CEQUINOR   05415
CENTRO DE QUIMICA INORGANICA "DR. PEDRO J. AYMONINO"
Unidad Ejecutora - UE
artículos
Título:
The effect of humic acid binding to magnetite nanoparticles on the photogeneration of reactive oxygen species
Autor/es:
LUCIANO CARLOS; MARIANO CIPOLLONE; DELIA B. SORIA; M. SERGIO MORENO; PETER R. OGILBY; FERNANDO S. GARC√ćA EINSCHLAG; DANIEL O. MARTIRE
Revista:
SEPARATION AND PURIFICATION TECHNOLOGY
Editorial:
ELSEVIER SCIENCE BV
Referencias:
Lugar: Amsterdam; Año: 2012 vol. 91 p. 23 - 23
ISSN:
1383-5866
Resumen:
The goal of this study was to investigate how the binding of humic acids (HA) to magnetite nanoparticles affects the ability of the HA to generate reactive oxygen species (ROS) upon irradiation. To this end, magnetite nanoparticles coated with two different HA were prepared by the co precipitation method. These particles were characterized by several techniques. The nanoparticle sensitized quantum yield of singlet oxygen generation at lambda exc = 400 nm and the quantum efficiencies (lambda exc = 300?550 nm) of hydroxyl radical and hydrogen peroxide generation were measured and compared to the corresponding quantum yields obtained from solutions of the free HA. Despite being bonded to the magnetite nanoparticles, the HA are still able to generate ROS upon irradiation. As with free HA, the yields of ROS generation by the magnetite-bonded HA depend on the particular HA involved.
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