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High-Throughput Pb Recycling for Perovskite Solar Cells Using Biomimetic Whitlockite

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Energy & Environmental Materials 2023年第3期6卷 170-176页

作者： Jung Sug Hong Hee Jung Kim Chang Hwun Sohn Oh Yeong Gong Jin Hyuk Choi Kang Hee Cho Gill Sang Han Ki Tae nam Hyun suk Jung Department of Materials Science and Engineering Seoul National UniversitySeoul 08826Korea School of Advanced Materials Science and Engineering Sungkyunkwan UniversitySuwon 16419Korea

Pb contamination in aquatic environments causes severe pollution;therefore,harmless absorbents are *** this study,we report a novel synthesis of whitlockite(WH,Ca_(18)Mg_(2)(HPO_(4))_(2)(PO_(4))_(12)),which is the second most abundant biomineral in human bone,and its application as a high-performing Pb^(2+)***(HAP)and WH are prepared via a simple precipitation *** Pb2+absorption performance and mechanism of the synthesized biominerals are investigated in aqueous solutions at neutral *** results demonstrate that WH exhibits an excellent Pb2+absorption capacity of 2339 mg g^(−1),which is 1.68 times higher than the recorded value for ***,the absorbed Pb^(2+) ions are recycled into high-purity PbI_(2).This is employed as a precursor for the fabrication of perovskite solar cells(PSCs),resulting in a conversion efficiency of 19.00%comparable to that of commercial PbI2 powder(99.99%purity).Our approach provides an efficient way to remove Pb^(2+)ions from water and reuse them in the recycling of PSCs.

关键词： Pb absorption Pb recycling perovskite solar cells water purification whitlockite

Thick free-standing electrode based on carbon-carbon nitride microspheres with large mesopores for high-energy-density lithium-sulfur batteries

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Carbon Energy 2021年第3期3卷 410-423页

作者： Hui-Ju Kang Tae-Gyu Lee Heejin Kim Jae-woo Park Hyun Jin Hwang Hyeonseok Hwang Kwang-suk Jang Hae Jin Kim Yun suk Huh Won Bin Im Young-Si Jun Department of Advanced Chemicals&Engineering Chonnam National UniversityBuk-guGwangjuRepublic of Korea Division of Analytical Science Korea Basic Science Institute(KBSI)Yuseong-guDaejeonRepublic of Korea School of Chemical Engineering Chonnam National UniversityBuk-guGwangjuRepublic of Korea Department of Applied Chemistry Hanyang UniversityAnsanGyeonggi-doRepublic of Korea Department of Biological Engineering Inha UniversityNam-guIncheonRepublic of Korea Division of Materials Science and Engineering Hanyang UniversitySeongdong-guSeoulRepublic of Korea

The development of sulfur cathodes with high areal capacity and high energy density is crucial for the practical application of lithium-sulfur batteries(LSBs).LSBs can be built by employing(ultra)high-loading sulfur cathodes,which have rarely been realized due to massive passivation and ***,microspheres of a carbon-carbon nitride composite(C@CN)with large mesopores are fabricated via molecular cooperative *** the C@CN-based electrodes,the effects of the large mesopores and N-functional groups on the electrochemical behavior of sulfur in LSB cells are thoroughly investigated under ultrahigh sulfur-loading conditions(>15 mgS cm^(-2)).Furthermore,for high-energy-density LSBs,the C@CN powders are pelletized into a thick free-standing electrode(thickness:500^m;diameter:11 mm)via a simple briquette process;here,the total amount of energy stored by the LSB cells is 39 mWh,corresponding to a volumetric energy density of 440 Wh L-1 with an areal capacity of 24.9 and 17.5 mAh cm^(-2) at 0.47 and 4.7 mA cm^(-2),respectively(at 24mgS cm^(-2)).These results have significantly surpassed most recent records due to the synergy among the large mesopores,(poly)sulfide-philic surfaces,and thick *** developed strategy with its potential for scale-up successfully fills the gap between laboratory-scale cells and practical cells without sacrificing the high areal capacity and high energy density,providing a solid foundation for the development of practical LSBs.

关键词： briquette process carbon nitride free-standing electrode high energy density lithium-sulfur batteries mesopores

Spatial and spectral measurement of laser-driven protons through radioactivation

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Nuclear Science and Techniques 2023年第12期34卷 30-39页

作者： Yin‑Ren Shou Xue‑Zhi Wu Gwang‑Eun Ahn Seung Yeon Kim Seong Hoon Kim Hwang woon Lee Jin woo Yoon Jae Hee Sung Seong Ku Lee Xue‑Qing Yan Il woo Choi Chang Hee nam Center for Relativistic Laser Science Institute for Basic ScienceGwangju 61005Republic of Korea School of Physics Peking UniversityBeijing 100871China Advanced Photonics Research Institute Gwangju Institute of Science and TechnologyGwangju 61005Republic of Korea Department of Physics and Photon Science Gwangju Institute of Science and TechnologyGwangju 61005Republic of Korea

The simultaneous measurement of the spatial profile and spectrum of laser-accelerated protons is important for further optimization of the beam qualities and *** report a detailed study regarding the underlying physics and regular procedure of such a measurement through the radioactivation of a stack composed of aluminum,copper,and CR-39 plates as well as radiochromic films(RCFs).After being radioactivated,the copper plates are placed on imaging plates(IPs)to detect the positrons emitted by the reaction products through contact *** spectrum and energy-dependent spatial profile of the protons are then obtained from the IPs and confirmed by the measured ones from the RCFs and CR-39 *** also discuss the detection range,influence of electrons,radiation safety,and spatial resolution of this ***,insights regarding the extension of the current method to online measurements and dynamic proton imaging are also provided.

关键词： Laser-driven proton acceleration Proton-induced nuclear reaction Radioactivation measurement Contact imaging

Analysis of Herbal Medicine Prescriptions for Patients in An Academic Korean Medical Hospital:A Cross Sectional Study of Electronic Medical Records(2010–2013)

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Chinese Journal of Integrative Medicine 2018年第6期24卷 467-473页

作者： Byung-wook Lee Hyeon-Yeop Lee Kwang-Ho Heo Hyun-woo Cho Man-suk Hwang In Heo Byung-Cheul Shin Eui-Hyoung Hwang Department of Classics and Medical History College of Korean MedicineDongguk University Dongje Medical Co. Ltd. Department of Korean Medicine Yeongam Public Health Center Department of Third Green Oriental HospitalBu-cheon (14582)Republic of Korea Department of Korean Medical Science School of Korean MedicinePusan National University Department of Rehabilitation Medicine of Korean Medicine Dae-Jeon Korean Medicine HospitalDae-Jeon University Department of Rehabilitation Medicine of Korean Medicine Korean Medicine HospitalPusan National University

Objective： To obtain fundamental information for the standardization of herbal medicine in Korea. Methods： We analyzed the herbal medicine prescription data of patients at the Pusan National University Korean Medicine Hospital from March 2010 to February 2013. We used the Dongui-Bogam （Dong Yi Bao Jian） to classify prescribed herbal medicines. Results： The study revealed that the most frequently prescribed herbal medicine was ‘Liuwei Dihuang Pill （LWDHP, 六味地黄丸）＇ which was used for invigorating ‘Shen （Kidndy）-yin＇. ‘LWDHP＇ was most frequently prescribed to male patients aged 50-59, 60-69, 70-79 and 80-89 years, and ‘Xionggui Tiaoxue Decoction （XGTXD, 芎归调血饮）＇ was most frequently prescribed to female patients aged 30-39 and 40-49 years. According to the International Classification of Diseases （ICD） codes,‘Diseases of the musculoskeletal system and connective tissue＇ showed the highest prevalence. ‘LWDHP＇ and ＇XGTXD＇ was the most frequently prescribed in categories 5 and 3, respectively. Based on the percentage of prescriptions for each sex, ‘Ziyin Jianghuo Decoction （滋阴降火汤）＇ was prescribed to mainly male patients, and ‘XGTXD＇ with ‘Guima Geban Decoction （桂麻各半汤）＇ were prescribed to mainly female patients. Conclusion： This study analysis successfully determined the frequency of a variety of herbal medicines, and many restorative herbal medicines were identified and frequently administered.

关键词： herbal medicine herbal medicine prescription traditional Korean medicine Chinese medicine electronic medical record Dongui-Bogam

Recoverable SnO_2-Based Sensors Promoted with MoO_3 and Sb_2O_3 for the Detection of DMMP

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稀有金属材料与工程 2006年第A03期35卷 155-156页

作者： woo suk Lee Ho Yun Choi Soo Chool Lee Soo Jae Lee Duk Dong Lee Jeung Soo Huh Jae Chang Kim Department of Chemical Engineering Kyungpook National UniversityDaegu 702-701Korea School of Electrical Engineering and Computer Science Kyungpook National UniversityDaegu 702-701Korea Department of Materials Science and Metallurgy Kyungpook National UniversityDaegu 702-701Korea

The sensitivity and the recovery behavior of SnO_2-based gas sensor prepared from a commercial SnO_2 powder were tested under the low concentration of DMMP(0.5μg/g) in the flow system at 350℃.In order to improve the sensitivity of the sensor,promoters such as NiO,Nb_2O_5,MoO_3,and Sb_2O_3 were added into SnO_2 *** sensitivities were increased up to 80% from 50% but they were not *** the SnO2-based gas sensor promoted with MoO_3 and Sb_2O_3 was recovered after detection of DMMP,although the recovery rate was *** particular,the SnO_2-based sensor promoted with 5wt% of MoO_3 and 1wt% of Sb_2O_3 simultaneously showed an complete recovery ability,though its sensitivity was 40% which was lower than that of SnO_2 gas sensor without *** ability was discussed in terms of catalytic roles of promoters.

关键词： SnO2 MoO3 Sb2O3 sensor,recovery DMMP

Anti-inflammatory effects of natural volatile organic compounds from Pinus koraiensis and Larix kaempferi in mouse model

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The Journal of Biomedical Research 2019年第5期33卷 343-350页

作者： Changhwan Ahn Jae-woo Kim Mi-Jin Park Seung Ryul Kim Sung-suk Lee Eui-Bae Jeung Laboratory of Veterinary Biochemistry and Molecular Biology Veterinary Medical Center and College of Veterinary MedicineChungbuk National UniversityCheongjuChungbuk 28644Republic of Korea Division of wood Chemistry&Microbiology Department of Forest ProductsNational Institute of Forest ScienceSeoul 02455Republic of Korea Laboratory of Biochemistry School of MedicineChungbuk National UniversityCheongjuChungbuk 28644Republic of Korea.

Natural volatile organic compounds(VOCs) extracted from conifers such as P. koraiensis and L. kaempferi have long been studied for their anti-oxidant, anti-proliferative, and anti-inflammatory effects. To evaluate the anti-inflammatory effects of VOCs from P. koraiensis and L. kaempferi, lipopolysaccharide(LPS) was administered to generate a mouse model for inflammation by the nasal route to the lungs and intraperitoneally to the whole body. VOCs of P. koraiensis and L. kaempferi were exposed to the mice by standardized wood panels with closed system. Increased levels of serum IgE and PGE2 were observed after exposure to dexamethasone and VOCs. We further determined the expression levels of inflammatory cytokine mRNA in the LPS-induced inflammation model by the reverse transcription quantitative polymerase chain reaction. Furthermore, the levels of cyclooxygenase-2, tumor necrosis factor-α, interleukin-1β, and interleukin-13 were determined in peripheral blood mononuclear cells. Those inflammatory cytokines and the key enzyme for inflammation cyclooxygenase-2 expression in PBMCs were strongly reversed by dexamethasone and VOCs. Lung tissues after nasal LPS exposure showed increased cytokine mRNA expressions which were suppressed by treatment with dexamethasone and VOCs. Furthermore, the damage induced by LPS was attenuated by dexamethasone and VOCs. In conclusion, the results from the present study indicate that VOCs of P. koraiensis and L. kaempferi have a therapeutic potential in the treatment or prevention of local and systemic inflammation due to their immunosuppressive effects.

关键词： Pinus koraiensis Larix kaempferi inflammation cytokine lungs

High-damping and conducting epoxy nanocomposite using both zinc oxide particles and carbon nanofibers

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Journal of Materiomics 2018年第3期4卷 187-193页

作者： Jae-Soon Jang Gyo woo Lee Hyung-ick Kim Sung Yong Hong Lijie Ci Jae-Do nam Jonghwan Suhr Simulation Group Battery R&D CenterSAMSUNG SDI CO.LTDSamsung-RoYeongtong-GuSuwon-SiGyeonggi-DoSouth Korea Division of Mechanical Design Engineering Chonbuk National UniversityJeonju561-756South Korea Dongnam Regional Division Korea Institute of Industrial TechnologyJinju 52845South Korea Department of Polymer Science and Engineering Sungkyunkwan University2066SeoburoJangan-guGyeonggi-doSouth Korea School of Materials Science&Engineering Shandong UniversityChina School of Mechanical Engineering Sungkyunkwan University2066SeoburoJangan-guGyeonggi-doSouth Korea Department of Energy Science Sungkyunkwan University2066SeoburoJangan-guGyeonggi-doSouth Korea

In this study,high-damping and conducting epoxy nanocomposites were developed with carbon nanofibers as conducting materials,and zinc oxide particles as piezoelectric *** mechanical and electrical properties,electrical impedance,and loss factors were investigated by uniaxial tensile tests,voltage measurement,impedance measurement,and 3-point bending *** percolation thresholds were found:the percolation threshold of resistivity due to the carbon nanofibers forming conductive networks in the matrix;and the impedance threshold due to the zinc oxide particles acting like electric barriers.A poling treatment of the high-damping and conducting epoxy nanocomposite was considered,and we found that poling treatment helped to make the networks more conductive and to generate voltage from ZnO particles.A high-damping and conducting epoxy nanocomposite with 3 wt%CNF and 10 wt%ZnO exhibited higher loss factor than those of others tested.

关键词： Damping Piezoelectric materials Impedance Poling treatment Loss factor

Superior electrocatalytic negative electrode with tailored nitrogen functional group for vanadium redox flow battery

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Journal of Energy Chemistry 2023年第3期78卷 148-157,I0005页

作者： Min Gu Kang wook Ahn Joonhee Kang Shin Ae Song Kiyoung Kim Ju Young woo Yong-Cheol Jeong Bonwook Koo Dae Soo Jung Sung nam Lim Micro/Nano Scale Manufacturing Group Korea Institute of Industrial Technology143 HanggaulroSangrok-guAnsan-siGyeonggi-do 15588Republic of Korea Department of Energy Systems Engineering Soonchunhyang University22 Soonchunhyang-roShinchang-myeonAsan-siChungcheongnam-do 31538Republic of Korea Department of Nanoenergy Engineering Pusan National UniversityBusan 46241Republic of Korea Department of Nano Fusion Technology Pusan National UniversityBusan 46241Republic of Korea Energy Storage Materials Center Energy&Environmental DivisionKorea Institute of Ceramic Engineering&Technology(KICET)101 Soho-roJinju-siGyeongsangnam-doRepublic of Korea

Development of electrodes with high electrocatalytic activity and stability is essential for solving problems that still restrict the extensive application of vanadium redox flow batteries(VRFBs).Here,we designed a novel negative electrode with superior electrocatalytic activity by tailoring nitrogen functional groups,such as newly formed nitro and pyridinic-N transformed to pyridonic-N,from the prenitrogen-doped *** was experimentally confirmed that an electrode with pyridonic-N and nitro fuctional groups(tailored nitrogen-doped graphite felt,TNGF) has superior electrocatalytic acivity with enhanced electron and mass *** functional theory calulations demonstrated the pyridonic-N and nitro functional groups promoted the adsorption,charge transfer,and bond formation with the vanadium species,which is consistent with expermental *** addition,the V2+/V3+redox reaction mechanism on pyridonic-N and nitro functional groups was estabilised based on density functional theory(DFT) *** TNGF was applied to a VRFB,it enabled enhanced-electrolyte utilization and energy efficiencies(EE) of 57.9% and 64.6%,respectively,at a current density of 250 mA cm^(-2).These results are 18.6% and 8.9% higher than those of VRFB with electrode containing graphitic-N and pyridinicN ***,TNGF-based VRFB still operated with an EE of 59% at a high current density of300 mA cm^(-2).The TNGF-based VRFB exhibited stable cycling performance without noticeable decay of EE over 450 charge-discharge cycles at a current density of 250 mA cm^(-2).The results of this study suggest that introducing pyridonic-N and nitro groups on the electrode is effective for improving the electrochemical performance of VRFBs.

关键词： Tailored nitrogen functional group Pyridonic-N Nitro Negative electrode Density functional theory Vanadium redoxﬂow batteries

WNT5A drives interleukin-6-dependent epithelial-mesenchymal transition via the JAK/STAT pathway in keloid pathogenesis

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Burns & Trauma 2022年第1期10卷 200-215页

作者： Young In Lee Jung Eun Shim Jihee Kim Won Jai Lee Jae woo Kim Kee Hyun nam Ju Hee Lee Department of Dermatology Severance HospitalCutaneous Biology Research InstituteYonsei University College of MedicineSeoul 03722Korea Bioinformatics Collaboration Unit Yonsei University College of MedicineSeoul 03722Korea Department of Plastic and Reconstructive Surgery Severance HospitalYonsei University College of MedicineSeoul 03722Korea Scar Laser and Plastic Surgery Center Yonsei Cancer HospitalYonsei University College of MedicineSeoul 03722Korea Department of Biochemistry and Molecular Biology Chronic Intractable Disease for Systems Medicine Research CenterYonsei University College of MedicineSeoul 03722Korea Department of Surgery Severance HospitalYonsei University College of MedicineSeoulKorea

Background:Keloid scarring is a fibroproliferative disease caused by aberrant genetic activation with an unclear underlying *** predisposition,aberrant cellular responses to environmental factors,increased inflammatory cytokines and epithelial-mesenchymal transition(EMT)phenomena are known as major *** this study,we aimed to identify the molecular drivers that initiate keloid ***:Bulk tissue RNA sequencing analyses of keloid and normal tissues along with ex vivo and in vitro tests were performed to identify the contributing genes to keloid *** animal model of inflammatory keloid scarring was reproduced by replication of a skin fibrosis model with intradermal bleomycin injection in C57BL/6 ***:Gene set enrichment analysis revealed upregulation of Wnt family member 5A(WNT5A)expression and genes associated with EMT in keloid ***,human keloid tissues and the bleomycin-induced skin fibrosis animal model showed significantly increased expression ofWNT5A and EMT *** activation of the interleukin(IL)-6/Janus kinase(JAK)/signal transducer and activator of transcription(STAT)pathway and subsequent elevation of EMT markerswas also observed in keratinocytes co-cultured withWNT5A-activated fibroblasts or keloid ***,WNT5A silencing and the blockage of IL-6 secretion via neutralizing IL-6 antibody reversed hyperactivation of the STAT pathway and EMT markers in ***,STAT3 silencing significantly reduced the EMT-like phenotypes in both keratinocytes and IL-6-stimulated ***:Intercellular communication via the WNT5A and STAT pathways possibly underlies a partial mechanism of EMT-like phenomena in keloid ***-6 secreted from WNT5A-activated fibroblasts or keloid fibroblasts activates the JAK/STAT signaling pathway in adjacent keratinocytes which in turn express EMT markers.A better understanding of keloid development and the

关键词： Keloid Wnt family member 5A Interleukin-6 JAK/STAT pathway Epithelial-mesenchymal transition Scar Epithelial mesenchymal transition