A5018174964- Ga2O3 and related materials
- Advanced Photocatalysis Techniques
- ZnO doping and properties
- Semiconductor materials and interfaces
- Analytical Chemistry and Sensors
- Electron and X-Ray Spectroscopy Techniques
- Conducting polymers and applications
- Silicon and Solar Cell Technologies
- Electrochemical Analysis and Applications
- Electronic and Structural Properties of Oxides
- Catalytic Processes in Materials Science
Osaka City University
2017-2019
Japan Women's University
2010
We have examined the photocatalytic activity of Ga2O3 supported on Al2O3 (Ga2O3/Al2O3 catalyst) without a noble metal cocatalyst for water splitting and reduction CO2 with under UV light irradiation by changing loading amount Ga2O3. All prepared Ga2O3/Al2O3 catalysts show activities both reduction, their are significantly improved compared to those nonsupported Al2O3. The is dominated less than 1.0 vol % loaded, whereas higher Ga2O3-loaded samples (2.6, 4.2 %). Crystalline structure...
Ga 2 O 3 samples with different crystalline structures were prepared by calcination of a gallium nitrate powder around 800 K. mixed phases γ and β showed high photocatalytic activity for CO production from reduction water, the was even higher than that an Ag‐loaded β‐Ga 3. The increased time. increase attributed to appearance GaOOH resulting interaction water during reaction as revealed XRD XPS analyses. In situ FT‐IR measurements bicarbonates bidentate carbonate species adsorbed on GaOOH....
Various metal oxides with 0.1 wt% Ag loaded as a cocatalyst were prepared by an impregnation method and examined their photocatalytic activity for CO 2 reduction water. Among all the Ag‐loaded oxides, Ga O 3 , ZrO Y MgO, La showed activities H productions under ultraviolet light irradiation. Thus, involving cations closed shell electronic structures such d 0 10 s had potential In situ Fourier transform infrared measurement revealed that selectivity production are controlled amount chemical...
To promote photocatalytic activity of gallium oxides (Ga2O3) on CO2 reduction with water under visible light irradiation, we have tried nitrogen doping into Ga2O3 different crystalline structures. In diffuse reflectance UV-vis spectra, absorption bands appeared in the region after and edge shifted to a longer wavelength increasing temperature. N K-edge XANES analysis clearly showed two kinds species doped samples; nitride (GaN) molecular like nitrogen. XRD patterns, at temperatures above 823...
We have evaluated the electric characteristics of an organic surfactant material, n-Cethyl-trimethyl-ammonium Bromide (C16TAB) to fabricate p-n homo-junction. This C16TAB was dissolved in pure water, where potassium iodide (KI) added. The impurities adaptation has been processed this mixed solution with application voltage. KI is ionized water and ion moved negative electrode iodine positive electrode. collected vicinity both electrodes separately, dried it samples. measured resistivities...