AgV7O18: A new silver vanadate semiconductor with photodegradation ability on dyes under visible-light irradiation

摘要

A new silver vanadate semiconductor AgV7O18 was prepared via the hydrothermal synthesis method. The sample crystallized in typical nanorods with a big length/diameter ratio and large specific surface area. The detailed band structures were reported. AgV7O18 nanorods have small band energy of 1.837 eV with indirect allowed electronic transitions. The narrowed band-gap is due to the hybridization between the Ag-d and O-p states in the valence band. The photocatalysis was investigated by photo-degradation of Rhodamine-B (RhB) irradiated by visible light. AgV7O18 has efficient photodegradation on RhB. The photocatalysis was discussed according to the band energy positions and the trapping experiments. (C)0 2016 Elsevier B.V. All rights reserved.