Photochemical removal of odors and pathogens by bifunctional metal-organic frameworks
Bifunctional metal-organic frameworks (MOFs) that combine adsorption and photocatalysis to capture volatile organic compounds and inactivate airborne pathogens, improving indoor air quality. The technology leverages titanium-oxo cluster MOFs for efficient, low-cost air filtration media.
Overview
Volatile organic compounds (VOCs) are a primary source of unpleasant odors and pose significant hazards to indoor environments and human health. This research proposes bifunctional metal-organic frameworks (MOFs) that serve dual roles as adsorbents and photocatalysts to remove VOCs and inactivate pathogens from indoor air. MOFs are highly robust, porous materials assembled from metal clusters and organic linkers, offering exceptionally high surface areas that enable efficient capture of volatile chemicals. By incorporating titanium-oxo clusters inspired by TiO2 photocatalysis, the materials can also degrade captured compounds and generate reactive oxygen species to inactivate pathogens, producing porous filtration media that improve indoor environmental quality.
Technical specifications
Key features:
- High surface area adsorption: MOFs with surface areas exceeding 7000 m2/g capture volatile organic compounds with high selectivity and efficiency
- Photocatalytic degradation: Titanium-oxo cluster-containing MOFs enable light-driven chemical degradation and pathogen inactivation
- Reactive oxygen species generation: Photoactive MOFs with biomimicking linkers produce reactive oxygen species for photochemical inactivation of pathogens
- Versatile MOF platforms: Includes MIL-125-NH2 for degradation of polyfluoroalkyl substances, and MIL-100 and PCN-416 for photocatalytic applications
- Direct synthesis and post-synthetic modification: New photocatalytic MOFs developed through both synthesis routes to optimize adsorption, catalytic activity, stability, and lifetime
- Naturally abundant reagents: Focus on cost-effective, abundant starting materials to lower overall production costs
Technology readiness level
This research is at an early-to-mid stage of development. The foundational science is well established: MOFs have demonstrated exceptional surface areas and adsorption capabilities, and titanium-oxo cluster MOFs have been validated as efficient photocatalysts in prior studies for water treatment, hydrogen production, and photochemical synthesis. Future validation will focus on synthesizing new photocatalytic MOFs, testing adsorption and catalytic performance parameters, identifying dominant odor-removal mechanisms, and evaluating inactivation potential against hazardous chemicals. The work aims to produce porous filtration media ready for pilot-scale testing in indoor air quality applications.
About Texas A&M University, College Station
Texas A&M University in College Station is a comprehensive public research university and the flagship of The Texas A&M University System, combining broad academic strengths with a strong applied‑research culture. Industry collaborates on the Texas A&M‑RELLIS campus—an integrated education, research and testing environment that supports large‑scale experimentation and proving grounds—and through the Texas A&M Transportation Institute’s facilities in Bryan‑College Station. A statewide extension network connects university expertise to companies and communities across all Texas counties, enabling rapid piloting and deployment. Research is supported by competitive federal funding from agencies such as NSF, NIH, DOE, USDA and DoD, alongside state and industry sponsorship. Texas A&M Innovation provides IP management, licensing and commercialization pathways across the system.
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