Abstract
Nanosized ZnNb2O6 photocatalysts (band gaps ~4.0 eV) were successfully synthesized via a citrate complex method. Their particle sizes ranged from 50 to 150 nm. The result of Mott–Schottky measurement revealed that the flat-band potential of ZnNb2O6 was ca. −1.3 V versus Ag/AgCl at pH 6.6. The photocatalytic activities of the samples for the degradation of methyl orange were evaluated under UV-light (λ = 254 nm). It was found that the sample obtained at 850 °C showed the highest photocatalytic activity due to its opportune crystallinity and surface area. Furthermore, ·OH radicals were detected as the major oxidation agents responsible for the decomposition of methyl orange.
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Acknowledgments
This work was supported by NNSFC (21177024 and U1033603), 973 Program (2011CB612314) and Program for Changjiang Scholars and Innovative Research Team in University (PCSIRT0818).
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Wu, W., Liang, S., Ding, Z. et al. Low temperature synthesis of nanosized ZnNb2O6 photocatalysts by a citrate complex method. J Sol-Gel Sci Technol 61, 570–576 (2012). https://doi.org/10.1007/s10971-011-2661-y
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DOI: https://doi.org/10.1007/s10971-011-2661-y