1 Introduction</h5> In recent years, environmental problems such as air pollution, soil contamination, especially the contamination of aquatic systems have become the major environmental concern  . Semiconductor photocatalysis as a cost-effective and green technology has provided an alternative way for environment purification and solar energy conversion [2,3] . Among the various semiconductors, TiO 2 and ZnO are widely used for degradation of the pollutants due to their chemical stability, low-cost and environmentally friendly features [4,5] . However, due to their wide band gap, only the ultraviolet light (4% of the solar light spectrum) can be absorbed, which greatly limits their visible-light photocatalytic activity and practical application  . To handle this problem, several attempts have been made to shift their absorption band from UV to visible light region  , allowing absorption of more photons from solar irradiation and enhancing their photocatalytic activity under visible light irradiation [8,9] .</P>Recently, silver halide (AgX)-based catalysts have been reported to exhibit excellent photocatalytic activity in the degradation of organic dyes [10,11] . Therefore, considerable attention has been paid to certain variety of AgX based composite photocatalysts. The general way is loading AgX particles as visible light active components on different
Applied Surface Science – Elsevier
Published: Dec 1, 2014
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