Visible-Light Sensitive Photocatalytic Activity of FeOx- and P-Modified TiO2 with Rutile Structure

Tomomi Hirai; Yosuke Hayashi; Shinji Iwamoto

doi:10.4028/www.scientific.net/AEF.38.23

Paper Titles

Preface

Growth of Ga₂O₃ Nanowires by a Vapor Transport Method and their Optical Transmittance Spectra
p.3

Optical Absorption and Photoluminescence in Defect-Stannite-Type Semiconductor ZnGa₂Se₄
p.10

Pore Structure of TiO₂- Modified ZrO₂ Particles Prepared by the Glycothermal Method
p.17

Visible-Light Sensitive Photocatalytic Activity of FeO_x- and P-Modified TiO₂ with Rutile Structure
p.23

Increased Current Density of a Redox Flow Battery with a Carbon Paper Partially Modified by Porous Carbon Nanofibers
p.31

Structure, Morphology and Catalytic Activity of PtRu/RGO Prepared by Different Processes
p.38

Dependence of Ionic Conductivity on the Thickness of β-AgI Thin Film Prepared on Polyethylene Terephthalate
p.47

Systematic Evaluation of Hybridization Property and Photo-Crosslinking Ability of Modified Oligonucleotides Containing Benzophenone-Bearing Glycol Nucleoside Analogs
p.57

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Visible-Light Sensitive Photocatalytic Activity of FeO_x- and P-Modified TiO₂ with Rutile Structure

Abstract:

Nanocrystalline rutile TiO₂ particles were prepared via hydrothermal treatment of Ti-containing precursors obtained by low-temperature aging for a transparent diluted HCl solution of amorphous TiO₂. The products were modified with FeO_x and phosphoric acid, and the photocatalytic activities of the obtained catalysts under visible-light irradiation were examined. By the addition of FeO_x or phosphoric acid, the photocatalytic activity of the rutile TiO₂ was slightly increased. On the contrary, by the FeO_x loading and subsequent addition of phosphoric acid, significant increases in the photocatalytic activity were attained. Results of UV-vis suggest that the iron oxides formed on the surface of rutile TiO₂ were changed into highly dispersed iron phosphate species by the addition of phosphoric acid. It was presumed that these species effectively suppress the recombination reaction between the photogenerated electrons and holes and contribute to the high photocatalytic activity of the rutile TiO₂ photocatalysts modified with FeO_x and phosphoric acid.