The catalytic behavior of zinc oxide prepared from various precursors and by different methods

Total oxidation of toluene over calcined trimetallic hydrotalcites type catalysts

“…Up to 1000 • C, no further reduction of Mn 2+ was observed [23]. In other experiments performed with ZnO, partial reduction of zinc was observed, with a maximum at around 600 or 780 • C for two different samples, being the second one more crystalline than the first [32].…”

Photocatalytic degradation for methylene blue using zinc oxide prepared by codeposition and sol–gel methods

“…Zinc oxide nanoparticles can be prepared by various methods, such as, alkali precipitation [11][12][13], thermal decomposition [14], hydrothermal synthesis [3], organo-zinc hydrolysis [15], spray pyrolysis [16,17] and microwave irradiation [18,19], plasma heat-decomposing [20], etc. Composites of zinc oxide and silica nanoparticle could be formed through co-precipitation route; in this case, the zinc oxide could be coated on the silica nanoparticle surface.…”

Evaluation of the Photocatalytic Potential of TiO2 and ZnO Obtained by Different Wet Chemical Methods

“…These semiconductors present band gap suitable for such process, which allows for degrading of 100% of dyes in a short time 15,16 . However, several factors can interfere with the catalytic activity of these materials 17,18 , e.g., the method of synthesis 19 , the presence of surface contaminants [20][21][22] , particle shapes 23 , etc. Han et al 24 synthesized TiO 2 at low temperatures, by varying the pH and the ions present in the synthesis environment.…”