Cobalt-Oxide Photocatalyst for Cleaner Water
Official patent title
Cobalt oxide/calcium silicate @graphitic carbon nitride (CoO/CaSiO3@g-C3N4) nanocomposite as a photocatalyst
Arabic title: مركب نانوي من أكسيد الكوبالت/سيليكات الكالسيوم@نتريد الكربون الغرافيتي (CoO/CaSiO3@g-C3N4) كمحفز ضوئي
Invention
Invention
Problem
Industrial wastewater can contain persistent organic pollutants and toxic metal ions, while conventional adsorbents and unmodified g-C3N4 may provide limited surface area, visible-light response, or charge separation.
Why it matters
A light-assisted, filter-recoverable treatment material could broaden research on water purification, but pollutant-specific removal, cobalt release, catalyst recovery, durability, energy demand, and performance in real effluents require independent verification.
Approach
The disclosed method mixes polluted water with CoO/CaSiO3@g-C3N4, exposes the mixture to light, and filters out the nanocomposite to obtain treated water.
Who may benefit
Potential beneficiaries include university water-treatment researchers, photocatalyst developers, environmental laboratories, filtration-media designers, and industrial wastewater technology teams.
Potential value
The disclosure combines cobalt oxide and calcium silicate nanoparticles with g-C3N4 nanosheets in one light-driven treatment sequence that also specifies post-treatment filtration.
Background
Background
Industrial wastewater from mining, metal finishing, textiles, and chemical manufacturing can introduce toxic metal ions and organic pollutants into water systems. Adsorption is attractive because it can be operationally simple, while photocatalysis can use light to transform contaminants. Graphitic carbon nitride is chemically and thermally stable and responds to visible light, yet its relatively low surface area and rapid recombination of photogenerated charge carriers can limit performance. The publication positions metal-oxide modification of g-C3N4 as a way to address these material constraints.
Technology overview
Technology overview
The claimed purification method uses a CoO/CaSiO3@g-C3N4 composite containing hexagonal CoO and CaSiO3 particles dispersed on g-C3N4 nanosheets. The particles have an average diameter of 340 to 440 nm, and the composite has a band-gap range of 1.5 to 3.75 eV. Polluted aqueous solution is mixed with the material, illuminated, and then filtered. The claims further define narrower band-gap, particle-size, surface-area, pore-volume, and pore-diameter embodiments.
Potential applications
Potential applications
- Potential light-assisted treatment studies for pollutant-containing water.
- Research on combined adsorption and photocatalytic remediation.
- Development of filter-recoverable photocatalytic treatment media.
- Screening of visible-light nanocomposites for industrial wastewater applications.
Evidence-supported advantages
Evidence-supported advantages
- Combines adsorption-oriented surfaces with a light-responsive g-C3N4 matrix.
- Defines CoO and CaSiO3 particle phases and dimensional ranges.
- Includes filtration as an explicit material-recovery step.
- Provides multiple claimed ranges for band gap and pore characteristics.
Development stage
Development stage
Patent publication; development stage not independently verified.
Commercial opportunity
Commercial opportunity
The material could support licensed photocatalyst formulations, treatment-media prototypes, or collaborative wastewater-validation programs. Commercial assessment should first establish contaminant-specific removal and mineralization, material recovery, cobalt and particle release, regeneration, lifecycle impacts, and performance under realistic water chemistry and illumination conditions.
Patent classifications
Patent classifications
WIPO IPC
- B01J35/39Chemical or physical processes, e.g. catalysis or colloid chemistry; their relevant apparatus
- B01J21/18Chemical or physical processes, e.g. catalysis or colloid chemistry; their relevant apparatus
CPC
- B01J35/39Chemical or physical processes, e.g. catalysis or colloid chemistry; their relevant apparatus
- B01J35/40Chemical or physical processes, e.g. catalysis or colloid chemistry; their relevant apparatus
- B01J21/18Chemical or physical processes, e.g. catalysis or colloid chemistry; their relevant apparatus
- B01J23/02Chemical or physical processes, e.g. catalysis or colloid chemistry; their relevant apparatus
- B01J23/75Chemical or physical processes, e.g. catalysis or colloid chemistry; their relevant apparatus
- B01J35/50Chemical or physical processes, e.g. catalysis or colloid chemistry; their relevant apparatus
- C02F1/001Treatment of water, wastewater, sewage or sludge
- C02F1/288Treatment of water, wastewater, sewage or sludge
- C02F1/32Treatment of water, wastewater, sewage or sludge
- C02F1/725Treatment of water, wastewater, sewage or sludge
- C02F2305/08Treatment of water, wastewater, sewage or sludge
- C02F2305/10Treatment of water, wastewater, sewage or sludge
- Y02W10/37Climate-change mitigation technologies related to wastewater treatment or waste management
Inventors
Inventors
- First inventorMohamed Khairy Abdel Fattah Omran
- InventorBabiker Yagoub Elhadi Abdulkhair
Keywords
Keywords
- photocatalysis
- water purification
- CoO
- CaSiO3
- g-C3N4
- visible light
- nanocomposite
- filtration
Patent document and drawings
Patent document and drawings
The patent publication is mapped to this record. Patent drawings remain within that publication; no separately cleared public media package has been supplied.