Facile fabrication of highly efficient AgI/ZnO heterojunction and its application of methylene blue and rhodamine B solutions degradation under natural sunlight

Facile fabrication of highly efficient AgI/ZnO heterojunction and its application of methylene... 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 [1] . 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 [6] . To handle this problem, several attempts have been made to shift their absorption band from UV to visible light region [7] , 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 http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Applied Surface Science Elsevier

Facile fabrication of highly efficient AgI/ZnO heterojunction and its application of methylene blue and rhodamine B solutions degradation under natural sunlight

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Publisher
Elsevier
Copyright
Copyright © 2014 Elsevier B.V.
ISSN
0169-4332
eISSN
1873-5584
D.O.I.
10.1016/j.apsusc.2014.09.103
Publisher site
See Article on Publisher Site

Abstract

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 [1] . 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 [6] . To handle this problem, several attempts have been made to shift their absorption band from UV to visible light region [7] , 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

Journal

Applied Surface ScienceElsevier

Published: Dec 1, 2014

References

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