Coprecipitation of nickel zinc malonate: A facile and reproducible synthesis route for Ni1-xZnxO nanoparticles and Ni1-xZnxO/ZnO nanocomposites via pyrolysis
(2015) Journal of Solid State Chemistry — Vol. 230, p. 381-389 (2015)
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- Abstract
- Nanoparticles of Ni1-xZnxO and Ni1-xZnxO/ZnO, which can be good candidates for selective gas sensors, were successfully obtained via a two-step synthetic route, in which the nickel zinc malonate precursor was first synthesized by co-precipitation from an aqueous solution, followed by pyrolysis in air at a relatively low temperature (~500 °C). The precursor was characterized by ICP-AES, FTIR and TG and the results indicate the molecular structure of the precursor to be compatible with Ni1-xZnx(OOCCH2COO).2H2O. The decomposition product, characterized using various techniques (FTIR, XRD, ToF-SIMS, SEM, TEM and XPS), was established to be a doped nickel oxide (Ni1-xZnxO for 0.01≤ x ≤0.1) and a composite material (Ni1-xZnxO/ZnO for 0.2≤ x≤0.5). To elucidate the form in which the Zn is present in the NiO structure, three analytical techniques were employed: ToF-SIMS, XRD and XPS. While ToF SIMS provided a direct evidence of the presence of Zn in the NiO crystal structure, XRD showed that Zn actually substitutes Ni in the structure and XPS is a bit more specific by indicating that the Zn is present in the form of Zn2+ ions.
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Université de Yaoundé I Laboratoire de physico-chimie des matériaux
Citations
Lontio Fomekong, R., Delcorte, A., Lambi Ngolui, J., Hermans, S., KENFACK TSOBNANG, P., & Magnin, D. (2015). Coprecipitation of nickel zinc malonate: A facile and reproducible synthesis route for Ni1-xZnxO nanoparticles and Ni1-xZnxO/ZnO nanocomposites via pyrolysis. Journal of Solid State Chemistry, 230, 381-389. https://doi.org/10.1016/j.jssc.2015.07.040 (Original work published 2015)