한성환 교수

The CAMERE process (carbon dioxide hydrogenation to form methanol via a reverse-water-gas-shift reaction) was developed and evaluated. The reverse-water-gas-shift reactor and the methanol synthesis reactor were serially aligned to form methanol from CO 2 hydrogenation. Carbon dioxide was converted to CO and water by the reverse-water-gas-shift reaction (RWReaction) to remove water before methanol was synthesized. With the elimination of water by RWReaction, the purge gas volume was minimized as

Synthesis of TiO 2 nanowires directly on conductive and transparent glass substrates would be very useful for various applications such as photovoltaics and photocatalysis. Here, we report for the first time that single-crystalline TiO 2 nanowires can be synthesized on fluorine-doped tin oxide (SnO 2:F)-coated soda-lime glass substrates by chemical vapor deposition (CVD) at a temperature that is below the glass softening temperature (<530 °C). Moreover, we demonstrate that CdS nanorods with high

1-D array of Co₃[Fe(CN)₆]₂ film obtained by ion exchange mediated chemical transformation route from Co(CO₃)_0.35Cl_0.20(OH)_1.10 demonstrated an enhanced electrocatalytic oxidation of alkaline and neutral water.

High-density and single-crystalline CdS nanowire arrays were formed on fluorine-doped tin oxide (FTO)-coated soda-lime glass substrates without aid of templates at 220 °C. Bi was employed as a catalyst for the low-temperature growth of CdS nanowires via solution−liquid−solid (SLS) mechanism. CdS nanowires were very straight and they were ∼20−50 nm in diameter and ∼2−3 μm in length. CdS nanowires were in highly crystalline wurtzite structure, and their crystal growth direction was [001]. Careful

The present article demonstrates the use of low-cost electrochemically synthesized hydrophilic and nanocrystalline tin oxide film electrodes at room temperature in dye-sensitized solar cells and electrochemical supercapacitors. A mixed phase of tin instead of single phase composed of uniformly distributed irregular spherical grains in a nanometer regime scale was obtained. Tin oxide film electrode showed efficient photoperformance when subjected to dye-sensitized solar cells. The interfacial and

Amyloid-beta 42 (Aβ₄₂), the key biomarker of Alzheimer's disease (AD), aggregates to form neurotoxic amyloid plaques. In this work, we modified two fluorescein isothiocyanate-labeled Aβ₄₂-targeting peptides and designed an Aβ₄₂-specific ultrasensitive polyvalent-directed peptide polymer (PDPP) to enhance AD diagnosis sensitivity. The dissociation constant of Aβ₄₂ by PDPP was 10³-fold higher than the single-site-directed peptide. The improved

High-density and single-crystalline CdS nanowires were grown on fluorine-doped tin oxide (FTO)/soda-lime glass substrates using Bi catalysts via the so-called solution−liquid−solid (SLS) mechanism. Through a series of voltage loading steps, high-quality Cu(In,Ga)Se 2 (CIGS) light absorption layers were electrochemically deposited on the CdS window layers and subsequently selenized at 400 °C to form photovoltaic cells. Due to the one dimensionality and single crystallinity of the CdS nanowires, t

In order to enhance the capacitance of electrochemical capacitors, multiwalled carbon nanotubes (MWCNTs) and graphene nanosheets (GNS) were added to cobalt oxide (Co3O4) paste. The composite film based on Co3O4/MWCNT/GNS (95:4:1 wt%) exhibited a capacitance of 294 F/g while the capacitance of Co3O4/MWCNT (95:5 wt%) and pure Co3O4 film is 205 and 163 F/g, respectively. The enhanced capacitance of Co3O4/MWCNT/GNS composite film was attributed to the electrochemical contributions of the Co3O4 nanop