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US 12,275,881 B1Granted
Method for making bismuth oxyhalide quantum dots
AssigneeImam Mohammad Ibn Saud Islamic University
InventorsBabiker Y. Abdulkhair, Faisal K. Algethami, Mohamed R. Elamin
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Abstract
A method of producing bismuth oxyhalide quantum dots without heat. The method is a one-pot method that includes synthesizing bismuth oxyhalide quantum dots at room temperature. The method results in quantum dots preferably having bismuth and halide in a molar ratio of 1:1. Further, the bismuth oxyhalide quantum dots produced demonstrate excellent photocatalytic activity in the visible light spectrum and possess improved surface characteristics.
Claims14
A method of making bismuth oxyhalide quantum dots, comprising:
- forming a first solution by dissolving a bismuth salt in an organic solvent selected from the group consisting of polyethylene glycol, methylene glycol, tri-ethylene glycol, and ethylene glycol;
- forming a second solution by dissolving an alkali metal salt in water;
- combining the first solution and the second solution to obtain a dual mixture;
- combining the dual mixture with an aqueous surfactant solution comprising a surfactant to obtain a final mixture comprising the bismuth oxyhalide quantum dots, wherein the surfactant is a polyoxyethylene glycol sorbitan alkyl ester;
- and
- filtering the final solution to obtain the bismuth oxyhalide quantum dots,
- wherein the alkali metal salt is selected from the group consisting of LiI, NaI, KI, CsI, LiBr, NaBr, KBr, CsBr, LiCl, NaCl, KCl, and CsCl, and
- wherein the method is carried out without added heat.
5 more elements
Dependencies are inferred from the claim text.