Manganese-doped Zinc Oxide Nanopowders for Photocatalytic Decoloration of Reactive Black 5 Textile Dye

Abstract

Zinc oxide photocatalysts doped with manganese (0.04-1 at.%) were synthesized via precipitation technique. Their characteristics were studied by Xray diffraction (XRD) and BET analysis. The calculated mean size of the crystallites was in the range of 31-45 nm. Manganese doping of ZnO samples results in slight decrease in crystalline size. Increasing the Mn content in ZnO powders results in a lower photocatalytic activity. The pure ZnO nanopowders decolorate Reactive Black 5 dye under ultraviolet light to almost 92% for 2 h.

Thickness effect on the bipolar switching mechanism for nonvolatile resistive memory devices based on CeO2 thin films

“…[14]. Antisymmetric and symmetric stretching vibrational modes of Ce-O-Ce bonds are noted at 1050 and 650 cm À 1 , respectively [15]. From these FTIR spectra, it can be confirmed that Ti is bonded with oxygen in our cerium oxide based devices, which supports the XRD results ( Fig.…”

Sorption‐oxidation mechanism for the removal of arsenic (III) using Cu‐doped ZnO in an alkaline medium

“…The photoefficiency of ZnO can be enhanced by doping with transition metal ions, increasing the available surface area and controlling its own defectiveness. Copper is an effective acceptor impurity that affects the electronic band structure and the native point defects of ZnO (Milenova et al, 2015). It is known that Zn 1‐x Cu x O solid solutions have an extended range of photo‐ and antibacterial activity (Kang et al, 2021; Okeke et al, 2020; Tsogoo et al, 2023).…”