Water-Soluble Magnetic Nanoparticles Functionalized with Photosensitizer for Photocatalytic Application

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• 作者：Kyong-Hoon Choi ; Kang-Kyun Wang ; Eon Pil Shin ; Seung-Lim Oh ; Jin-Seung Jung ; Hwan-Kyu Kim ; Yong-Rok Kim
• 刊名：Journal of Physical Chemistry C
• 出版年：2011
• 出版时间：March 3, 2011
• 年：2011
• 卷：115
• 期：8
• 页码：3212-3219
• 全文大小：1052K
• 年卷期：v.115,no.8(March 3, 2011)
• ISSN：1932-7455

文摘

We report a novel photofunctional magnetic nanoparticle that is strategically designed and prepared by simple modification process. Photofunctionality is provided by the photosensitizer (PS) of [5,15-bis(phenyl)-10,20-bis(4-methoxycarbonylphenyl)porphyrin]platinum that generates singlet oxygen in high quantum yield. The PS molecules are covalently bonded to the surface of magnetic nanoparticles. Microstructure and magnetic and photophysical properties of the photofunctional magnetic nanoparticles are investigated by transmission electron microscopy, vibrating sample magnetometry, and time-resolved spectroscopic methods. The results show that the immobilized PS molecules retain their optical and functional properties including the high efficiency of singlet oxygen generation. Generation quantum yield (桅_螖) and releasing yield (畏_螖) of singlet oxygen from the prepared photofunctional magnetic nanoparticles are 0.47 and 0.42, respectively. Furthermore, the photofunctional magnetic nanoparticles have good solubility and stability in water, which are induced by the surface modification process. The photocatalytic experiment is demonstrated by utilizing the oxidation reaction of 2,4,6-trichlorophenol with the photofunctional magnetic nanoparticles.