Controlled dispersion of ZnO nanoparticles produced by basic precipitation in solvothermal processes
Author
dc.contributor.author
Navas, Daniel
Author
dc.contributor.author
Ibáñez, Andrés
Author
dc.contributor.author
González, Iván
Author
dc.contributor.author
Palma, Juan Luis
Author
dc.contributor.author
Dreyse, Paulina
Admission date
dc.date.accessioned
2021-08-23T19:46:51Z
Available date
dc.date.available
2021-08-23T19:46:51Z
Publication date
dc.date.issued
2020
Cita de ítem
dc.identifier.citation
Heliyon 6 (2020) e05821
es_ES
Identifier
dc.identifier.other
10.1016/j.heliyon.2020.e05821
Identifier
dc.identifier.uri
https://repositorio.uchile.cl/handle/2250/181402
Abstract
dc.description.abstract
Zinc oxide nanoparticles were successfully synthesized under precipitation processes, using ZnSO4⋅7H2O as a Zn2þ
precursor and K2CO3 used as a basic source, and hydrozincite was obtained as an intermediary, which was treated
under two procedures; first procedure involved multiple stages to get final precipitated with NaOH, and in the
second procedure the hydrozincite was straightforwardly dried at 220 C. By both processes ZnO structures were
obtained, which were turned into nanoparticles by a solvothermal treatment, for four hours in ethylene glycol at
200 C. The final products for the first procedure was conglomerate of spherical nanoparticles with sizes ranged
between 5–10 nm and dispersed ellipsoidal nanoparticles for the second procedure.
Apart off the two procedures mentioned above, another synthesis was carried out with the same Zn2þ precursor
but now using NaOH, and the solvothermal treatment produced ZnO mixed micro-structures which under ultrasonic
cavitation disaggregated on mesoporous ZnO nanoplates of hexagonal shapes with nanopore sizes of
approximately 0.35 nm. All ZnOs synthesized were structurally characterized with XRD, TEM and FT–IR techniques,
and electronically with UV–Vis absorption and diffuse reflectance spectroscopies.
es_ES
Patrocinador
dc.description.sponsorship
USM project PI_M_2020_31
ANID (FONDECYT) Chile 11180185
1201173
1201491
Universidad Central de Chile CIP2018002
CIP2018006
Comision Nacional de Investigacion Cientifica y Tecnologica (CONICYT)
CONICYT PIA/BASAL AFB180001