Photocatalytic transformation of chlorophenols under homogeneous and heterogeneous conditions using palladium octadodecylthio phthalocyanine
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Date
2011-11
Authors
Ogunbayo, T.B.
Nyokong, T.
Journal Title
Journal ISSN
Volume Title
Publisher
Journal of Molecular Catalysis A: Chemical(ELSEVIER)
Abstract
Homogeneous and heterogeneous photosensitized transformations of 4-chlorophenol (4-CP) and pentachlorophenol (PCP) using palladium octadodecylthiophthalocyanine (PdODPc) were investigated.
Under heterogeneous conditions, the photosensitizer was supported on functionalized single walled
carbon nanotubes (SWCNTs). Homogeneous photosensitization proved to be more effective than the
heterogeneous reaction in terms of percentage of transformation achieved. The kinetics of heterogeneous catalysis proved that ads-PdODPc–SWCNT–COOH (where SWCNT has been functionalized with
COOH groups) was reusable for 4-CP while its activity degenerated when reused for PCP. Singlet oxygen
was confirmed as playing an active role in the reactions.
Description
Keywords
Chlorophenols , Photosensitizers , Singlet oxygen quantum yield , Palladium phthalocyanine
Citation
Ogunbayo, Taofeek & Nyokong, Tebello. (2011). Photocatalytic transformation of chlorophenols under homogeneous and heterogeneous conditions using palladium octadodecylthio phthalocyanine. Journal of Molecular Catalysis A-chemical - J MOL CATAL A-CHEM. 350. 10.1016/j.molcata.2011.09.003.