Description

Key Structural & Functional Advantages
MOF-808??s performance is rooted in its engineered framework, which delivers unique benefits for catalysis and adsorption:

Large Cavities & Hierarchical Porosity: Features interconnected cavities (up to ~18 ? in diameter) and a hierarchical pore network (micropores + mesopores), providing ample space for large molecules to diffuse and react. This structure eliminates mass transport limitations common in smaller-pore MOFs, critical for industrial-scale catalysis.
Stable Open Coordination Sites: Zirconium nodes in the framework retain unsaturated coordination sites (open metal sites) even after synthesis, acting as strong Lewis acid centers. These sites are highly stable under reaction conditions, enabling consistent catalytic activity over repeated cycles.
Exceptional Stability: Withstands temperatures up to 400??C (inert atmosphere) and resists degradation in acids (pH ?? 2), bases (pH ?? 11), and organic solvents. This stability ensures longevity in harsh industrial environments, outperforming many catalytic supports.
High Surface Area: Boasts a large BET surface area (typically 1200?C1800 m2/g), maximizing the number of active sites for catalysis and adsorption??enhancing efficiency in both processes.
Core Applications
Methane Oxidation to Methanol
MOF-808??s open zirconium sites and large cavities make it a leading candidate for methane activation:

Catalyzes the selective oxidation of methane (CH?) to methanol (CH?OH) under mild conditions, addressing the industrial challenge of converting methane (a potent greenhouse gas) into a valuable liquid fuel.
Open zirconium sites activate C-H bonds in methane, while the framework??s cavities accommodate the reactant and product molecules, preventing over-oxidation to CO?.
Heavy Metal Ion Capture
Its porous structure and zirconium-based functionality enable efficient removal of toxic heavy metals from industrial wastewater:

Open coordination sites and hydroxyl groups on the framework strongly chelate heavy metal ions (e.g., Pb2?, Hg2?, Cd2?), achieving high adsorption capacities (often >200 mg/g).
Stability in aqueous environments allows for repeated use in adsorption-desorption cycles, supporting cost-effective water purification.
Superacid Catalysis
MOF-808??s Lewis acid sites can be modified to act as superacid catalysts, enabling demanding acid-mediated reactions:

Catalyzes alkylation, isomerization, and dehydration reactions with high selectivity, replacing corrosive liquid acids (e.g., H?SO?) in industrial processes.
The framework??s stability prevents leaching of active sites, ensuring catalyst longevity and reducing environmental impact.
Water Adsorption
Its hydrophilic nature and large surface area make it effective for water capture and storage:

Adsorbs water vapor from humid air or industrial streams, with high capacity (up to 0.5 g/g) and reversible adsorption??suitable for desiccation, humidity control, or water harvesting in arid regions.
Selective Catalysis
The combination of open metal sites and tunable surface chemistry enables targeted catalytic reactions:

Facilitates selective oxidation of alcohols, alkenes, and sulfides to high-value chemicals.
Supports immobilization of metal nanoparticles (e.g., Pd, Pt) for hydrogenation or cross-coupling reactions, with the framework confining reactants to enhance selectivity.
Technical Specifications
Parameter Details
Chemical Composition Zirconium oxide clusters linked by 1,3,5-benzenetricarboxylate (BTC) ligands (typical formula: Zr?O?(OH)?(BTC)?(OH)?)
Appearance White to off-white crystalline powder
BET Surface Area 1200?C1800 m2/g
Pore Structure Hierarchical (large cavities ~18 ?; micropores/mesopores)
Thermal Stability Up to 400??C (inert atmosphere)
Chemical Stability Stable in pH 2?C11 aqueous solutions; resistant to organic solvents
Quality Assurance
Each batch of MOF-808 undergoes rigorous testing to ensure industrial-grade reliability:

X-ray diffraction (XRD) to confirm structural integrity and phase purity.
Nitrogen adsorption-desorption analysis to verify surface area and pore size distribution.
Catalytic activity screening (for selected batches) in model reactions (e.g., methane oxidation).
Stability testing under relevant operational conditions (temperature, pH, solvent exposure).