Preparation and Photocatalytic Property of Phosphorus-doped TiO2 Particles
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概要
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Phosphorus-doped titania powders were prepared by a sol-gel method using titanium (IV) tetrabutoxide and sodium hypophosphite as starting materials. The as-prepared products were characterized by XRD, XPS, TEM and UV-vis spectroscopy. The TiO2 powders calcined at 400°C for 5 h in an N2 atmosphere showed an anatase structure. The crystallinity of TiO2 was improved by calcination both in air and in N2 atmospheres. Furthermore, UV-vis spectroscopy analysis indicated that the absorption edge of the samples shifted to a longer wavelength after calcination. The XRD results suggested that phosphorus was doped into the crystal lattice of TiO2. The electronic states of phosphorus were determined by XPS, which indicated that the phosphorus in the prepared titania powders was in a lower oxidization state than the pentavalent oxidation state of phosphorus. Also, the photocatalytic activity was tested by observing the photodecomposition of methylene blue.
著者
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Takahashi Masashi
Department Of Animal And Grassland Research National Agricultural Center For Kyushu Okinawa Region
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Kobayashi Koichi
Department Of Basic Sciences Ishinomaki Senshu University
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Natori Hirotaka
Department of Chemistry and Energy Engineering, Musashi Institute of Technology
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Kobayashi Koichi
Department Of Anesthesiology And Resuscitology Shinshu University School Of Medicine
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Natori Hirotaka
Department of Chemistry and Energy Engineering, Tokyo City University (Former Name; Musashi Institute of Technology)
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