Preparation of Cd2Ge2O6 Nanorods by a Hydrothermal Method and Their Photocatalytic Performance in Liquid Phase

doi:10.3724/SP.J.1088.2011.10602

Abstract

Abstract: Cd₂Ge₂O₆ nanorods were successfully synthesized by a hydrothermal method using cetyltrimethylammonium bromide, cadmium acetate, and germanium dioxide as the precursors. The prepared samples were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, and UV-Vis diffuse reflectance spectroscopy. The photocatalytic activity was evaluated by the decomposition of methyl orange and salicylic acid in aqueous solution. The active oxygen species in the photocatalytic process were detected by the method of chemiluminescent fluorescence. The results reveal that Cd₂Ge₂O₆ nanorods can be prepared under weak basic conditions by the hydrothermal method. The Cd₂Ge₂O₆ nanorods have a higher photocatalytic activity for decomposing organic pollutants in aqueous solution than the widely used commercial TiO₂. In the photocatalytic process of Cd₂Ge₂O₆, a large number of hydroxyl radicals were produced, which are the main active oxygen species of the photocatalytic system.

Key words: cadmium germanate, nanorod, hydrothermal method, photocatalysis, water pollution

CHEN Jian-Qin, HUANG Jian-Hui. Preparation of Cd2Ge2O6 Nanorods by a Hydrothermal Method and Their Photocatalytic Performance in Liquid Phase[J]. Chinese Journal of Catalysis, 2011, 32(10): 1624-1630.

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