Formation and characterization of gray Ta2O5 and its enhanced photocatalytic hydrogen generation activity

• Published in: International journal of hydrogen energy Vol. 45; no. 33; pp. 16560 - 16568
• Main Authors: Liu, Wei-Szu, Liao, Ming-Wei, Huang, Sheng-Hsin, Reyes, Yves Ira A., Tiffany Chen, Hsin-Yi, Perng, Tsong-Pyng
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 24.06.2020
• Subjects: DFT calculations; Gray Ta2O5; IPCE; Oxygen vacancy; Photocatalytic hydrogen generation; Surface disorder; Photocatalytic hydrogen generation; IPCE; Gray Ta2O5; Surface disorder; DFT calculations; Oxygen vacancy

White and gray Ta2O5 powders were fabricated by sol-gel and then annealed at 850 °C in air and vacuum, respectively. Analyses by Raman spectroscopy, X-ray photoelectron spectroscopy, transmission electron microscopy, electron paramagnetic resonance spectroscopy, UV-visible reflectance spectroscopy,...