Fabrication of CuO/ZnO composite films with cathodic co-electrodeposition and their photocatalytic performance

Enhanced photocatalytic activity of ZnO/CuO nanocomposite for the degradation of textile dye on visible light illumination

“…It is known that the photocatalytic redox reaction mainly takes place on the surface of the photocatalysts, so the surface properties significantly influence the efficiency of photocatalysts. Few research groups have used ZnO/CuO for the degradation of various dyes (RhB, Acid red88, Cr(VI), Acid Orange 7 and Methyl Orange) in the recent past under UV and visible light irradiation [15,33,[42][43][44][45]. Among them, two research groups have explained the degradation of methyl orange under visible light.…”

Improvement of TiO2 photocatalytic properties under visible light by WO3/TiO2 and MoO3/TiO2 composites

“…superoxide radical (O ·) and a hydrogen peroxide (H 2 O 2 ), which can interact to produce a powerful oxidant (hydroxyl radical ·OH) to decompose RhB. While the holes accumulated in the TiO 2 VB take part in the oxidation process to make OH − or H 2 O species to produce reactive hydroxyl radicals [46][47][48]. It is the process that makes the charge carriers separate more efficient, which is one of the most significant factors that decide the photocatalytic activity.…”

Formation of polar surfaces in microstructured ZnO by doping with Cu and applications in photocatalysis using visible light

“…The energy levels of these two catalysts are suitable for effective transfer and separation of electronehole pairs, as shown in schematic 2A. The mechanism for photocatalysis is as follows[66,67]:Fig. 12.…”