检索结果-南通市图书馆

Catalytic Conversion of Methanol by Oxidative Dehydrogenation

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Journal of Natural Gas Chemistry 2007年第1期16卷 1-5页

作者： toshihito ohtak. Tohru Mori Yutaka Morikawa Department of Electronic Chemistry Interdisciplinary Graduate School of Science and EngineeringTokyo Institute of Technology4259 NagatsutaMidori-kuYokohama 226-8502 Japan

This study investigates the effects of addition of oxygen on the oxidative dehydrogenation （ODH） of methanol when a fluorotetrasilicic mica ion-exchanged with palladium （Pd2^＋-TSM） was used as the catalyst. The reaction proceeded at a very low temperature in the presence of oxygen, and HCOOCH3 was obtained at high selectivity. By calculating the equilibrium conversion, it has been shown that substantial ODH took place for HCOOCH3 production. Consequently, this reaction would make dehydrogenation the dominant reaction at equilibrium. Not all the H dissociated from CH3OH was converted to H20 by oxidation. It has been shown that the H2O was not produced from oxidative dehydrogenation by the direct reaction of CH3OH and O2 when an attempt was made to carry out oxidative dehydrogenation using an isotope oxygen trace method in the gas phase. Therefore, when CHaOH was converted to CO2 and dehydrogenated to HCOOCH3, the C-O bonds were not dissociated.

关键词： C1 chemistry conversion methanol oxidative dehydrogenation catalysis

In SituATR-FTIR Observation about Surfactant/Hydrogen-TerminatedSi(111) Interface in Solution

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Journal of Surface Engineered Materials and Advanced Technology 2014年第2期4卷 47-52页

作者： toshihito ohtak. Department of Mechanical Systems Engineering Faculty of Engineering Aichi University of Technology Aichi Japan

Development of novel functional devices has been expected by modification for Si surface. This study investigated immobilization and roles of the Si surface with flowing surfactant by in situ ATR-FTIR method. This result suggested that the surfactant prevented oxidation of the hydrogen-terminated Si surface from the higher concentration in aqueous solution. These would guard the Si surface against H2O molecules.

关键词： ATR-FTIR Si Hydrogen Termination Surfactant

Single Phase Li4Ti5O12Synthesis for Nanoparticles by Two Steps Sintering

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Materials Science and Chemical Engineering 2015年第2期3卷 5-10页

作者： toshihito ohtak. Department of Mechanical Systems Engineering Faculty of Engineering Aich University of Technology Gamagori Japan

Li4Ti5O12 has been noticed about a negative electrode of a high powered and safe lithium ion secondary battery. These properties require single phase, high crystallization, larger specific surface area and fine nanoparticles. This study carried out the noble synthesis of Li4Ti5O12 using a solid phase synthesis by two steps sintering. These results showed Li4Ti5O12 of 6.1 m2·g-1?and diameter of 110 nm with the single phase and high crystallization. Li2TiO3 will play an important role in this reaction, obtained by pre-sintering as a precursor.

关键词： Lithium Ion Secondary Battery Li4Ti5O12 Solid Phase Synthesis Sintering Nanoparticle

Methyl Termination and ATR-FTIR Evaluation of n-Si(111) Electrode towards Photoelectrochemical Cell Fabrication

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Surface Engineered Materials and Advanced Technology 2013年第3期3卷 169-171页

作者： toshihito ohtak. Department of Mechanical Systems Engineering Faculty of Engineering Aichi University of Technology Gamagori Japan.

We confirmed methyl termination on n-Si(111) surface by ATR-FTIR measurement, which was fabricated by a photo chloro-reaction and its methylation. The coverage of the methylation was about 63.7%, and the surface was not re-terminated by hydrogen. Photoelectrochemical properties of the n-Si(111) were measured as an electrode for a photoelectrochemical cell, and an onset potential obtaining photocurrent for the methyl terminated n-Si(111) electrode was observed as negative shift at 70 mV comparing with that of the hydrogen terminated n-Si(111) electrode. Therefore, the negative shift would be expected for improving open circuit voltage towards solar cell.

关键词： Methyl Termination ATR-FTIR Semiconductor Electrode Si Photoelectrochemical Cell

ATR-FTIR and XPS Evaluation of Alkyl Immobilization by Hydrosilylation on n-Si(111) for Photoelectrochemical Cell Electrode

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Surface Engineered Materials and Advanced Technology 2013年第3期3卷 7-10页

作者： toshihito ohtak. Department of Mechanical Systems Engineering Faculty of Engineering Aich University of Technology Gamagori Japan.

An electrode development was needed with high efficiency and low costs as next generation solar cells. We attempted the electrode fabrication for a photoelectrochemical cell by immobilizing functional groups on a n-Si(111) surface. The immobilization was applied by hydrosilylation terminated with ester (hydrophobic) or carbonyl (hydrophilic) group. Results confirmed the immobilization on the Si surface by measuring ATR-FTIR and XPS.

关键词： ATR-FTIR XPS Si Surface Hydrosilylation Immobilization Photoelectrochemical Cell

Fabrication by Fine Particles and Evaluation of WO3Photo Semiconductor Electrode

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Materials Science and Chemical Engineering 2013年第6期1卷 51-54页

作者： toshihito ohtak. Department of Mechanical Systems Engineering Faculty of Engineering Aich University of Technology Gamagori Japan

Application of semiconductor particles has been noticed to solve energy problems as photocatalysis for O2 evolution in water splitting etc. We are trying fabrication of semiconductor electrode by n-WO3 particle toward O2 evolution in water splitting. The electrode obtained high photooxidation properties of water as preventing effective recombination between electrons and holes by utilizing fine semiconductor particles. Particularly, application of suspension prepared by ball milling was able to obtain fine n-WO3 thin film and the remarked semiconductor properties.

关键词： Semiconductor Electrode WO3 Photocatalysis Photoelectrochemistry Water Splitting

Li4Ti5O12Synthesis with High Specific Surface Area and Single Phase

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Materials Science and Chemical Engineering 2015年第9期3卷 68-73页

作者： toshihito ohtak. Ken-ichiro Iijima Department of Mechanical Systems Engineering Faculty of Engineering Aich University of Technology Gamagori Japan

We have investigated a novel Li4Ti5O12 synthesis with high specific surface area, high crystallization and single phase and its mechanism. The method was performed with a solid phase synthesis by using CH3COOLi·2H2O and anatase TiO2 via Li2TiO3 as an intermediate in pre-sintering at 500°C and sintering at 750°C. This result showed specific surface area of 12 m2/g and single phase- Li4Ti5O12 by applying the high specific surface anatase TiO2 as a precursor.

关键词： Li4Ti5O12 Solid Phase Synthesis Specific Surface Area SEM TEM

In SituImposing Bias ATR-FTIR Observation at Hydrogen Terminated Si(111) Electrode Surface-Modified with Adsorbed Monolayer

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Surface Engineered Materials and Advanced Technology 2019年第3期9卷 29-37页

作者： toshihito ohtak. Ken-ichiro Iijima Department of Environmental Science Faculty of Life and Environmental Sciences Prefectural University of Hiroshima Hiroshima Japan Department of Mechanical Systems Engineering Faculty of Engineering Aichi University of Technology Aichi Japan

Since hydrogen-terminated Si surface has hydrophobicity, it is expected that adsorbed monomolecular film of surfactant will be formed on the Si surface in aqueous solution containing the surfactant. Such an adsorbed monolayer film is very effective for the development of a functional electrode. In this study, we have investigated the state of adsorption about an aerosol OT as the monolayer on the electrode surface and its orientation with hydrogen-terminated Si(111) surface by in situ ATR-FTIR spectroscopy. At this time, in situ observation performed while imposing bias to the electrode. The results suggested that the aerosol OT were desorbed by the oxidation of back-bonds in the Si atoms on the electrode surface under the imposing noble potential, although no change was observed especially when imposing less-noble potential.

关键词： Semiconductor Electrode Silicon Hydrogen Termination Oxidization In Situ ATR-FTIR

Surface Oxide Protection of Si(111) in Solution by the Surfactant Molecules

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Surface Engineered Materials and Advanced Technology 2017年第4期7卷 61-68页

It has been attempted to immobilize organic mono layer on semiconductor surface as functional materials. Silicon surface was especially noticed to develop highly efficient and functional devices, and the silicon devices were expected for the immobilized surface with organic layer. Then we have attempted the immobilization by the mono layer on the hydrogen terminated silicon surface with the alkyl base indicated hydrophobic by using a surfactant. We have observed interactions of immobilized molecules and organic molecules adsorbed on hydrogen terminated Si(111), which is aerosol OT as known surfactant and 4-cyanophenol as shown amphipathic molecule. The aerosol OT inhibited oxidation of Si(111) surface by adsorption to the hydrogen terminated surface to indicate hydrophobic. The 4-cyanophenol made the surface oxide by adsorption, and was desorbed by forming hydrophilic Si surface. In the case of the mixed solution by the aerosol OT and 4-cyanophenol, the aerosol OT controlled the surface oxidation on the hydrogen terminated Si against the 4-cyanophenol.

关键词： Adsorption Silicon Hydrogen Termination Amphipathic In-Situ ATR-FTIR