Abstract

GaOOH nanorods were synthesized fromGa(NO3)3 via afacile microwave hydrothermal method. The obtained sample was characterized by x-ray diffraction,N2 sorption–desorption, UV–vis diffuse reflectance spectroscopy, transmission electron microscopy,electron spin resonance, and x-ray photoelectron spectroscopy. The results revealed thatthe as-synthesized sample was consisted of rod-like particles. It possessed a surface area of14.3 m2 g − 1, and a band gap of 4.75 eV. The photocatalytic property of GaOOH nanorods wasevaluated by the degradation of aromatic compounds (such as benzene and toluene) in anO2 gas stream under ultraviolet (UV) light illumination. The results demonstrated that GaOOHnanorods exhibited superior photocatalytic activity and stability as compared to commercialTiO2 (P25, Degussa Co.) in both benzene and toluene degradation. In the extended (35 h)reaction test toward benzene, GaOOH maintained a high activity, and no obviousdeactivation was observed. A possible mechanism of the photocatalysis over GaOOH isproposed.

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