[21a-222-1~11] 6.3 酸化物エレクトロニクス

▲ [21a-222-11] Effect of Zr doping on the structural and optical properties of BiVO₄

〇(D)ABDELLAOUI imane IMANE¹、Mikas Remeika¹、Shigeru Ikeda²、Takato Kawaguchi²、M.Monirul Islam¹、Tsuyoshi Maeda³、Takayoshi Kusumoto³、Takahiro Wada³、Christian Budich⁴、Takeaki Sakurai¹ (1.Tsukuba Univ.、2.Konan Univ.、3.Ryukoku Univ.、4.Tokyo Instruments)

キーワード：photocatalyst, water splitting, O2-evolving photocatalyst

Generation of hydrogen and oxygen fuels using sunlight via water splitting process is ultimate solution of energy crisis and climate change. For this application, semiconductor with a correct band line-up which photocatalyses with visible light and does not corrode in water is of interest and monoclinic scheelite bismuth vanadate (ms-BiVO₄, n-type semiconductor, band gap 2.4 eV), is an excellent choice. However, photocatalytic activity of BiVO₄ is considerably limited by poor photoexcited charge transport from bulk to the surface. Zirconium (Zr) doping into solution-synthesized ms-BiVO₄ powder enhances its photocatalytic activity for O₂ evolution [1]. In this work we inspect the variations of the structural and optical properties of BiVO₄ powder, introduced by the Zr doping, and compare our results with molybdenum (Mo) doped BiVO₄ that is also known to enhance performance of BiVO₄.