Novel PVA/chitosan composite membrane modified using bio-fabricated α-MnO 2 nanoparticles for photocatalytic degradation of cationic dyes.

Autor: Srivastava V; Department of Sciences and Humanities, Rajiv Gandhi Institute of Petroleum Technology, Amethi, Uttar Pradesh, 229304, India. pc16001@rgipt.ac.in., Choubey AK; Department of Sciences and Humanities, Rajiv Gandhi Institute of Petroleum Technology, Amethi, Uttar Pradesh, 229304, India.
Jazyk: angličtina
Zdroj: Environmental science and pollution research international [Environ Sci Pollut Res Int] 2023 Mar; Vol. 30 (13), pp. 35838-35852. Date of Electronic Publication: 2022 Dec 20.
DOI: 10.1007/s11356-022-24634-w
Abstrakt: By integrating the benefits of poly vinyl alcohol (PVA) and chitosan (CS) with α-MnO 2 nanoparticles (MNPs), a novel type of nano-polymer composite (PVA/CS-MNP) membrane was synthesized through a simple and facile casting method. In this proposed work, the membrane prepared was used for removal of organic textile dyes from their aqueous solutions. The as-synthesized PVA/CS-MNP membrane was examined using different analytical techniques such as Fourier transform infrared spectroscopy (FTIR) and field emission scanning electron microscopy (FESEM), and mechanical properties of material was also studied. Two cationic dyes, methylene blue (MB) and eosin yellow (EY), were chosen as template dyes to be removed from industrial waste water. These dyes were degraded by carrying out a reaction in which the synthesized membrane was used as a photocatalyst. The study of kinetics revealed that the reaction process followed pseudo-first-order kinetics. The efficiency of catalyst and the rate of reaction were also examined by varying parameters such as pH, initial concentration of dyes, and composition of membrane. The maximum efficiency of catalyst was observed at pH 12 as more than 95% of dyes degraded within 1 h of time span. The catalyst was found to be reusable as its efficiency did not deteriorate even after using it for several times. Such functional membrane having higher stability, low production cost, excellent efficiency to degrade dyes, and good recyclability are promising material for distinctly effective deletion of organic dyes from waste water.
(© 2022. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.)
Databáze: MEDLINE
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