A5040720339- Environmental remediation with nanomaterials
- Nanomaterials for catalytic reactions
- Ammonia Synthesis and Nitrogen Reduction
- Advanced oxidation water treatment
- Adsorption and biosorption for pollutant removal
- Advanced Photocatalysis Techniques
- Radioactive element chemistry and processing
- Geochemistry and Elemental Analysis
- Microbial Fuel Cells and Bioremediation
- Arsenic contamination and mitigation
- Chromium effects and bioremediation
- Chemical Synthesis and Characterization
- Catalytic Processes in Materials Science
- Phosphorus and nutrient management
- Supercapacitor Materials and Fabrication
- Electrochemical sensors and biosensors
- Copper-based nanomaterials and applications
- Pharmaceutical and Antibiotic Environmental Impacts
- Water Quality Monitoring and Analysis
- Hydrogen Storage and Materials
- TiO2 Photocatalysis and Solar Cells
- Coal and Its By-products
- Electrochemical Analysis and Applications
- Microbial bioremediation and biosurfactants
- Minerals Flotation and Separation Techniques
Konkuk University
2016-2025
Konkuk University Medical Center
2019-2022
Government of the Republic of Korea
2019-2021
Gwangju University
2020
École Nationale Supérieure de Chimie de Rennes
2014-2015
Centre National de la Recherche Scientifique
2014-2015
Korea Advanced Institute of Science and Technology
2010-2015
Karlsruhe Institute of Technology
2015
École Normale Supérieure - PSL
2015
Changwon National University
1998
Nitrate (NO3-) is one of the most harmful contaminants in groundwater, and it causes various health problems. Bimetallic catalysts, usually palladium (Pd) coupled with secondary metallic catalyst, are found to properly treat nitrate-containing wastewaters; however, selectivity toward N2 production over ammonia (NH3) still requires further improvement. Because determined at nitrite (NO2-) reduction step on Pd surface, which occurs after NO3- decomposed into NO2- we here performed density...
A new hematite-supported Pd-Cu bimetallic catalyst (Pd-Cu/hematite) was developed in order to actively and selectively reduce nitrate (NO3(-)) nitrogen gas (N2). Four different iron-bearing soil minerals (hematite (H), goethite (G), maghemite (M), lepidocrocite (L)) were transformed hematite by calcination used for synthesis of Pd-Cu/hematite-H, G, M, L catalysts. Their characteristics identified using X-ray diffraction (XRD), specific surface area (BET), temperature programed reduction...
While most published studies used buffers to maintain the pH, there is limited knowledge regarding reactivity of nanoscale zerovalent iron (NZVI) in poorly buffered pH systems date. In this work, effect and Fe(II) dissolution on NZVI was investigated during reduction 4-nitrophenol (4-NP) unbuffered systems. The rate increased exponentially with respect concentration, ratio dissolved Fe(II)/initial related proportionally initial values, suggesting that lower (6-7) low loading may slow 4-NP...
In this study, we investigated catalytic nitrate removal using nanoscale zerovalent iron (NZVI) supported Cu–Pd bimetallic catalyst (Cu–Pd/NZVI) in a continuous reactor system. Control experiments showed that Cu, Pd, and proper supply of H2 are essential for relatively sustainable (30 mg/L NO3–-N) reduction mode. When optimized operational parameters to enhance efficiency N2 selectivity, finally achieved complete with 48% selectivity at 9 h. During longevity test (200 h reaction), excellent...
A novel quaternary composite (10-NT6/CC8) comprising a heterostructure 1D CdS and 2D SnS2 embedded with spatially separated redox cocatalysts (cobalt phosphate (CoPi) nickel phosphide (Ni2P)) was prepared by successive hydrothermal steps. The structural elemental characteristics have been investigated transmission electron microscopy, X-ray/ultraviolet photoelectron spectroscopy, UV–vis diffuse reflectance spectra, N2 adsorption–desorption isotherms. charge transfer at the interfaces...
Experiments were conducted to investigate the effect of riboflavin on reactivity nanoscale zerovalent iron (NZVI) during three reaction cycles carbon tetrachloride (CT) degradation. The degradation kinetics CT by NZVI without (0.556 ± 0.044 h–1) was 1.5 times higher than that with (0.370 0.012 in first cycle. Riboflavin rapidly reduced (65.0 7.0 degradation, resulting slow cycle due competition for electrons from between and CT. These results indicate is not effective as an electron shuttle...
Experimental and theoretical studies were conducted to identify the molecular-scale reaction mechanism for Cr(VI) removal by a ferrous phosphate mineral, vivianite. The surface-normalized rate constant in vivianite suspension at pH 7 was higher than those obtained other Fe(II)-containing minerals (i.e., magnetite pyrite). highest 5, which 35- 264-times 9, respectively, indicating dramatic acceleration of kinetics with decreasing suspension. X-ray photoelectron spectroscopy (XPS) absorption...