Description

Key Properties & Advantages
UIO-66-(OH)₂’s performance is driven by its structural design and hydroxyl functionalization:

Exceptional Thermal & Chemical Stability: Maintains structural integrity at temperatures up to 380°C (under inert conditions) and resists degradation in acidic, basic, and organic solvent environments—ideal for harsh operational settings where many MOFs fail.
Ordered Porous Structure: Features a well-defined 3D porous network with a large BET surface area (typically 750–1100 m²/g) and uniform pore size (~1.0 nm), enabling efficient molecular diffusion and high adsorption capacity.
Hydroxyl-Enhanced Surface Reactivity: The -OH groups introduce:
Strong hydrogen-bonding capabilities, improving selectivity for polar molecules (e.g., CO₂, water, alcohols).
Lewis acid/base sites, enabling participation in acid-catalyzed or base-catalyzed reactions.
Chelation with metal ions, facilitating functionalization for targeted catalysis or sensing.
Tailored Selectivity: The density of hydroxyl groups can be controlled during synthesis, allowing customization of interactions with target molecules (e.g., adjusting affinity for specific gases or pollutants).
Batch-to-Batch Consistency: KAR-F30-(OH)₂ ensures minimal variation in key properties (surface area, porosity, functional group density), a critical advantage for scaling from lab research to industrial applications.
Applications
Gas Storage & Separation
Selective Gas Adsorption: Hydroxyl groups enhance affinity for polar gases like CO₂ and H₂, making it effective for:
Carbon capture from flue gases or industrial emissions (via selective CO₂ adsorption).
Hydrogen purification and storage (supporting clean energy technologies).
Mixed gas separation (e.g., CO₂/CH₄ in natural gas upgrading, H₂/CO₂ in syngas processing).
Liquid-Phase Adsorption
Pollutant Removal: Its porous structure and hydroxyl-mediated interactions enable efficient adsorption of liquid-phase contaminants, including:
Organic pollutants (e.g., phenols, dyes, pharmaceuticals) via hydrogen bonding and hydrophobic interactions.
Heavy metal ions (e.g., Cr³⁺, Cu²⁺) through chelation with -OH groups, supporting wastewater purification.
Catalytic Applications
Acid/Base Catalysis: Hydroxyl groups act as active sites for acid-catalyzed reactions (e.g., esterification, dehydration) and base-mediated processes (e.g., aldol condensation), leveraging their amphoteric nature.
Catalyst Support: Serves as a stable platform for anchoring metal nanoparticles (e.g., Pt, Ru) or metal oxides, with -OH groups enhancing particle dispersion and catalytic activity in reactions like:
CO₂ hydrogenation to value-added chemicals (e.g., methanol).
Oxidation of organic compounds (e.g., alcohol oxidation to aldehydes).
Technical Specifications
Parameter Details
CAS Number 1356031-63-4
Chemical Composition Zirconium clusters linked by dihydroxyl terephthalate ligands (typical formula: Zr₆O₄(OH)₄(bdc-(OH)₂)₆, where bdc-(OH)₂ = 2,5-dihydroxyterephthalate)
Appearance Off-white to light beige fine powder
Purity ≥95% (commercial grade)
BET Surface Area 750–1100 m²/g
Pore Size ~1.0 nm (uniform distribution)
Thermal Stability Up to 380°C (inert atmosphere)