Different hollow and spherical TiO2 morphologies have distinct activities for the photocatalytic inactivation of chemical and biological agents
| Autor: | Masahiko Ikekita, Sho Usuki, Takahito Shimodo, Kazuya Nakata, Akira Fujishima, Kanjiro Torigoe, Ken-ichi Katsumata, Hideki Sakai, Yuuichi Yamaguchi, Chiaki Terashima |
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| Rok vydání: | 2016 |
| Předmět: |
Anatase
Morphology (linguistics) Light Photocatalytic decomposition Metal Nanoparticles Nanotechnology 02 engineering and technology Crystal structure 010402 general chemistry 01 natural sciences Organic compound Catalysis law.invention chemistry.chemical_compound X-Ray Diffraction law Escherichia coli Calcination Dimethyl Sulfoxide Physical and Theoretical Chemistry chemistry.chemical_classification Allolevivirus Titanium Dimethyl sulfoxide technology industry and agriculture equipment and supplies 021001 nanoscience & nanotechnology 0104 chemical sciences Methylene Blue chemistry Chemical engineering Photocatalysis Microscopy Electron Scanning Spectrophotometry Ultraviolet 0210 nano-technology |
| Zdroj: | Photochemicalphotobiological sciences : Official journal of the European Photochemistry Association and the European Society for Photobiology. 15(8) |
| ISSN: | 1474-9092 |
| Popis: | The inactivation of Escherichia coli and Qβ phage was examined following their photocatalytic treatment with TiO2 hollows and spheres that had been prepared by electrospray, hydrothermal treatment, and calcination. The crystal structures of the hollows and spheres were assigned to TiO2 anatase, and the surface areas of the hollows and spheres were determined to be 91 and 79 m(2) g(-1), respectively. Interestingly, TiO2 spheres exhibited higher anti-pathogen performance than TiO2 hollows, a difference we ascribe to the prevention of light multi-scattering by microorganisms covering the surfaces of the TiO2 particles. The photocatalytic decomposition of dimethyl sulfoxide (DMSO) in the presence of TiO2 hollows and spheres was examined in order to study the dependence of photocatalytic activity on TiO2 morphology for the size scale of the reactants. TiO2 hollows provided greater photocatalytic decomposition of DMSO than did TiO2 spheres, in contrast to the pattern seen for pathogen inactivation. Fabrication of photocatalysts will need to vary depending on what substance (e.g., organic compound or biological agent) is being targeted for environmental remediation. |
| Databáze: | OpenAIRE |
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