Abstract
A new photocatalyst, Ag nanoparticles (NPs) and reduced graphene oxide (RGO) co-decorated TiO(2) nanotube arrays (NTs) (Ag/RGO-TiO(2) NTs), was designed and facilely produced by combining electrodeposition and photoreduction processes. The structures and properties of the photocatalysts were characterized. The ternary catalyst exhibited almost 100% photocatalytic removal efficiency of typical herbicide 2,4-dichlorophenoxyacetic acid (2,4-D) from water under simulated solar light irradiation. The photodegradation rate toward 2,4-D over Ag/RGO-TiO(2) NTs is 11.3 times that over bare TiO(2) NTs. After 10 successive cycles with 1600 min of irradiation, Ag/RGO-TiO(2) NTs maintained as high 2,4-D removal efficiency as 97.3% with excellent stability and easy recovery, which justifies the photocatalytic system a promising application for herbicide removal from water.
Copyright © 2012 Elsevier B.V. All rights reserved.
Publication types
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Research Support, Non-U.S. Gov't
MeSH terms
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2,4-Dichlorophenoxyacetic Acid / isolation & purification*
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2,4-Dichlorophenoxyacetic Acid / radiation effects
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Adsorption
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Catalysis
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Graphite / chemistry*
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Graphite / radiation effects
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Herbicides / isolation & purification*
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Herbicides / radiation effects
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Light
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Microscopy, Electron, Scanning
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Microscopy, Electron, Transmission
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Nanotubes / chemistry*
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Nanotubes / radiation effects
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Oxidation-Reduction
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Oxides / chemistry
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Photochemical Processes
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Silver / chemistry*
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Silver / radiation effects
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Surface Properties
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Titanium / chemistry*
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Titanium / radiation effects
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Water Pollutants, Chemical / isolation & purification*
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Water Pollutants, Chemical / radiation effects
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Water Purification / instrumentation
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Water Purification / methods*
Substances
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Herbicides
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Oxides
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Water Pollutants, Chemical
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titanium dioxide
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2,4-Dichlorophenoxyacetic Acid
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Silver
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Graphite
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Titanium