Calcium-Cobalt-Magnesium Oxide Nanocomposites
Official patent title
Fabrication of Ca3Co4O9/MgO nanocomposite materials using pechini sol-gel method
Arabic title: تصنيع مواد مركبة نانوية من Ca.SUB.3.Co.SUB.4.O.SUB.9./MgO باستخدام طريقة Pechini sol-gel
Invention
Invention
Problem
Producing multiphase calcium-cobalt oxide and magnesium oxide materials with controlled phases and nanoscale characteristics can require carefully managed precursor chemistry and heat treatment.
Why it matters
A reproducible oxide synthesis route could support research into adsorbents, catalysts, ceramics, and other functional materials whose behavior depends on phase composition and microstructure.
Approach
The process applies Pechini sol-gel chemistry to calcium, cobalt, and magnesium precursors with a chelating acid and polyol. Drying and calcination produce Ca3Co4O9/MgO-related multiphase powders whose phase composition changes with precursor selection and calcination temperature.
Who may benefit
Potential beneficiaries include ceramic and nanomaterial producers, water-treatment researchers, catalyst laboratories, solid-state chemists, and teams developing controlled multiphase oxide powders.
Potential value
The disclosure links defined Pechini processing windows to alternative calcium-cobalt-magnesium oxide phase assemblages and provides structural and morphological characterization.
Background
Background
Multiphase nanocomposites can combine properties that are unavailable from a single oxide, but their usefulness depends on controlling precursor ratios, gel formation, calcination, crystallite size, and morphology. The publication focuses on calcium-cobalt oxide phases combined with magnesium oxide and presents two precursor pathways. It also proposes immobilizing inorganic contaminants in water. The supplied record includes synthesis and X-ray, microscopy, and elemental characterization, but it does not report contaminant-removal capacity, kinetics, selectivity, leaching, or reuse performance.
Technology overview
Technology overview
Aqueous calcium, magnesium, and cobalt salts are combined with a chelating acid and polyol to form a Pechini gel. The gel is heated at about 200–400 °C and then calcined within about 500–900 °C. One route uses calcium carbonate and cobalt oxide; another uses calcium oxide and a calcium-cobalt oxide precursor. XRD, SEM, and EDX are used to distinguish phases, crystallite dimensions, particle morphology, and elemental composition across the resulting powders.
Potential applications
Potential applications
- Candidate sorbent research for immobilizing inorganic water contaminants.
- Multiphase oxide powders for ceramic-material studies.
- Calcium-cobalt-magnesium oxide catalyst screening.
- Pechini synthesis research for phase-controlled nanocomposites.
Evidence-supported advantages
Evidence-supported advantages
- The route uses solution processing followed by defined thermal steps.
- Alternative precursor sets provide different phase assemblages.
- Calcination temperature is used as a phase-control variable.
- XRD, SEM, and EDX characterization are described for the products.
Development stage
Development stage
Laboratory synthesis and XRD, SEM, and EDX characterization are described; scale-up and contaminant-immobilization performance are not established in the supplied evidence.
Commercial opportunity
Commercial opportunity
The method may support specialty oxide or environmental-material development. Commercial assessment requires batch reproducibility, yield, precursor and furnace costs, powder handling, scale-up, and application-specific testing. Contaminant immobilization must be independently verified with capacity, kinetics, selectivity, leaching, regeneration, and realistic-water studies before treatment claims can be relied upon.
Patent classifications
Patent classifications
WIPO IPC
- B01J20/04Chemical or physical processes, e.g. catalysis or colloid chemistry; their relevant apparatus
- B01J20/06Chemical or physical processes, e.g. catalysis or colloid chemistry; their relevant apparatus
- C02F101/10Treatment of water, wastewater, sewage or sludge
CPC
- B01J37/084Chemical or physical processes, e.g. catalysis or colloid chemistry; their relevant apparatus
- B01J37/04Chemical or physical processes, e.g. catalysis or colloid chemistry; their relevant apparatus
- B01J35/51Chemical or physical processes, e.g. catalysis or colloid chemistry; their relevant apparatus
- B01J20/28019Chemical or physical processes, e.g. catalysis or colloid chemistry; their relevant apparatus
- B01J20/28004Chemical or physical processes, e.g. catalysis or colloid chemistry; their relevant apparatus
- C02F1/302Treatment of water, wastewater, sewage or sludge
- B01J35/40Chemical or physical processes, e.g. catalysis or colloid chemistry; their relevant apparatus
- B01J20/305Chemical or physical processes, e.g. catalysis or colloid chemistry; their relevant apparatus
- B01J23/78Chemical or physical processes, e.g. catalysis or colloid chemistry; their relevant apparatus
- B01J35/393Chemical or physical processes, e.g. catalysis or colloid chemistry; their relevant apparatus
- B01J35/39Chemical or physical processes, e.g. catalysis or colloid chemistry; their relevant apparatus
- B01J20/3078Chemical or physical processes, e.g. catalysis or colloid chemistry; their relevant apparatus
- B01J37/088Chemical or physical processes, e.g. catalysis or colloid chemistry; their relevant apparatus
- C02F1/725Treatment of water, wastewater, sewage or sludge
- B01J37/0018Chemical or physical processes, e.g. catalysis or colloid chemistry; their relevant apparatus
- B01J20/3028Chemical or physical processes, e.g. catalysis or colloid chemistry; their relevant apparatus
- B01J20/06Chemical or physical processes, e.g. catalysis or colloid chemistry; their relevant apparatus
- B01J20/041Chemical or physical processes, e.g. catalysis or colloid chemistry; their relevant apparatus
- C02F1/288Treatment of water, wastewater, sewage or sludge
- C02F2101/30Treatment of water, wastewater, sewage or sludge
- C02F1/281Treatment of water, wastewater, sewage or sludge
- C02F2305/10Treatment of water, wastewater, sewage or sludge
- C02F2305/08Treatment of water, wastewater, sewage or sludge
- C02F2101/10Treatment of water, wastewater, sewage or sludge
Inventors
Inventors
- First inventorEhab Abdelhamed Abdelrahman Ahmed
Keywords
Keywords
- Ca3Co4O9
- magnesium oxide
- nanocomposite
- Pechini method
- sol-gel
- calcination
- phase control
- water remediation
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.