Polymorphic synthesis and structural characterization of NaSbO3 prepared by sol–gel acrylamide polymerization

The formation of the NaSbO3 polymorphic compound obtained by sol–gel acrylamide polymerization is reported. Thermogravimetric analysis (TGA) results show between room temperature to 800 ​°C surface dehydration, decomposition of hydrochloric acid, ammonium hydroxide, decarbonization and denaturalization of the organic part. First, prepared 1:1 of Sb2O3 and Na2CO3 sol's reagents. After, each sol made was mixed with the chelating agent, EDTA (ethylenediaminetetraacetic acid) and combines with (Na+1, Sb+3) metal ions to form stable chelates, regardless the charge on the cation. To start the polymerization and accelerate the gel formation (2–3 ​s), it is added acrylamide (H2C = CHCONH2) monomer, the cross-linker, N, N'-methylene bisacrylamide (C7H10N2O2) and α,α'-azodiisobutyramidine dihydrochloride (C8H18N6·2HCl) which aid to regulate the weight of acrylamide increasing the interconnections velocity and crystal formation on a nanometric scale average 27–94 ​nm. [Display omitted] •Study the real influence on thermodynamic stability in the unit cell.•Study of thermodynamic equilibrium and kinetics to obtain the rhombohedral polymorphic compound NaSbO3.•Gel dried with liquid Nitrogen.•AFM reveal large polyhedral crystals between 0.312 and 1.474 ​μm.•The nano-cluster and nano-crystals size by SGAP determined is between 27.9 and 94.6 ​nm.