Selective Oxidative Degradation of Organic Pollutants by Singlet Oxygen-Mediated Photosensitization: Tin Porphyrin versus C<sub>60</sub> Aminofullerene Systems

DOI Web Site PubMed 被引用文献4件 参考文献37件
  • Heechan Kim
    Water Research Center, Korea Institute of Science and Technology, Seoul 136-791, Korea
  • Wooyul Kim
    Environmental Science and Engineering, Pohang University of Science and Technology, Pohang 790-784, Korea
  • Yuri Mackeyev
    Chemistry, Smalley Center for Nanoscale Science and Technology, Rice University, Houston, Texas 77005, United States
  • Gi-Seon Lee
    Applied Chemistry, Kumoh National Institute of Technology, Gumi 730-701, Korea
  • Hee-Joon Kim
    Applied Chemistry, Kumoh National Institute of Technology, Gumi 730-701, Korea
  • Takashi Tachikawa
    The Institute of Scientific and Industrial Research, Osaka University, Osaka 567-0047, Japan
  • Seokwon Hong
    Water Research Center, Korea Institute of Science and Technology, Seoul 136-791, Korea
  • Sanghyup Lee
    Water Research Center, Korea Institute of Science and Technology, Seoul 136-791, Korea
  • Jungbae Kim
    Chemical and Biological Engineering, Korea University, Seoul 136-701, Korea
  • Lon J. Wilson
    Chemistry, Smalley Center for Nanoscale Science and Technology, Rice University, Houston, Texas 77005, United States
  • Tetsuro Majima
    The Institute of Scientific and Industrial Research, Osaka University, Osaka 567-0047, Japan
  • Pedro J. J. Alvarez
    Civil and Environmental Engineering, Rice University, Houston, Texas 77005, United States
  • Wonyong Choi
    Environmental Science and Engineering, Pohang University of Science and Technology, Pohang 790-784, Korea
  • Jaesang Lee
    Water Research Center, Korea Institute of Science and Technology, Seoul 136-791, Korea
  • 환경공학부
  • 10105056
  • Choi, W

説明

This study evaluates the potential application of tin porphyrin- and C(60) aminofullerene-derivatized silica (SnP/silica and aminoC(60)/silica) as (1)O(2) generating systems for photochemical degradation of organic pollutants. Photosensitized (1)O(2) production with SnP/silica, which was faster than with aminoC(60)/silica, effectively oxidized a variety of pharmaceuticals. Significant degradation of pharmaceuticals in the presence of the 400-nm UV cutoff filter corroborated visible light activation of both photosensitizers. Whereas the efficacy of aminoC(60)/silica for (1)O(2) production drastically decreased under irradiation with λ550 nm, Q-band absorption caused negligible loss of the photosensitizing activity of SnP/silica in the long wavelength region. Faster destruction of phenolates by SnP/silica and aminoC(60)/silica under alkaline pH conditions further implicated (1)O(2) involvement in the oxidative degradation. Direct charge transfer mediated by SnP, which was inferred from nanosecond laser flash photolysis, induced significant degradation of neutral phenols under high power light irradiation. Self-sensitized destruction caused gradual activity loss of SnP/silica in reuse tests unlike aminoC(60)/silica. The kinetic comparison of SnP/silica and TiO(2) photocatalyst in real wastewater effluents showed that photosensitized singlet oxygenation of pharmaceuticals was still efficiently achieved in the presence of background organic matters, while significant interference was observed for photocatalyzed oxidation involving non-selective OH radical.

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