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A rod-shaped BiPO_4 photocatalyst was prepared by a simple hydrothermal method for light-induced catalytic degradation of stable aromatic compounds such as benzene in gas phase under ambient conditions.The samples were subjected to various technical characterizations including X-ray diffraction(XRD),transmission electron microscopy(TEM),UV/vis and FTIR spectrum,to determine the crystal structure,morphology,and optical properties of the as-prepared photocatalysts.Results indicate that BiPO_4 exhibits much higher photocatalytic activity and stability under UV light irradiation than that of commercial TiO_2(Degussa P25) in the degradation of benzene to CO_2.The active radical species involved in the degradation reactions over BiPO_4 photocatalyst have been investigated by the spin-trapping electron paramagnetic resonance(EPR) spectra and a photoluminescence technique.Theoretical calculations reveal that BiPO_4 contains highly-dispersive conduction bands,enabling high mobility of the photo-generated carries and therefore leading to fast charge transfer and separation.
A rod-shaped BiPO 4 photocatalyst was prepared by a simple hydrothermal method for light-induced catalytic degradation of stable aromatic compounds such as benzene in gas phase under ambient conditions. The samples were subjected to various technical characterizations including X-ray diffraction (XRD), Transmission electron microscopy (TEM), UV / vis and FTIR spectra, determine crystal structure, morphology, and optical properties of the as-prepared photocatalysts. Results indicate that BiPO_4 exhibits much higher photocatalytic activity and stability under UV light irradiation than that of commercial TiO 2 (Degussa P25) in the degradation of benzene to CO 2. The active radical species involved in the degradation reactions over BiPO 4 photocatalyst have been investigated by the spin-trapping electron paramagnetic resonance (EPR) spectra and a photoluminescence technique. BiPO_4 contains highly-dispersive conduction bands, enabling high mobility of the photo -generated carries and therefore leading to fast charge transfer and separation.