Facile synthesis of highly uniform ZnO multipods as the supports of Au and Ag nanoparticles

Ag-doped ZnO nanorods coated metal wire meshes as hierarchical photocatalysts with high visible-light driven photoactivity and photostability

“…The photocatalytic efficiency will decrease if the electron-hole pairs cannot be separated effectively. Electric conductive substrates such as indium tin oxide and copper plates [39,40] play an active role in the catalytic process by favoring separation of photogenerated electron-hole pairs. In this study, the conductive stainless-steel wire mesh has two functions in the catalytic process.…”

Nanostructured ZnO Materials: Synthesis, Properties and Applications

“…With this general approach, nano-and microparticles, multipods, wires, and rods have been reported in the literature [38,40] (Fig. 5.3).…”

“…The liquid phase synthesis or sol-gel method can be divided in three main families: -Solution growth [38,39], leading to nano-or micro-sized powders or colloids -Hydrothermal or aqueous chemical growth [31,34], thus leading to the anisotropic growth of vertically oriented nanowires on a substrate -Template-based growth [28], using a porous matrix where the nanostructure growth takes place, filling the porosities of the template Solution Growth: Sol-gel Hydrolysis and Condensation Method Mono-or polycrystalline materials in the final form of powders or colloids can be easily obtained with this sol-gel approach [38,40]. First the Zn-precursor hydrolyzes in a solvent (generally water or alcohols) forming Zn 2+ ions which react with the OH-anions of a base present in the reaction mixture (generally sodium hydroxide, NaOH, or potassium hydroxide, KOH), to form different hydroxyl species [41] …”

Synthesis and Characterization of ZnO-Ag Nanoparticles Supported on MCM-41 as Photocatalyst

“…Hence, there are sites available accommodating higher doping concentration limits in the host lattice 6 . The presence of Ag improves its photocatalytic properties 7,8 , by promoting interfacial electron-hole spacing 9 and the Ag addition may trap photogenerated electrons 10 .…”