Zn doped Ba germanate nanorods have been prepared by the hydrothermal process and characterized
by X-ray diffraction (XRD), scanning electron microscopy (SEM) and solid UV-vis diffuse reflectance
spectroscopy. XRD analysis shows that the Zn doped Ba germanate nanorods consist of hexagonal Ba2Ge5O12
and rhombohedral ZnGeO3 phases. The size and band gap of the Zn doped Ba germanate nanorods depend on
the Zn doping mass percentage. The band gap of the 1wt.% Zn doped Ba germanate nanorods is 4.07 eV
which is smaller than that of undoped and Zn doped Ba germanate nanorods with the Zn doping mass percentage of 3%,
5% and 10%. The role of the irradiation time and content of the nanorods in aqueous solution has been analyzed. The
1wt.% Zn doped Ba germanate nanorods show the highest photocatalytic activity under UV light irradiation. The photocatalytic
activity has been greatly enhanced by the Zn doping.
Keywords: Ba germanate nanorods, Zn doping; scanning electron microscopy, photocatalysis, UV light.
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