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Abstract

A method for producing crystalline α-Fe2O3 nanoparticles involving ultrasonic treatment of a solution of an iron (III)-containing precursor and an extract from the seeds of a plant in the family Linaceae. The method involves preparing an aqueous extract from the seeds of a plant in the family Linacae and dropwise addition of the extract to the solution of an iron (III)-containing precursor. The method yields crystalline nanoparticles of α-Fe₂O₃ having a spherical morphology with a diameter of 100 nm to 300 nm, a mean surface area of 240 to 250 m²/g, and a type-II nitrogen adsorption-desorption BET isotherm with a H3 hysteresis loop. A method for the photocatalytic decomposition of organic pollutants using 10 the nanoparticles is disclosed. An antibacterial composition containing the crystalline α-Fe₂O₃ nanoparticles is also disclosed.

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