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Catalytically active heterogeneous catalysts have been prepared via microwave deposition of iron oxide nanoparticles (0.5–1.2wt%) on MCM-41 type silica materials with different morphologies (particles, helical and spheres). This methodology leads to iron oxide nanoparticles composed by a mixture of FeO and Fe 2 O 3 species, being the Fe(II)/Fe(III) peak ratio near to 1.11 by XPS. DRUV...
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