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Fabrication of morphology-controlled TiO_2 photocatalyst nanoparticles and improvement of photocatalytic activities by modification of Fe compounds

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Rare Metals 2015年第5期34卷 291-300页

作者： Teruhisa ohno Szu Ying Lee Yin Yang Department of Materials Science Graduate School of Engineering Kyushu Institute of Technology

Our previous studies suggested that redox reaction proceeded separately on specific exposed crystal faces of TiO2 nanoparticles. Site-selective deposition of metal or metal oxide on TiO2 specific exposed crystal faces successfully proceeded using the unique reactivity properties on the surface of TiO2 nanoparticles under photoexcitation. A remarkable improvement ofphotocatalytic activity of shape- controlled brookite and rutile TiO2 nanorods with modification of Fe^3＋ compounds was observed under visible light. Crystal face-selective metal compound modification on exposed crystal faces of TiO2 nanorods with brookite and futile phases was successfully prepared. Brookite and rutile TiO2 nanorods prepared by site-selective modification with metal compounds should be ideal visible-light responsive TiO2 photocatalysts because of the remarkable suppression of back electron transfer from TiO2 to oxidized metal com- pounds on the surface of the TiO2 nanorod with a brookite or rutile phase. In this paper, the development of exposed crystal face-controlled TiO2 nanorods with rutile and brookite phases was described. The obtained rutile and brookite TiO2 nanorod, showing remarkably high activity for degra- dation of organic compounds compared with the photocatalytic activities of anatase fine particles （ST-01）, is one of the most active commercially available photocatalysts for environmental cleanup in Japan. The technology of visiblelight responsive treatment for morphology-controlled rutile and brookite TiO2 nanorods by crystal face-selective modification of Fe^3＋ compounds was also discussed in this paper. The Fe^3＋ compound-modified rutile and brookite TiO2 nanorods show much higher activity than conventional visible-light responsive N-doped TiO2, which is commercially available in Japan.

关键词： Morphology-controlled TiO2 Separation of reaction sites Visible-light responsive TiO2 loaded with Fe^3+

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IMMERSIVE VR VISUALIZATIONS BY VFIVE PART 1: DEVELOPMENT

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International Journal of Modeling, Simulation, and Scientific Computing 2013年第S1期4卷 40-53页

作者： AKIRA KAGEYAMA NOBUAKI ohno Graduate School of System Informatics Kobe University Kobe657-8501Japan Graduate School of Simulation Studies University of Hyogo Kobe650-0047Japan

We have been developing a visualization application for CAVE-type virtual reality(VR)systems for more than a *** application,VFIVE,is currently used in several CAVE systems in Japan for routine *** is also used as a b... 详细信息

关键词： Virtual reality CAVE immersive display system.

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Effect of FeO concentration in sinter iron ore on reduction behavior in a hydrogen-enriched blast furnace

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International Journal of Minerals,Metallurgy and Materials 2022年第10期29卷 1820-1829页

作者： Ko-ichiro ohno Takayuki Maeda Kazuya Kunitomo Masashi Hara Department of Materials Faculty of EngineeringKyushu University744 MotookaNishi-kuFukuoka 819-0395Japan Kashima Area East Nippon WorksNippon Steel Corporation3 HikariKashima CityIbaraki 314-0014Japan

Japan started the national project“COURSE 50”for CO_(2) reduction in the *** project aimed to establish novel technologies to reduce CO_(2) emissions with partially utilization of hydrogen in blast furnace-based ironmaking by 30%by around 2030 and use it for practical applications by *** idea is that instead of coke,hydrogen is used as the reducing agent,leading to lower fossil fuel consumption in the *** has been reported that the reduction behavior of hematite,magnetite,calcium ferrite,and slag in the sinter is different,and it is also considerably influenced by the sinter *** study aimed to investigate the reduction behavior of sinters in hydrogen enriched blast furnace with different mineral morphologies in CO-CO_(2)-H2 mixed *** an experimental sample,two sinter samples with significantly different hematite and magnetite ratios were prepared to compare their reduction *** reduction of wustite to iron was carried out at 1000,900,and 800℃ in a CO-CO_(2)-H2 atmosphere for the mineral morphology-controlled sinter,and the following findings were *** reduction rate of smaller amount of FeO led to faster increase of the reduction rate curve at the initial stage of ***-observations of reduced samples showed that the reaction proceeded from the outer periphery of the sample toward the inside,and a reaction interface was observed where reduced iron and wustite ***-observations revealed three layers,namely,wustite single phase in the center zone of the sample,iron single phase in the outer periphery zone of the sample,and iron oxide-derived wustite FeO and iron,or calcium ferritederived wustite'FeO'and iron in the reaction interface zone.A two-interface unreacted core model was successfully applied for the kinetic analysis of the reduction reaction,and obtained temperature dependent expressions of the chemical reaction coefficients from each mineral phases.

关键词： hydrogen reduction wustite hematite magnetite calcium ferrite two-interface unreacted core model COURSE50

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Modeling of the impurity-induced silicon nanocone growth by low energy helium plasma irradiation

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Plasma Science and Technology 2021年第4期23卷 70-75页

作者： Quan SHI Shin KAJITA Shuyu DAI Shuangyuan FENG Noriyasu ohno Graduate School of Engineering Nagoya UniversityNagoya 464-8603Japan Institute of Materials and Systems for Sustainability Nagoya UniversityNagoya 464-8603Japan Key Laboratory of Materials Modification by Laser Ion and Electron Beams Ministry of EducationSchool of PhysicsDalian University of TechnologyDalian 116024People’s Republic of China

The formation mechanism of nanocone structure on silicon(Si)surface irradiated by helium plasma has been investigated by experiments and ***(molybdenum)aggregated as shields on Si was found to be a key factor to form a high density of nanocone in our previous *** to concrete this theory,a simulation work has been developed with SURO code based on the impurity concentration measurement of the nanocones by using electron dispersive x-ray *** formation process of the nanocone from a flat surface was *** modeling structure under an inclining ion incident direction was in good agreement with the experimental ***,the redeposition effect was proposed as another important process of nanocone formation based on results from the comparison of the cone diameter and sputtering yield between cases with and without the redeposition effect.

关键词： black silicon helium plasma nanocone simulation

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Catalytic liquid-phase oxidation of acetaldehyde to acetic acid over a Pt/CeO_2–ZrO_2–SnO_2/γ-alumina catalyst

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Journal of Environmental Sciences 2015年第10期27卷 63-66页

作者： Pil-Gyu Choi Takanobu ohno Toshiyuki Masui Nobuhito Imanaka Department of Applied Chemistry Faculty of EngineeringOsaka University

Pt/CeO2–ZrO2–SnO2/γ-Al2O3 catalysts were prepared by co-precipitation and wet impregnation methods for catalytic oxidation of acetaldehyde to acetic acid in water. In the present catalysts, Pt and CeO2–ZrO2–SnO2 were successfully dispersed on the γ-Al2O3 *** of platinum content and reaction time on the selective oxidation of acetaldehyde to acetic acid were investigated to optimize the reaction conditions for obtaining both high acetaldehyde conversion and highest selectivity to acetic acid. Among the catalysts, a Pt（6.4 wt.%）/Ce0.68Zr0.17Sn0.15O2.0（16 wt.%）/γ-Al2O3 catalyst showed the highest acetaldehyde oxidation activity. On this catalyst, acetaldehyde was completely oxidized after the reaction at 0°C for 8 hr, and the selectivity to acetic acid reached to 95%and higher after the reaction for 4 hr and longer.

关键词： Liquid-phase oxidation Acetaldehyde Rare earths Catalyst

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Carrier Dynamics and Surface Reaction Boosted by Polymer-based Single-atom Photocatalysts

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Chemical Research in Chinese Universities 2022年第5期38卷 1207-1218页

作者： TENG Zhenyuan YANG Hongbin ZHANG Qitao ohno Teruhisa Department of Applied Chemistry Faculty of EngineeringKyushu Institute of TechnologyKitakyushu 804-8550Japan School of Materials Science and Engineering Suzhou University of Science and TechnologySuzhou 215009P.R.China International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education Institute of Microscale OptoelectronicsShenzhen UniversityShenzhen 518060P.R.China

Carrier dynamics and surface reaction are two critical processes for determining the performance of photocatalytic *** designable polymer-based photocatalysts have shown promising protectives in energetic and environmental *** this prospective,we first distinguished the differences of physiochemical properties between polymer-based semiconductors and traditional inorganic ***,the effects of single-atom sites on the charge dynamics and reaction kinetics of polymer-based photocatalysts are further ***(excitation)-space(wavefunction)population analysis,which can provide relevant information to clarify the structure-excitation relationships after introducing the single atom sites was also *** the future,with the further development of artificial intelligence,the establishment of an energy function with a regression accuracy close to or reaching the level of density functional theory is highly desired to infer the energetic diagram of the photocatalytic systems at the excited ***,coordination structures,interaction with inorganic semiconductors,photocatalytic stability and solvent effects should also be carefully considered in the future studies of polymer-based photocatalyst.

关键词： Carrier dynamics Surface reaction Polymer Single-atom catalyst Dielectric property

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Refractory Metal Nitride Schottky Contact on GaN

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半导体技术 2008年第S1期33卷 75-79页

作者： ohno Yasuo Institute of Technology and Science the University of Tokushima

For thermally stable or high-temperature operating,Schottky contact utilizing refractory metal nitride,TiN,MoN and ZrN,on n-GaN were *** refractory metal nitride films were formed by reactive sputtering in Ar and N2 ***-voltage characteristics show that ideality factors of 1.09-1.22 and barrier heights of 0.66-0.75 eV was obtained for the three metal *** the ZrN contact,the ideality factor and barrier height of became 1.06 and 0.77 eV,respectively,after 800 ℃ ***/GaN heterostructure FET with TiN gate was also *** obvious degradation was found for the TiN-gate device even after thermal treatment at 850 ℃.This shows that Schottky contact utilizing refractory metal nitride on GaN has the potential for thermal stability or high-temperature operating.

关键词： refractory metal nitride GaN Schottky contact Schottky diode

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Repositioning again of zonisamide for nerve regeneration

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Neural Regeneration Research 2016年第4期11卷 541-542页

作者： Kinji ohno Hideki Yagi Bisei Ohkawara Division of Neurogenetics Center for Neurological Diseases and CancerNagoya University Graduate School of Medicine Department of Orthopedic Surgery Nagoya University Graduate School of Medicine

Drug repositioning is a strategy to identify a new application of a pre-approved drug,of which optimal dosage,administration routes,adverse effects,and contraindications are well *** repositioning enables fast and cost-effective application of an identified drug in clinical settings,and is especially suitable for orphan diseases,in which the number of patients is limited（Bernard,2014）.

关键词： Repositioning again zonisamide regeneration

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Future Applications of GaN Electron Devices

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半导体技术 2008年第S1期33卷 72-74,79页

作者： ohno Yasuo Institute of Technology and Science the University of Tokushima

0 Introduction Fifteen years have passed since the first AlGaN/GaN HFET was reported in *** FETs have already commercialized as microwave power devices,but volume production has not yet *** main application field is mobile phone base *** such applications,GaAs power transistors and silicon LDMOS have already been ***,advantages compared with these existing devices will be required,such as high efficiency,low distortion,low noise,high reliability and,especially,low ***,the latter two items are normally difficult for devices using new materials.

关键词： GaN In Future Applications of GaN Electron Devices

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Fabrication of Al-Coated Mg-Li Alloy Sheet and Investigation of Its Properties

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Acta Metallurgica Sinica(English Letters) 2019年第2期32卷 169-177页

作者： Tian-Long Zhang Toko Tokunaga Munekazu ohno Mi-Lin Zhang Kiyotaka Matsuura Graduate School of Engineering Hokkaido University Faculty of Engineering Hokkaido University College of Materials Science and Chemical Engineering Harbin Engineering University

An Al-coated Mg-8 mass% Li alloy rectangular bar was fabricated by hot extrusion, and then, it was hot-rolled into a thin sheet. The Al coating was uniform in thickness and had good bonding with the substrate during all the processing. This Alcoated Mg–Li alloy exhibited a good corrosion resistance in a 0.5 mass% HCl aqueous solution. No intermetallic compound was observed at the Al/Mg–Li interface after the extrusion and the rolling. The Al-coated Mg–Li alloy sheet exhibited an elongation to fracture of 35% at room temperature at a strain rate of 0.001 s(-1)without any debonding between the coating and the substrate. When tensile tested at 573 K at 0.001 s(-1)in the air, the Al coating remained undamaged even until an elongation of about 150%. Further elongation generated cracks on the coating and the specimen fractured at an elongation of about 200%. In an Ar atmosphere, the specimen exhibited a fracture elongation of over 400% under the same conditions at 573 K at 0.001 s(-1), although a large number of cracks generated on the Al coating.

关键词： Mg–Li alloy Composite material Coating Mechanical properties Superplasticity

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