Manganese-Doped Zinc Oxide Nanostructures as Potential Scaffold for Photocatalytic and Fluorescence Sensing Applications

Abstract

Herein, we report the photocatalytic and fluorescence sensing applications of manganese-doped zinc oxide nanostructures synthesized by a solution combustion technique, using zinc nitrate as an oxidizer and urea as a fuel. The synthesized Mn-doped ZnO nanostructures have been analyzed in terms of their surface morphology, phase composition, elemental analysis, and optical properties with the help of scanning electron microscopy (SEM), X-ray diffraction (XRD), energy-dispersive X-ray spectroscopy (EDS), and UV-Visible (UV-Vis) spectroscopy. A careful observation of the SEM micrograph reveals that the synthesized material was porous and grown in very high density. Due to a well-defined porous structure, the Mn-doped ZnO nanostructures can be used for the detection of ciprofloxacin, which was found to exhibit a significantly low limit of detection (LOD) value i.e., 10.05 µM. The synthesized Mn-doped ZnO nanostructures have been further analyzed for interfering studies, which reveals that the synthesized sensor material possesses very good selectivity toward ciprofloxacin, as it detects selectively even in the presence of other molecules. The synthesized Mn-doped ZnO nanostructures have been further analyzed for the photodegradation of methyl orange (MO) dye. The experimental results reveal that Mn-doped ZnO behaves as an efficient photocatalyst. The 85% degradation of MO has been achieved in 75 min using 0.15 g of Mn-doped ZnO nanostructures. The observed results clearly confirmed that the synthesized Mn-dopedZnO nanostructures are a potential scaffold for the fabrication of sensitive and robust chemical sensors as well as an efficient photocatalyst.

Silver decorated 2D nanosheets of GO and MoS2 serve as nanocatalyst for water treatment and antimicrobial applications as ascertained with molecular docking evaluation

“…In 1971, the world health organization (WHO) detailed the deleterious effects of many pollutants on drinking water. Some regions of the world suffer from such harmful effects due to contaminated water through organic or inorganic dyes, heavy metal ions, etc [7,8]. Organic dyes such as phenol, MB or RhB, and heavy metal ions i.e.…”

Effect of calcination temperature on phase composition and optical properties of Al-ZnO nanocrystalline films

“…Thus, the introduction of aluminum ions makes it possible to obtain thin transparent conductive materials used in various fields of industry. In particular, they are used in the creation of electrodes [7,8], light-emitting diodes [9], solar cells [6,10], for medical purposes [11] and gas-sensitive sensors [12,13].…”

Microwave-Assisted Green Synthesis of Pure and Mn-Doped ZnO Nanocomposites: In Vitro Antibacterial Assay and Photodegradation of Methylene Blue

“…Another advantage of utilizing manganese as a dopant metal is its effectiveness in enhancing thermal, optical, and photocatalytic character without affecting the basic hexagonal structure of zinc oxide. It is worth mentioning that, despite the importance of the magnetic properties of manganese doping, few reports dealing with the photocatalytic and antibacterial studies of manganese-doped zinc oxide nanoparticles are available (Lee et al, 2016;Thakur et al, 2020;Biswas et al, 2021).…”