Nanocrystalline indium-based oxides by tartarate precursor route

Cu2In2O5 with orthorhombic structure and CdIn2O4 spinel oxide have been synthesized by the precursor method via the tartarate route. The complex precursors, (NH4)12[Cu2In2(C4O6H4)2(C4O6H3)6]·6H2O(I) and (NH4)4[CdIn2(C4O6H4)4(OH)4(H2O)2] (II), have been characterized by infrared spectroscopy (IR), ultraviolet–visible spectroscopy (UV–Vis), luminescence spectroscopy, magnetic measurements and thermal analysis. Indium-based oxides have been investigated and characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), UV–vis spectroscopy and magnetic measurements. Both indates are nanocrystalline powders. The average crystallite size is around 40–60 nm.