A5023055947- Advanced Photocatalysis Techniques
- Mesoporous Materials and Catalysis
- TiO2 Photocatalysis and Solar Cells
- Catalytic Processes in Materials Science
- Polyoxometalates: Synthesis and Applications
- Aerogels and thermal insulation
- Covalent Organic Framework Applications
- Iron oxide chemistry and applications
- Supercapacitor Materials and Fabrication
- Layered Double Hydroxides Synthesis and Applications
- Gas Sensing Nanomaterials and Sensors
- Polymer Nanocomposites and Properties
- Copper-based nanomaterials and applications
- Advanced Nanomaterials in Catalysis
- CO2 Reduction Techniques and Catalysts
- Multiferroics and related materials
- Perovskite Materials and Applications
- Conducting polymers and applications
- Electrocatalysts for Energy Conversion
- Zeolite Catalysis and Synthesis
- Ferroelectric and Piezoelectric Materials
- Synthesis and properties of polymers
- Surface Modification and Superhydrophobicity
- Silicone and Siloxane Chemistry
- Advanced battery technologies research
Tokyo Denki University
2024
Tokyo University of Science
2003-2023
Yanshan University
2023
Sophia University
2012-2019
National Institute for Materials Science
2009-2018
Zero to Three
2014
The University of Tokyo
2003-2009
Japan Science and Technology Agency
2009
Abstract Nanoporous carbon–cobalt‐oxide hybrid materials are prepared by a simple, two‐step, thermal conversion of cobalt‐based metal–organic framework (zeolitic imidazolate framework‐9, ZIF‐9). ZIF‐9 is carbonized in an inert atmosphere to form nanoporous carbon–metallic‐cobalt materials, followed the subsequent oxidation air, yielding hybrids. The resulting evaluated as electrocatalysts for oxygen‐reduction reaction (ORR) and oxygen‐evolution (OER) KOH electrolyte solution. exhibit similar...
Mesoporous Pt–Au binary alloys were electrochemically synthesized from lyotropic liquid crystals (LLCs) containing corresponding metal species. Two-dimensional exagonally ordered LLC templates prepared on conductive substrates diluted surfactant solutions including water, a nonionic surfactant, ethanol, and species by drop-coating. Electrochemical synthesis using such enabled the preparation of mesoporous without phase segregation. The framework composition in alloy was controlled simply...
We fabricated a highly efficient (with solar-to-electricity conversion efficiency (η) of 8.1%) Pt-free dye-sensitized solar cell (DSSC). The counter electrode was made cobalt sulfide (CoS) nanoparticles synthesized via surfactant-assisted preparation metal organic framework, ZIF-67, with controllable particle sizes (50 to 320 nm) and subsequent oxidation conversion. In contrast conventional Pt electrodes, the CoS exhibited higher external surface areas roughness factors, as evidenced by...
Abstract This account deals with recent trends and challenges regarding photo(electro)chemical solar fuels produced by CO2 reduction water splitting. The process is limited product selectivity, catalyst stability, its complex reaction mechanism. A variety of catalysts—including thermocatalysts, photocatalysts, electrocatalysts, combinations photo- electrocatalysts—have been employed to facilitate selective durable reduction. In addition, the roles supporting electrolyte, pH, temperature,...
The current research work deals with the preparation of TiO2 and GO/TiO2 composite by simple, chemical, cost effective hydrothermal method. Graphene oxide (GO) is prepared modified Hummer's Dispersion GO achieved an ultrasonic cleaning bath for 1 h. using a power 200 W at frequency 40 kHz. catalyst material characterized different characterization techniques. XRD study confirms polycrystalline in nature. synthesized photocatalyst materials are used to photocatalytic degradation salicylic...
An efficient evaporation-induced coating method combining microwave-assisted hydrothermal transformation and annealing is developed to fabricate an ideal electrode material from composites with a layer of hydrous RuO2 on mesoporous silica nanoparticles (MSNs), for high-performance supercapacitor. Total RuO2-based specific capacitances are as high 1125 2000 F g−1, respectively. As service our authors readers, this journal provides supporting information supplied by the authors. Such materials...
Photocatalytic TiO2/SiO2 coatings with excellent superhydrophilic wettability were prepared on light-weight polycarbonate substrates for self-cleaning applications. The effect of distinct SiO2 concentrations (0–40%) in TiO2 the morphology, wettability, UV–Vis transmittance, haze, and durability was studied detail. 20% silica showed wetting properties a smooth uniform morphology more than 85% transmittance. lower haze value confirms their clear optical appearance. A low-friction layer...
We report a new synthetic route for preparation of nanoporous carbon nitride fibers with graphitic polymers, by calcination Al-based porous coordination polymers (Al-PCPs) dicyandiamide (DCDA) under nitrogen atmosphere.
Abstract The present work reports synthesis of cobalt hydroxide (Co(OH) 2 ) rods on nickel foam and its supercapacitor application. Hierarchical Co(OH) with length approximately 3.5 μm diameter 400 nm were prepared by one‐step, simple, inexpensive chemical‐bath‐deposition method. direct growth the Ni gave three dimensional (3D) structure for easy access electrolyte throughout material surface. Also, well‐adhered interface between Ni‐foam surface better conduction channels. Detailed...
Functionalized magnetic iron oxide/alginate core-shell nanoparticles for targeting hyperthermia Shih-Hsiang Liao,1 Chia-Hung Liu,2 Bishnu Prasad Bastakoti,3 Norihiro Suzuki,7 Yung Chang,4 Yusuke Yamauchi,3 Feng-Huei Lin,5,6 Kevin C-W Wu1,6 1Department of Chemical Engineering, National Taiwan University No 1, Taipei, 2Department Urology, Taipei Medical University-Shuang Ho Hospital, New City, Taiwan; 3National Institute Materials Science, Ibaraki, Japan; 4R&D Center Membrane Technology and...
Mesoporous titania and zirconia nanoparticles (MTN MZrN, respectively) exhibiting a desired specific surface area porous structure, different acidity, crystallinity were successfully synthesized through controlled hydrolysis method post-treatments without the utilization of surfactants. The catalytic activities MTN MZrN investigated for conversion cellulose to glucose 5-hydroxymethylfurfural (HMF) in an ionic liquid (i.e., 1-ethyl-3-methylimidazolium chloride, [EMIM]Cl) system. amount...
Abstract Core–shell Fe 3 O 4 @silica magnetic nanoparticles functionalized with a strong base, triazabicyclodecene (TBD), were successfully synthesized for harvesting microalgae and one‐pot microalgae‐to‐fatty acid methyl ester (FAME, or so‐called biodiesel) conversion. Three types of algae oil sources (i.e., dried algae, oil, concentrate) used the reaction conditions optimized to achieve maximum biodiesel yield. The results obtained in this study show that our TBD‐functionalized could...
Colored wide-bandgap semiconductor oxides with abundant mid-gap states have long been regarded as promising visible light responsive photocatalysts. However, their catalytic activities are hampered by charge recombination at deep level defects, which constitutes the critical challenge to practical applications of these oxide To address challenge, a strategy is proposed here that includes creating shallow-level defects above deep-level and thermal activating migration trapped electrons out...
Titanium oxide (TiO2) is a potential photocatalyst for removing toxic NOx from the atmosphere. Its practical application is, however, significantly limited by its low absorption into visible light and high degree of charge recombination. The overall photocatalytic activity TiO2 remains too since it can utilize only about 4–5% solar energy. Nitrogen doping lattice takes advantage utilizing wide range radiation increasing capability towards region. In this work, N-doped TiO2, referred to as...
In this research work, we reported the synthesis of a spherical-shaped bismuth vanadate (BiVO4) photocatalyst using cost-effective, simple, chemical hydrothermal method and studied effect deposition temperatures on structural, morphological, optical properties, etc. The XRD result confirmed monoclinic scheelite phase BiVO4. An XPS study occurrence Bi, V, O elements also found that Bi V exist in +3 +5 oxidation states, respectively. SEM micrographs revealed morphology BiVO4 photocatalyst....
Herein, overall improvement in the electrochemical performance of manganese dioxide is achieved through fine-tuning microstructure partially Co-doped nanomaterial using facile hydrothermal method with precise control preparative parameters. The structural investigation exhibits formation a multiphase compound accompanied by controlled reflections α-MnO2 as well γ-MnO2 crystalline phases. morphological examination manifests presence MnO2 nanowires having width 70–80 nm and length several...
Klar und deutlich: Ein leistungsstarkes schnelles elektrochromes Display (ECD) mit passiver Matrix wurde aus einem Leukofarbstoff einer nanoporösen TiO2-Elektrode konstruiert (siehe Bild). Die senkrechten Poren verhindern eine Bewegung der Farbstoffmoleküle führen dadurch zu klaren Bildern bei hohen Frequenzen. Mit farbigen Variante dieses ECD könnten konkurrenzfähige elektrische Reflektivdisplays entwickelt werden.
Abstract Well‐organized mesoporous carbon impregnated with In 2 O 3 nanoparticles can be used as supercapacitor electrodes. The uniformly distributed in the matrix are effectively utilized for enhancement of capacitive performance.