article · Materials Research Express
Porous ternary metal oxide nanocomposites containing zinc, iron, and manganese were synthesised using poly(vinyl alcohol) supported sol-gel and self-propagation methods. Comprehensive physical, chemical, and electrochemical characterisation confirmed that the resulting materials possess a porous structure, a high surface area, and improved electrochemical behaviour. The nanocomposites were evaluated for their capacity to remove methylene blue dye from liquid solutions via adsorption. Key operational variables were investigated and optimised, including the dosage of the nanocomposite material, the pH of the solution, the contact time, and the initial dye concentration. Analysis using adsorption isotherm and kinetic modelling revealed that the dye removal proceeds through a chemisorption mechanism. These findings verify the functional capacity of these composite materials for dye pollutant remediation.
The release of organic dyes into waterways poses severe environmental and public health hazards. Adsorption is an effective method for removing such pollutants, but it requires materials with high surface areas and robust chemical properties. Demonstrating that poly(vinyl alcohol) supported ternary metal oxide nanocomposites successfully remediate methylene blue adds a promising new material option for developing advanced water decontamination technologies.
This work relates to industrial wastewater management, particularly for textile and dye manufacturing sectors seeking efficient effluent treatment solutions. Based strictly on the reported laboratory synthesis, characterisation, and parameter optimisation for methylene blue removal, the research is at an early experimental stage. Moving towards real-world adoption will require testing against complex industrial effluents, material regeneration studies, and scale-up assessments of the synthesis process.
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Abstract Adsorption is one of the noble techniques for remediation of organic and inorganic pollutants. The poly (vinyl alcohol) supported sol-gel and self-propagation routes have been used for the synthesis of porous ternary metal oxides nanocomposites. The optical, chemical bonding, crystallinity, morphological, textural, and electrochemical properties of the synthesized materials were characterized by DRS-UV–vis, FT-IR, XRD, SEM/EDX and TEM/HRTEM/SAED, BET, and CV/EIS techniques, respectively. The characterization of the nanocomposites confirmed their porous nature, high surface area, and better electrochemical properties. The synthesized nanomaterials were tested for the adsorption property of methylene blue dye. Important parameters such as the amount of PVA supported ternary metal oxide nanocomposite, pH of the solution, contact time, and concentration of methylene blue dye were optimized. For further understanding of the adsorption process, the adsorption isotherms and adsorption kinetics models were used. The adsorption tests revealed the presence of the chemisorption type of the adsorption process.
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DOI: 10.1088/2053-1591/ab94fc
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