Barium titanate perovskite nanoparticles as a photoreactive medium for chemical warfare agent detoxification

Boosting the Photoactivity of Grafted Titania: Ultrasound‐Driven Synthesis of a Multi‐Phase Heterogeneous Nano‐Architected Photocatalyst

“…USprec outperformed various efficient nanostructures reported in literature, such as ultrasound-treated hydroxylated P25 (P25-US) and even its composite with reduced graphite oxide, BaTiO x (size ≈20 nm), ZnO 2 , and Zr(OH) 4 nanoparticles evaluated at the same conditions (Figure 5b). [11,36,54,55] Desorption tests revealed a superior adsorption strength of the toxic agent and the products of its decomposition on the USprec surface. After 1-and 7-day exposure to the toxic agents in the dark, the samples were subjected to ambient conditions for 48 h and 93 and 54% weight remained on USprec, respectively.…”

When sonochemistry meets heterogeneous photocatalysis: designing a sonophotoreactor towards sustainable selective oxidation

“…It is also possible that many nanoparticles remain aggregated during the magnetic stirring via polar interactions (Fig. 6b), [61][62][63] and these aggregations move as one chunk during magnetic stirring. This leads to the creation of interstitial phases/spaces, [64][65][66] where unselective reactions, like overoxidation, can take place, due to the presence of strongly adsorbed water moieties from the environmental humidity or/ and retention of the diluted oxygen.…”

Mechanochemical Forces as a Synthetic Tool for Zero- and One-Dimensional Titanium Oxide-Based Nano-photocatalysts

“…The increased porosity is also an important factor for photocatalytic application, since it enhances the reaction rates as a result of improved diffusion of the reactants and the availability of the active sites. For all studied samples, the obtained type IV nitrogen sorption isotherms with type H2 hysteresis loops revealed the existence of meso-pores/voids [91], resulted from the interstitial spaces between the nanoparticles, as was reported in various cases [80]. The lowest porosity values were found for the non-US-treated white powder; a surface area of 166.43 m 2 /g and total pore volume of 0.109 cm 3 /g.…”

“…Another important aspect in photocatalysis is the rate of the surface reactions. The structural (surface area and porosity) as well as the morphological features (shape and size) play a key role in the catalysis rates, and, as a result, the engineering of these features is also important [47, 69–80]. Toward the above-mentioned direction, different strategies/approaches were followed for the nano-engineering of the TiO 2 toward key features/properties for application in catalysis.…”