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

Cham Kim; Seok Joo Doh; Se Geun Lee; Sung Jun Lee; Ho Young Kim

doi:10.1016/j.apcata.2007.07.016

Visible-light absorptivity of a zincoxysulfide (ZnO_xS_1-x) composite semiconductor and its photocatalytic activities for degradation of organic pollutants under visible-light irradiation

Cham Kim, Seok Joo Doh, Se Geun Lee, Sung Jun Lee, Ho Young Kim

Daegu Gyeongbuk Institute of Science and Technology

Research output: Contribution to journal › Article › peer-review

80 Scopus citations

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 (ZnO_xS_1-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.

Original language	English
Pages (from-to)	127-133
Number of pages	7
Journal	Applied Catalysis A: General
Volume	330
Issue number	1-2
DOIs	https://doi.org/10.1016/j.apcata.2007.07.016
State	Published - 10 Oct 2007

Bibliographical note

Funding Information:
We specially thank Soonhyun Kim and Pil-Sang Yun for designing the photocatalytic reactor for the photolysis. The work described herein was financially supported by the DGIST Basic Research Program of the Ministry of Science and Technology (MoST) of Korea.

Keywords

Photocatalyst
Visible light
Zincoxysulfide (ZnOS)
ZnO
ZnS

Access to Document

10.1016/j.apcata.2007.07.016

Cite this

@article{cda57b3e44ba4366947beab3d8ccc942,

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

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.",

keywords = "Photocatalyst, Visible light, Zincoxysulfide (ZnOS), ZnO, ZnS",

author = "Cham Kim and Doh, {Seok Joo} and Lee, {Se Geun} and Lee, {Sung Jun} and Kim, {Ho Young}",

note = "Funding Information: We specially thank Soonhyun Kim and Pil-Sang Yun for designing the photocatalytic reactor for the photolysis. The work described herein was financially supported by the DGIST Basic Research Program of the Ministry of Science and Technology (MoST) of Korea.",

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Visible-light absorptivity of a zincoxysulfide (ZnO_xS_1-x) composite semiconductor and its photocatalytic activities for degradation of organic pollutants under visible-light irradiation. / Kim, Cham; Doh, Seok Joo; Lee, Se Geun et al.
In: Applied Catalysis A: General, Vol. 330, No. 1-2, 10.10.2007, p. 127-133.

Research output: Contribution to journal › Article › peer-review

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AU - Lee, Sung Jun

AU - Kim, Ho Young

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PY - 2007/10/10

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N2 - 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.

AB - 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.

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