Statistical optimization of experimental parameters for synthesis of manganese carbonate and manganese oxide nanoparticles

Taguchi robust design was used for optimization of direct precipitation reaction conditions in order to simple and fast synthesis of manganese carbonate nanoparticles. Manganese carbonate nanoparticles were synthesized in this study by addition of manganese ion solution to the aqueous carbonate reagent. Effects of several reaction variables, such as manganese and carbonate concentrations, flow rate of reagent addition and temperature on particle size of prepared manganese carbonate were investigated. The significance of these parameters in tuning the size of manganese carbonate particles was quantitatively evaluated by analysis of variance. The results showed that manganese concentration and carbonate concentration in the solutions and also flow rate have significant effects in preparation of manganese carbonate nanoparticles. Also, optimum conditions for synthesis of manganese carbonate nanoparticles via precipitation reaction were proposed. Analysis of variance showed that under the optimum condition, the size of manganese carbonate nanoparticles will be about 54 ± 12 nm. In another part of this study, solid state thermal decomposition reaction of precursor was used for preparation of Mn2O3 nanoparticles. The results showed that Mn2O3 nanoparticles synthesized via thermal decomposition of manganese carbonate nanoparticles have average size of 90 nm.

MnCO3 nanoparticles were synthesized via direct precipitation. Taguchi robust design was used to optimize experimental parameters of precipitation reaction for obtaining desired characteristics. Also, calcination of MnCO3 nanoparticles is a suitable way for preparation of manganese oxide nanoparticles.Figure optionsDownload as PowerPoint slideHighlights
► MnCO3 nanoparticles were synthesized via simple and fast precipitation method.
► Synthesis procedure was carried out without any surfactant, template or catalyst.
► Variables of reaction were optimized by Taguchi design to obtain nanoparticles.
► Mn2O3 nanoparticles were prepared by calcination of precursor nanoparticles.
► Prepared nanoparticles were characterized by XRD, FT-IR and TG-DTA techniques.