Adsorption and Photodegradation Reactions of Anionic Dye on Zn-Al-substituting Layered Double Hydroxide

DOI Web Site 2 Citations
  • Morimoto Kazuya
    Nano-structure Control Group, Photocatalytic Materials Center, National Institute for Materials Science
  • Tamura Kenji
    Nano-structure Control Group, Photocatalytic Materials Center, National Institute for Materials Science
  • Ye Jinhua
    Advanced Materials Group, Photocatalytic Materials Center, National Institute for Materials Science
  • Yamada Hirohisa
    Nano-structure Control Group, Photocatalytic Materials Center, National Institute for Materials Science

Abstract

The preparation of layered double hydroxide (LDH) substituting Zn in the structure was attempted to create an environmentally.friendly photocatalyst with anion adsorption capacities. Zn-Al-substituting LDH with the Zn/Al molar ratio of 4 was synthesized by adopting the natural processes. The adsorption property of an anionic dye, methyl orange, on Zn-Al-substituting LDH was characterized by batch experiment. Zn-Al-substituting LDH exhibited an extremely high affinity for MO anions. The photodegradation behavior of methyl orange on Zn-Al-substituting LDH was evaluated by determining ultraviolet-visible absorption spectra under ultraviolet light irradiation. The results indicated that Zn-Al-substituting LDH certainly showed the photocatalytic activities for methyl orange, and the degradation reaction of methyl orange was accelerated without being stabilized under ultraviolet irradiation. It was expected that Zn-Al-substituting LDH could be utilized as an efficient photocatalyst for harmful organic anions.

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