Photocatalytic degradation of metoprolol in water suspension of TiO2 nanopowders prepared using sol–gel route

Sol-gel synthesis of anatase nanopowders for efficient photocatalytic degradation of herbicide Clomazone in aqueous media

“…In all spectra dominant Raman modes can be assigned to the Raman active modes of the anatase crystalline phase [20]: ~146 cm -1 (E g ), 199 cm -1 (E g ), 399 cm -1 (B 1g ), 519 cm -1 (combination of A 1g and B 1g that cannot be resolved at room temperature) and 639 cm -1 (E g ). Similar position (~146 cm -1 ) and linewidth (~12 cm -1 ) of the most intensive E g anatase Raman mode for all investigated TiO 2 samples indicate that anatase crystallites in all powders have similar nanosizes and structure [10,17]. As can be seen from the inset of Fig.…”

“…The TiO 2 anatase phase was prepared by sol-gel technique using TiCl 4 as a starting material according to the procedure described in our previous paper [10,17]. For producing the nanopowders with developed specific surface area, solution of (NH 4 ) 2 SO 4 was used [12].…”

“…There are various processes for contaminated water treatment and the photodegradation in suspension with TiO 2 seems to be the promising one among them. Photocatalytic activity of TiO 2 catalyst can be influenced by many factors (content, crystallinity and stoichiometry of the anatase phase; particle size and microstrain; surface area, pore size distribution and shape; the amount of surface O-H groups and other surface properties [3,10]), but decisive factor for enhanced photocatalytic efficiency in degradation of different pollutants could not be the same. In our study we used the same duration of the UV irradiation as it has been done in the literature for the Clomazone in the present of TiO 2 catalyst, but our aqueous media was distilled water (not natural water as used before as we want to eliminate the influence of natural water to the process of photodegradation) [11].…”

Degradation characteristics of metoprolol during UV/chlorination reaction and a factorial design optimization

“…However, the transformation byproducts must be identified because the byproducts can be more toxic than the parent compounds [8,[14][15][16]. For these reasons, the optimization of MTP removal and the identification of byproducts are important when the selected process is applied in WTPs.…”

Adsorption and Photocatalytic Decomposition of theβ-Blocker Metoprolol in Aqueous Titanium Dioxide Suspensions: Kinetics, Intermediates, and Degradation Pathways

“…Titanium dioxide (TiO 2 ) Degussa P-25 (commercial catalyst ∼70% anatase, ∼30% rutile, surface area 50 ± 5.0 m 2 g −1 , and 300 m particle size [25]) was used as received. This TiO 2 is a photochemical stable material [6,26,27 1000W) and a tubular-horizontal photoreactor (0.084L illuminated volume) located at the axis of a parabolic mirror in the bottom of the Solarbox. The photon flux inside the photoreactor was evaluated by o-nitrobenzaldehyde actinometry [28,29], being 2.68 Einstein s −1 .…”