A facile biogenic-mediated synthesis of Ag nanoparticles over anchored ZnO for enhanced photocatalytic degradation of organic dyes

Visible Light Photocatalytic Degradation of Methylene Blue Dye and Pharmaceutical Wastes over Ternary NiO/Ag/TiO2 Heterojunction

“…Bare NiO is a cost-effective and less toxic photocatalyst with high activity, stability, and strong degradation efficiency toward organic contamination . Ag supported on NiO shows excellent photodegradation efficiency toward cationic (methyl violet) and anionic (methyl orange) dyes at room temperature . NiO is a p-type semiconductor with high mobility of charge carriers and is well-known to form an effective p-n heterojunction with n-type metal oxides such as TiO 2 will, forming Ti 3+ /O v in the Fermi level in the band gap of TiO 2, resulting in a substantial enhancement in the separation efficiency of charge carriers …”

“…28 Ag supported on NiO shows excellent photodegradation efficiency toward cationic (methyl violet) and anionic (methyl orange) dyes at room temperature. 29 NiO is a p-type semiconductor with high mobility of charge carriers and is well-known to form an effective p-n heterojunction with n-type metal oxides such as TiO 2 will, forming Ti 3+ /O v in the Fermi level in the band gap of TiO 2, resulting in a substantial enhancement in the separation efficiency of charge carriers. 30 Recent research articles focused on synthesizing highly active and green ternary nanocomposite photocatalysts for water contamination remediation and environmental application.…”

Sustainable and energy-efficient photocatalytic degradation of textile dye assisted by ecofriendly synthesized silver nanoparticles

“…Hence, the oxygen photoreduction rate can be developed by these electrons and increase the quantity of photogenerated OH radicals 22 . Therefore, noble metal doping of semiconductor composites results in more operative photocatalysts 23 .Silver nanomaterials are considered an excellent candidate among noble metals due to their rather low cost, great surface area to volume ratio, excessive electrical conductivity, optical and catalytic properties, nontoxicity, antimicrobial effect, and various applications in the field of health and the environment.The presence of silver nanomaterials in contact with TiO 2 and/or ZnO usually enhances the rate of the photodegradation process in an aqueous medium under ultraviolet irradiation [24][25][26] , which can be attributed to the synergism between TiO 2 /ZnO and silver loading heterojunctions [27][28][29][30] .Recently, there has been a rise in interest in the "green" method of nanoparticle synthesis due to the fact that it is both cost-effective and environmentally friendly. The use of biopolymers in nanomaterial synthesis is gaining attention as a promising approach to achieving sustainability in the field of green nanotechnology [31][32][33] .…”

“…The presence of silver nanomaterials in contact with TiO 2 and/or ZnO usually enhances the rate of the photodegradation process in an aqueous medium under ultraviolet irradiation [24][25][26] , which can be attributed to the synergism between TiO 2 /ZnO and silver loading heterojunctions [27][28][29][30] .…”