Effect of Copper Substitution, Calcination Temperature, and Photo-sensitizers on Photocatalytic Activity of Cu0.05 Zn0.95O

Abstract

A successful series of CuxZn1-xO (variable x = 0.05, 0.1, 0.15 and 0.2) were characterized by thermogravimetric (TG-DTA), Fourier Transform Infra-Red (FTIR) spectroscopy, and X-ray Diffraction (XRD) techniques. The photocatalytic activity of prepared samples was accurately assessed by the photocatalytic decomposition of LASER dye in an aqueous solution under irradiation of solar light and was compared favourably to non-dope commercially available ZnO photo-catalyst. The effect of various parameters like the amount of a catalyst, the calcination temperature on photocatalytic activity is also studied. The direct effect of various photosensitizing salts like NaCl, Na2CO3, and Na2S2O3 on photocatalytic activity of ZnO and Cu0.05Zn0.95O was carefully studied.

Polyol-mediated zinc oxide nanoparticles using the refluxing method as an efficient photocatalytic and antimicrobial agent

“…Reactive (O 2 .- ) radical anions are formed when O 2 is reduced with an e - . Due to this reaction, other oxidizing species, such as and H 2 O 2 , are generated ( Vaseem et al, 2010 ; Soni et al, 2018 ). The reactions that create extra OH .…”

“…Due to this reaction, other oxidizing species, such as HO 2 . and H 2 O 2 , are generated (Vaseem et al, 2010;Soni et al, 2018). The reactions that create extra OH .…”

“…This makes them a promising alternative to traditional antibiotics, which can lead to the development of antibiotic-resistant strains of bacteria ( Shi et al, 2014 ). The current study will cover the synthesis of polyol-mediated ZnO NPs using the refluxing method, its characterization and photocatalytic activity of dye Rhodamine-B, and antibacterial and antifungal activities ( Vaseem et al, 2010 ; Rahman et al, 2013 ; Wan et al, 2013 ; Shi et al, 2014 ; Sirelkhatim et al, 2015 ; Wojnarowicz et al, 2016 ; Soni et al, 2018 ; Roy et al, 2021 ; Roy et al, 2022b ). The use of polyol-mediated ZnO nanoparticles in wastewater treatment shows great promise for developing efficient and sustainable methods for removing contaminants and disinfection of wastewater.…”

Polyol Synthesis of Ag-Doped Copper Oxide Nanoparticles as a Methylene Blue-Degrading Agent

“…The photocatalytic dye degradation mechanism is shown below. Charge initiation process: Photocatalytic dye degradation steps [1] which are responsible for the photocatalytic activity of the material. The excited electrons (e − ) in the CB can participate in redox reactions with the adsorbed dye molecules, while the holes (h + ) in the VB can react with the hydroxyl ions (OH − ) to produce highly reactive hydroxyl radicals ( • OH) that can oxidize the dye molecules (Figure 6).…”

“…Environmental pollution is an issue that affects both developed and developing nations alike, and it stems from a variety of sources, including the overuse of natural resources, synthetic organic products, inadequate regulations, and a lack of environmental awareness [1]. While several scientific studies have focused on developing novel synthesis methods and adopting eco-friendly practices in recent years [2], industrial processes still generate various goods, by-products, and other materials using inputs such as raw materials, water, light, and energy [3].…”