In2O3 Nanorod Bundles Derived from a Novel Precursor and In2O3 Nanoaggregates: Controllable Synthesis, Characterization, and Property Studies

An indium-ethylene glycol-ethylenediamine (In-EG-EDA) complex precursor with a nanorod bundle structure was controllably synthesized in EG solvent via an EDA-assisted solvothermal process at 180 degrees C. The morphologies and phase structures of the samples were found to depend strongly on the pH values and alkaline reagents. This complex precursor was Subsequently calcined at 640 degrees C in air, resulting in the formation of cubic phase In2O3 nanorod bundles without changing its one-dimensional morphology. In addition, In2O3 nanoaggregates with a diameter of 20 nm call be directly obtained using ammonia as alkaline reagent. A possible mechanism was proposed to explain the formation of In-EG-EDA nanorod bundles and In2O3 nanoaggregates. Both the In2O3 nanorod bundles and the nanoaggregates showed wide emission peaks from the ultraviolet to visible region in photoluminescence spectra.