A comparison of photocatalytic activity of CuO, ZnO, and ZnO/CuO Nanocomposites for degrading water pollutants under LED light

Synthesis and Characterization of a Nano‐Composite CuO@Zn−2‐PTZ {Zn−2‐PTZ=bis[5‐(2‐pyridyltetrazolato)]diaquazinc(II)} for Efficient Photo‐catalytic Degradation of Methylene Blue (MB), Methyl Orange (MO) and mixed(MB‐MO)Dyes in Sunlight

“…Nano‐dimensional copper oxide (NPs) being a p‐type semiconductor with a narrow band gap energy (1.2 to 2.3 eV), is an effective photo‐catalyst for mineralization of several dyesunder visible light irradiations [5–8] . Modified CuO NPs, for example, chitosan‐based CuO hybrid material (CS−CuO) and ZnO/CuO nano‐compositeshave been examined for photo‐catalytic degradations ofwater pollutants [9,10] . Nano‐composites based on several combinations of oxides and sulphides of Cu 2+ , Zn 2+ and Cd 2+ as photo‐catalytic materials have been examined fordegradations of the organic dyes wherein formations of p‐n heterogeneous structures allowed efficient generation and separation of photo‐generated electrons and holes(e − /h + ) [11–16] .…”

“…[5][6][7][8] Modified CuO NPs, for example, chitosan-based CuO hybrid material (CSÀ CuO) and ZnO/CuO nano-compositeshave been examined for photo-catalytic degradations ofwater pollutants. [9,10] Nano-composites based on several combinations of oxides and sulphides of Cu 2 + , Zn 2 + and Cd 2 + as photo-catalytic materials have been examined fordegradations of the organic dyes wherein formations of p-n heterogeneous structures allowed efficient generation and separation of photogenerated electrons and holes(e À /h + ). [11][12][13][14][15][16] For example, the availability of such active sites in Nd 2 Sn 2 O 7 /DFNS (Dendritic Fibrous Nanosilica) photo-catalyst led to the enhancement in activity.…”