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Application of nanocatalyst iron oxide (Fe2O3) to reduce exhaust emissions (CO and HC)

IOP Conference Series: Materials science and Engineering 2018年第1期432卷

作者： P Puspitasari C Yazirin L A Bachtiar J W Dika SM S N S Zaharis Mechanical Engineering Department Engineering Faculty Malang State University Semarang street 5 Malang East Java Indonesia Center of Nano Research and Advanced Materials Malang State University Semarang street 5 Malang East Java Indonesia Master Program of Mechanical Engineering Engineering Faculty Malang State University Semarang street 5 Malang East Java Indonesia Bachelor Program Mechanical Engineering Department Malang State University Semarang street 5 Malang East Java Indonesia Industrial Chemical Technology Programme Faculty of Science and Technology Universiti Sains Islam Malaysia Bandar Baru Nilai 71800 Nilai Negeri Sembilan

Fe2O3 has been the interest of many studies due to its applications in various scientific and industrial fields including in environment, corrosion, soil science, and exhaust emissions. Fe2O3 is a chemical mixture that can be applied as a catalyst to reduce exhaust emissions because it is capable of binding CO and HC contained in motorcycle exhaust gases The growth of motor vehicles results in air pollution and an increase in exhaust emissions consisting of 70.50% CO and 18.34% HC. One effort to reduce exhaust emission levels is by applying a catalytic converter to the exhaust system. This research was an experimental research aiming to investigate the difference in emission level of CO and HC between a motorcycle with and without a catalytic converter. The types of fuel used were RON 88, RON 90, RON 92, and RON 98. The results showed that the application of Fe2O3 as a catalyst could reduce the level of CO significantly in RON 88, i.e. 91.43% CO, and the level of HC in RON 88 and RON 92, i.e. 53.27% and 91.07% HC respectively.

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In-situ fabrication of dual porous titanium dioxide films as anode for carbon cathode based perovskite solar cell

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Journal of Energy Chemistry 2015年第6期24卷 736-743页

作者： Xiaoli Zheng Zhanhua Wei Haining Chen Yang Bai Shuang Xiao Teng Zhang Shihe Yang Department of Chemistry The Hong Kong University of Science and Technology Nano Science and Technology Program The Hong Kong University of Science and Technology

We develop a dual porous （DP） TiO2 film for the electron transporting layer （ETL） in carbon cathode based perovskite solar cells （C-PSCs）. The DP TiO2 film was synthesized via a facile PS-templated method with the thickness being controlled by the spin-coating speed. It was found that there is an optimum DP TiO2 film thickness for achieving an effective ETL, a suitable perovskite]TiO2 interface, an efficient light harvester and thus a high performance C-PSC. In particular, such a DP TiO2 film can act as a scaffold for complete-filling of the pores with perovskite and for forming high-quality perovskite crystals that are seamlessly interfaced with Ti02 to enhance interracial charge injection. Leveraging the unique advantages of DP TiO2 ETL, together with a dense-packed and pinhole-free TiO2 compact layer, PCE of the C-PSCs has reached 9.81% with good stability.

关键词： Dual porous TiO2 film Carbon cathode Perovskite solar cell Light scattering Charge transport

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Antibody‐Based Therapeutics: Ultrasensitive NIR‐SERRS Probes with Multiplexed Ratiometric Quantification for In Vivo Antibody Leads Validation (Adv. Healthcare Mater. 4/2018)

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Advanced Healthcare Materials 2018年第4期7卷

作者： Homan Kang Sinyoung Jeong Ahla Jo Hyejin Chang Jin‐Kyoung Yang Cheolhwan Jeong San Kyeong Youn Woo Lee Animesh Samanta Kaustabh Kumar Maiti Myeong Geun Cha Taek‐Keun Kim Sukmook Lee Bong‐Hyun Jun Young‐Tae Chang Junho Chung Ho‐Young Lee Dae Hong Jeong Yoon‐Sik Lee Interdisciplinary Program in Nano‐Science and Technology Seoul National University Seoul 08826 Republic of Korea Department of Chemistry Education Seoul National University Seoul 08826 Republic of Korea Department of Nuclear Medicine Seoul National University Bundang Hospital Seongnam 13620 Republic of Korea School of Chemical and Biological Engineering Seoul National University Seoul 08826 Republic of Korea Department of Chemistry and MedChem Program of Life Sciences Institute National University of Singapore Singapore 117543 Singapore Laboratory of Molecular Cancer Therapeutics Scripps Korea Antibody Institute Hyoja‐2‐dong Chuncheon‐si Gangwon‐do 24341 Republic of Korea Department of Bioscience and Biotechnology Konkuk University Seoul 05029 Republic of Korea Department of Chemistry Pohang University of Science and Technology (POSTECH) Pohang 37673 Republic of Korea Cancer Research Institute Seoul National University College of Medicine Seoul 03080 Republic of Korea

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Ab initio study of the PbTaSe2-related superconducting topological metals

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Physical Review B 2016年第16期94卷 165148-165148页

作者： Peng-Jen Chen Tay-Rong Chang Horng-Tay Jeng Department of Physics National Taiwan University Taipei 10617 Taiwan Nano Science and Technology Program Taiwan International Graduate Program Academia Sinica Taipei 11529 Taiwan and National Taiwan University Taipei 10617 Taiwan Institute of Physics Academia Sinica Taipei 11529 Taiwan Department of Physics National Tsing Hua University Hsinchu 30013 Taiwan

Recent reports have demonstrated the Z2 topological property of the superconductor PbTaSe2 (Tc∼3.8 K). PbTaSe2 simultaneously exhibits superconductivity and nontrivial Z2 topology without the need for doping or proximity effect. Scanning tunneling microscopy confirms that the topological surface states are gapped by superconductivity, indicating the likelihood of the chiral px+ipy pairing mechanism. Motivated by these exciting findings, we predict by means of the first-principles scheme that ABSe2 (A=Pb or Sn and B=Ta or Nb) is also a superconductor with nontrivial Z2 topology. Among these, SnNbSe2 shows the highest Tc∼7.0 K. Due to the fact that the required energy resolution to detect the Majorana bound states is of the order of Δ2/ɛF, the predicted higher Tc of ABSe2 may help mitigate some experimental challenges and provides a better platform for the exploration of the topological superconductivity.

关键词： First-principles calculations Superconductors Topological materials Density functional calculations

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Nickel nanocluster Loaded Black Titania for Photocatalytic Reduction of CO2 into Solar Fuels: Computational and Experimental Studies

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ECS Meeting Abstracts 2017年第52期MA2017-02卷

作者： Tadesse Billo Reta Fang-Yu Fu Putikam Raghunath Indrajit Shown Wei-Fu Chen Tzu-Hsien Shen M.C. Lin Chih-Hao Lee Jih-Shang Hwang Li-Chyong Chen Kuei-Hsien Chen Inst.of Atomic and Molecular Sci Academia Sinica Nano Science and Technology Program Academia Sinica Institute of Optoelectronic Science NTOU Center for Condensed Matter Sciences NTU Center for Interdisciplinary Molecular Science NCTU Inst. of Atomic and Molecular Sci. Academia Sinica National Taiwan University Inst. of Atomic and Molecular Sciences Academia Sinica Dept of Engineering and System Science NTHU CCMS National Taiwan University

The conversion of atmospheric carbon dioxide (CO2) into solar fuels by imitation of a natural photosynthesis using only water vapor and sunlight for energy has attracted widespread attention recently. One of the key challenges is to design a photocatalyst that can bind and activate the CO2 molecule with smallest possible activation energy and produce selective solar fuel production. In this contribution, we report a combined experimental and computational studies on Ni nanocluster loaded black TiO2 (Ni@TiO2[Vo]) with built-in dual active sites for selective photocatalytic CO2 conversion. Our findings reveal that, the synergistic effect of deliberately induced unsaturated Ni nanocluster and oxygen vacancies provide (1) energetically stable CO2 binding sites with lowest activation energy (0.08eV), (2) highly reactive sites, (3) fast electron transfer pathway, (4) enhanced light harvesting by lowering the band gap. The Ni@TiO2[Vo] photocatalyst has demonstrated highly selective and enhanced photocatalytic activity of more than 18 times higher solar fuel production than the commercial TiO2 (P-25). An insight to the mechanism of interfacial charge transfer and product formation mechanism are explored. The proposed approach to adsorb and activate CO2 molecule on dual active sites can be applied to design other catalysts for photocatalytic CO2 reduction.

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Field-induced diffraction in polymer-stabilized in-plane switching liquid crystals with vertical alignment

Field-induced diffraction in polymer-stabilized in-plane swi...

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2015 SID International Symposium

作者： Weng, Libo Lee, Seung Hee Chien, Liang-Chy Chemical Physics Interdisciplinary Program Liquid Crystal Institute Kent State University KentOH United States Department of BIN Fusion Technology Department of Polymer Nano-Science and Technology Chonbuk National University Jeonju Jeonbuk Korea Republic of

A liquid crystal device which shows the capacity to perform as an electrical switchable diffraction grating is demonstrated. Periodical modulation in field-induced refractive index was realized in the in-plane switching liquid crystal device with vertical alignment, which resulted in distinct voltage-dependent diffraction patterns. © 2015 SID.

关键词： Diffraction

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Ion Specificity on Electric Energy Generated by Flowing Water Droplets

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Angewandte Chemie 2017年第8期130卷

作者： Junwoo Park Suhwan Song ChaeHo Shin YoungJun Yang Stefan A. L. Weber Eunji Sim Youn Sang Kim Program in Nano Science and Technology Graduate School of Convergence Science and Technology Seoul National University Seoul 08826 Republic of Korea Department of Chemistry Yonsei University 50 Yonsei-ro Seodaemun-gu Seoul 03722 Korea Division of Industrial Metrology Korea Research Institute of Standards and Science Daejeon 34113 Republic of Korea Max Planck Institute for Polymer Research Ackermannweg 10 55128 Mainz Germany Institute of Physics Johannes Gutenberg University Mainz Duesbergweg 10–14 55128 Mainz Germany Advanced Institutes of Convergence Technology 864-1 Iui-dong Yeongtong-gu Suwon-si Gyeonggi-do 16229 Republic of Korea

The development of energy‐conversion devices using water movement has actively progressed. Ionovoltaic devices, which are driven by ion dynamics, show ion specificity by which different ions with identical charges show different output performance. However, the ion specificity remains poorly understood because the influence of the ion species on generated electric signals is not elucidated. The ion specificity in electric signals induced by flowing water droplet was investigated in terms of its relationship with the potential profile across the solid–liquid interface.

关键词： Energieumwandlung Fest-flüssig-Grenzflächen Ionenspezifität Ionovoltaische Funktionseinheiten

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Site-Specifically modified recombinant human granulocyte colony-stimulating factor with polyethylene glycol

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Biotechnology 2015年第4期14卷 200-205页

作者： Park, See-Hyoung Program in Nano Science and Technology Department of Transdisciplinary Studies Graduate School of Convergence Science and Technology Seoul National University Suwon443-270 Korea Republic of

To prepare PEGylated recombinant human granulocyte colony-stimulating factor (rHuG-CSF) with enhanced pharmacokinetic properties we prepared a cysteine-substituted mutant of rHuG-CSF (mrHuG-CSF). For site-specific PEGylation of mrHuG-CSF Threonine 134 residue that is one of the glycosylation sites and thought not to be critical in structure and function of rHuG-CSF was substituted by Cysteine. Also, Cysteine 17 residue at N-terminus that does not make di-sulfide bonds and is partially buried was substituted by Serine. This mrHuG-CSF was then site-specifically conjugated with 5 or 20 kDa of polyethylene glycol-maleimide and the correct molecular weight of the conjugates was confirmed by MALDI-TOF mass spectrometry analysis. Compared with unmodified rHuG-CSF, both PEGylated mrHuG-CSF showed similar biological activities in vitro and the plasma half-life of the 20 kDa PEGylated mrHuG-CSF was about 5-folds increased. Taken together, site-specific PEGylation of mrHuG-CSF may increase their therapeutic potency in humans. © 2015 Asian Network for Scientific Information.

关键词： Pharmacokinetics

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Large-Scale purification of human apolipoprotein kringle domain V (rhualkv) expressed in pichia pastoris

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Biotechnology 2015年第4期14卷 206-210页

Human apolipoprotein kringle domain V (rHualkV) that has an anti-angiogenic activity was expressed and purified in large scale from Pichia pastoris. rHualkV was captured by SP-Streamline resin directly from 40 L culture broth through batch type adsorption with about 80% yield (n = 8). Captured rHualkV was further purified by SP-Sepharose column chromatography and concentrated by membrane filtration. On average 5 g of rHualkV was purified per batch with the 56% final yield. The result of analytical High-Performance Liquid Chromatography (HPLC) of the purified rHualkV showed the single peak. ESI mass-spectrometry analysis of the rHualkV has proved that the purified rHualkV has the 9676 kDa that is the correct molecular weight as the one calculated by amino acid sequence. In addition, rHualkV has the same N and C-terminal residue as the expected one from DNA sequence of rHualkV gene in Pichia pastoris. Thus, through three steps of process, the anti-angiogenic rHualkV was successfully expressed and purified from Pichia pastoris, which will be able to provide a basis for much larger expression and purification for production needed for clinical evaluation later. © 2015 Asian Network for Scientific Information.

关键词： Purification

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Hierarchical Assemblies: One‐Step Hierarchical Assembly of Spheres‐in‐Lamellae nanostructures from Solvent‐Annealed Thin Films of Binary Diblock Copolymer Micelles (Adv. Funct. Mater. 17/2017)

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Advanced Functional Materials 2017年第17期27卷

作者： Se Hee Kim Kookheon Char Seong Il Yoo Byeong‐Hyeok Sohn Interdisciplinary Program in Nano Science and Technology Seoul National University Seoul 151‐747 Korea School of Chemical and Biological Engineering The National Creative Research Initiative Center for Intelligent Hybrids Seoul National University Seoul 151‐747 Korea Department of Polymer Engineering Pukyong National University Busan 608‐739 Korea Department of Chemistry Seoul National University Seoul 151‐747 Korea

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