Preparation, photocatalytic properties and mechanism of Fe or N-doped Ag/ZnO nanocomposites

Fabrication, characterization and high photocatalytic activity of Ag–ZnO heterojunctions under UV-visible light

“…Surface hydroxyl group will generate superoxide radical ions (cOH), which can decompose MB molecules effectively. 40 However, in the present study, as discussed in BET and XPS sections, it was proven that the specic surface area and surface hydroxyl group content of ZnO remained almost unchanged aer Ag loading. The increased photocatalytic activity should be attributed to the suppression of the photogenerated electrons and holes by Ag loading, which is conrmed by PL spectra.…”

Enhanced properties for visible-light-driven photocatalysis of Ag nanoparticle modified Bi2MoO6 nanoplates

“…One of primary characteristics of the Schottky barrier is the Schottky barrier height (Φ), which is controlled by the metal-semiconductor couple. Further, the electrons were released to oxygen molecules adsorbed on the surface of Ag by transforming the oxygen molecules into superoxide anion radicals (O 2 À ) [42,43]. Concurrently, the photo-induced holes reacted with surface-bound H 2 O or OH À to form hydroxyl radical species (OH ) [41,42,44].…”

Preparation and characterisation of Ag modified rutile titanium dioxide and its photocatalytic activity under simulated solar light

“…As follows, the photogenerated electrons react with oxygen molecules and form free radicals such as •O 2− . On the other hand, the photogenerated holes in valence band react with OH − to produce hydroxyl radicals such as •OH [18]. The formed radicals have strong oxidising properties and decompose RhB molecules quickly.…”