Microwave plasma treated composites of Cu/Cu2O nanoparticles on electrospun poly(N-vinylpyrrolidone) fibers as highly effective photocatalysts for reduction of organic dyes and 4-nitrophenol

Electrodeposition of CoNi Cocatalyst to Enhance Ethanol Electrooxidation of Zn-doped Cu2O-Cu Photocatalyst

“…Previous studies showed that Zn-doped Cu2O has a good impact such as lattice shrinkage, band-gap adjustment, surface defects, increased photoelectrochemical properties, and suppressing recombination electron-hole [5][6][7][8][9][10][11][12][13][14]. On the other hand, copper metal and its oxide (Cu2O-Cu) have unique catalytic properties, high abundance, high thermal and electrical conductivity, low toxicity level, costeffective, and a small band gap energy with the range of 1.2-2.2 eV so that it efficiently acts on the visible region and absorbs more photon energy to induce redox reactions and promises for the conversion of solar power into electricity or chemical energy [15][16][17]. However, pure Cu2O has a low electrical power conversion efficiency of 2% [17].…”

“…In theory, Cu2O has a light-to-H2 (STH) efficiency at water electrolysis of 18% on the 1.5 AM spectrum for solar cells [18]. Cu2O is also limited by the light-induced recombination electron-hole pairs, poor durability, unstable in humid air and easily oxidizes to CuO [15,[20][21]. Therefore, in this study the Zn-doped composite Cu2O-Cu was developed to increase the electrooxidation activity of Published by The Center for Science Innovation ethanol with longer durability.…”

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

“…Being non‐toxic, most of the metal oxides do not harm humans as well as the environment and their recyclability is an economical advantage [4] . 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] .…”

“…[4] 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][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 + ).…”