Green synthesis and photoluminescence property of AlOOH nanoflakes

• Completely green synthesis of AlOOH nanoflakes
• XRD, FTIR, EDX and TEM results confirmed the formation of AlOOH nanoflakes.
• Photoluminescence property of the AlOOH nanoflakes was studied.

A thorough green route (which adopts common and nontoxic reactants, and generates no by-product) was developed for the synthesis of AlOOH nanoflakes. AlOOH nanoflakes were synthesized conveniently through hydrothermal treatment of Al2O3 powder in deionized water at 190 °C for 12–24 h, without the use of any extra additive or template. The characterization results from X-ray diffraction, Fourier transformed infrared spectroscopy, energy dispersive X-ray spectroscopy and transmission electron microscopy confirmed the preparation of AlOOH nanoflakes, which were deficient in oxygen. Furthermore, the room temperature photoluminescence properties of the as-synthesized products were tested. It was found that all the as-synthesized products exhibited a strong emission peak centering at around 583 nm upon 291 nm excitation at room temperature, so they had potential application as a photoluminescent material.

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