Antimony potassium tartrate

Single source precursor, antimony potassium tartrate, was used for the preparation of Sb₂O₃, KSb₃O₅, K_0.51Sb _0.67 ^III Sb ₂ ^V O_6.26, and KSbO₃. Antimony trioxide (Sb₂O₃) was prepared by hydrothermal method, while potassium antimony oxides (KSbO₃, K_0.51Sb _0.67 ^III Sb ₂ ^V O_6.26, and KSbO₃) were obtained from the thermal decomposition of antimony potassium tartrate. All the compounds were characterized by powder X-ray diffraction (PXRD), thermogravimetric analysis (TG), Fourier transform infrared spectroscopy (FT-IR), UV–Vis diffuse reflectance spectra, and scanning electron microscopy (SEM). The decomposition process of antimony potassium tartrate with temperature was given. The product formation at different temperatures of thermal decomposition was monitored by PXRD and FT-IR. The TG profile of antimony potassium tartrate shows mass loss at three regions. The infrared spectra of parent and decomposed products gave characteristic Sb-O bands. The band gap energy of decomposed products was obtained. The SEM diagrams of Sb₂O₃ show different morphologies. Direct solid state preparation of KSb₃O₅ and K_0.51Sb _0.67 ^III Sb ₂ ^V O_6.26 under identical experimental conditions was unsuccessful.