Iron Oxides/Hydroxides TRIZ Cases

An iron-coated Ni-Al core-shell precursor suppresses surface aluminum richness and raises lithium-ion battery discharge capacity without cobalt.

Selective removal of copper and iron plus controlled aluminum content enables recycled cathodes to match typical Li-ion battery performance.

High-purity γ-FeOOH in a lithium-sulfur cathode adsorbs polysulfides, improving discharge capacity and extending battery life.

Hydrothermal treatment of complexed iron and cobalt salts yields 5-50 μm cobalt ferrite particles with narrow size distribution at lower energy input.

Controlled AMO surface acidity boosts battery capacity and cycle life while avoiding electrolyte decomposition, gas generation, and component damage.

Electron-withdrawing groups tune metal oxide nanoparticle acidity to boost lithium uptake and cyclability without triggering electrolyte breakdown.

Controlled acidity on metal oxide cathodes boosts lithium battery capacity and cycle life without triggering electrolyte decomposition or component damage.

Controlled surface acidity on metal oxide nanoparticles boosts battery capacity and cycle life while limiting electrolyte breakdown and gas generation.

Controlled AMO surface acidity boosts battery capacity and cycle life while avoiding electrolyte decomposition and component degradation.

Controlled surface acidity on acidified metal oxide cathodes boosts lithium battery capacity and cycle life without triggering degradation or gas generation.

Oxygen-vacancy disordered rock salt cathodes avoid fluorination hazards while improving lithium conductivity, capacity, and scalability.

Controlled ferrite particle size and sphericity improve hole filling, storage stability, magnetic permeability, and low-loss curing.

Staged pH adjustment, alkaline leaching, and carbonation recover goethite and aluminum hydroxide from NCM solution while avoiding hazardous slag.

A three-zone chlorination process separates vanadium and iron from ore while recycling CO2 to CO, cutting emissions and improving recovery.

Poor phase homogeneity and uncontrolled grain growth are addressed through molecular sol-gel mixing and controlled combustion in this multiphase nanocomposite.

Microwave irradiation creates nanostructured high entropy oxides with more active surface area for stable, reproducible cortisol sensing.

A cuprous borate precipitate is filtered, pulverized, and oxidized to produce copper oxide nanoparticles with controlled size and high yield.

A staged hydrometallurgical process dissolves, separates, and precipitates iron, lead, and silver while reducing energy use.

A wet-chemical process adjusts bauxite residue suspension pH to disagglomerate mineral particles using cavitation for iron fraction separation.

Controlled bulk density and compaction of ferrite particles balance magnetic force with mechanical strength in bonded magnet rotors.

Lamellar double hydroxide catalyst paired with ferri-reducing bacteria converts agricultural slurry nitrates into dinitrogen gas, preventing aquifer pollution.

Replacing limestone with sodium agents eliminates gypsum contamination during atmospheric scorodite precipitation, ensuring stable arsenic immobilization.

Hydrothermal synthesis of Li-rich layered oxide particles reduces material cost while maintaining thermal stability.

Controlled beta-iron oxyhydroxide precursor particles enable high signal-to-noise ratio in epsilon-iron oxide recording layers.

Solid-state catalysts promote sulfide oxidation to sulfate, preventing elemental sulfur passivation that hinders leach kinetics.

Porous iron oxide nanoparticles accommodate lithium volume changes during cycling to maintain stable charge and discharge performance.

Combining iron compounds with alkaline components minimizes chemical storage complexity while reducing dissolved sulfide concentrations to 0.5 mg/L.

Hydrothermal oxidation converts carbon ferrochrome into alkali metal dichromate, replacing electrolysis to reduce power consumption.

Generating fresh ferric hydroxide via oxidation avoids acid byproducts, eliminating costly neutralization steps.

Synchronous precipitation removes multiple metal impurities in one step, while selective complexation isolates nickel crystals to reduce energy consumption.

A buffered iron slurry neutralizes hydrogen sulfide in wastewater using controlled pH adjustments.

Magnetic iron oxide red catalyst oxidizes methanthiol to dimethyl disulfide, resolving low conversion rates in industrial production.

Introducing potassium or sodium dopants into Co2Z hexaferrite maintains high magnetic permeability while reducing energy losses above 1 GHz.

Segmented pH control precipitates zinc sulfide while preventing gypsum and aluminum hydroxide co-precipitation for higher purity recovery.

Magnesium slurry solubilizes nickel and magnesium sulfates, separating them from iron hydroxides to resolve filtration bottlenecks.

Composite titanium oxide particles with solid solution dopants decompose acetaldehyde to 0.03 ppm under visible light while maintaining film transparency.

Acidified metal oxide nanomaterials boost battery capacity by balancing surface acidity to prevent component degradation during operation.

Pressurized oxidative leaching removes copper impurities from molybdenite while preserving molybdenum and rhenium, avoiding corrosive chloride reagents.

Ferrate oxidation converts phosphorus for capture by calcium reactive media, reducing costs and environmental impact.

A non-hazardous iron slurry neutralizes hydrogen sulfide in wastewater systems.

Aluminum complexation prevents fluorine contamination in gypsum, avoiding hazardous hydrogen sulfide generation during heavy metal removal.

Oxidation-reduction cycle produces spherical iron powder, avoiding toxic carbonyl processes and high-cost inert gas atomization.

Wet chemical oxidation yields spherical tricobalt tetraoxide with controlled morphology.

Selective chlorinating treatment converts waste impure chlorides into titanium tetrachloride, preventing valuable material loss.

Low-temperature aqueous chemistry precipitates commingled metals from spent batteries, avoiding high-energy thermal separation processes.

Ammonium oxalate complexes extract iron from copper ore waste in a controlled pH environment to produce high-purity ferrihydrite.

Rod-shaped molybdenum oxide supports amorphous iron molybdate islands to boost specific surface area.

A cationic reverse flotation process separates silica gangue from iron oxide slurries using amine collectors and frothers at natural pH levels.