Effects of precursor concentration and reaction time on sonochemically synthesized ZnO nanoparticles
AUTOR(ES)
Pholnak, Chat, Sirisathitkul, Chitnarong, Suwanboon, Sumetha, Harding, David James
FONTE
Mat. Res.
DATA DE PUBLICAÇÃO
03/12/2013
RESUMO
The sonochemical reaction between Zn(NO3)2 and hexamethylenetetramine (HMT) resulted in different products depending on amounts of Zn(II) cations in the aqueous solution. Crystalline phase pure ZnO nanoparticles were obtained by using 0.05 M Zn(NO3)2-HMT. This single phase was formed by low power sonication for 20 min in an ultrasonic bath at ambient conditions and its morphology did not change for the next 60 min. Higher concentrations of precursors (0.1 and 0.5 M) led to a mixture of zinc compounds including plate-like Zn5(OH)8(NO3)2(H2O). In contrast, a mixed phase ZnO/Zn5(OH)6(CO3)2 and a single phase Zn5(OH)6(CO3)2 were formed when the precursor concentrations were decreased to 0.01 and 0.005 M, respectively. The resulting infrared absorption and ultraviolet/visible emission were dependent on the phases and defects in these zinc compounds.
Documentos Relacionados
- Influence of ZnO Nanoparticles and a Non-Nano ZnO on Survival and Reproduction of Earthworm and Springtail in Tropical Natural Soil
- Nanoparticles of ZnO Doped With Mn: Structural and Morphological Characteristics
- Application of biosynthesized ZnO nanoparticles on an electrochemical H 2 O 2 biosensor
- Studies on the Growth Control of ZnO Nanostructures synthesized by the Chemical Method
- Effects of addition of engineered ZnO nanoparticles on the stability of colloidal suspensions containing TiO2 interacting with sandy soil