A5077657746- Graphene research and applications
- Graphene and Nanomaterials Applications
- Advancements in Battery Materials
- Ammonia Synthesis and Nitrogen Reduction
- Advanced Sensor and Energy Harvesting Materials
- Hydrogen Storage and Materials
- Electrocatalysts for Energy Conversion
- Fuel Cells and Related Materials
- Nanomaterials for catalytic reactions
- Dielectric materials and actuators
- Membrane Separation Technologies
- Diamond and Carbon-based Materials Research
- Conducting polymers and applications
- Nanowire Synthesis and Applications
- Extraction and Separation Processes
- Thermal Radiation and Cooling Technologies
- Supercapacitor Materials and Fabrication
- Catalytic Processes in Materials Science
- Electrochemical Analysis and Applications
- Carbon Nanotubes in Composites
- Advanced Thermoelectric Materials and Devices
- Surface and Thin Film Phenomena
- Caching and Content Delivery
- Force Microscopy Techniques and Applications
- Thermal properties of materials
Nagoya University
2023-2025
Toyota Technological Institute
2017-2024
ZnO is a promising candidate for use as an environmentally friendly thermoelectric (TE) material. However, high thermal conductivity leading to poor TE figure-of-merit (zT) needs be addressed achieve significant efficiency commercial applications. Here, we demonstrate that selective enhancement in phonon scattering leads increase the zT of because Al doping and reduced graphene oxide (RGO) encapsulation. These nanocomposites are synthesized via facile scalable method. The incorporation 1 at%...
Graphene oxide (GO) and reduced GO (RGO) have attracted interest as economical alternatives for pristine graphene with controllable properties spanning their applications in many fields. Abundant lattice defects present RGO made physical chemical largely diverse from that of graphene. This makes identification characterization ambiguous the rules applied may not be practical RGO. Here, we report a new insight into thermally monolayer flakes deposited on different commonly used Si-based...
An important part of realizing a carbon-neutral society using ammonia will be the development an inexpensive yet efficient catalyst for synthesis under mild reaction conditions (<400 °C, <10 MPa). Here, we report Fe/K(3)/MgO, fabricated via impregnation method, as highly active (350 1.0 At mentioned conditions, activity Fe/K(3)/MgO (17.5 mmol h-1 gcat-1 ) was greater than that commercial fused iron (8.6 currently used in Haber-Bosch process. K doping found to increase ratio Fe0 on surface...
Fabrication of graphene via oxidation–reduction method is a rewarding approach in terms scalability and cost production. In this regard, restoration the lattice defects presents oxide (GO) during thermal reduction presence carbon source one best alternatives. However, mechanism still unclear. This article ethanol at moderately high temperature by using simple chemical vapor deposition setup, mainly focusing on contribution with increase time to postulate possible mechanism. Raman...
Fabrication of graphene-based transparent conducting films via thermal annealing graphene oxide (GO) is under consideration for commercial mass production as an alternative to high-cost metal oxide-based substrates. Conventional annealing, however, comes with some drawbacks, such high-temperature along longer process times and structural damage that hinders the applicability GO a conductor. Here we report on method fabricating reduced GO-based at low temperature (800 °C) in presence ethanol...
Abstract Here, a facile two‐step reduction method is introduced to fabricate reduced graphene oxide (RGO) films with remarkable structural qualities. Many attempts are made RGO high qualities resembling pristine graphene. However, designing obtain high‐quality more productively highly desirable. To address this matter, in the present work, monolayer are, at first, chemically using mixture of hydroiodic acid and trifluoroacetic vapor within few minutes. Second, thermally 800 °C for 30 min...
We report the synthesis of nitrogen-doped graphene oxide, with 5.7-7.0 wt % nitrogen doping, from different sizes precursor graphite and study its effect on oxygen evolution reaction (OER) activity IrO2 in an acidic medium. The supports are expected to have pyridinic, pyrrolic, graphitic functionalities at ratios responsible for their improved performance. N-doped catalysts synthesized via pyrolysis hydrothermal method using natural synthetic three flake evaluated structural electrochemical...
Germanene, a graphene-like single atomic sheet of germanium (Ge), has attracted much attention due to its exotic properties such as tunable bandgaps and high carrier mobility. However, fabrication germanene-based electronic devices is difficult chemical instability. To overcome this, we aim grow germanene at the graphene/metal interface so that can be protected from oxidation in air. Here, study Ge segregation stacked thin film graphene/gold (Au)/silver (Ag)/Ge on silicon substrate...
We report the contact potential difference and work function variation among graphene-based derivatives, such as graphene oxide, reduced oxide pristine graphene, analyzed by Kelvin probe force microscopy in ambient conditions. The is strongly dependent on amount of oxygen-containing functional groups, moisture or other adsorbates present material, also environmental factors. With removal during reduction decreases, indicating that electrical properties has changed. Moreover, we demonstrate...
Abstract Graphene oxide has great potential as filtration membranes because its permeability and selectivity can be controlled through functional groups. Herein, we studied the morphologies of graphene polyethyleneimine composite membranes. We demonstrated that helps to reduce oxygen-containing groups in such Raman, X-ray photoelectron, Fourier-transform infrared spectroscopies. This indicates thermally annealed tend remove oxygen Furthermore, investigated change due reduction Consequently,...
A Ba-doped Fe/MgO catalyst pre-reduced at 700 °C, much higher than that of conventional Fe catalysts, forms an 0 -core and BaO-shell structure. This enhances ammonia synthesis activity due to electron donation from BaO N 2 via .
Abstract Developing non‐noble metal catalysts with excellent NH 3 synthesis activity under mild conditions is a long‐term goal. The best reported to date often require laborious fabrication methods and controlled environments fabricate the or high temperatures long times activate catalysts. This work introduces facile one‐pot method carbon (C)‐based, barium (Ba)‐promoted cobalt (Co) via citric acid sol–gel nitrates as precursors water solvent. approach ensures homogeneous incorporation of...
In this paper, the piezoresponse of self oriented ultrathin organic ferroelectric Poly (vinylidene fluoride) (PVDF) supported on graphene oxide sheets (GO) is investigated. The surface morphology and PVDF GO are investigated using atomic force microscopy microscopy, respectively. crystallized as nano lamellae in presence indicating preferable nucleation GO. PVDF/GO hybrid structures exhibit a d33 value −8.4 ± 1.3 pm V−1. We believe that piezoelectricity at such reduced dimensions will be...