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Augugliaro, Vincenzo,Loddo, Vittorio,Lopez-Munoz, Maria Jose,Marquez-Alvarez, Carlos,Palmisano, Giovanni,Palmisano, Leonardo,Yurdakal, Sedat Korean Society of Photoscience 2009 Photochemical & photobiological sciences Vol.8 No.5
$TiO_2$ catalysts of anatase, rutile and brookite phase were prepared at low temperature and tested for carrying out the photocatalytic partial oxidation of 4-methoxybenzyl alcohol to 4-methoxybenzaldehyde (p-anisaldehyde) in organic-free water suspensions. Traces of 4-methoxybenzoic acid and open-ring products were the only by-products present, $CO_2$ being the other main oxidation product. Rutile exhibited the highest yield to p-anisaldehyde (62% mol) at a rate of the same order of magnitude of that showed by the other samples. Commercial rutile and anatase photocatalysts were also used for the sake of comparison. The samples have been characterised by an in situ ATR-FTIR investigation carried out in conditions simulating the photoreaction ones.
A facile way to synthesize noble metal free TiO2 based catalysts for glycerol photoreforming
Claudio M. Pecoraro,Marianna Bellardita,Vittorio Loddo,Francesco Di Franco,Leonardo Palmisano,Monica Santamaria 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.118 No.-
In this work anaerobic heterogeneous photocatalytic solar/UV light reforming of glycerol in aqueousmedia was performed with Pt-photodeposition and noble metal free modified TiO2 photocatalysts preparedthrough ball milling, a very simple and cheap coupled catalyst preparation method. Differentamounts of Cu2O or 3% CuO were loaded on TiO2 using ball milling and during each run glycerol conversion,hydrogen and CO2 formed in the gas phase and 1,3-dihydroxyacetone (DHA) and glyceraldehyde(GA) in the liquid phase were determined. The results were compared with the aim to verify the effectivenessof Cu2O in replacing Pt. Using noble metal free photocatalysts, 33% glycerol conversion, 10.3%and 5.4% selectivity towards DHA and GA, respectively, a CO2 concentration of 0.16 mM, and a H2 concentrationof 1.01 mM corresponding to 0.17 mmol h1 g1 were obtained. Ex situ photoelectrochemicalcharacterization confirmed the formation of a heterostructure between TiO2 and copper oxide and theeffectiveness of Cu2O towards H2 formation.