Biogenic Synthesis of Cu‐Doped ZnO Photocatalyst for the Removal of Organic Dye

Abstract

The Cu-doped ZnO photocatalysts were prepared with a green and coprecipitation approach by using water hyacinth (Eichhornia crassipes) aquatic plant extract. In the preparation process, different amount of copper precursors such as 1, 2, 3, 4, and 5% of molar ratio were added to zinc nitrate precursors and abbreviated as Cu-ZnO (1%), Cu-ZnO (2%), Cu-ZnO (3%), Cu-ZnO (4%), and Cu-ZnO (5%), respectively. The characterization of the obtained samples was carried out, and the removal of the methylene blue (MB) dye was examined. Out of all catalysts, Cu-ZnO (3%) had the best photocatalytic performance and 89% of the MB dye was degraded. However, the degradation performances of blank (without catalysts), ZnO, Cu-ZnO (1%), Cu-ZnO (2%), Cu-ZnO (4%), and Cu-ZnO (5%) catalysts were 6, 54, 69, 83, 80, and 73%, respectively. Therefore, the use of water hyacinth plant extract with the optimum amount of Cu added to ZnO during the preparation of the catalyst could have a promising application in the degradation of organic pollutants.

ZnO Nanoparticles Synthesized using Aerial Extract of Ranunculus multifidus Plant: Antibacterial and Antioxidant Activity

“…Additionally, the enzymes in the aerial extract of the plant assist the metal ions to create an enzyme-substrate complex, which results in the production of zinc with a protein cap [21], and it is known that the phenolic chemicals serve as ligands, bind to metal ions, decrease, and cap those ions to create nanoparticles. A prior study had also claimed that these ligands also function as regulators of particle size [21,22]. The great propensity of phenolic compounds to chelate metals is the main cause of their antioxidant function.…”

Experimental and computational study of metal oxide nanoparticles for the photocatalytic degradation of organic pollutants: a review

“…It is also possible to control the particle size and crystal structure by varying media pH and, at times, large amounts of nanoparticles can be prepared using the coprecipitation method. 62 Various metal oxide nanoparticles such as MnO 2 , 63 ZnO, 64 MgO, 65 BiVO 4 , 66 Nidoped SnO 2 , 67 N-and Fe-doped TiO 2 , 68 CuO, 69 Cu-doped ZnO, 70 PbWO 4 , 71 etc., were synthesized using the coprecipitation method. Kotresh et al 64 synthesized ZnO nanoparticles via the coprecipitation process at 50 °C and 70 °C reaction temperatures using sodium hydroxide as the precipitating media and zinc nitrate hexahydrate as the Zn 2+ precursor.…”

“…It is also possible to control the particle size and crystal structure by varying media pH and, at times, large amounts of nanoparticles can be prepared using the coprecipitation method. 62 Various metal oxide nanoparticles such as MnO 2 , 63 ZnO, 64 MgO, 65 BiVO 4 , 66 Ni-doped SnO 2 , 67 N- and Fe-doped TiO 2 , 68 CuO, 69 Cu-doped ZnO, 70 PbWO 4 , 71 etc. , were synthesized using the coprecipitation method.…”

Synthesis, Characterization, and Photocatalytic Activity of Cu-Doped MgO Nanoparticles on Degradation of Methyl Orange (MO)

“…Metal oxide nanoparticles can be synthesized by condensation, evaporation, sol-gel, precipitation, coprecipitation, and green methods [13]. Among theme, green synthesis has recently been of great interest to produce metal oxide nanoparticles such as ZnO, MnO 2 , MgO, and TiO 2 [14].…”