Low-Temperature Synthesis of Cu-Doped Anatase TiO<sub>2</sub> Nanostructures via Liquid Phase Deposition Method for Enhanced Photocatalysis
Titanium dioxide (TiO<sub>2</sub>) photocatalysis can harness the energy from sunlight, providing a solution to many green- and energy-related problems. In this study, we aimed to produce Cu doped TiO<sub>2</sub> (Cu-TiO<sub>2</sub>) structures at a low temperatur...
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MDPI AG
2023-01-01
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| Online Access: | https://www.mdpi.com/1996-1944/16/2/639 |
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| author | Mitsuhiro Honda Tsuyoshi Ochiai Popy Listiani Yuma Yamaguchi Yo Ichikawa |
| author_facet | Mitsuhiro Honda Tsuyoshi Ochiai Popy Listiani Yuma Yamaguchi Yo Ichikawa |
| author_sort | Mitsuhiro Honda |
| collection | DOAJ |
| description | Titanium dioxide (TiO<sub>2</sub>) photocatalysis can harness the energy from sunlight, providing a solution to many green- and energy-related problems. In this study, we aimed to produce Cu doped TiO<sub>2</sub> (Cu-TiO<sub>2</sub>) structures at a low temperature (~70 °C) under atmospheric pressure based on liquid phase deposition. The products prepared with Cu nitrate exhibited anatase-phase TiO<sub>2</sub> with the presence of Cu, and the particles showed a waxberry-like structure. Changing the Cu nitrate concentration allowed control of the atomic concentration; we confirmed ~1.3 atm.% of Cu ions in the product when we applied 10 mM in the precursor solution. By doping Cu, the light absorption edge shifted to 440 nm (~2.9 eV), and we proved the photocatalytic reaction through action spectral measurement. We observed the decomposition of acetaldehyde into CO<sub>2</sub> on Cu-TiO<sub>2</sub> photocatalysts, which produced optimized improvements in photocatalytic activity at Cu dopant levels between 0.2 and 0.4 atm.%. This study demonstrates that the liquid phase deposition technique can be used for doping metallic ions into TiO<sub>2</sub>, which shows promise for preparing novel and unique nanomaterials as visible light photocatalysts. |
| first_indexed | 2024-03-09T11:50:21Z |
| format | Article |
| id | doaj.art-56b468d1f76d4f54a051ab99de354280 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-09T11:50:21Z |
| publishDate | 2023-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-56b468d1f76d4f54a051ab99de3542802023-11-30T23:16:05ZengMDPI AGMaterials1996-19442023-01-0116263910.3390/ma16020639Low-Temperature Synthesis of Cu-Doped Anatase TiO<sub>2</sub> Nanostructures via Liquid Phase Deposition Method for Enhanced PhotocatalysisMitsuhiro Honda0Tsuyoshi Ochiai1Popy Listiani2Yuma Yamaguchi3Yo Ichikawa4Graduate School of Engineering, Nagoya Institute of Technology, Nagoya 466-8555, JapanMaterials Analysis Group, Kawasaki Technical Support Department, Kanagawa Institute of Industrial Science and TEChnology (KISTEC), Kawasaki 213-0012, JapanGraduate School of Engineering, Nagoya Institute of Technology, Nagoya 466-8555, JapanGraduate School of Engineering, Nagoya Institute of Technology, Nagoya 466-8555, JapanGraduate School of Engineering, Nagoya Institute of Technology, Nagoya 466-8555, JapanTitanium dioxide (TiO<sub>2</sub>) photocatalysis can harness the energy from sunlight, providing a solution to many green- and energy-related problems. In this study, we aimed to produce Cu doped TiO<sub>2</sub> (Cu-TiO<sub>2</sub>) structures at a low temperature (~70 °C) under atmospheric pressure based on liquid phase deposition. The products prepared with Cu nitrate exhibited anatase-phase TiO<sub>2</sub> with the presence of Cu, and the particles showed a waxberry-like structure. Changing the Cu nitrate concentration allowed control of the atomic concentration; we confirmed ~1.3 atm.% of Cu ions in the product when we applied 10 mM in the precursor solution. By doping Cu, the light absorption edge shifted to 440 nm (~2.9 eV), and we proved the photocatalytic reaction through action spectral measurement. We observed the decomposition of acetaldehyde into CO<sub>2</sub> on Cu-TiO<sub>2</sub> photocatalysts, which produced optimized improvements in photocatalytic activity at Cu dopant levels between 0.2 and 0.4 atm.%. This study demonstrates that the liquid phase deposition technique can be used for doping metallic ions into TiO<sub>2</sub>, which shows promise for preparing novel and unique nanomaterials as visible light photocatalysts.https://www.mdpi.com/1996-1944/16/2/639photocatalysisliquid phase depositioncopper dopinglow-temperature synthesis |
| spellingShingle | Mitsuhiro Honda Tsuyoshi Ochiai Popy Listiani Yuma Yamaguchi Yo Ichikawa Low-Temperature Synthesis of Cu-Doped Anatase TiO<sub>2</sub> Nanostructures via Liquid Phase Deposition Method for Enhanced Photocatalysis Materials photocatalysis liquid phase deposition copper doping low-temperature synthesis |
| title | Low-Temperature Synthesis of Cu-Doped Anatase TiO<sub>2</sub> Nanostructures via Liquid Phase Deposition Method for Enhanced Photocatalysis |
| title_full | Low-Temperature Synthesis of Cu-Doped Anatase TiO<sub>2</sub> Nanostructures via Liquid Phase Deposition Method for Enhanced Photocatalysis |
| title_fullStr | Low-Temperature Synthesis of Cu-Doped Anatase TiO<sub>2</sub> Nanostructures via Liquid Phase Deposition Method for Enhanced Photocatalysis |
| title_full_unstemmed | Low-Temperature Synthesis of Cu-Doped Anatase TiO<sub>2</sub> Nanostructures via Liquid Phase Deposition Method for Enhanced Photocatalysis |
| title_short | Low-Temperature Synthesis of Cu-Doped Anatase TiO<sub>2</sub> Nanostructures via Liquid Phase Deposition Method for Enhanced Photocatalysis |
| title_sort | low temperature synthesis of cu doped anatase tio sub 2 sub nanostructures via liquid phase deposition method for enhanced photocatalysis |
| topic | photocatalysis liquid phase deposition copper doping low-temperature synthesis |
| url | https://www.mdpi.com/1996-1944/16/2/639 |
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