A5019644945- Glass properties and applications
- Luminescence Properties of Advanced Materials
- Photorefractive and Nonlinear Optics
- Catalytic Processes in Materials Science
- Catalysis and Oxidation Reactions
- Zeolite Catalysis and Synthesis
- Physics of Superconductivity and Magnetism
- Laser Material Processing Techniques
- Mesoporous Materials and Catalysis
- Phase-change materials and chalcogenides
- Advancements in Battery Materials
- Metallic Glasses and Amorphous Alloys
- Solid State Laser Technologies
- Advanced Battery Materials and Technologies
- Catalysis and Hydrodesulfurization Studies
- Ferroelectric and Piezoelectric Materials
- Material Dynamics and Properties
- Microwave Dielectric Ceramics Synthesis
- Crystal Structures and Properties
- Nuclear materials and radiation effects
- Mineralogy and Gemology Studies
- Advanced Condensed Matter Physics
- Photonic Crystals and Applications
- Nanomaterials for catalytic reactions
- Magnetic Properties and Applications
Juntendo University
2025
Nagaoka University
2014-2024
Nagaoka University of Technology
2015-2024
Tokyo Institute of Technology
2014-2023
Meguro Parasitological Museum
2014-2021
National Institute of Technology, Oyama College
2021
Osaka University
2018
Tohoku University
2018
Okayama University
2018
Nagoya Institute of Technology
2018
An overview of the catalytic properties intermetallic compounds has been made to provide a comprehensive understanding regarding (1) what catalysts can do, (2) their fundamental roles in enhanced catalysis, and (3) advantages over other inorganic materials. A number chemical transformations using have surveyed classified into three major divisions—hydrogenation/dehydrogenation, oxidation, steam reforming various subsections. The phases obtained from this survey were categorized four types...
Glass-ceramics are noted for their unusual combination of properties and manifold commercialized products consumer specialized markets. Evolution novel glass ceramic processing routes, a plethora new compositions, unique exotic nano- microstructures over the past 60 years led us to review definition glass-ceramics. Well-established emerging methods, such as co-firing, additive manufacturing, laser patterning analyzed concerning core requirements glass-ceramics performance final products. In...
A novel titanosilicate with MWW topology, Ti-MWW, has been prepared by an acid treatment on a corresponding lamellar precursor which is hydrothermally synthesized the coexistence of boron and titanium using piperidine (PI) or hexamethyleneimine (HM) as structure-directing agent. The can be to have Si/Ti ratio low 10 when Si/B gel maintained at 0.75. Both materials PI HM exhibit crystal form thin platelets, while latter shows larger size. Besides tetrahedral Ti species, always contains...
Mesoporous Ti-SBA-15 has been postsynthesized by the titanation of pure silica SBA-15 in glycerol with assistance quaternary organic ammonium hydroxides, and extensively characterized various techniques to investigate mesostructural catalytic properties, chemical nature incorporated Ti species, comparison those Ti-MCM-41. To incorporate tetrahedral species into walls SAB-15, needs be carried out at elevated temperature using an optimum amount hydroxide. samples a Si/Ti ratio ranging from 376...
Nanoparticulate intermetallic PtZn acts as a highly efficient heterogeneous catalyst for chemoselective hydrogenation of halonitrobenzenes to haloanilines. Chloroanilines, bromoanilines, and iodoanilines, including all regioisomers, were obtained with excellent yields (typically >99%) under 1 atm H2 at 40 °C. A gram-scale reaction afforded turnover number (TON) 8600. PtZn/SiO2 could be reused least four times without significant loss catalytic performance. 7-fold higher TOF than Pt/SiO2....
A noble catalytic system based on intermetallic compounds was developed for the chemoselective hydrogenation of p-nitrostyrene (NS) to p-aminostyrene (AS). The main concept catalyst design construct polar active sites consisting two types metals with different electronegativities. We prepared a series Pd- and Rh-based intermetallics investigated their properties in detail transfer nitrobenzene NS presence 4-methyl-1-cyclohexene (MC) or methanol as hydrogen donor. FT-IR studies adsorbed CO...
Intermetallic Pd3Pb supported on Al2O3 can act as a highly efficient heterogeneous catalyst for the oxidation of various amines including primary, secondary, aromatic, aliphatic, and cyclic amines.
Intermetallic Pd3Pb acts as a highly selective alkyne semihydrogenation catalyst that is greatly superior to the conventional Lindlar catalyst. Density functional theory (DFT) calculations demonstrate an ideal adsorption property of Pd3Pb, where surface holds alkynes while releasing alkenes. A tandem catalytic system comprised Pd3Pb/SiO2 for and RhSb/SiO2 alkene isomerization allows one-pot (E)-alkene synthesis from functionalized alkyne, which first success using heterogeneous catalysts....
Unprecedented molecular recognition ability governed by a simple bimetallic surface is reported. A series of Rh-based ordered alloys supported on silica gel (Rh x M y /SiO2, where Bi, Fe, Ga, Ge, In, Ni, Pb, Sb, Sn, or Zn) were tested in the hydrogenation nitrostyrene to form aminostyrene. RhIn/SiO2 showed remarkably high catalytic activity and good selectivity under 1 atm H2 at room temperature. Moreover, various other nitroarenes containing carbonyl, cyano, halo moieties selectively...
Various superconducting glass ceramics based on the Bi-Ca-Sr-Cu-O system with T c (onset)=80∼95 K and (zero)=63∼78 were prepared by a melt-quenching method. The melt-quenched samples of Bi 1.5 CaSrCu 2 O x Ca SrCu found to be transition about 425°C; these became high- superconductors annealing at 820°C.