A5034416672- Membrane Separation Technologies
- Membrane Separation and Gas Transport
- Membrane-based Ion Separation Techniques
- Fuel Cells and Related Materials
- Food Quality and Safety Studies
- Advanced Sensor and Energy Harvesting Materials
- Photoacoustic and Ultrasonic Imaging
- Reservoir Engineering and Simulation Methods
- Graphene research and applications
- Hydraulic Fracturing and Reservoir Analysis
- Pesticide Exposure and Toxicity
- Electrohydrodynamics and Fluid Dynamics
- Electrospun Nanofibers in Biomedical Applications
- Thermography and Photoacoustic Techniques
- Extraction and Separation Processes
- Inflammasome and immune disorders
- Drilling and Well Engineering
- Electrocatalysts for Energy Conversion
- Flow Measurement and Analysis
- Oil and Gas Production Techniques
- Network Packet Processing and Optimization
- Parallel Computing and Optimization Techniques
- Molecular Junctions and Nanostructures
- Cholinesterase and Neurodegenerative Diseases
- Biopolymer Synthesis and Applications
University of Chile
2025
Korea University of Science and Technology
2021-2024
Korea Research Institute of Chemical Technology
2017-2024
University of Southern California
2009-2024
Southern California University for Professional Studies
2021-2023
Incheon National University
2023
Hansol Chemical (South Korea)
2022
Marshall B. Ketchum University
2022
Electronics and Telecommunications Research Institute
2021
Daejeon University
2021
Graphene is a distinct two-dimensional material that offers wide range of opportunities for membrane applications because ultimate thinness, flexibility, chemical stability, and mechanical strength. We demonstrate few- several-layered graphene oxide (GO) sheets can be engineered to exhibit the desired gas separation characteristics. Selective diffusion achieved by controlling flow channels pores via different stacking methods. For layered (3- 10-nanometer) GO membranes, tunable transport...
Doped carbon-based systems have been extensively studied over the past decade as active electrocatalysts for both two-electron (2e–) and four-electron (4e–) oxygen reduction reactions (ORRs). However, mechanisms ORR are generally poorly understood. Here, we report an extensive experimental first-principles theoretical study of at nitrogen-doped reduced graphene oxide (NrGO). We synthesize three distinct NrGO catalysts investigate their chemical structural properties in detail via X-ray...
Abstract Highly permselective and durable membrane materials have been sought for energy‐efficient C 3 H 6 /C 8 separation. Mixed‐matrix membranes (MMMs) comprising a polymer matrix metal–organic frameworks (MOFs) are promising candidates this application; however, rational matching of filler‐matrix is challenging their separation performances need to be further improved. Here, we propose novel strategy “defect engineering” in MOFs as an additional degree freedom design advanced MMMs. MMMs...
As water molecules permeate ultrafast through carbon nanotubes (CNTs), many studies have prepared CNTs‐based membranes for purification as well desalination, particularly focusing on high flux membranes. Among them, vertically aligned CNTs with ultrahigh been successfully demonstrated fundamental studies, but they lack scalability bulk production and sufficiently salt rejection. embedded in polymeric desalination membranes, i.e., polyamide thin‐film composite (TFC) can improve without any...
Numerous modified-carbon catalysts have been developed for the direct synthesis of hydrogen peroxide through electrochemical oxygen reduction. However, given complex structure most porous carbons and poor reduction reaction (ORR) selectivity typically observed when they are used as catalysts, it is still unclear which carbon defects responsible high two-electron ORR activity in these materials. Here, we study electrocatalytic formation nitrogen-doped reduced graphene oxide (N-rGO) materials...
Abstract Incorporation of defects in metal–organic frameworks (MOFs) offers new opportunities for manipulating their microporosity and functionalities. The so‐called “defect engineering” has great potential to tailor the mass transport properties MOF/polymer mixed matrix membranes (MMMs) challenging separation applications, example, CO 2 capture. This study first investigates impact MOF on membrane resultant MMMs separation. Highly porous defect‐engineered UiO‐66 nanoparticles are...
Polyvinylidene fluoride (PVDF) membranes, acclaimed for their outstanding chemical resistance, thermal stability, and mechanical properties, play a crucial role in diverse industrial purification applications. While various methods have been employed fabricating PVDF membranes such as thermally induced, evaporation-induced, vapor-induced, nonsolvent-induced phase separation processes, controlling the polarity of chains using these techniques remains challenging. Recent studies shown that...
Lactic acid is produced industrially from bacterial fermentation of carbohydrates (e.g., sugar, starch) followed by separation processes such as precipitation, distillation, and reactive extraction. However, these conventional are energy intensive. In this study, we report an integrated membrane process consisting ultrafiltration (UF) nanofiltration (NF) for lactic recovery broth, combined with ion exchange (IEX) vacuum-assisted evaporation. Most organic inorganic components in including...
Organic solvent nanofiltration (OSN) has made significant advances recently, and it is now possible to fabricate thin film composite (TFC) membranes with a selective layer thickness below 10 nm that gives ultrafast permeance. However, such high permeance inadvertently limited by the support membrane beneath layer, thus there an urgent need develop suitable maximize TFC performance. In this work, we employed commercially available polyethylene (PE) battery separator as porous performance OSN...
Biomedical gas exchange membranes used for blood oxygenation, including extracorporeal membrane oxygenators (ECMO) and artificial lung technology, have suffered from the insufficient hemocompatibility of materials. Despite over 50 years oxygenation (MO) technology development, a few hydrophobic materials are now available on market. Since nature promotes protein fouling which causes thrombus formation, various anti-thrombogenic anti-fouling coating techniques been applied to improve lifetime...
Summary Robust production forecasting allows for optimal resource recovery through efficient field management strategies. In hydraulically fractured unconventional reservoirs, the physics of fluid flow and transport processes is not well understood presence transitions between multiple regimes further complicate forecasting. An important goal operators to obtain a fast reliable forecast with minimal historical data. The abundance wells drilled in tight formations continuous data acquisition...
Continuing structure-activity studies were performed on the 2,3,4, 5-tetrahydro-1-(imidazol-4-ylalkyl)-1,4-benzodiazepine farnesyltransferase (FT) inhibitors. These demonstrated that a 3(R)-phenylmethyl group, hydrophilic 7-cyano and 4-sulfonyl group bearing variety of substituents provide low-nanomolar FT inhibitors with cellular activity at concentrations below 100 nM. Maximal in vivo mutated K-Ras HCT-116 human colon tumor model was achieved analogues carrying hydrophobic side chains such...
Nafion/polyvinylidene fluoride (PVDF) nanofibrous membranes with electrostatically negative charges on the fiber surface were fabricated via electrospinning superior water permeability and antifouling behaviors in comparison conventional microfiltration membranes. The diameter resultant pore size easily controlled through tailoring properties of solutions. electrospun Nafion/PVDF revealed high porosities (>80%) densities sulfonate groups membrane surface, leading to praiseworthy...
During biomass (e.g., waste wood chips) decomposition under an anaerobic fermentation process, organic acids such as acetic acid and butyric are continuously produced from controlled microbial activity. Since the accumulation of hinders metabolism in broths, should be removed by using appropriate separation processes. A few processes extraction, electrodialysis, distillation have been reported, but they still many limitations high energy input environmental problems toxic chemical...