溶液法およびスパッタ法により形成したTiO2/BaTiO3積層膜の圧電光触媒効果

カテゴリ: 論文誌(論文単位)

グループ名: 【E】センサ・マイクロマシン部門

発行日: 2024/07/01

タイトル(英語): Piezo-photocatalytic Effect on Oxidative Decomposition of Organic Dye Using Spin-coated and Sputter-deposited TiO2/BaTiO3 Films

著者名: 田中　悠太（立命館大学 理工学部 機械工学科），嶋倉　啓太（立命館大学 理工学部 機械工学科），伊藤　生龍（立命館大学 理工学部 機械工学科），小林　大造（立命館大学 理工学部 機械工学科）

著者名(英語): Yuta Tanaka (Ritsumeikan University), Keita Shimakura (Ritsumeikan University), Seiryu Ito (Ritsumeikan University), Taizo Kobayashi (Ritsumeikan University)

キーワード: 圧電光触媒，圧電分極，超音波振動，酸化チタン，チタン酸バリウム　　piezophotocatalyst，piezoelectric polarization，ultrasonic vibration，TiO2，BaTiO3

要約(英語): This study proposes a TiO2/BaTiO3 heterojunction piezophotocatalytic films on a Ti substrate to enhance photocatalytic reactions by reactive carrier accumulation using piezoelectric polarization. Photocatalytic oxidation degrees were compared between the proposed TiO2/BaTiO3 piezophotocatalyst and a conventional TiO2 photocatalyst, when the combination of light illumination (wavelength: 370 nm) and ultrasonic vibration were applied. The reactivity of piezophotocatalyst was characterized by measuring color bleaching of methylene blue dye. When piezophotocatalyst and conventional photocatalyst were exposed to UV illumination with ultrasonic vibration at 45 kHz, an 11% higher optical transmission through methylene blue aqueous solution was observed one hour after the start of UV irradiation onto piezophotocatalyst. Although solution-processed and sputter-deposited TiO2/BaTiO3 films exhibited similar photocatalytic color bleaching performances under the light illumination and vibration conditions for maximum performance, the vibration frequency dependency was observed. BaTiO3 coated with different particle products were also comparatively characterized.

本誌: 電気学会論文誌E（センサ・マイクロマシン部門誌） Vol.144 No.7 （2024） 特集：第40回「センサ・マイクロマシンと応用システム」シンポジウム受賞論文

本誌掲載ページ: 189-194 p

原稿種別: 論文／日本語

電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejsmas/144/7/144_189/_article/-char/ja/