In their pioneering work, Anpo et al. demonstrated that isolated tetrahedral TiOx species on silica are active photocatalysts for the formation of methane and methanol from CO2 and H2O. Recently, we developed a novel procedure for the introduction of isolated ZnOx sites into clean and titanate-loaded SBA-15. In presence of zinc oxide, the adsorption capacity towards CO2 was greatly improved. In the present contribution, it is shown that Au nanoparticles can be efficiently photo-deposited on TiOx/SBA-15. The formation of hydrogen is observed during the photodeposition process. In presence of zinc oxide, the photodeposited gold particles are of smaller size. In our new high purity gas phase photoreactor, we demonstrated that the materials are active for the photocatalytic reduction of CO2 to small hydrocarbons. Gold increases photocatalytic activity, especially towards the formation of methane. It was excluded that impurities in the gases or the samples were the source of the hydrocarbons.

Photocatalytic CO<sub>2</sub> reduction on gold-photodeposited titanate- and zinc oxide-grafted SBA-15

245th National Meeting (2013)

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Photocatalytic CO2 reduction on gold-photodeposited titanate- and zinc oxide-grafted SBA-15

Photocatalytic CO₂ reduction on gold-photodeposited titanate- and zinc oxide-grafted SBA-15