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| 1 | Understanding the multifunctionality in Cu-doped BiVO_4 semiconductor photocatalyst显示文摘A visible light-induced, Cu-doped BiVO_4 photocatalyst was synthesized by a microwave hydrothermal method. The photocatalytic efficiency was investigated in the degradation of model water pollutants like Methylene Blue(dye) and ibuprofen(pharmaceuticals), as well as the inactivation of Escherichia coli(bacteria). The Cu-doped BiVO4 samples showed better efficiency than undoped BiVO_4, and the 1 wt.% Cu-doped BiVO_4 sample showed the best efficiency. The degradation of Methylene Blue reached 95%, while the degradation of ibuprofen reached 75%, and the inactivation of E. coli reached 85% in irradiation with visible light. The appearance of additional absorption band shoulders and widening of the optical absorption in the visible range makes the prepared powder an efficient visible light-driven photocatalyst. Moreover, the formation of an in-gap energy state just above the valance band as determined by density functional theory(DFT) first principle calculation, facilitates the wider optical absorption range of the doped system. Similarly, this in-gap energy state also acts as an electron trap, which is favorable for the efficient separation and photoexcited charge carriers' transfer process. The formation of oxygen vacancies due to doping also improved the separation of the charge carrier, which promoted the trapping of electrons and inhibited electron hole recombination, thus increasing the photocatalytic activity. No decrease in the efficiency of the 1 wt.% Cu-doped BiVO_4 photocatalyst in the degradation of ibuprofen over three consecutive cycles revealed the stability of the photocatalyst towards photocorrosion. These findings highlight the multifunctional applications of Cu-doped BiVO_4 in wastewater containing multiple pollutants. | Chhabilal Regmi Yuwaraj K.Kshetri Ramesh Prasad PANDey Tae-Ho Kim Gobinda Gyawali Soo Wohn Lee | 2019 | Journal of Environmental Sciences2019，31，1： | 12 |
| 2 | The effect of laser surface texturing on the tribological performance of different Sialon ceramic phases显示文摘A tribological performance was carried out on different types of hot press Sialon ceramics regarding the phases, i.e., the α-Sialon phase, the β-Sialon phase, and the α/β-Sialon composite phase. The different phases of Sialon ceramics were analyzed by XRD patterns. For the tribological performance, the Sialon ceramics were laser textured and the starved lubrication method was applied with different dimple pitches under a load of 10 N at room temperature. The material having a dimple pitch of 200 mm shows the lowest coefficient of friction. The α/β-Sialon composite phase shows the least coefficient of friction i.e. 0.04 and 0.1 for the textured and polished(without being textured) samples, respectively. The Sialon ceramics show mild wear and therefore, the wear rate of the steel ball(mating partner) was taken into account for the wear analysis. The α-Sialon phase having a higher hardness shows the least wear in comparison to the α/β-Sialon composite phase and the β-Sialon phase. | Bhupendra Joshi Khagendra Tripathi Gobinda Gyawali Soo Wohn Lee | 2016 | Progress in Natural Science:Materials International2016，26，4： | 8 |
| 3 | Fabrication and Characterization of Electrodeposited Ni-SiC-h/BN Composite Coatings显示文摘Ni—SiC—h/BN composite materials were prepared by electrodeposition technique with the dispersion of SiC(10 g/L) and h/BN nanosheets(10 g/L) in a nickel sulfamate electrolytic bath.Different ratio of sodium dodecyl sulfate(SDS) and cetyltrymethyl ammonium bromide(CTAB) surfactants were used to evaluate the effect of surfactants on the properties of the electrodeposited composite coatings.The coating samples were characterized by scanning electron microscopy,X-ray diffraction,Vickers microhardness test,scratch and tribology tests.The results revealed that the co-deposition of nanoparticles was significantly influenced by surfactants during electrodeposition process.Pyramidal or polyhedral nickel crystallites were observed at higher ratio of SDS/CTAB while smaller oval grains with refined surface morphologies were obtained at lower ratio of SDS/CTAB surfactants.In addition,wt%of particles co-deposition was increased,and Vickers microhardness,wear and coefficient of friction of the electrodeposited composite coatings were improved at increased CTAB and decreased SDS contents in the electrolyte during electrodeposition process. | Gobinda Gyawali Hyung-Suk Kim Khagendra Tripathi Tae-Ho Kim Soo Wohn Lee | 2014 | Journal of Materials Science & Technology2014，30，8： | 4 |
| 4 | Luminescence properties of Eu^(2+),Gd^(3+) and Pr^(3+) doped translucent Sialon phosphors显示文摘Optical properties of hot pressed Sialon ceramics doped with different rare earth oxides(REOs) i.e. Eu2O3, Gd2O3, and Pr2O3 were investigated. The α-Sialon phase was the main phase obtained after sintering as observed by X-ray diffraction(XRD). The transparency of different samples of varying thickness measured from UV to IR region revealed that the samples were translucent in the visible region while transparent in IR region. The thin samples of 150 μm thickness had transmittance as high as 30% in the visible region. The luminescence was observed in transmittance mode to investigate the effect of sample thickness on luminescence intensity. We observed blue, yellow and red emissions in Sialon doped with Gd2O3, Eu2O3, and Pr2O3, respectively. The excitation wavelength for Gd2O3 and Pr2O3 doped samples were in UV region i.e. 280 and 270 nm, respectively, whereas, for Eu2O3 doped samples was in the blue region(460 nm). The Eu2O3 doped Sialon having 300 μm thickness showed better white light extraction as coupled with blue LED. Moreover, the fabricated phosphor samples exhibited high hardness around 20 GPa and fracture toughness above 5 MPa·m1/2. | Bhupendra Joshi Soo Wohn Lee | 2015 | Journal of Rare Earths2015，33，11： | 3 |
| 5 | Effect of Pulse and Direct Current Electrodeposition on Microstructure,Surface,and Scratch Resistance Properties of Ni-W Alloy and Ni-W-SiC Composite Coatings显示文摘The present work aims to study the influence of direct current and pulse current techniques as well as embedded SiC nanoparticles on the mechanical properties of the electrodeposited Ni-W coating.The electrodeposited coatings were studied for morphological,microstructural,mechanical,and scratch resistance properties using the surface roughness tester,scanning electron microscopy,energy-dispersive X-ray spectroscopy,X-ray diffraction,Vickers microhardness,and scratch tester.Application of pulse current exhibited relatively homogeneous and smooth surface of the coatings.A remarkable increment of microhardness was observed in both Ni-W and Ni-W-SiC coatings prepared under pulse current as compared to the direct current technique.Similarly,the scratch test revealed a considerable improvement in the scratch resistance behavior of the Ni-W alloy and the composite coatings from the pulsed current condition.Hence,the application of pulse current not only improved the surface-and microstructure-related properties but also enhanced the Vickers microhardness and scratch resistance properties of the coatings.In addition,the reduction in micro-cracks revealed the improvement in scratch resistance properties of the coatings due to the incorporated SiC nanoparticles into the Ni-W alloy matrix. | Sami Bin Humam Gobinda Gyawali Dhani Ram Dhakal Jin-Hyuk Choi Soo Wohn Lee | 2020 | Acta Metallurgica Sinica(English Letters)2020，33，10： | 2 |
| 6 | Depth from focus using a pyramid architecture 显示文摘 | DARRELL T WOHN K | 1990 | Pattern Recognition Letters1990，11，12： | 1 |
| 7 | Seoul national university dismisses hwang 显示文摘 | Yvette Wohn | 2006 | Science2006，311，： | 1 |
| 8 | Influence of feedstock and spraying parameters on the depositing efficiency and microhardness of plasma-sprayed zirconia coatings 显示文摘 | Chen Huang Lee Soo Wohn Du Hao Ding Chuan Xian Choi Chul Ho | 2004 | Materials Letters2004，58，： | 1 |
| 9 | Prophylactic phenytoin in severe head injuries显示文摘 | Wohns RN Wyler AR | 1979 | J Neurosurg1979，51，4： | 1 |
| 10 | Tracking and motion estimation of the articulated object显示文摘 | Jung S Wohn K | 1997 | A Hierarchical Kalman Filter Approach1997，3，6： | 1 |
| 11 | Molecular crosstalk between adhesion receptors and proteolytic cascades in vascular remodelling 显示文摘 | Preissner KT May AE Wohn KD | 1997 | Thromb Haemost1997，78，： | 1 |
| 12 | Influence of feedstock and spraying parameters on the depositing efficiency and microhardness of plasma-sprayed zirconia coatings显示文摘 | Chen Huang Soo Wohn Lee Du Hao | 2004 | Mater Lett2004，58，78： | 1 |
| 13 | Ground-state β branching of gaseous fission products and their daughters for A= 88-91 显示文摘 | WOHN F K GLASCOCK M D TALBERT W L Jr | 1976 | Physical Review C1976，13，6： | 1 |
| 14 | Photocatalytic decomposition of benzene with plasma sprayed TiO2-based coatings on foamed aluminum显示文摘 | Chen Huang Lee Soo Wohn Kim Tae Ho | | 0，，12： | 1 |
| 15 | Er 3+ /Yb 3+ co-doped bismuth molybdate nanosheets upconversion photocatalyst with enhanced photocatalytic activity显示文摘 | Rajesh Adhikari Gobinda Gyawali Sung Hun Cho R. Narro-García Tohru Sekino Soo Wohn Lee | 2014 | Journal of Solid State Chemistry2014，，： | 1 |
| 16 | The Current Use of Impella 2.5 in Acute Myocardial Infarction Complicated by Cardiogenic Shock: Results from the USpella Registry显示文摘 | WILLIAM W. O’NEILL THEODORE SCHREIBER DAVID H. W. WOHNS CHARANJIT RIHAL SRIHARI S. NAIDU ANDREW B. CIVITELLO SIMON R. DIXON JOSEPH M. MASSARO BRIJESHWAR MAINI E. MAGNUS OHMAN | 2014 | J. Int. Cardiol2014，，： | 1 |
| 17 | Electrodeposited Ni-W-TiC Composite Coatings:Effect of TiC Reinforcement on Microstructural and Tribological Properties显示文摘Ni-W-TiC composite coatings were prepared via electrodeposition technique by dispersing the different amount of TiC particles into the plating bath.The Ni-W and Ni-W-TiC composite coatings containing different concentrations of TiC particles were characterized by using the scanning electron microscope,X-ray diffraction technique,Vickers microhardness test,surface roughness test,and tribology test.The results show that the Ni-W coatings containing reinforced TiC particles have shown a typical FCC Ni-W crystal structure with significantly higher Vickers microhardness.The amount of dispersed TiC particles into the plating bath considerably affected codeposition weight percent of TiC into the Ni-W matrix,as revealed by the EDS analysis.Ni-W-TiC samples demonstrated the decreased abrasive wear as compared to Ni-W coating and no characteristic features observed for the adhesive wear.Similarly,an improvement in coefficient of friction was observed in Ni-W-TiC composite coating as compared to Ni-W coating. | Jin Hyuk Choi Gobinda Gyawali Dhani Ram Dhakal Bhupendra Joshi Soo Wohn Lee | 2020 | Acta Metallurgica Sinica(English Letters)2020，33，4： | 1 |
| 18 | Study on Porosity of Plasma-Sprayed Coatings by Digital Image Analysis Method显示文摘 | Du H Heyg J Wohn Lee S | | 0，，04： | 1 |
| 19 | Low damped cloth simulation 显示文摘 | Oh Seungwoo Ahn Junghyun Kwangyun Wohn | 2006 | The Visual Computer2006，22，2： | 1 |
| 20 | A model based 3D tracking of rigid objects from a sequence of multiple perspective views显示文摘 | Jung S K Wohn K Y | 1998 | Pattern Recognition on Letters1998，，19： | 1 |
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