Publications by authors named "Hyeon-Gook Kim"

Thermoset epoxy resins are widely used in research and commercial applications. Zeolite imidazole framework-8 (ZIF-8), graphitic carbon nitride (GCN, g-CN), and S-doped graphitic carbon nitride (SCN, S-g-CN) composites were synthesized as accelerators and their effects on the physical properties of epoxies were examined. An ultrasound-assisted method was used to prepare ZIF-8/GCN and ZIF-8/SCN nanocomposites while g-CN and S-g-CN were prepared from the calcination of melamine and thiourea, respectively.

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The slow anodic oxygen evolution reaction (OER) significantly limits electrocatalytic water splitting for hydrogen production. We proposed the electrocatalyst for glucose oxidation by Ta-doping NiFe LDH nanosheets to simultaneously obtain glucaric acid (GRA) and hydrogen gas as a useful byproduct. Superior glucose oxidation reaction (GOR) activity is demonstrated by the optimized Ta-NiFe LDH, which has a low overpotential of 192 mV, allowing for a small Tafel slope of 70 mV dec and a current density of 50 mA cm.

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Carbon dioxide (CO) emissions are an important environmental issue that causes greenhouse and climate change effects on the earth. Nowadays, CO has various conversion methods to be a potential carbon resource, such as photocatalytic, electrocatalytic, and photo-electrocatalytic. CO conversion into value-added products has many advantages, including facile control of the reaction rate by adjusting the applied voltage and minimal environmental pollution.

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This study developed a safe and sustainable route for the epoxidation of cyclohexene using water as the source of oxygen at room temperature and ambient pressure. Here, we optimized the cyclohexene concentration, volume of solvent/water (CHCN, HO), time, and potential on the photoelectrochemical (PEC) cyclohexene oxidation reaction of the α-FeO photoanode. The α-FeO photoanode epoxidized cyclohexene to cyclohexene oxide with a 72.

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