Unraveling the Role of CuO in CuO/TiO Photocatalyst for the Direct Propylene Epoxidation With O in a Fluidized Bed Reactor.

Propylene epoxidation in mild conditions using molecular O is a highly desirable reaction that represents a significant challenge in the field of heterogeneous catalysis for the synthesis of oxygenated organic compounds of industrial interest. In this work, CuO/TiO composites with different mominal CuO loadings (in the range of 0.5-8.

Solar Light Elimination of Bacteria, Yeast and Organic Pollutants by Effective Photocatalysts Based on Ag/Cr-TiO and Pd/Cr-TiO.

This study focused on searching for more effective nanomaterials for environmental remediation and health protection; thus, coliform bacteria, yeast and the organic food dye sunset yellow were selected as target pollutants to be eliminated under solar light by Ag/Cr-TiO and Pd/Cr-TiO. Firstly, Cr was in situ incorporated into the anatase crystalline lattice by the sol-gel method; then, Ag or Pd nanoparticles were deposited on Cr-TiO by chemical photoreduction. The scientific challenge addressed by the development of these composites was to analyse the recovery of Cr, to be employed in photocatalyst formulation and the enhancement of the TiO photocatalytic activity by addition of other noble metals.

Characterization and Photocatalytic and Antibacterial Properties of Ag- and TiO-Based (x = 2, 3) Composite Nanomaterials under UV Irradiation.

Metal and metal oxide nanostructured materials have been chemically and physically characterized and tested concerning methylene blue (MB) photoremoval and UV antibacterial activity against and . In detail, silver nanoparticles and commercial BaTiO nanoparticles were modified to obtain nanocomposites through sonicated sol-gel TiO synthesis and the photodeposition of Ag nanoparticles, respectively. The characterization results of pristine nanomaterials and synthetized photocatalysts revealed significant differences in specific surface area (SSA), the presence of impurities in commercial Ag nanoparticles, an anatase phase with brookite traces for TiO-based nanomaterials, and a mixed cubic-tetragonal phase for BaTiO.

The beneficial role of nano-sized FeO entrapped in ultra-stable Y zeolite for the complete mineralization of phenol by heterogeneous photo-Fenton under solar light.

Highly efficient, separable, and stable magnetic iron-based-photocatalysts produced from ultra-stable Y (USY) zeolite were applied, for the first time, to the photo-Fenton removal of phenol under solar light. USY Zeolite with a Si/Al molar ratio of 385 was impregnated under vacuum with an aqueous solution of Fe ions and thermally treated (500-750 °C) in a reducing atmosphere. Three catalysts, Fe-USY500°C-2h, Fe-USY600°C-2h and Fe-USY750°C-2h, containing different amounts of reduced iron species entrapped in the zeolitic matrix, were obtained.

Ag/Cr-TiO and Pd/Cr-TiO for Organic Dyes Elimination and Treatment of Polluted River Water in Presence of Visible Light.

In this work, photocatalytic materials constituted by Cr-doped TiO (Cr-TiO) decorated with noble metals show high effectiveness in the mineralization of Acid Orange 7 (AO7) and in the disinfection of real river water. The materials were firstly obtained by sol-gel method to get Cr-TiO that was subsequently modified by photochemical deposition of Ag or Pd nanoparticles (Ag/Cr-TiO, Pd/Cr-TiO). Chemical-physical characterization results evidenced that the noble metals were homogeneously distributed on the Cr-TiO surface.