Ag-BiOCl nanocomposites prepared by the oxygen vacancy induced photodeposition method with improved visible light photocatalytic activity

摘要

Ag-BiOCl nanocomposites were prepared through a visible light induced photodeposition method by taking the advantage of oxygen vacancy in {001} facets of BiOCl. The prepared Ag-BiOCl (Vis-Ag-BiOCl) could efficiently degrade methyl orange (MO) and oxidize NO under visible light irradiation. Moreover, it exhibited an enhanced visible light driven photocatalytic activity compared to Ag-BiOCl (UV-Ag-BiOCl) nanocomposites prepared by the traditional UV light photodeposition method, even that the latter showed a much stronger visible light absorption ability. Photocurrent and electrochemical impedance spectroscopy (EIS) tests indicated that the more efficient photoinduced charge separation and transfer in Vis-Ag-BiOCl could be attributed to the improvement of the visible light photocatalytic activity. (C) 2015 Elsevier B.V. All rights reserved.