US 12,017,925 B2Granted

Method for treating polluted composition

AssigneeImam Abdulrahman Bin Faisal University

InventorHanan Hussein Amin Mohamed

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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 the nanoparticles is disclosed. An antibacterial composition containing the crystalline α-Fe2O3 nanoparticles is also disclosed.

Claims8

Dependent claims

A method for the photodegradation of an organic pollutant comprising:

mixing crystalline nanoparticles of α-Fe2O3 with a treatment solution containing at least one organic pollutant selected from the group consisting of a dye, a phenol, and a polycyclic aromatic hydrocarbon, and a solvent to form a treatment composition;
and
irradiating the treatment composition with visible light to photodegrade the organic pollutant and form an exposed composition;
then
separating a solid product containing the crystalline nanoparticles of α-Fe2O, from the exposed composition and form a purified solution;
wherein the crystalline nanoparticles of α-Fe2O;
are spherical with a diameter from 50 to 500 nm and have an average sphericity of greater than 0.94 or a cross-section or projection with an average circularity of greater than 0.94;
wherein the crystalline nanoparticles of α-Fe2O3 have a band gap of 2.10 to 2.16 eV, a surface area of 240 to 260 m2/g, a Type II BET nitrogen adsorption-desorption curve with a H3 hysteresis loop, and a mean pore size of 7.25 to 9.25 nm.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 18/213,519Filed 23 Jun 2023 · continuation
Priority: 25 Sep 2019
Published: US 2023/0331581 A119 Oct 2023
Granted: 25 Jun 2024
Term ends: Not estimatedThe source records don’t support an estimate.

Classification48 codes

C01G 49/04
Oxides; Hydroxides: ferrous oxide [FeO]
C30B 29/60
Single crystals or homogeneous polycrystalline material with defined structure characterised by the material or by their shape: characterised by shape
A61P 31/00
Antiinfectives, i.e. antibiotics, antiseptics, chemotherapeutics
B01J 23/745
Iron group metals: iron

Family

Application16/582,693Parent of this continuation · filed 25 Sep 2019
Application17/543,899Parent of this continuation · filed 7 Dec 2021
US 2023/0331581 A1Pre-grant publication · published 19 Oct 2023
US 11,739,003 B2Parent of this continuation
US 11,235,983 B2Parent of this continuation
US 2021/0087072 A1Published application
US 2022/0089454 A1Published application
US 12,017,925 B2This patent

From the US filing history. Foreign family members aren’t listed.