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Development of Cd-doped Co Nanoparticles Encapsulated in Graphite Shell as Novel Electrode Material for the Capacitive Deionization Technology

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Nano-Micro Letters 2013年第4期5卷 303-313页

作者： Nasser A.M.Barakat Khalil Abdelrazek Khalil Ahmad G.El-Deen hak yong kim Organic Materials and Fiber Engineering Department Chonbuk National University Chemical Engineering Department Minia University Mechanical Engineering Department (NPST) King Saud University Dept of Bionano System Engineering College of Engineering Chonbuk National University

Because of the low energy requirement and the environmentally safe byproducts, the capacitive deionization water desalination technology has attracted the attention of many researchers. The important requirements for electrode materials are good electrical conductivity, high surface area, good chemical stability and high specific capacitance. In this study, metallic nanoparticles that are encapsulated in a graphite shell(Cd doped Co/C NPs) are introduced as the new electrode material for the capacitive deionization process because they have higher specific capacitance than the pristine carbonaceous materials. Cd doped Co/C NPs perform better than graphene and the activated carbon. The introduced nanoparticles were synthesized using a simple sol gel technique. A typical sol gel composed of cadmium acetate, cobalt acetate and poly(vinyl alcohol)was prepared based on the polycondensation property of the acetates. The physiochemical characterizations that were used confirmed that the drying, grinding and calcination in an Ar atmosphere of the prepared gel produced the Cd doped Co nanoparticles, which were encapsulated in a thin graphite layer. Overall, the present study suggests a new method to effectively use the encapsulated bimetallic nanostructures in the capacitive deionization technology.

关键词： Capacitive deionization Water desalination Bimetallic nanoparticles Specific capacitance

Synthesis and Electrical Properties of TiO_2 Nanoparticles Embedded in Polyamide-6 Nanofibers Via Electrospinning

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Nano-Micro Letters 2011年第1期3卷 56-61页

作者： R.Nirmala Jin Won Jeong R.Navamathavan hak yong kim Bio-nano System Engineering Chonbuk National University Department of Organic Materials and Fiber Engineering Chonbuk National University Center for Healthcare Technology & Development Chonbuk National University School of Advanced Materials Engineering Chonbuk National University

We report on the synthesis and characterizations of TiO2 nanoparticles embedded in polyamide-6composite nanofibers by using electrospinning technique. The influence of substrate on the electrical characteristics of polyamide-6/TiO2 composite nanofibers was investigated. The resultant nanofibers exhibit good incorporation of TiO2 nanoparticles. The doping of TiO2 nanoparticles into the polyamide-6 nanofibers were confirmed by high resolution transmission electron microscopy and energy dispersive X-ray spectroscopy. Photoluminescence（PL） and cathodoluminescence（CL） spectroscopy were also used to characterize the *** PL and CL spectra reveal that the as-spun polyamide-6/TiO2 composite nanofibers consisted of overlapping of two broad emission bands due to the contribution of polyamide-6（centered at about 475 nm）, which might originate from organic functional groups of polyamide-6 and TiO2 nanoparticles（centered around 550 nm）. The electrical conductivity of the polyamide-6/TiO2 composite nanofibers on different substrates was carried *** was found that the electrical conductivity of the polyamide-6/TiO2 composite nanofibers on silicon substrate was in the range of 13 μA, and about 1 to 20 p A for the paper and glass substrates.

关键词： Electrospinning Polyamide-6 Nanoparticles Nanofibers Electrical studies

Hierarchical TiO_2/ZnO Nanostructure as Novel Non-precious Electrocatalyst for Ethanol Electrooxidation

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Journal of Materials Science & Technology 2015年第1期31卷 97-105页

作者： Gehan M.K.Tolba Nasser A.M.Barakat A.M.Bastaweesy E.A.Ashour Wael Abdelmoez Mohamed H.El-Newehy Salem S.Al-Deyab hak yong kim Organic Materials and Fiber Engineering Department Chonbuk National University Chemical Engineering Department Faculty of EngineeringMinia University BioNanosystem Department Chonbuk National University Department of Chemistry College of ScienceKing Saud University

Metal oxides have a higher chemical stability in comparison to metals,so they can be utilized as electrocatalysts if the activity could be *** the composition,the morphology of the nanostructures has a considerable impact on the electrocatalytic *** this work,zinc oxide nano branches-attached titanium dioxide nanofibers were investigated as an economic and stable catalyst for ethanol electrooxidation in the alkaline *** introduced material has been synthesized by electrospinning process followed by hydrothermal ***,electrospinning of colloidal solution consisting of titanium isopropoxide,poly（vinyl acetate） and zinc nanoparticles was performed to produce nanofibers embedding solid *** order to produce TiO2nanofibers containing ZnO nanoparticles,the obtained electrospun nanofiber mats were calcined in air at 600 °*** formed ZnO nanoparticles were exploited as seeds to outgrow ZnO branches around the TiO2nanofibers using the hydrothermal technique at sub-critical water conditions in the presence of zinc nitrate and bis-hexamethylene *** morphology of the final product,as well as the electrochemical measurements indicated that zinc nanoparticles content in the original electrospun nanofibers has a significant influence on the electrocatalytic activity as the best performance was observed with the nanofibers synthesized from electrospun solution containing 0.1 g Zn,and the corresponding current density was 37 mA/***,this study paves a way to titanium dioxide to be exploited to synthesize effective and stable metal oxide-based electrocatalysts.

关键词： Direct ethanol fuel cells Electrospinning Nanofibe

Development of IEC61850 Based Substation Engineering Tools with IEC61850 Schema Library

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Smart Grid and Renewable Energy 2011年第3期2卷 271-277页

作者： yong hak kim Jeon Yeol Han You Jin Lee yong Ho An In Jun Song 不详

IEC 61850 allows the replacement of conventional wire based systems to communication based system with local area network. Since new engineering processes are introduced in substation, the specifications and tools are required combined with new skills across the substation engineering. In order to construct the IEC 61850 based substation automation system, the IED engineering tools as an engineering means are necessary to cope with the substation automation by full digital devices in the real power systems. Compared the configuration tools provided IEDs vendors which are able to support the operation and communication analysis between IEDs, the XML based IED integration engineering tools as substation engineering tools which are developed can build, edit and save the ICD, SCL and CID files. Particularly, the substation engineering tools are possible to apply the IEC 61850 based IEDs for the engineering process of systems and also provide the reliability and efficiency of system for the utilities and manufacturers. The developed tools are applied to test and create the SCL files for domestic-made IEDs, and then compared with the conventional tools. The reliability including accuracy of results was proved.

关键词： IEC 61850 Substation Engineering Tools IEC 61850 Schema Library Substation Automation System

Comprehensive molecular characterization to predict immunotherapy response in advanced biliary tract cancer:a phase II trial of pembrolizumab

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Oncology Research 2025年第1期33卷 57-65页

作者： RYUL kim JOO KYUNG PARK MINSUK KWON MINAE AN JUNG yong HONG JOON OH PARK SUNG HEE LIM SEUNG TAE kim Division of Hematology-Oncology Department of MedicineSamsung Medical CenterSungkyunkwan University School of MedicineSeoulKorea Division of Gastroenterology Department of MedicineSamsung Medical CenterSungkyunkwan University School of MedicineSeoulKorea Department of Hematology-Oncology Ajou University School of MedicineSuwon-siGyeonggi-doKorea Samsung Advanced Institute of Health Science and Technology Sungkyunkwan University School of MedicineSeoulKorea

Background:Immune checkpoint inhibitors(ICIs)are effective in a subset of patients with metastatic solid ***,the patients who would benefit most from ICIs in biliary tract cancer(BTC)are still *** and methods:We molecularly characterized tissues and blood from 32 patients with metastatic BTC treated with the ICI pembrolizumab as second-line ***:All patients had microsatellite stable(MSS)type *** of the 32 patients achieved partial response(PR),with an objective response rate(ORR)of 9.4%(95%confidence interval[CI],2.0–25.2)and nine showed stable disease(SD),exhibiting a disease control rate(DCR)of 37.5%(95%CI,21.1–56.3).For the 31 patients who had access to PD-1 ligand 1(PD-L1)combined positive score(CPS)testing(cut-off value≥1%),the ORR was not different between those who had PD-L1-positive(PD-L1+;1/11,9.1%)and PDL1-(2/20,10.0%)tumors(p=1.000).The tumor mutational burden(TMB)of PD-L1+BTC was comparable to that of PD-L1-BTC(p=0.630).TMB and any exonic somatic mutations were also not predictive of pembrolizumab *** analysis of blood and tumor samples demonstrated a relatively high natural killer(NK)cell proportion in the peripheral blood before pembrolizumab treatment in patients who achieved tumor ***,the tumors of these patients presented high enrichment scores for NK cells,antitumor cytokines,and Th1 signatures,and a low enrichment score for cancer-associated ***:This study shows the molecular characteristics associated with the efficacy of pembrolizumab in BTC of the MSS type.

关键词： Pembrolizumab Whole-exome sequencing Whole-transcriptome sequencing Biliary tract cancer

Prominent cycling reversibility and kinetics enabled by CaTiO3 protective layer on Zn metal for aqueous Zn-ion batteries

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Journal of Energy Chemistry 2025年第1期100卷 245-258页

作者： Gaeun Lee yong Nam Ahn Seongjoon So Chanwoo Park Jong-Seong Bae Taehyun Park Il Tae kim Jaehyun Hur School of Chemical Biological and Battery Engineering Gachon University Seongnam Busan Center Korea Basic Science Institute

Aqueous Zn-ion batteries （AZIBs） have received considerable attention owing to their various advantages such as safety,low cost,simple battery assembly conditions,and high ionic ***,they still suffer from serious problems,including uncontrollable dendrite growth,corrosion,hydrogen evolution reaction （HER） from water decomposition,electrode passivation,and unexpected *** creation of a uniform artificial nanocrystal layer on the Zn anode surface is a promising strategy for resolving these ***,we propose the use of a perovskite CaTiO3（CTO） protective layer on Zn（CTO@Zn） as a promising approach for improving the performance of *** CTO artificial layer provides an efficient pathway for Zn ion diffusion towards the Zn metal because of the high dielectric constant （εr=180） and ferroelectric characteristics that enable the alignment of dipole moments and redistribute the Zn2+ions in the CTO *** avoiding the direct contact of the Zn anode with the electrolyte solution,the uneven dendrite growth,corrosion,parasitic side reactions,and HER are mitigated,while CTO retains its mechanical and chemical robustness during ***,CTO@Zn demonstrates an improved lifespan in a symmetric cell configuration compared with bare ***@Zn shows steady overpotential （～68 m V） for 1500 h at 1 mA cm-2/0.5 mA h cm-2,excelling bare ***,when paired with the V2O5-C cathode,the CTO@Zn//V2O5-C full battery delivers 148.4 mA h g-1（based on the mass of the cathode） after 300 *** study provides new insights into Zn metal anodes and the development of high-performance AZIBs.

关键词： Perovskite

Experimental study on the characteristics of DBD plasma coal liquefaction by using coal nanopowder

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Plasma Science and Technology 2019年第11期21卷 86-92页

作者： Song Chol PAK Kuk Song HAN yong Jun kim hak Chol CHOE Faculty of Physical Science Kimchaek University of Technology

A new method for liquefying coal using dielectric barrier discharge plasma has been *** utilizing waste oil as the solvent and processing coal nano powder in the plasma for 10 min,we have attained a liquid yield of more than 80%.The experiment shows that not only the coal nanopowder promoted the liquefaction process,but hydrogen radicals improved the liquid yield *** the plasma processing,the phenomenon of the changing color of the nanopowder solution and not producing a solid residue has been obviously *** rational parameters that affected the liquefaction of coal nanopowder have been achieved through the experiment,and the liquefied products have been analyzed.

关键词： liquefaction DBD plasma coal nanopowder

Fabrication of Barrier Ribs for PDP by Capillary Infiltration Process and Their Sintering Behavior

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Journal of Rare Earths 2004年第Z2期22卷 98-101页

作者： Tae Jung Tang hak Nynu Choi Chan Hyoung Kang yong Seog kim Department of Materials Science and Engineering Hongik UniversitySeoul 121-791Korea Department of Materials Science and EngineeringHongik UniversitySeoul 121-791Korea Department of Advanced Materials EngineeringKorea Polytechnic University Shihung-CityKyonggi-DoKorea Department of Materials Science and EngineeringHongik UniversitySeoul 121-791Korea

Closed-cell type barrier ribs such as meander, honeycomb, SDR, and waffle types were produced using capillary molding process. Sintering of the ribs revealed that the ribs with asymmetric geometry such as meander and SDR type became distorted severely by the sintering process, but the ribs with symmetric geometry such as honeycomb and waffle type maintained their green state morphology. After sintering, the ribs were coated with green phosphor using osmosis coating process and its luminance characteristics were evaluated. The results indicated that the luminance and its efficiency is improved by using closed-cell type ribs with the new phosphor forming technology.

关键词： PDP close celled barrier ribs sintering distortion

Triolein emulsion infusion into the hepatic artery increases vascular permeability to doxorubicin in rabbit liver

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World Journal of Gastroenterology 2021年第2期27卷 152-161页

作者： yong-Woo kim hak Jin kim Byung Mann Cho Seon Hee Choi Department of Radiology Research Institute for Convergence of Biomedical Science and TechnologyPusan National University Yangsan HospitalPusan National University College of MedicineYangsan 50612South Korea Department of Radiology Biomedical Research InstitutePusan National University HospitalPusan National University College of MedicineBusan 49241South Korea Preventive Medicine and Occupational Medicine Pusan National University School of MedicineYangsan 50612South Korea Department of Radiology Pusan National UniversityBusan 49241South Korea

BACKGROUND The infusion of triolein emulsion(TE)induced increased vascular permeability and a negligible and temporary decrease in liver function without specific histopathological *** To assess changes in doxorubicin concentration according to the percentage of TE infused via a hepatic artery to study the vascular permeability in the rabbit *** Thirty-nine healthy rabbits were divided into five groups according to the concentration of emulsified triolein infused into the hepatic arteries:Group 0,saline infusion(control group,n=5);group 1,0.3%TE(n=13);group 2,0.6%TE(n=6);group 3,0.9%TE(n=8);and group 4,1.5%TE(n=6).Doxorubicin(2.4 mg/kg)was infused immediately after TE injection via the hepatic *** 2 h,the livers were harvested,and doxorubicin concentrations were calculated *** doxorubicin concentrations were compared between TE groups and the control group,and the optimal concentrations within the TE groups were *** analysis was performed using the nonparametric Mann-Whitney U test and Kruskal-Wallis test.P0.05).CONCLUSION TE infusion into the hepatic arteries significantly increased the doxorubicin concentration approximately twofold but was not different between the TE *** findings suggest that TE infusion might be a useful adjuvant treatment of liver cancers.

关键词： Triolein emulsion Liver tumor Chemotherapy Drug delivery Vascular permeability Dexorubicin