Photodegradation of methyl green using visible irradiation in ZnO suspensions

Heterogeneous photocatalytic treatment of a dye called methyl green (MG), which was simulating textile wastewater from associated auxiliary chemicals, was investigated using ZnO. A detailed investigation of the photodegradation of MG has been carried out in the ZnO suspension irradiated with visible...

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Bibliographic Details
Published inJournal of Chromatography A Vol. 1189; no. 1; pp. 355 - 365
Main Authors Mai, F.D., Chen, C.C., Chen, J.L., Liu, S.C.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.05.2008
Amsterdam; New York: Elsevier
Subjects
HPLC–ESI-DAD-MS
Methyl green
Photodegradation
ZnO
Photodegradation
ZnO
Methyl green
HPLC–ESI-DAD-MS
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Summary:Heterogeneous photocatalytic treatment of a dye called methyl green (MG), which was simulating textile wastewater from associated auxiliary chemicals, was investigated using ZnO. A detailed investigation of the photodegradation of MG has been carried out in the ZnO suspension irradiated with visible light. The effects of various factors – viz. pH values, amount of catalyst, initial dye concentration, and the presence of NaCl, Na 2CO 3, H 2O 2, and Na 2S 2O 8 – on the degradation efficiency were studied. Thirty-two intermediates were separated, identified, and characterized by high-performance liquid chromatography–photodiode array-electrospray ionization-mass spectrometry (HPLC–ESI-DAD-MS) technology, giving us insight into the pathways of the degradation process.
Bibliography:http://dx.doi.org/10.1016/j.chroma.2008.01.027
ISSN:0021-9673
DOI:10.1016/j.chroma.2008.01.027