Influence of alternating current electric field on the photocatalytic activity of Mo super(6+)-doped and Ag super(0)-loaded nano-TiO sub(2)

Influence of external applied electric field on the photocatalytic activity of Mo super(6+)-doped and Ag super(0)-loaded nano-TiO sub(2) (Mo super(6+)/Ag super(0)/TiO sub(2)) was studied by the degradation of methyl orange (MO). The degradation rate of MO by direct current (DC) electric field could...

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Published inJournal of alloys and compounds Vol. 587; pp. 511 - 514
Main Authors Zhang, Pengfei, Wu, XingKe, Zhao, Tianxiang, Hou, Peng, Wen, Lishi
Format Journal Article
LanguageEnglish
Published 25.02.2014
Subjects
Alternating current
Degradation
Electric fields
Electric potential
Nanostructure
Photocatalysis
Semiconductors
Voltage
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Summary:Influence of external applied electric field on the photocatalytic activity of Mo super(6+)-doped and Ag super(0)-loaded nano-TiO sub(2) (Mo super(6+)/Ag super(0)/TiO sub(2)) was studied by the degradation of methyl orange (MO). The degradation rate of MO by direct current (DC) electric field could be enhanced to some extent but not proportional to voltage, while the degradation rate of MO by alternating current (AC) electric field was obviously improved along with the increase of frequency. This shows not only the voltage but also the frequency of external electric field affect the photocatalytic activity of the composite catalyst. From the theories of semiconductor and quantum mechanics, the mechanism for AC electric field to promote the degradation of organic pollutant was discussed.
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ISSN:0925-8388
DOI:10.1016/j.jallcom.2013.10.135