Taro Ikarashi

Photoxidative Decomposition of Aqueous Chlorophenols Under Aeration Using a Photosensitizer Dye Nanoparticle Coated Membrane of Methylene Blue and Silica Nanoparticle

Yukiko Takahashi

We have proposed Photosensitizer Dye Nanoparticle-Coated Membranes (PDNMs) is not eluted into water for singlet oxygen (1O2) generation. Moreover, the PDNMs were highly resistant to photobleaching of dye itself. In this study, to evaluate the method of perfect air supply to the PDNM, it was aimed at system degrades 2-chlorophenol (2-cp) and 4-chlorophenol (4-cp).The PDNM composed of Methylene Blue (MB) and silica nanoparticle nanocomposite was fabricated by mixing cationic MB and silica in an aqueous solution and then passing the resulting nanocomposite dispersion through a membrane. Oxidative degradation of chlorophenols was carried out based on 1O2 generated by visible light irradiation to MB/silica loaded PDNM. The generation of 1O2 from the PDNM was evaluated by using RNO, reagent and applying to two different ways of aeration, one is ventilating air through the PDNM, the other is only bubbling. The fading rate of RNO with ventilation became 2.4 times higher than that with bubbling. 2-cp and 4-cp were efficiently degraded by UV irradiation to the PDNM with ventilation

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