Patents by Inventor Kiril D. Hristovski
Kiril D. Hristovski has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11760663Abstract: A reactor for water splitting or water treatment includes a first electrode, a second electrode electrically coupled to the first electrode, and a proton exchange membrane separating the first electrode and the second electrode. The first electrode includes a first optical fiber coated with a photocatalytic material.Type: GrantFiled: October 5, 2020Date of Patent: September 19, 2023Assignee: Arizona Board of Regents on behalf of Arizona State UniversityInventors: Paul K. Westerhoff, Kiril D. Hristovski, Shahnawaz Sinha
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Patent number: 11396004Abstract: A method for preparing a nano-enabled activated carbon block, a nano-enabled activated carbon block produced by the method, a household water filtration system comprising the nano-enabled activated carbon block, and a method for filtering tap water using the household water filtration system are provided. The method includes contacting a solution including a metal(lic) precursor (e.g. a titanium compound and/or an iron compound and/or a zirconium compound) with activated carbon particles such that the solution fills pores of the activated carbon particles. The method further includes causing a metal (hydr)oxide (e.g. titanium dioxide and/or zirconium dioxide and/or iron oxide) to precipitate from the solution thereby causing metal oxide nanoparticles to become deposited within pores of the activated carbon particles. The method also includes preparing a nano-enabled activated carbon block from the activated carbon particles having metal oxide nanoparticles deposited within the pores thereof.Type: GrantFiled: March 15, 2019Date of Patent: July 26, 2022Assignees: Access Business Group International LLC, Arizona Board of Regents on behalf of Arizona State UniversityInventors: Zhenxiao Cai, Scott A. Mollema, Ariel J. Atkinson, Kiril D. Hristovski, Jasmina S. Markovski, Paul K. Westerhoff
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Patent number: 11273427Abstract: Fabricating a hybrid sorbent media includes contacting a porous material with a first aqueous solution including phosphate ions to yield a first mixture, contacting the first mixture with a second aqueous solution comprising calcium ions to yield a second mixture, and adjusting a pH of the second mixture to form hydroxyapatite inside the porous media to yield the hybrid sorbent media.Type: GrantFiled: August 22, 2019Date of Patent: March 15, 2022Assignee: Arizona Board of Regents on behalf of Arizona State UniversityInventors: Jasmina Markovski, Kiril D. Hristovski
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Patent number: 10927016Abstract: Preparing a porous hybrid media includes contacting porous media (e.g., strong base ion-exchange media) with an aqueous solution including aluminum ions to yield a aluminum-ion-containing porous media, contacting the aluminum-ion containing porous media with a reducing agent to impregnate elemental aluminum in the porous media, and oxidizing the elemental aluminum to yield a porous hybrid media including aluminum hydr(oxide) impregnated in the porous media. In some cases, a pH of an aqueous mixture including the aluminum-ion-containing porous media may be adjusted to form a floc including aluminum hydroxide, and the aluminum hydroxide-containing porous media may be contacted with a reducing agent to yield a porous hybrid media including aluminum hydr(oxide) impregnated in the porous media. The porous hybrid media may advantageously be prepared at low temperature (e.g., room temperature).Type: GrantFiled: October 7, 2019Date of Patent: February 23, 2021Assignee: Arizona Board of Regents on behalf of Arizona State UniversityInventors: Kiril D. Hristovski, Jasmina Markovski, Paul K. Westerhoff, Shahnawaz Sinha
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Publication number: 20210032130Abstract: A reactor for water splitting or water treatment includes a first electrode, a second electrode electrically coupled to the first electrode, and a proton exchange membrane separating the first electrode and the second electrode. The first electrode includes a first optical fiber coated with a photocatalytic material.Type: ApplicationFiled: October 5, 2020Publication date: February 4, 2021Inventors: Paul K. Westerhoff, Kiril D. Hristovski, Shahnawaz Sinha
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Patent number: 10793449Abstract: A reactor for water splitting or water treatment includes a first electrode, a second electrode electrically coupled to the first electrode, and a proton exchange membrane separating the first electrode and the second electrode. The first electrode includes a first optical fiber coated with a photocatalytic material.Type: GrantFiled: April 27, 2017Date of Patent: October 6, 2020Assignee: Arizona Board of Regents on behalf of Arizona State UniversityInventors: Paul K. Westerhoff, Kiril D. Hristovski, Shahnawaz Sinha
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Publication number: 20200290014Abstract: A method for preparing a nano-enabled activated carbon block, a nano-enabled activated carbon block produced by the method, a household water filtration system comprising the nano-enabled activated carbon block, and a method for filtering tap water using the household water filtration system are provided. The method includes contacting a solution including a metal(lic) precursor (e.g. a titanium compound and/or an iron compound and/or a zirconium compound) with activated carbon particles such that the solution fills pores of the activated carbon particles. The method further includes causing a metal (hydr)oxide (e.g. titanium dioxide and/or zirconium dioxide and/or iron oxide) to precipitate from the solution thereby causing metal oxide nanoparticles to become deposited within pores of the activated carbon particles. The method also includes preparing a nano-enabled activated carbon block from the activated carbon particles having metal oxide nanoparticles deposited within the pores thereof.Type: ApplicationFiled: March 15, 2019Publication date: September 17, 2020Inventors: Zhenxiao CAI, Scott A. MOLLEMA, Ariel J. ATKINSON, Kiril D. HRISTOVSKI, Jasmina S. MARKOVSKI, Paul K. WESTERHOFF
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Publication number: 20200061575Abstract: Fabricating a hybrid sorbent media includes contacting a porous material with a first aqueous solution including phosphate ions to yield a first mixture, contacting the first mixture with a second aqueous solution comprising calcium ions to yield a second mixture, and adjusting a pH of the second mixture to form hydroxyapatite inside the porous media to yield the hybrid sorbent media.Type: ApplicationFiled: August 22, 2019Publication date: February 27, 2020Inventors: Jasmina Markovski, Kiril D. Hristovski
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Publication number: 20200031689Abstract: Preparing a porous hybrid media includes contacting porous media (e.g., strong base ion-exchange media) with an aqueous solution including aluminum ions to yield a aluminum-ion-containing porous media, contacting the aluminum-ion containing porous media with a reducing agent to impregnate elemental aluminum in the porous media, and oxidizing the elemental aluminum to yield a porous hybrid media including aluminum hydr(oxide) impregnated in the porous media. In some cases, a pH of an aqueous mixture including the aluminum-ion-containing porous media may be adjusted to form a floc including aluminum hydroxide, and the aluminum hydroxide-containing porous media may be contacted with a reducing agent to yield a porous hybrid media including aluminum hydr(oxide) impregnated in the porous media. The porous hybrid media may advantageously be prepared at low temperature (e.g., room temperature).Type: ApplicationFiled: October 7, 2019Publication date: January 30, 2020Inventors: Kiril D. Hristovski, Jasmina Markovski, Paul K. Westerhoff, Shahnawaz Sinha
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Patent number: 10435311Abstract: Preparing a porous hybrid media includes contacting porous media (e.g., strong base ion-exchange media) with an aqueous solution including aluminum ions to yield a aluminum-ion-containing porous media, contacting the aluminum-ion containing porous media with a reducing agent to impregnate elemental aluminum in the porous media, and oxidizing the elemental aluminum to yield a porous hybrid media including aluminum hydr(oxide) impregnated in the porous media. In some cases, a pH of an aqueous mixture including the aluminum-ion-containing porous media may be adjusted to form a floc including aluminum hydroxide, and the aluminum hydroxide-containing porous media may be contacted with a reducing agent to yield a porous hybrid media including aluminum hydr(oxide) impregnated in the porous media. The porous hybrid media may advantageously be prepared at low temperature (e.g., room temperature).Type: GrantFiled: September 28, 2017Date of Patent: October 8, 2019Assignee: Arizona Board of Regents on behalf of Arizona State UniversityInventors: Kiril D. Hristovski, Jasmina Markovski, Paul K. Westerhoff, Shahnawaz Sinha
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Publication number: 20180086648Abstract: Preparing a porous hybrid media includes contacting porous media (e.g., strong base ion-exchange media) with an aqueous solution including aluminum ions to yield a aluminum-ion-containing porous media, contacting the aluminum-ion containing porous media with a reducing agent to impregnate elemental aluminum in the porous media, and oxidizing the elemental aluminum to yield a porous hybrid media including aluminum hydr(oxide) impregnated in the porous media. In some cases, a pH of an aqueous mixture including the aluminum-ion-containing porous media may be adjusted to form a floc including aluminum hydroxide, and the aluminum hydroxide-containing porous media may be contacted with a reducing agent to yield a porous hybrid media including aluminum hydr(oxide) impregnated in the porous media. The porous hybrid media may advantageously be prepared at low temperature (e.g., room temperature).Type: ApplicationFiled: September 28, 2017Publication date: March 29, 2018Inventors: Kiril D. Hristovski, Jasmina Markovski, Paul K. Westerhoff, Shahnawaz Sinha
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Publication number: 20180080148Abstract: Porous nanocomposite fibers are fabricated by electrospinning a solution including a polymer, a solvent, and a nanomaterial. The resulting fibers can be used in the form of a filter to remove a variety of organic and inorganic contaminants from an aqueous environment, and provide a macroscopic matrix to facilitate separation of the nanomaterial from the aqueous environment.Type: ApplicationFiled: September 15, 2017Publication date: March 22, 2018Inventors: Paul K. Westerhoff, Natalia Hoogesteijn von Reitzenstein, Shahnawaz Sinha, Kiril D. Hristovski
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Patent number: 9878320Abstract: Hybrid media formed by combining a metal precursor solution with particulate media to yield a mixture, decanting the mixture to yield a decanted mixture, heating the decanted mixture in via microwave radiation to yield hybrid media, rinsing the hybrid media with water, soaking the rinsed hybrid media in a salt solution, and rinsing the soaked hybrid media with water. The hybrid media includes a metal dioxide derived from the metal precursor, such as TiO2 derived from TiOSO4.Type: GrantFiled: July 10, 2015Date of Patent: January 30, 2018Assignee: Arizona Board of Regents on behalf of Arizona State UniversityInventors: Kiril D. Hristovski, Paul K. Westerhoff
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Publication number: 20170313601Abstract: A reactor for water splitting or water treatment includes a first electrode, a second electrode electrically coupled to the first electrode, and a proton exchange membrane separating the first electrode and the second electrode. The first electrode includes a first optical fiber coated with a photocatalytic material.Type: ApplicationFiled: April 27, 2017Publication date: November 2, 2017Inventors: Paul K. Westerhoff, Kiril D. Hristovski, Shahnawaz Sinha
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Patent number: 9751785Abstract: A water treatment system including: a flow regulation control system configured to combine oxo-anion-contaminated water with a reduction-promoting agent, a hole scavenger, or both; a reactor fluidically coupled to the flow regulation control system; a first set of system control probes configured to monitor the concentration of oxygen and oxo-anion in the contaminated water; a second set of system control probes configured to monitor concentration of the oxo-anion and reduction products of the oxo-anion in treated effluent from the reactor; and a controller configured to control the flow regulation control system, thereby controlling the flow rate of the contaminated water and the at least one of the reduction-promoting agent and the hole scavenger to the reactor based at least in part on the concentration of oxo-anion and the reduction products of the oxo-anion in the treated effluent.Type: GrantFiled: October 8, 2014Date of Patent: September 5, 2017Assignee: Arizona Board of Regents for and on behalf of Arizona State UniversityInventors: Kyle Doudrick, Kiril D. Hristovski, Paul K. Westerhoff
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Publication number: 20160334311Abstract: The present disclosure provides systems and methods for measuring a water contaminant. In an exemplary embodiment the system comprises an intake configured to be in fluid communication with a water source of interest, a cumulative flow meter configured to measure the amount of water passing through the cumulative sampler system, and a sampler cell configured to receive water from the intake, the sampler cell comprising a media configured to adsorb the water contaminant.Type: ApplicationFiled: May 11, 2016Publication date: November 17, 2016Inventors: Paul K. Westerhoff, Kiril D. Hristovski
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Publication number: 20160008805Abstract: Hybrid media formed by combining a metal precursor solution with particulate media to yield a mixture, decanting the mixture to yield a decanted mixture, heating the decanted mixture in via microwave radiation to yield hybrid media, rinsing the hybrid media with water, soaking the rinsed hybrid media in a salt solution, and rinsing the soaked hybrid media with water. The hybrid media includes a metal dioxide derived from the metal precursor, such as TiO2 derived from TiOSO4.Type: ApplicationFiled: July 10, 2015Publication date: January 14, 2016Inventors: Kiril D. Hristovski, Paul K. Westerhoff
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Publication number: 20150096941Abstract: A water treatment system including: a flow regulation control system configured to combine oxo-anion-contaminated water with a reduction-promoting agent, a hole scavenger, or both; a reactor fluidically coupled to the flow regulation control system; a first set of system control probes configured to monitor the concentration of oxygen and oxo-anion in the contaminated water; a second set of system control probes configured to monitor concentration of the oxo-anion and reduction products of the oxo-anion in treated effluent from the reactor; and a controller configured to control the flow regulation control system, thereby controlling the flow rate of the contaminated water and the at least one of the reduction-promoting agent and the hole scavenger to the reactor based at least in part on the concentration of oxo-anion and the reduction products of the oxo-anion in the treated effluent.Type: ApplicationFiled: October 8, 2014Publication date: April 9, 2015Inventors: Kyle Doudrick, Kiril D. Hristovski, Paul K. Westerhoff
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Publication number: 20130175220Abstract: A titanium dioxide-based hybrid ion-exchange media including anatase titanium dioxide nanoparticles supported by an ion-exchange resin for removing strong acid ions and oxo-anions from water. The titanium dioxide-based hybrid ion-exchange media is prepared in situ by combining ion-exchange media with a TiO2+ precursor solution to form a mixture and heating the mixture to yield the hybrid ion-exchange media.Type: ApplicationFiled: January 10, 2013Publication date: July 11, 2013Inventors: Kiril D. Hristovski, Paul K. Westerhoff