Hydroxyl radical generation by cactus-like copper oxide nanoporous carbon catalysts for microcystin-LR environmental remediation

S. Karthikeyan, Dionysios D. Dionysiou, Adam F. Lee, S. Suvitha, P. Maharaja, Karen Wilson, G. Sekaran*

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

Copper oxide supported on nanoporous activated carbon (CuO-NPAC) is reported for the aqueous phase catalytic degradation of cyanotoxin microcystin-LR (MC-LR). The loading and spatial distribution of CuO throughout the NPAC matrix strongly influence the catalytic efficiency. CuO-NPAC synthesis was optimized with respect to the copper loading and thermal processing, and the physicochemical properties of the resulting materials were characterized by XRD, BET, TEM, SEM, EPR, TGA, XPS and FT-IR spectroscopy. EPR spin trapping and fluorescence spectroscopy showed in situ ˙OH formation via H2O2 over CuO-NPAC as the catalytically relevant oxidant. The impact of reaction conditions, notably CuO-NPAC loading, H2O2 concentration and solution pH, is discussed in relation to the reaction kinetics for MC-LR remediation.
Original languageEnglish
Pages (from-to)530-544
Number of pages15
JournalCatalysis Science and Technology
Volume6
Issue number2
Early online date11 Aug 2015
DOIs
Publication statusPublished - 2015

Bibliographical note

Funding: CSIR, India (31/6IJ365)/2012-EMR-I) for Senior Research Fellowship; SETCA network programme; University of Cincinnati; EPSRC (EP/G007594/4) for Leadership Fellowship; and Royal Society for an Industry Fellowship.

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