A5072759580- Advanced Photocatalysis Techniques
- TiO2 Photocatalysis and Solar Cells
- Copper-based nanomaterials and applications
- Advanced Sensor and Energy Harvesting Materials
- Gas Sensing Nanomaterials and Sensors
- Carbon and Quantum Dots Applications
- Solar-Powered Water Purification Methods
- biodegradable polymer synthesis and properties
- ZnO doping and properties
- Thermochemical Biomass Conversion Processes
- Polymer composites and self-healing
- Electrocatalysts for Energy Conversion
- Nanoplatforms for cancer theranostics
- Advanced battery technologies research
- Catalysts for Methane Reforming
- Electrospun Nanofibers in Biomedical Applications
- Quantum Dots Synthesis And Properties
- Advanced Chemical Sensor Technologies
- Additive Manufacturing and 3D Printing Technologies
- Carbon dioxide utilization in catalysis
- Luminescence and Fluorescent Materials
- Nanocluster Synthesis and Applications
- Iron oxide chemistry and applications
- Surface Modification and Superhydrophobicity
- Microplastics and Plastic Pollution
Daegu Gyeongbuk Institute of Science and Technology
2015-2024
Korea Testing Laboratory
2023
Korea National University of Transportation
2016-2018
Daegu University
2014-2017
Government of the Republic of Korea
2016-2017
Kyungpook National University
2010-2014
Kyushu University
2009-2013
This study reports the synthesis and surface characterization of multi-walled carbon nanotubes (CNT), CdS, metal catalyst (M) hybrids (CdS/CNT/M), their novel application to photocatalytic hydrogen production under visible light (λ > 400 nm) in presence electron donor (Na2S Na2SO3). In binary between CNT CdS (CdS/CNT) annealed at 500 °C (h-CNT) has larger amount than crude (c-CNT) or acid-treated (a-CNT) due highly improved purity suitable work function. When hybridized with M, however,...
Proton-exchange-membrane water electrolysis (PEMWE) requires an efficient and durable bifunctional electrocatalyst for the hydrogen evolution reaction (HER) oxygen (OER). Herein, Ir-based is designed using high entropy alloy (HEA) platform of ZnNiCoIrX with two elements (X: Fe Mn). A facile dealloying in vacuum system enables construction a nanoporous structure crystallinity Zn as sacrificial element. Especially, Mn incorporation into HEAs tailors electronic Ir site, resulting d-band center...
A facile synthesis of high efficiency semiconductor photocatalyst hybrids is great importance in making the photocatalytic systems more viable and applicable. This study presents that simply reversing chemical precipitation order CdS results significantly different activity terms hydrogen production from water under visible light when hybridized with platinized TiO2 particles (Pt-TiO2). It has been found obtained via dropping an aqueous cadmium cation sulfide solution (i.e., Pt-TiO2...
Highly fluorescent and amphiphilic carbon quantum dots (CQDs) were prepared by microwave-assisted pyrolysis of citric acid 4,7,10-trioxa-1,13-tridecanediamine (TTDDA), which functioned as an A3 B2 polyamidation type monomer set. Gram quantities CQDs easily obtained within 5 min microwave heating using a household oven. Because the dual role TTDDA, both constituting surface passivation agent, TTDDA-based showed high fluorescence yield 29% solubility in various polar nonpolar solvents. These...
Hydrogen (H2) gas has recently become a crucial energy source and an imperative vector, emerging as powerful next-generation solution for fuel cells biomedical, transportation, household applications. With increasing interest in H2, safety concerns regarding personal injuries from its flammability explosion at high concentrations (>4%) have inspired the development of wearable pre-emptive monitoring platforms that can operate on curved jointed parts human body. In this study, yarn-type...
Polylactic acid (PLA) and polybutylene succinate (PBS) are gaining prominence as environmentally friendly alternatives to petroleum-based polymers due their inherent biodegradability. For textile applications, this research is focused on exploring the effects of PBS content rheological properties PLA/PBS blends characteristics blend fibers. fibers with varying contents (0 10 wt.%) were prepared using melt-blending spinning methods. Uniform morphologies indicated that was compatible PLA,...
Among the starting materials of thermoplastic polyurethanes (TPUs), it was confirmed that succinic acid-based polyester biopolyols having different molecular weights (Mn = 1000, 2000, and 4000) affect physicochemical properties final polymer significantly. Bio-TPUs synthesized through a solvent-free one-shot polymerization process were with polyol, 1,4 butanediol (BDO), 4,4'-methylene diphenyl diisocyanate (MDI) in molar ratio 1:1:2. As control group, one typical petroleum-based TPU...
An antibacterial continuous flow microreactor was successfully prepared by sequential mussel-inspired surface engineering of microchannels using catechol-grafted poly(N-vinylpyrrolidone) and immobilization near-infrared active Cs0.33WO3 nanoparticles inside the polydimethylsiloxane(PDMS)-based microreactors. Excellent phothothermal acitivity over 99.9% accomplished toward Gram-positive -negative bacteria upon irradiation during operation up to 30 days. This achieved without releasing from...
A colorimetric hydrogen sensor has great potential for accurately detecting and monitoring the leakage of gas on account its fast color change in contact with gas. However, practical application sensor, such as detection systems clothing, flexibility stability need to be improved. Here, we present a novel method fabricate flexible stable embedment sensing material. To improve polyacrylonitrile nanofiber containing palladium oxide zinc hybrid nanoparticles was prepared by electrospinning. The...
In the crystallisation of nanomaterials, an assembly-based mechanism termed 'oriented attachment' (OA) has recently been recognised as alternative crystal growth that cannot be explained by classical theory. However, attachment alignment during OA is not currently tuneable because its poorly understood. Here, we identify crystallographic disorder-order transitions in magnetite (Fe3O4) mesocrystals depending on types organic surface ligands building blocks, which produce different grain...
Abstract Polylactic acid (PLA) is a promising alternative to petroleum‐based polymers due its biodegradability. However, low mechanical properties in the presence of moisture are challenge for textile applications. In this study, we investigated effects two anti‐hydrolysis agents, an epoxy‐based agent (ADR) and aromatic carbodiimide‐based (ZIKA), on hydrolysis resistance PLA fibers. A melt‐spinning process was used prepare fibers by adding 0.3 0.5 wt% ADR ZIKA PLA. The topology ADR/PLA...
An effective strategy was designed and aimed at photocatalyst reusability with photocatalytic stabile performance. TiO<sub>2</sub> embedded carbon nanofibers optimized Pt photodeposition generated 3.5 μmol of hydrogen. The stability were also demonstrated.
Unique colloidal synthesis of monodispersed dumbbell shaped metal–Cu<sub>2</sub>S (M–Cu<sub>2</sub>S where M = Pt, FePt) HNs and their utilization in hydrogen production.