INVESTIGADORES
MORENO Mario Sergio Jesus
artículos
Título:
The effect of humic acid binding to magnetite nanoparticles on the photogeneration of reactive oxygen species
Autor/es:
L. CARLOS; M. CIPOLLONE; D.B. SORIA; M.S. MORENO; P.R. OGILBY; F.S. GARCÍA EINSCHLAG ; D.O. MÁRTIRE
Revista:
SEPARATION AND PURIFICATION TECHNOLOGY
Editorial:
ELSEVIER SCIENCE BV
Referencias:
Lugar: Amsterdam; Año: 2012 vol. 91 p. 23 - 29
ISSN:
1383-5866
Resumen:
The goal of this study was to investigate how the binding of humic acids (HA) to magnetite nanoparticlesaffects the ability of the HA to generate reactive oxygen species (ROS) upon irradiation. To this end, magnetitenanoparticles coated with two different HA were prepared by the co-precipitation method. Theseparticles were characterized by several techniques. The nanoparticle-sensitized quantum yield of singletoxygen generation (UD) at kexc = 400 nm and the quantum efficiencies (kexc = 300–550 nm) of hydroxylradical and hydrogen peroxide generation were measured and compared to the corresponding quantumyields obtained from solutions of the free HA. Despite being bonded to the magnetite nanoparticles, theHA are still able to generate ROS upon irradiation. As with free HA, the yields of ROS generation by themagnetite-bonded HA depend on the particular HA involved.