UV-Responsive Er-Doped NiAl2O4/Mn/GO Nanocomposites: Green Synthesis and Photocatalytic Degradation of Organic Pollutants via Fluorescent Behavior for Water Purification.
Seyed Ali Hosseini Moradi, Durgham Abdulsattar Oleiwi, Kamran Heydaryan, Sattar H Abed, Farzad Namvar
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引用次数: 0
Abstract
Synthetic dye-induced water pollution poses considerable environmental challenges, underscoring the urgent demand for novel and sustainable remediation strategies. In this context, the present study introduces an eco-friendly synthesis approach for Er-doped NiAl₂O₄/Mn/GO nanocomposites, employing rhubarb extract as a natural capping agent to enhance the process's sustainability. Various synthesis techniques, including microwave irradiation, co-precipitation, ultrasonic treatment, and hydrothermal processes, were rigorously investigated to determine their impact on the morphological features, physicochemical attributes, and fluorescence behavior of the resulting nanocomposites. Comprehensive characterization was performed using advanced analytical methods such as X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), Fourier-transform infrared spectroscopy (FTIR), and Brunauer-Emmett-Teller (BET) surface area analysis. The photophysical characteristics of the nanocomposites were investigated, emphasizing their fluorescence response under UV irradiation. A band gap value of 3.2 eV highlighted their promising photocatalytic activity under ultraviolet light exposure. The photocatalytic efficiency, assessed against Acid Black 1 dye, demonstrated effective degradation capabilities. Radical scavenger experiments utilizing p-benzoquinone, benzoic acid, and EDTA offered valuable insights into the underlying degradation mechanisms. The ultrasound-assisted synthesis technique exhibited superior photocatalytic efficiency, achieving a remarkable 94.59% degradation of dye within 60 min utilizing 40 mg of the nanocatalyst. These findings underscore the significant potential of Er-doped NiAl₂O₄/Mn/GO nanocomposites, characterized by their enhanced fluorescence properties, as efficient and sustainable photocatalysts for the effective elimination of organic pollutants from wastewater.
期刊介绍:
Journal of Fluorescence is an international forum for the publication of peer-reviewed original articles that advance the practice of this established spectroscopic technique. Topics covered include advances in theory/and or data analysis, studies of the photophysics of aromatic molecules, solvent, and environmental effects, development of stationary or time-resolved measurements, advances in fluorescence microscopy, imaging, photobleaching/recovery measurements, and/or phosphorescence for studies of cell biology, chemical biology and the advanced uses of fluorescence in flow cytometry/analysis, immunology, high throughput screening/drug discovery, DNA sequencing/arrays, genomics and proteomics. Typical applications might include studies of macromolecular dynamics and conformation, intracellular chemistry, and gene expression. The journal also publishes papers that describe the synthesis and characterization of new fluorophores, particularly those displaying unique sensitivities and/or optical properties. In addition to original articles, the Journal also publishes reviews, rapid communications, short communications, letters to the editor, topical news articles, and technical and design notes.