Water-soluble magnetic nanoparticles functionalized with photosensitizer for photocatalytic application

Kyong Hoon Choi, Kang Kyun Wang, Eon Pil Shin, Seung Lim Oh, Jin Seung Jung, Hwan Kyu Kim, Yong Rok Kim

Research output: Contribution to journalArticlepeer-review

47 Citations (Scopus)


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 (ΦΔ) and releasing yield (ηΔ) 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.

Original languageEnglish
Pages (from-to)3212-3219
Number of pages8
JournalJournal of Physical Chemistry C
Issue number8
Publication statusPublished - 2011 Mar 3

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films


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