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Highly enhanced photocatalytic activity of nanotubular Fe2O3/Fe2WO6 nanocomposite film formed by anodizing FeW alloy
| Title: | Highly enhanced photocatalytic activity of nanotubular Fe2O3/Fe2WO6 nanocomposite film formed by anodizing FeW alloy |
| Authors: | Fadillah, Laras Browse this author | | Kowalski, Damian Browse this author | | Kitano, Sho Browse this author →KAKEN DB | | Zhu, Chunyu Browse this author →KAKEN DB | | Aoki, Yoshitaka Browse this author →KAKEN DB | | Habazaki, Hiroki Browse this author →KAKEN DB |
| Keywords: | Photocatalysis | | Fe2WO6 | | Anodic oxide | | Nanotube |
| Issue Date: | Apr-2023 |
| Publisher: | Elsevier |
| Journal Title: | Electrochemistry Communications |
| Volume: | 149 |
| Start Page: | 107460 |
| Publisher DOI: | 10.1016/j.elecom.2023.107460 |
| Abstract: | This study demonstrates the highly enhanced photocatalytic activity of Fe2O3 nanotubes by making a hetero-junction with Fe2WO6 and doping of W6+ ions into the alpha-Fe2O3 phase for water splitting and decomposition of an organic pollutant. Both nanotubular and compact Fe2O3/Fe2WO6 films are formed by anodizing the magnetron -sputtered Fe-9 at% W alloy in fluoride-containing ethylene glycol electrolyte and subsequent annealing at 450 degrees C. Their photocatalytic activities are compared with W-free nanoporous Fe2O3 film formed on high-purity Fe. The nanotubular Fe2O3/Fe2WO6 film exhibits a markedly enhanced photoelectrochemical oxygen evolution reaction and photocatalytic degradation of methylene blue compared with the nanoporous W-free Fe2O3 film. Because of the larger surface area, the nanotubular Fe2O3/Fe2WO6 film reveals further increased activity than the compact Fe2O3/Fe2WO6 film. The STEM study discloses the dispersion of Fe2WO6 nanoparticles in the alpha-Fe2O3 phase after annealing at 450 degrees C, and XRD analysis shows the possible doping of W species into alpha-Fe2O3. The formation of the W-doped alpha-Fe2O3/Fe2WO6 heterojunction likely promotes the separation of photogenerated electron-hole pairs, enhancing photocatalytic activity. Hence, the nanotubular Fe2O3/Fe2WO6 film is a possible candidate for visible-light-driven photocatalysts. |
| Type: | article |
| URI: | http://hdl.handle.net/2115/89291 |
| Appears in Collections: | 工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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