A5006604160- Polyoxometalates: Synthesis and Applications
- Metal-Organic Frameworks: Synthesis and Applications
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Zeolite Catalysis and Synthesis
- Mesoporous Materials and Catalysis
- Catalytic Processes in Materials Science
- Chemical Synthesis and Characterization
- Chemical Synthesis and Reactions
- Catalysis and Oxidation Reactions
- Advanced Nanomaterials in Catalysis
- Advanced Photocatalysis Techniques
- Catalysis and Hydrodesulfurization Studies
- Vanadium and Halogenation Chemistry
- Transition Metal Oxide Nanomaterials
- Electrocatalysts for Energy Conversion
- Covalent Organic Framework Applications
- biodegradable polymer synthesis and properties
- Asymmetric Synthesis and Catalysis
- Catalysis for Biomass Conversion
- Supercapacitor Materials and Fabrication
- Crystallography and molecular interactions
- TiO2 Photocatalysis and Solar Cells
- Synthetic Organic Chemistry Methods
- Nanocluster Synthesis and Applications
Hiroshima University
2015-2024
Suzugamine Women's College
2021
Graduate School USA
2014-2020
Faculty (United Kingdom)
2020
Engineering (Italy)
2020
Japan Science and Technology Agency
2008-2017
University of Delhi
2016
Kanagawa University
2016
Hokkaido University
2004-2014
Constructor University
2012
Linear polymeric polyanions (see picture) are assembled from lacunary polyoxotungstate building blocks and lanthanide cations. Given the large number of polyoxoanions available, a considerable variety new materials is now accessible.
Interaction of the lacunary [alpha-XW9O33](9-) (X = As(III), Sb(III)) with Cu(2+) and Zn(2+) ions in neutral, aqueous medium leads to formation dimeric polyoxoanions, [(alpha-XW9O33)2M3(H2O)3](12-) (M Cu(2+), Zn(2+); X Sb(III)), high yield. The selenium tellurium analogues copper-containing heteropolyanions are also reported: [(alpha-XW9O33)2Cu3(H2O)3](10-) Se(IV), Te(IV)). polyanions consist two [alpha-XW9O33] units joined by three equivalent As, Sb, Se, Te) or Sb) ions. All copper zinc...
This paper describes a facile method to produce three-dimensionally ordered macroporous (3DOM) alumina, iron oxide, manganese chromium and their mixed-metal oxides. An ethylene glycol (EG)−methanol mixed solution of metal nitrates was infiltrated into the void colloidal crystal template monodispersed poly(methyl methacrylate) (PMMA) sphere. Heating initiated nitrate oxidation EG glyoxylate salt. Further heating converted salt oxide decomposed PMMA which produced desired 3DOM Two important...
Three-dimensionally ordered macroporous (3DOM) tungsten(VI) oxide (WO3) was prepared using a colloidal crystal template method. Well-ordered 3DOM WO3 with high pore fraction ammonium metatungstate ((NH4)6H2W12O40), Keggin-type dodecatungstate, as tungsten precursor; materials by other commercially available W precursors, chloride (WCl6), tungsten(V) ethoxide (W(OEt)5), and phosphotungstic acid (H3PW12O40), have low fraction. These were characterized scanning electron microscopy (SEM),...
Cu-loaded AEI catalysts with different P/Al ratios showed a good catalytic performance for NH<sub>3</sub>-SCR of NO<sub>x</sub>.
Many types of zeolites such as beta (hereinafter, *BEA), CHA, LEV, RUT, and MFI were successfully synthesized by interzeolite conversion FAU, *BEA, LEV type starting materials under various hydrothermal synthesis conditions. The crystallization rates using notably elevated compared to observed in conventional syntheses amorphous aluminosilicate gels. This characteristic enhancement the rate results from generation locally ordered species (nanoparts) through decomposition/dissolution zeolite,...
Keggin-type phosphomolybdic acid (PMo12O40), treated with pyridine (Py), forms a crystalline material (PyPMo-HT) following heat treatment under an inert gas flow at ∼420 °C. Although this is known to have attractive catalytic properties for gas-phase oxidation, the origin of activity requires clarification. In study, we investigated crystal structure PyPMo-HT. PyPMo-HT comprises one-dimensional array Keggin units and pyridinium cations (HPy), HPy/Keggin unit ratio ∼1.0. Two oxygen atoms were...
The ammonium salt of the 1:1complex (1) Ce(III) with α1-[P2W17O61]10- was prepared and characterized by elemental analysis, vibrational NMR spectroscopy (31P, 183W), cyclic voltammetry, single-crystal X-ray analysis (P1̄; a = 15.8523(9) Å, b 17.4382(10) c 29.3322(16) α 99.617(1)°, β 105.450 (1)°, γ 101.132(1)°, V 7460.9(7) Å3, Z 2). anion consists centrosymmetric head-to-head dimer, [{Ce(H2O)4(P2W17O61)}2],14- each 9-coordinate Ce cation linked to four oxygens one tungstophosphate oxygen...
A new facile procedure to prepare three-dimensionally ordered macroporous (3DOM) materials of perovskite-type La1-xSrxFeO3 (x = 0−0.4) mixed metal oxides by using colloidal crystal templating method is presented. This can ensure the desired ratio throughout preparation procedure, and single-phase successfully be prepared. Mixed nitrates were dissolved in ethylene glycol−methanol solvent penetrated into template polystyrene spheres. During calcination process, react with glycol converted...
Outstanding catalytic activity for the selective oxidation of acrolein (see picture) is observed with a crystalline metal oxide, Mo3VOx (x≤11.1). The catalyst synthesized from solution containing pentagonal units {Mo(Mo5O27)} (blue), which further react molybdenum and vanadium species (red) to form 3D oxide. Supporting information this article available on WWW under http://www.wiley-vch.de/contents/jc_2002/2007/z603923_s.pdf or author. Please note: publisher not responsible content...
Nano-structured crystalline tungsten(vi) oxides (WO(3)) were prepared using a colloidal crystal template method; these materials have increased specific surface area compared to WO(3) without the template, and after platinum loading they show enhanced photocatalytic activity for acetic acid decomposition under visible light.
Octahedral molecular sieves: Crystalline orthorhombic Mo3VOx (see SEM image), which was prepared by hydrothermal synthesis, contains microchannels made up of seven-membered rings corner-sharing {MO6} octahedra. Small molecules such as methane, ethane, N2, Ar, CO2 can enter the this compound, exhibits type I adsorption behavior typical microporous materials.
Mix and match: The pentagonal [Mo(6)O(21)](n-) polyoxomolybdate building block assembles with other sources of Mo, V, Sb ions to form an orthorhombic Mo-V-Sb oxide. first single-crystal X-ray analysis Mo-V-based oxide, a promising catalyst for light alkane selective oxidation known as the "M1 phase", revealed structure compound.
Four distinct structural types (orthorhombic, trigonal, tetragonal and amorphous) of Mo3VOx catalyst were each synthesized by a hydrothermal method as single phase, characterized structurally tested for oxidative dehydrogenation ethane. A common feature the catalysts is that materials are layer-type structure constructed with pentagonal {Mo6O21} units. The arrangement units can form heptagonal channels to create different features. orthorhombic has microporosity due open adsorbing nitrogen...
Shape-controlled fabrication process for oxide nanotubes (ZrO2, Al2O3, and SiO2) by using carbon nanofibers templates was developed. By thick, thin, coiled as templates, shapes of could be controlled, that is, a variety attractive nanotubular materials synthesized.
We have synthesized the mono-ruthenium substituted Keggin-type silicotungstate [SiW(11)O(39)Ru(III)(H(2)O)](5-) (1a) by reaction of mono-lacunary precursor [SiW(11)O(39)](8-) with Ru(acac)(3) under hydrothermal conditions and isolated as caesium salt Cs(5)[SiW(11)O(39)Ru(III)(H(2)O)] (1). The DMSO-coordinated complex [SiW(11)O(39)Ru(III)(DMSO)](5-) (2a) was prepared 1a DMSO in aqueous solution at 353 K caesium-potassium mixed Cs(4.9)K(0.1)[SiW(11)O(39)Ru(III)(DMSO)] (2). Both compounds 1 2...