A5004393741- Catalytic Processes in Materials Science
- Catalysis and Oxidation Reactions
- Advanced Photocatalysis Techniques
- Gas Sensing Nanomaterials and Sensors
- Catalysis and Hydrodesulfurization Studies
- Plasma Applications and Diagnostics
- TiO2 Photocatalysis and Solar Cells
- Nanomaterials for catalytic reactions
- Electrocatalysts for Energy Conversion
- Plasma Diagnostics and Applications
- Industrial Gas Emission Control
- Oxidative Organic Chemistry Reactions
- Catalysis for Biomass Conversion
- Polyoxometalates: Synthesis and Applications
- Catalysts for Methane Reforming
- Electron and X-Ray Spectroscopy Techniques
- Gold and Silver Nanoparticles Synthesis and Applications
- Advanced Nanomaterials in Catalysis
- Carbon dioxide utilization in catalysis
- Luminescence Properties of Advanced Materials
- Copper-based nanomaterials and applications
- Air Quality Monitoring and Forecasting
- ZnO doping and properties
- Microwave-Assisted Synthesis and Applications
- X-ray Diffraction in Crystallography
Kyushu University
2016-2025
Fukuoka University
2018
Kasugai Municipal Hospital
2014-2017
Material Sciences (United States)
2015-2016
Shanghai Jiao Tong University
2012-2015
National Institute of Advanced Industrial Science and Technology
1999-2010
Nara Women's University
2003-2007
Kansai University
2004
NTL Institute for Applied Behavioral Science
2000-2001
The University of Tokyo
1993-1997
The decomposition of persistent and bioaccumulative perfluorooctanoic acid (PFOA) in water by UV−visible light irradiation, H2O2 with a tungstic heteropolyacid photocatalyst was examined to develop technique counteract stationary sources PFOA. Direct photolysis proceeded slowly produce CO2, F-, short-chain perfluorocarboxylic acids. Compared the direct photolysis, less effective PFOA decomposition. On other hand, led efficient production F- ions CO2. also suppressed accumulation acids...
The Co3O4 spinel is one of the most promising transition metal oxide (TMO) catalysts for volatile organic compound (VOC) treatment. Substituting effects have usually been utilized to improve catalytic performance spinel. In this study, Cu- and Ni-substituted derived from mixed metal-organic frameworks (MMOFs) retained similar structures but exhibited improved reduced o-xylene oxidation, respectively. Physicochemical characterization DFT calculations revealed that Cu Ni substitution into...
A goal in the characterization of supported metal catalysts is to achieve particle-by-particle analysis charge state strongly correlated with catalytic activity. Here, we demonstrate direct identification individual platinum nanoparticles (NPs) on titanium dioxide using ultrahigh sensitivity and precision electron holography. Sophisticated phase-shift for part NPs protruding into vacuum visualized slight potential changes around NPs. The revealed number (only one six electrons) sense...
The photocatalytic oxidation of benzene to phenol driven by visible light (λ > 420 nm) at room temperature and under ambient pressure is a promising process. In particular, the application heterogeneous catalysts photooxidation, where catalyst product are easily separated, facilitates construction practical processes. Here, we report that Pt-loaded 1D monoclinic WO3 nanorod (Pt/m-WNR) exhibited higher activities than other Pt/WO3 with different crystal structures morphologies in water...
Photocatalytic decomposition of benzene over TiO2 in the gas phase at room temperature was studied with a fixed-bed flow reactor. In humidified airstream ([H2O]=2.2%), efficiently decomposed to CO2 and CO selectivities 93 7%, respectively. The were almost independent conversion, indicating that is not intermediate reaction. selectivity range 7–10% varying concentration O2, H2O, benzene. formation phenol brownish carbonaceous matter attributable polymeric products observed on catalyst...
AgPd@Pd core–shell nanocatalysts loaded on TiO<sub>2</sub> nanoparticles were fabricated using a two-step microwave–polyol method for efficient hydrogen production from decomposition of formic acid.
We developed a new technique for mitigating catalyst deactivation caused by SO2 in exhaust gases. A series of 0.1 wt %-Pt/TiO2 catalysts with different surface, crystal, and pore structures were prepared tested CO oxidation activity the presence H2O. The order under influence was much from that absence SO2. Catalysts high ratio larger pores exhibited higher catalytic H2O temperature range 250-300 °C, whereas other parameters, such as BET surface area crystal structure TiO2 support, had minor...
The interaction between a metal and support, which is known as the metal–support interaction, often plays determining role in catalytic properties of supported catalysts. Herein, we have developed model Pt/CeO2 catalysts, enabled us to investigate interface atomic electronic structures Pt {001}, {011}, {111} planes CeO2 using scanning transmission electron microscopy energy-loss spectroscopy. We found that number Ce3+ ions around nanoparticles followed order {001} > {011} {111}, was opposite...
Photocatalytic oxidation of benzene in gas phase was carried out with a flow reactor at room temperature. In humidified airstream ([H2O] = 2.2%), quantitatively decomposed to CO2 over UV-irradiated 1.0 wt %-Pt/TiO2 catalyst. When the conversion decreased, selectivity while that CO increased. As amount Pt loaded on TiO2 catalyst increased, rate photooxidation almost unchanged. These findings showed Pt/TiO2 proceeded by two sequential steps: (i) and selectivities 94% 6%, respectively, (ii)...
Gas−solid heterogeneous photocatalytic oxidation of aromatic compounds in air was carried out at room temperature with a fixed bed flow reactor. The deposition Rh on TiO2 catalyst improved the durability benzene photooxidation. reduced amounts carbonaceous materials surface that were cause deactivation. highest reaction rate obtained loading 0.5−1.0 wt %. Rh/TiO2 gradually deactivated prolonged photooxidation, due to increasing amount surface. XPS studies showed gradual deactivation related...
Hydrogen generation from water, methane, and methanol was investigated with different types of nonthermal plasma reactors under conditions. With a ferroelectric packed-bed reactor in N/sub 2/, hydrogen gas yield decreased the order: > methane water. A similar trend observed silent discharge reactor, but H/sub 2/ yields were much lower latter reactor. At fixed specific energy densities, higher obtained at flow rates reactions above substrates. The initial water concentration optimized ca....