Macroporous TiO2 scaffolds as support for heterogeneous Fenton-Type catalysts.

LUCILA DOUMIC; MICAELA GENOVA; MIRYAN C. CASSANELLO; PATRICIA M. HAURE; RODRIGO PARRA; HERNAN ROMEO; M. ALEJANDRA AYUDE

Conferencia; 3rd Iberoamerican Conference of Advanced Oxidation Technologies (III CIPOA) 2nd Colombian Conference on Advanced Oxidation Processes (II CCPAOX); 2017

The feasibility for intensifying heterogeneous Fenton-type (HFT) catalysts is explored through the use of tailored supports to provide enhanced dispersion and utilization of active sites. Synthesis of Prussian Blue (PB) NPs, dispersed on highly structured TiO2 (rutile) scaffolds, is presented, along with their characterization and evaluation in the HFT oxidation of Orange G. Catalytic experiments were conducted in a thermostated recycle fixed bed reactor under darkness conditions. From liquid flow rates of 11.5 ml/min and on, external mass transport resistances are not significant. Under the studied operating conditions, the PB NPs clearly promote H2O2 decomposition and colour removal. OG adsorption on support and catalyst can be considered negligible. Neither H2O2 decomposition nor colour removal is affected by TiO2 support. No significant morphology differences between the fresh and the used catalysts were appreciated.