlling the precursor concentration and molar ratio, high-purity Bi2Se3 nanomaterials were prepared, solving the problems of low purity and high cost in existing technologies. This achieved efficient photothermal conversion performance and expanded its application in solar-interface seawater desalination.

CN122166729APending Publication Date: 2026-06-09DALIAN UNIV OF TECH
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Patent Information

Application Number
CN202610433094.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-04-03
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

Existing solvothermal synthesis techniques suffer from problems such as the use of high-risk reagents, low product purity, and harsh reaction conditions, which limit the large-scale production and practical application of Bi2Se3 nanomaterials, especially in the field of solar-interface seawater desalination.

Method used

By controlling the precursor concentration and molar ratio, bismuth salt and selenium powder were dissolved in a mixture of alcohol and solvent, ultrasonically dispersed, and then subjected to a solvothermal reaction. Combined with centrifugation, washing, and drying, high-purity two-dimensional sheet-like Bi2Se3 nanomaterials were prepared.

Benefits of technology

The preparation of high-purity Bi2Se3 nanomaterials has been achieved, reducing the preparation cost, meeting the needs of photothermal and biomedical fields, and improving the photothermal conversion performance of solar evaporators.

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Abstract

The invention belongs to the technical field of two-dimensional semiconductor nanomaterials, and discloses a method for preparing high-purity bismuth selenide by regulating the concentration of a precursor. By accurately controlling the concentration of the bismuth source in the bismuth precursor solution and the concentration of the selenium source in the selenium precursor dispersion solution and optimizing the molar ratio of bismuth to selenium, sufficient reaction and accurate matching of the bismuth source and the selenium source are achieved, unreacted precursor residues and impure phase generation are effectively avoided, and the prepared bismuth selenide nano material is extremely high in purity and high in yield. The preparation method is simple, no extra purification process is needed, the preparation cost is reduced, meanwhile, the excellent physical and chemical properties of the material are guaranteed, and the strict requirements of the photo-thermal field, the biomedicine field and other fields on the high-purity bismuth selenide material can be met.
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