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Immobilization of Tungsten Catalysts on Plasma Modified Membranes
Author(s) -
Lopez Linda C.,
Buonomenna Maria G.,
Fontananova Enrica,
Drioli Enrico,
Favia Pietro,
d'Agostino Riccardo
Publication year - 2007
Publication title -
plasma processes and polymers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.644
H-Index - 74
eISSN - 1612-8869
pISSN - 1612-8850
DOI - 10.1002/ppap.200600191
Subject(s) - catalysis , membrane , tungsten , tungstate , fluoride , phenol , chemistry , ion , plasma , inorganic chemistry , pollutant , degradation (telecommunications) , nuclear chemistry , chemical engineering , polymer chemistry , materials science , organic chemistry , telecommunications , biochemistry , physics , quantum mechanics , computer science , engineering
Novel catalytic membranes were developed by coupling low‐temperature plasma treatments with the chemical immobilization of W‐based catalysts. Poly(vinylidene fluoride) membranes were pre‐treated with Ar, and then treated with NH 3 radiofrequency glow discharges in order to obtain a surface rich in amino groups, which are suitable anchor sites for the immobilization of tungsten‐based heterogeneous catalysts. In particular, we have focused our interest on tungstate ions (WO 4 2− ), which catalyze the oxidation of secondary amines to nitrones, and on decatungstate (W 10 O 32 4− ) and phosphotungstate (W 12 PO 40 3− ) ions, which can both be used as catalysts for the degradation of organic pollutants such as phenol.