Photodegradation of methyl green using visible irradiation in ZnO suspensions. Determination of the reaction pathway and identification of intermediates by a high-performance liquid chromatography-photodiode array-electrospray ionization-mass spectrometry method

F. D. Mai, C. C. Chen, J. L. Chen, S. C. Liu

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76 Citations (Scopus)

Abstract

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, Na2CO3, H2O2, and Na2S2O8 - 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.

Original languageEnglish
Pages (from-to)355-365
Number of pages11
JournalJournal of Chromatography A
Volume1189
Issue number1-2
DOIs
Publication statusPublished - May 2 2008

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Methyl Green
Electrospray ionization
Electrospray Ionization Mass Spectrometry
Photolysis
Photodegradation
High performance liquid chromatography
Photodiodes
Mass spectrometry
Suspensions
Coloring Agents
High Pressure Liquid Chromatography
Irradiation
Degradation
Textiles
Waste Water
Wastewater
Technology
Light
Catalysts

Keywords

  • HPLC-ESI-DAD-MS
  • Methyl green
  • Photodegradation
  • ZnO

ASJC Scopus subject areas

  • Analytical Chemistry

Cite this

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abstract = "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, Na2CO3, H2O2, and Na2S2O8 - 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.",
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AU - Mai, F. D.

AU - Chen, C. C.

AU - Chen, J. L.

AU - Liu, S. C.

PY - 2008/5/2

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N2 - 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, Na2CO3, H2O2, and Na2S2O8 - 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.

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KW - Photodegradation

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