The synthesis of new β-Ga2O3 microstructures was achieved through rapid annealing of GaSe single crystal at 850 °C in oxygen-ammonia co-flow for 30-120 min duration. The obtained micro-flowers and micro-leaves were carefully characterized through X-ray diffraction, scanning electron microscopy and Raman spectroscopy. SEM images demonstrated that the product consisted of flower-shaped microstructures, which as time elapsed evolved into leaves-like dendritic microstructures. These microstructures started off directly from oxidized single crystal. A possible growth mechanism was also proposed. Experimental results evidenced that synthesized microstructures exhibited good photocatalytic activity, better than commercial TiO2 powder (Degussa P25).

Synthesis of β-Ga2O3 microstructures with efficient photocatalytic activity by annealing of GaSe single crystal

FILIPPO, Emanuela;TEPORE, MARCO;BALDASSARRE, FRANCESCA;SICILIANO, Tiziana;QUARTA, Gianluca;CALCAGNILE, Lucio;TEPORE, Antonio
2015-01-01

Abstract

The synthesis of new β-Ga2O3 microstructures was achieved through rapid annealing of GaSe single crystal at 850 °C in oxygen-ammonia co-flow for 30-120 min duration. The obtained micro-flowers and micro-leaves were carefully characterized through X-ray diffraction, scanning electron microscopy and Raman spectroscopy. SEM images demonstrated that the product consisted of flower-shaped microstructures, which as time elapsed evolved into leaves-like dendritic microstructures. These microstructures started off directly from oxidized single crystal. A possible growth mechanism was also proposed. Experimental results evidenced that synthesized microstructures exhibited good photocatalytic activity, better than commercial TiO2 powder (Degussa P25).
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11587/396241
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