COBALT PHTHALOCYANINE DERIVATIVES SUPPORTED ON TIO2 BY SOL-GEL PROCESSING .1. PREPARATION AND MICROSTRUCTURE

Cobalt(II) 2,9,16,23-tetrasulphophthalocyanine and cobalt(II) 2,9,16,2 3-tetra(chlorosulphonyl)phthalocyanine were supported on TiO2 by react ion of the phthalocyanines with Ti(OR)(4) followed by sol-gel synthesi s. The thus obtained solid materials are stable in sulfide-containing media and are therefore suitable as catalysts for HS oxidation. The st ructure of the samples was characterized by electron microscopy and el ectron diffraction. The morphology of the matrix strongly depends on t he cobalt phthalocyanine derivative. The phthalocyanines in the titani a matrices are monomeric or dimeric depending both on the type of subs tituents of the CoPc derivative and on the titanium alkoxide used as p recursors.