A5065568852- Catalytic Processes in Materials Science
- Catalysis and Oxidation Reactions
- Advanced Photocatalysis Techniques
- TiO2 Photocatalysis and Solar Cells
- Electrocatalysts for Energy Conversion
- Surface Modification and Superhydrophobicity
- Advanced Chemical Physics Studies
- Catalysts for Methane Reforming
- Organic Electronics and Photovoltaics
- Nanocluster Synthesis and Applications
- nanoparticles nucleation surface interactions
- Semiconductor materials and devices
- Gas Sensing Nanomaterials and Sensors
- Conducting polymers and applications
- Advanced Sensor and Energy Harvesting Materials
- Graphene research and applications
- ZnO doping and properties
- Nanomaterials for catalytic reactions
- Catalysis and Hydrodesulfurization Studies
- Advanced Nanomaterials in Catalysis
- Ammonia Synthesis and Nitrogen Reduction
- Perovskite Materials and Applications
- Quantum Dots Synthesis And Properties
- Diamond and Carbon-based Materials Research
- Mesoporous Materials and Catalysis
Sungkyunkwan University
2016-2025
Suwon Research Institute
2011-2021
Government of the Republic of Korea
2015-2021
Korea Research Institute of Chemical Technology
2013-2016
University of Twente
2014
Korea Institute of Materials Science
2010-2014
Ewha Womans University
2005-2007
University of Konstanz
2003-2006
Ewha Womans University Medical Center
2006
Virginia Commonwealth University
2003-2004
This work reports the synthesis and application of metal-organic framework (MOF)@microporous organic network (MON) hybrid materials. Coating a MOF, UiO-66-NH2, with MONs forms microporous materials hydrophobic surfaces. The original UiO-66-NH2 shows good wettability in water. In comparison, MOF@MON float on water show excellent performance for adsorption model compound, toluene, Chemical etching MOF results formation hollow MON
Using ultraviolet photoelectron spectroscopy, we provide direct experimental evidence that di-oxygen species are stable on anionic gold dimer and tetramer clusters at room temperature. The stabilization of molecular oxygen is crucial for the high activities low-temperature reactions catalysts.
Abstract The exact understanding for each promotional role of cation and anion vacancies in bifunctional water splitting activity will assist the development an efficient activation strategy inert catalysts. Herein, systematic first‐principles computations demonstrate that synergy anion–oxygen cation–manganese ( V O Mn ) manganese dioxide (MnO 2 nanosheets results abnormal local lattice distortion electronic modulation. Such alterations enrich accessible active centers, increase...
Abstract Currently, conventional dimethoxymethane synthesis methods are environmentally unfriendly. Here, we report a photo-redox catalysis system to generate using silver and tungsten co-modified blue titanium dioxide catalyst (Ag.W-BTO) by coupling CO 2 reduction CH 3 OH oxidation under mild conditions. The Ag.W-BTO structure its electron hole transfer comprehensively investigated combining advanced characterizations theoretical studies. Strikingly, achieve record photocatalytic activity...
Electrocatalytic reduction of CO 2 into high energy‐density fuels and value‐added chemicals under mild conditions can promote the sustainable cycle carbon decrease current energy environmental problems. Constructing electrocatalyst with activity, selectivity, stability, low cost is really matter to realize industrial application electrocatalytic (ECR). Metal–nitrogen–carbon (M–N–C), especially Ni–N–C, display excellent performance, such as nearly 100% density, outstanding tolerance, etc.,...
Mesoporous silica with mean pore size of ∼14 nm was coated by polydimethylsiloxane (PDMS) using a thermal deposition method. We showed that the inner walls pores larger than ∼8 can be thin layers PDMS, and surfaces consisting PDMS-coated were superhydrophobic, water contact angles close to 170°. used as adsorbents various gas-phase chemical warfare agent (CWA) simulants. allowed molecular desorption CWA simulants even after exposure under highly humid conditions and, therefore, is applicable...
In order to induce greater light absorption, nano-patterning is often applied the metal-oxide buffer layer in inverted bulk-heterojunction(BHJ) solar cells. However, current homogeneity was significantly disturbed at interface, leading an efficiency that not fully optimized. this work, additional PC61BM inserted between ZnO ripple and photoactive enhance electron extraction. The insertion of provided substantial advantages operation BHJ cells; specifically, it enhanced lowered accumulation...
Using a novel polymer (polythienothiophene-co-benzodithiophenes 7 F-20) as donor and phenyl-C71-butyric acid methyl ester an acceptor of bulk heterojunction, inverted organic photovoltaics (OPVs) were fabricated. Wet-chemically prepared ZnO poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) used buffer layers. Particularly, for PEDOT:PSS deposition, no annealing step was employed. This OPV showed power conversion efficiency (PCE) ∼7.0%, which is comparable to the hitherto...
The reverse water gas shift (RWGS) reaction catalyzed by barium zirconate-based perovskite-type catalysts doped with Y, Zn, and Ce was investigated in terms of activities chemical stabilities various catalysts. All the showed stable performances for RWGS at 600 °C 5 h, particular, BaZr0.8Y0.16Zn0.04O3 (BZYZ) catalyst an outstanding activity average CO2 conversion 37.5% a CO selectivity 97%. Insertion additional into BZYZ structure did not have any positive effect on catalytic reaction, even...
We report a versatile and simple two-step method for fabricating superhydrophobic films with optical transparency. Silica nanoparticles were coated hydrophobic PDMS thin layer subsequently fixed onto adhesive surfaces. The water contact angle on the prepared surface was over 150°, which implies that is highly repellent to water. transparent nature of fabricated its high chemical physical stability also demonstrated. Our simple, cost-effective, environment friendly applicable large scale.
The challenge of achieving efficient photocatalytic H2 production from water splitting without sacrificial agents remains a significant hurdle. Herein, we demonstrate that the dual doping Cu/Co single atoms on Li-reduced blue TiO2 (Cu–Co SA/BTO) can effectively modulate charge separation photogenerated carriers during pure splitting. Remarkably, evolution rate Cu–Co SA/BTO achieves remarkable value 1238.15 μmol·g–1·h–1, surpassing BTO by 11 times. Particularly, femtosecond transient...
Au nanoparticles grown on mildly sputtered Highly Ordered Pyrolytic Graphite (HOPG) surfaces were studied using Scanning Tunneling Microscopy (STM) and X-ray Photoelectron Spectroscopy (XPS). The results compared with those of Ag the same substrate. By varying defect densities HOPG coverages, one can create in various sizes. At high structures films significantly deviate from ideal truncated octahedral form: existence many steps between different atomic layers be observed, most likely due to...