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Visible-light absorptivity of a zincoxysulfide (ZnOxS1-x) composite semiconductor and its photocatalytic activities for degradation of organic pollutants under visible-light irradiation

Title
Visible-light absorptivity of a zincoxysulfide (ZnOxS1-x) composite semiconductor and its photocatalytic activities for degradation of organic pollutants under visible-light irradiation
Author(s)
Kim, ChamDho, Seok JuLee, Se GeunLee, Sung JunKim, Hoyoung
Issued Date
2007-10
Citation
Applied Catalysis A: General, v.330, no.1-2, pp.127 - 133
Type
Article
Author Keywords
photocatalystvisible lightZnSZnOzincoxysulfide (ZnOxS1-x)
Keywords
TITANIUM-DIOXIDEVisible-Light IlluminationVisible LightWATERZincoxysulfide (ZnOxS1-x)ZincoxysulfidesZnOCalcinationCatalystComposite SemiconductorsCoprecipitationDEPOSITIONZnSLight AbsorptionNITROGEN-DOPED TiO2Organic PollutantsOXIDATIONPhotocatalysisPhotocatalystPhotodegradationSemiconductor MaterialsSOLID-SOLUTIONSolid SolutionsSURFACESUSPENSIONS
ISSN
0926-860X
Abstract
This work reports the development of a visible-light sensible photocatalyst and the photocatalytic degradation of organic pollutants under visible-light irradiation. A composite semiconductor of ZnS and ZnO was prepared through co-precipitation process of Zn(NO3)2 in the mixed solution of aqueous Na2S and NaOH followed by calcination at 400 °C in N2 atmosphere. It was revealed that the composite semiconductor was a solid solution of ZnS and ZnO, a zincoxysulfide (ZnOxS1-x) having advanced visible-light absorptivity. It was assured that the visible-light absorptivity was caused by modification of band structure while the solid solution had been prepared, thus we suggested a reasonable band structure model involved in a zincoxysulfide. To observe its photocatalytic activity under visible-light illumination, photodegradation test was done and we confirmed that zincoxysulfide showed predominant photocatalytic activity due to its superior visible-light absorptivity to pure ZnS and ZnO. © 2007 Elsevier B.V. All rights reserved.
URI
http://hdl.handle.net/20.500.11750/2519
DOI
10.1016/j.apcata.2007.07.016
Publisher
Elsevier B.V.
Related Researcher
Files in This Item:
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Appears in Collections:
Division of Nanotechnology 1. Journal Articles
Division of Biomedical Technology 1. Journal Articles

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