Shape-Tailored TiO₂ Photocatalysts Obtained in the Presence of Different Types of Carbon Materials.

Titania and carbon materials are intensively studied in composite materials including photocatalytic applications. Both positive and negative effects were described in the literature, including charge separation, adsorption enhancement and short-circuiting of the photoelectrons as well. In the present study a more sparsely investigated properties of carbon materials will be highlighted, namely their role as crystallization promoters for titania, during hydrothermal synthesis of the composites.

Preparation, characterization, and testing of metal-doped carbon xerogels as catalyst for phenol CWAO.

Co-, Ce-, and Ni-doped carbon xerogels (Me-CX) synthesized by sol-gel method followed by an ion exchange process were used as catalysts for catalytic wet air oxidation (CWAO) of phenol. The prepared catalysts were characterized using TEM, SEM, BET surface area, and XRD. Me-CX catalysts were tested in mild conditions (20-60 °C, atmospheric pressure) in a semi-batch reactor in various reaction conditions (30-60 L/h, 0.

Photocatalytic, Morphological and Structural Properties of the TiO₂-SiO₂-Ag Porous Structures Based System.

TiO₂-SiO₂-based nanocomposites with highly porous structures are gaining ever increasing attention due to their specific properties and large variability of synthesis pathways together with wide information on the impact of the synthesis on the activity of the catalyst. This thereby offers an alternative approach to traditional/commercially available photocatalysts. In our work TiO₂-SiO₂ based aerogels were obtained and modified with various amount of Ag nanoparticles, using different synthesis pathways.