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dc.contributor.authorYu, C.
dc.contributor.authorYang, K.
dc.contributor.authorShu, Q.
dc.contributor.authorYu, J.
dc.contributor.authorCao, F.
dc.contributor.authorLi, Xin Yong
dc.contributor.authorZhou, X.
dc.identifier.citationYu, C. and Yang, K. and Shu, Q. and Yu, J. and Cao, F. and Li, X.Y. and Zhou, X. 2012. Preparation, characterization and photocatalytic performance of Mo-doped ZnO photocatalysts. Science China Chemistry. 55 (9): pp. 1802-1810.

A series of Mo-doped ZnO photocatalysts with different Mo-dopant concentrations have been prepared by a grinding- calcination method. The structure of these photocatalysts was characterized by a variety of methods, including N 2 physical adsorption, X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared (FT-IR) spectroscopy, photoluminescence (PL) emission spectroscopy, and UV-vis diffuse reflectance spectroscopy (DRS). It was found that Mo 6+ could enter into the crystal lattice of ZnO due to the radius of Mo 6+ (0.065 nm) being smaller than that of Zn 2+ (0.083 nm). XRD results indicated that Mo 6+ suppressed the growth of ZnO crystals. The FT-IR spectroscopy results showed that the ZnO with 2 wt.% Mo-doping has a higher level of surface hydroxyl groups than pure ZnO. PL spectroscopy indicated that ZnO with 2 wt.% Mo-doping also exhibited the largest reduction in the intensity of the emission peak at 390 nm caused by the recombination of photogenerated hole-electron pairs. The activities of the Mo-doped ZnO photocatalysts were investigated in the photocatalytic degradation of acid orange II under UV light (? = 365 nm) irradiation. It was found that ZnO with 2 wt.% Mo-doping showed much higher photocatalytic activity and stability than pure ZnO. The high photocatalytic performance of the Mo-doped ZnO can be attributed to a great improvement in the surface properties of ZnO, higher crystallinity and lower recombination rate of photogenerated hole-electron (e -/h +) pairs. Moreover, the undoped Mo species may exist in the form of MoO 3 and form MoO 3/ZnO heterojunctions which further favors the separation of e -/h + pairs. © Science China Press and Springer-Verlag Berlin Heidelberg 2012.

dc.titlePreparation, characterization and photocatalytic performance of Mo-doped ZnO photocatalysts
dc.typeJournal Article
dcterms.source.titleScience China Chemistry
curtin.departmentDepartment of Chemical Engineering
curtin.accessStatusFulltext not available

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