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Lotus-Root-Like In 2 O 3 Nanostructures: Fabrication, Characterization, and Photoluminescence Properties

2007; American Chemical Society; Volume: 111; Issue: 36 Linguagem: Inglês

10.1021/jp073177p

1932-7455

Cuiqing Wang, Dairong Chen, Xiuling Jiao, Changlong Chen,

Transition Metal Oxide Nanomaterials

Novel lotus-root-like In2O3 nanostructures with a diameter of ca. 300 nm and a length of 1.5−4.0 μm have been prepared by annealing In(OH)3 nanostructures with the same morphology derived from a mild solution reaction. The hierarchical nanostructures are composed of several segments aggregated orderly from In2O3 nanorods with the length of 50−90 nm and diameter of 15−40 nm. The as-prepared products were characterized by X-ray powder diffractometry (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared (FT-IR), and X-ray photoelectron spectra (XPS) in detail. Furthermore, the effects of reaction parameters on the formation of nanostructures were also discussed, and the hydrolysis and oriented-aggregation mechanism was proposed. Room-temperature photoluminescence (PL) spectra of the In2O3 nanostructure showed the peculiar visible emission from the blue to orange region, with the strongest peak centered at 468 nm.