A5054644105- Zeolite Catalysis and Synthesis
- Membrane Separation and Gas Transport
- Mesoporous Materials and Catalysis
- Metal-Organic Frameworks: Synthesis and Applications
- Covalent Organic Framework Applications
- Graphene research and applications
- Membrane Separation Technologies
- Advanced ceramic materials synthesis
- Graphene and Nanomaterials Applications
- Advanced Sensor and Energy Harvesting Materials
- Ammonia Synthesis and Nitrogen Reduction
- Solar-Powered Water Purification Methods
- Boron and Carbon Nanomaterials Research
- Catalytic Processes in Materials Science
- Catalysts for Methane Reforming
- Energy Harvesting in Wireless Networks
École Polytechnique Fédérale de Lausanne
2021-2024
University of Minnesota
2020-2023
Twin Cities Orthopedics
2020
Minneapolis Institute of Arts
2020
Zeolite nanosheets can be used for the fabrication of low-defect-density, thin, and oriented zeolite separation membranes. However, methods manipulating their morphology are limited, hindering progress toward improved performance. We report direct synthesis (i.e., without using exfoliation, etching, or other top-down processing) flat MFI demonstrate use as high-performance membranes xylene isomer separations. Our were synthesized nanosheet fragments seeds instead previously nanoparticles....
Abstract Synthesis of a pentasil‐type zeolite with ultra‐small few‐unit‐cell crystalline domains, which we call FDP (few‐unit‐cell domain pentasil), is reported. made using bis‐1,5(tributyl ammonium) pentamethylene cations as structure directing agent (SDA). This di‐quaternary ammonium SDA combines butyl ammonium, in place the one commonly used for MFI synthesis, propyl and five‐carbon nitrogen‐connecting chain, six‐carbon connecting chain SDAs that are known to fit well within pores. X‐ray...
MFI zeolite nanosheet membranes exhibit high separation factor and flux for the of ammonia over hydrogen nitrogen hold promise industrial use. These also performance from hydrocarbons.
MFI twin crystals on b -axis oriented zeolite nanosheet films were suppressed in the presence of dihydroxybenzene isomers. The resulting presented an ultra-thin grain thickness 30–45 nm within hours.
A graphene oxide (GO)-based nanofiltration membrane was fabricated on ethylenediamine-functionalized-polyvinylidene fluoride (EDA-PVDF) hollow fibers. EDA-PVDF prepared by hydrothermal treatment of polyvinylidene (PVDF) with ethylenediamine (EDA). On the basis interaction oxygen-containing functional groups GO and amine fiber, a uniform layer can be formed in few seconds simple immersion EDA-cross-linked PVDF fiber aqueous solution. The thickness controlled from ∼20 nm to several micrometers...
The availability of a reliable and sufficient amount water constitutes one the Sustainable Development Goals set by United Nations. provision is still challenging in many regions world, especially arid semi-arid regions, where precipitations are rare there no access to bodies. We propose use harvesting device based on high-performance membranes produce from air decentralized way. presents single membrane stage increase purity vapor condenser liquid water. optimize operating conditions bring...
Metal-organic frameworks (MOFs) host intrinsically porous structure and rich structural chemical features. Several MOFs with pore aperture comparable to the size of gas molecules have attracted interest form selective layer membranes. Synthesis in nanosheet morphology is highly attractive for this because one can use highly-scalable filter coating make MOF However, conventional based processing route require several steps including centrifugation prepare a dispersion. Herein, we report...
The synthesis of high-performance gas-sieving zeolitic film is challenging because it involves seeded secondary growth which complex and difficult to reproduce. Additionally, expensive asymmetric inorganic porous supports are often needed for calcination the zeolite films. Herein, scalable preparation H2-sieving RUB-15 nanosheet films reported bypassing need supports. A novel, low-cost, thermally-robust, polybenzimidazole copolymer (PBI-AM Fumion®) support prepared allows deposition thin,...
Synthesis of H2-sieving membranes for high-temperature applications is highly desired improving the energy efficiency H2 production from steam reforming and developing a low-cost solution precombustion carbon capture. Zeolite-based are ideal this because they possess excellent hydrothermal stability. However, current methods to synthesize zeolite rely on synthesis expensive ceramic supports followed by postsynthetic functionalization shrink effective pore size. The scalable approach...
Abstract Synthesis of a pentasil‐type zeolite with ultra‐small few‐unit‐cell crystalline domains, which we call FDP (few‐unit‐cell domain pentasil), is reported. made using bis‐1,5(tributyl ammonium) pentamethylene cations as structure directing agent (SDA). This di‐quaternary ammonium SDA combines butyl ammonium, in place the one commonly used for MFI synthesis, propyl and five‐carbon nitrogen‐connecting chain, six‐carbon connecting chain SDAs that are known to fit well within pores. X‐ray...
Porous carbon films, attributed to their superior thermal and chemical robustness, are attractive for a number of applications. In the context molecular separation, major focus has been on films where effective pore diameter is lower than 1 nm, e.g., sieves. Only handful reports available hosting 2–3 nm size channels gas transport mainly takes place by Knudsen diffusion in contrast activated transport. Recently, we reported nanoporous (NPC) pyrolysis phase-separated block-copolymer/turanose...