The understanding of the polymorphism of In2O3 has evoked recent interest in terms of fundamental scientific and technological aspects. A simple yet effective hydro/solvothermal route was introduced for the preparation of In2O3 nanocrystals with different phases using In(acac)3 as indium source. Through adjusting the systemic amount of water, the hydrolysis reaction of In3+ can be efficiently controlled. Moreover, the phases and morphologies of products can also be regulated. Meanwhile, the photocatalytic property of the prepared corundum-type In2O3 was also measured, which showed superior photocatalytic performance on the decomposition of phenol compared to that of cubic phase In2O3 nanocubes.
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