A5101777111- Advanced Photocatalysis Techniques
- Electrocatalysts for Energy Conversion
- Quantum Dots Synthesis And Properties
- Advanced Nanomaterials in Catalysis
- Perovskite Materials and Applications
- ZnO doping and properties
- Advancements in Battery Materials
- TiO2 Photocatalysis and Solar Cells
- Copper-based nanomaterials and applications
- Semiconductor materials and devices
- Advanced oxidation water treatment
- 2D Materials and Applications
- Gas Sensing Nanomaterials and Sensors
- Nanocluster Synthesis and Applications
- GaN-based semiconductor devices and materials
- Paleontology and Evolutionary Biology
- Evolution and Paleontology Studies
- Topological Materials and Phenomena
- Luminescence and Fluorescent Materials
- Adsorption and biosorption for pollutant removal
- Supercapacitor Materials and Fabrication
- Advanced biosensing and bioanalysis techniques
- Chalcogenide Semiconductor Thin Films
- Electrospun Nanofibers in Biomedical Applications
- Advanced Battery Materials and Technologies
Korea Basic Science Institute
2015-2025
Hanyang University
2024
Seoul National University
2018-2024
Chungnam National University
2022-2024
Pusan National University
2016
Stanford University
2011
Converting solar energy by photoelectrochemical water splitting has been regarded as a promising way to resolve the global crisis and alleviate environmental pollution. Silicon, which is earth-abundant narrow band gap, an attractive material for splitting. However, Si-based photoelectrodes suffer from photocorrosion, leads instability in electrolytes high overpotential. Herein, we have fabricated metal–insulator–semiconductor structure of NiOx/Ni/n-Si photoanodes highly efficient NiOx/Ni...
Various noble metal-free electrocatalysts have been explored to enhance the overall water splitting efficiency. Ni-based compounds attracted substantial attention for achieving efficient oxygen evolution reaction (OER) and hydrogen (HER) catalysts. Here, we show superior based on NiFe alloy electroformed by a roll-to-roll process. (oxy)hydroxide synthesized an anodization method OER catalyst shows overpotential of 250 mV at 10 mA cm–2, which is dramatically smaller than that bare with 380...
We suggest an easy one-step underwater plasma method to generate nanoporous N-doped TiO2(N-TiO2) photocatalysts with high reactivity in the visible light range. The extreme energy input of this technology allowed synthesis, crystallization, doping, and porosity TiO2 by inducing continuous reaction highly energetic atomic molecular species within a few minutes. produced N-TiO2 demonstrated anatase-brookite polycrystalline structure substitutionally doped N atoms. doping led narrow bandgap,...
In this study, we aimed to develop an absorbent for efficient removal of heavy metals. We developed a composite (BC-IOx) using biochar (BC) obtained by carbonizing rice hull, type biomass, and iron(III) nitrate nonhydrate (IO). The bonding strength between BC IO was increased through ultrasonication with high energy at 25 ℃ 2-h heat treatment process 350 ℃. Brunauer-Emmett-Teller analysis showed that BC-IOx had specific surface area, which proportional iron loading provided abundance active...
In this study, the decomposition efficiency and oxidation rate of organic pollutants were improved using a combination dielectric barrier discharge (DBD) plasma system Fe3O4 Fenton catalyst, representative advanced process (AOP). The combined showed >99 % degradation 200 mg L−1 dyes within 35 min, while other AOP systems achieved lesser same concentration in 40 min: no <25 Ozone(O3) system. Additionally, >92 tetracycline ciprofloxacin (TC, CIP: 10 L−1) was effectively degraded 5 contrast to...
A MnS/MnO-decorated S,N-doped carbon electrode was synthesized for advanced LIBs. This shows excellent cycling stability, with the material exhibiting superior performance. In situ XRD and XPS provided a fundamental understanding of material.
Abstract A novel interpenetrating network (IPN) based on poly(ethylene glycol) (PEG) and poly(acrylic acid) was developed its use as an artificial cornea evaluated in vivo . The results of a first set corneal inlays PEG‐diacrylate precursor showed inflammation the treated eyes haze corneas. insufficient biocompatibility could be correlated to poor long‐term stability implant caused by hydrolytic degradation over time. Adapting hydrogel chemistry replacing hydrolysable acrylate...
To promptly and simply create highly crystalline S/C co-doped TiO2 (SC-TiO2) photocatalysts at room temperature atmospheric pressure, we suggest a novel plasma-assisted sol-gel synthesis method. This method is simultaneous synthetic process, in which an underwater plasma undergoes continuous reactions to generate high-energy atomic molecular species that enable achieve crystallinity, large surface area, heterogeneous structure within few minutes. In particular, it was demonstrated the...
Large-sized and highly crystalline ceria nanorods show exceptional antioxidant activities effectively scavenge intracellular ROS without cell membrane penetration.
Abstract Structural and morphological control of crystalline nanoparticles is crucial in the field heterogeneous catalysis development “reaction specific” catalysts. To achieve this, colloidal chemistry methods are combined with ab initio calculations order to define reaction parameters, which drive chemical reactions desired crystal nucleation growth path. Key this procedure experimental verification predicted facets their corresponding electronic structure, case nanostructured materials...
BiVO4 has emerged as a promising photoanode for water oxidation. Technical barriers such charge recombination and photocorrosion prevent its practical application. In the present work, NiCo2O4 nanofiber cocatalyst with dual metal active sites was coupled to overcome limitations of surface sluggish oxidation kinetics. This unique morphology synthesized by facile hydrothermal technique. Photocorrosion during addressed conformal coating TiO2 on using simple spin-coating method....
In this study, to remove environmental pollutants, we used iron oxide incorporated carbide nanofiber (IOC) composites as heterogeneous catalysts for enhanced decomposition performance and heavy metal absorbents. IOCs were synthesized via electrospinning, a promising technique reliably producing continuous ultrathin nanofibers. The water-vapor-activated IOC (Act-IOC) showed high crystallinity of Fe3O4 nanoparticles large surface area (405.2 m2/g). During the water vapor activation process,...
Although metal-halide perovskite nanocrystals (NCs) have garnered significant attention for optoelectronic applications, the presence of electrically insulating organic ligands in CsPbBr
Osteopontin (OPN), an adhesive glycoprotein, has recently been proposed to act as opsonin that facilitates phagocytosis of neuronal debris by macrophages in the ischemic brain. The present study was designed elucidate process whereby OPN binds cell a rat model stroke. Significant co-localization protein and calcium deposits core were observed combining alizarin red staining immunohistochemistry. In addition, electron microscopy (EM) using osmium/potassium dichromate method revealed...
In this study, we applied iron (-oxide) incorporated carbide nanofiber composites as heterogeneous catalysts with wide visible-light absorption ability, catalytic reactivity, and stability for the highly efficient decomposition performance. Notably, water vapor activated catalyst (Act-Fe-CNF) showed high crystalline Fe3O4 phase, saturation magnetization point (17.76 emu/g), large surface area (508.2 m2/g). activation, Fe3C particles inside oxidized aggregated to larger particles, thereby...
We have applied correlative microscopy to identify the key constituents of a dorsal rib fossil from Koreanosaurus boseongensis and its hosting mudstone discovered at rich site in Boseong, South Korea, investigate factors that likely contributed diagenesis preservation bone. Calcite illite were commonly occurring phases bone, mudstone, boundary region in-between. The may bone once it fully formed by acting as protective shell. Fluorapatite crystals matrix signified diagenetic alteration...
We report a simple technique for the fabrication of dots-on-spheres (DoS) structures in which conjugated polymer dots (CPdots) are immobilized on surface silica spheres via charged interaction. Red-, green-, and blue-emissive polymers were synthesized employed to validate feasibility an approach develop DoS system with emission across visible range. The robust binding CPdots particles provides buffer resistance good stability photoirradiation mechanical agitation. Further bioconjugation is...