Effects of Substituting Sr<sup>2+</sup> and Ba<sup>2+</sup> for Ca<sup>2+</sup>on the Structural Properties and Photocatalytic Behaviors of CaIn<sub>2</sub>O<sub>4</sub>

  • Junwang Tang
    Ecomaterials Center, National Institute for Materials Science (NIMS), 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan, and Ecomaterials and Renewable Energy Research Center (ERERC), Nanjing University, 22 Hankou Road, Nanjing 210093, China
  • Zhigang Zou
    Ecomaterials Center, National Institute for Materials Science (NIMS), 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan, and Ecomaterials and Renewable Energy Research Center (ERERC), Nanjing University, 22 Hankou Road, Nanjing 210093, China
  • Jinhua Ye
    Ecomaterials Center, National Institute for Materials Science (NIMS), 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan, and Ecomaterials and Renewable Energy Research Center (ERERC), Nanjing University, 22 Hankou Road, Nanjing 210093, China

書誌事項

公開日
2004-03-30
DOI
  • 10.1021/cm0353815
公開者
American Chemical Society (ACS)

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説明

MIn2O4 (M = Ca, Sr, Ba) semiconductors were synthesized by a simple solid-state reaction and characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), and UV−visible spectrometer. The substitution effects of M2+ ion on the structural and photocatalytic properties for methylene blue (MB) dye degradation were first investigated systematically. It was found that when M goes from Ca to Ba, the crystal structure of these materials changed from orthorhombic to monoclinic structure, resulting in a systematic variation of the photophysical and photocatalytic properties of these materials. Among these semiconductors, CaIn2O4 showed the highest activity in a wide wavelength range of visible light up to 580 nm. The representative product of the MB degradation, SO42-, was examined and indicated that MB was partially mineralized on MIn2O4 (M = Ca, Sr, Ba). The pH value of MB solution and the synthesized temperature of the photocatalyst were also found to have a significant effect on the photocataly...

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