Photocatalysis with Organized Systems for the Oxofunctionalization of Hydrocarbons by O₂

Ag/AgBr/TiO2 Visible Light Photocatalyst for Destruction of Azodyes and Bacteria

“…The evidence that • OH and O 2 -• are produced on the surface of visible illuminated Ag/AgBr/TiO 2 provides a solid indication that the catalyst can be efficiently excited by visible light to create electron-hole pairs and that the charge separation is maintained long enough to react with adsorbed oxygen/H 2 O and to produce a series of active oxygen radicals which finally decompose organic compounds as illustrated in previous work. 32 indicating no reactive oxygen species generated from visible light excited plasmon resonance of Ag 0 metals on TiO 2 , although Ag/TiO 2 has a strong absorption in the visible region. On the basis of all the information about reactive oxygen determination, we may deduce that, in the visible light illuminated Ag/AgBr/ TiO 2 system, the mechanism of dye degradation is the mainly visible light driven photocatalytic process.…”

Mild ultrasound-assisted synthesis of TiO 2 supported on magnetic nanocomposites for selective photo-oxidation of benzyl alcohol

“…7 Selective oxidation of alcohols to their corresponding carbonyl compounds (especially aldehydes) is one of the important organic transformations as carbonyl compounds are widely used in food, beverages, and pharmaceutical industries, and as precursors in chemical industries. 8,9 The conversion of aromatic alcohols to aldehydes is particularly attractive since aromatic alcohols represent themselves as model lignin compounds obtained after the depolymerization of lignin. The main purpose of studying these compounds is that they contain linkages that resemble those found in lignin and thus their reactivity could potentially provide insights into the degradation and reaction of the polymer structure as a whole.…”

PHOTOCATALYTIC DEGRADATION OF RESORCINOL OVER ZnO POWDER THE INFLUENCE OF PEROXOMONOSULPHATE AND PEROXODISULPHATE ON THE REACTION RATE

“…The hydroxyl (•OH) radical is a powerful oxidant for degrading non selective organic compounds [5][6]. The most frequently used photocatalysts are TiO 2 , ZnO, ZrO 2 , CdS, and SnO 2 [7][8]. Among these ZnO removed several environmental contaminants under UV irradiation [9][10][11][12].…”