Abstract

In(OH) 3 and InOOH crystals were synthesized at different temperatures by diglycol-mediated solvothermal processes. Their phase structures, morphologies and growth mechanisms were investigated by X-ray powder diffraction (XRD), scanning electron microscopy (SEM) and chemical analysis. A small quantity of ((H 2O) 3In)Cl 3 was observed in In(OH) 3 crystals, which resulted in formation of In(OH) 3 crystals with complicated shapes and morphologies. In(OH) 3 grew along [1 0 0] direction, while ((H 2O) 3In)Cl 3 grew preferentially along several crystal directions. In-situ transformation from both In(OH) 3 and ((H 2O) 3In)Cl 3 to InOOH developed at temperature higher than 140 °C, consequently InOOH nanoparticles partly inherited the morphologies of In(OH) 3 nanorods.

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