Composition dependence of AgSbO₃/NaNbO₃ composite on surface photovoltaic and visible-light photocatalytic properties

摘要

The visible-light-active xAgSbO₃/NaNbO₃ (x=0.5, 1, 2, 4, 6) composite photocatalysts were prepared by a conventional solid-state reaction method. Composition dependences on the structure, optical, surface photoelectronic and photocatalytic properties were investigated. The absorption edge of the composites could be red-shifted increasing the amount of AgSbO₃ in comparison with that of NaNbO₃. The surface photovoltage response shows the selectivity for the amount of AgSbO₃ in the samples. The photocatalytic activities for Rhodamine B degradation exhibit a parabola-like behavior with the amount of AgSbO₃. The highest photocatalytic activity is observed on the AgSbO₃/NaNbO₃ composite due to the better dispersiveness, electron transfer and surface photoelectric properties.