Structural, magnetic, optical and photocatalytic properties of Co-doped ZnO nanocrystals.
ACOSTA-HUMÁNEZ, Manuel Fernando; MAGON, Claudio José; VIDES, Luis Montes; JIMENEZ, Juan; ALMANZA, Ovidio.
ACOSTA-HUMÁNEZ, Manuel Fernando; MAGON, Claudio José; VIDES, Luis Montes; JIMENEZ, Juan; ALMANZA, Ovidio.
Abstract: Energy levels associated with several crystalline defects, such as zinc (VZn) and oxygen (VO) vacancies, Zn and O interstitials (Zni and Oi respectively), Zn and O antisite defects, and charged oxygen vacancies Vo-, among others, are generated by the introduction of cobalt (Co) into the structure. The effective introduction of Co into the Zn occupancy site was evaluated by XRD and electron paramagnetic resonance. The EPR spectra remain consistent across all doping concentrations of Co2+ ions and revealed intriguing features linked to four distinct Co2+ paramagnetic centers; among them, a pair of Co2+ ions exhibited ferromagnetic coupling. ZnO nanocrystals doped with cobalt were produced by sol gel and their use as photocatalysts were evaluated in the degradation of the Congo red pollutant. The degradation efficiency improved by more than 50% when compared to the efficiency of pure ZnO nanocrystals at the same activity time.
@article={003239318,author = {ACOSTA-HUMÁNEZ, Manuel Fernando; MAGON, Claudio José; VIDES, Luis Montes; JIMENEZ, Juan; ALMANZA, Ovidio.},title={Structural, magnetic, optical and photocatalytic properties of Co-doped ZnO nanocrystals},journal={International Journal of Molecular Sciences},note={v. 26, n. 5, p. 2117-1-2117-21},year={2025}}