Sonochemical preparation and characterization of Sm-doped GO/KSrPO 4 nanocomposite photocatalyst for degradation of methylene blue dye.

Autor: Bajpai JS; Department of Chemical Engineering, Laxminarayan Institute of Technology, Rashtrasant Tukadoji Maharaj Nagpur University, Nagpur, India., Barai DP; Department of Chemical Engineering, Laxminarayan Institute of Technology, Rashtrasant Tukadoji Maharaj Nagpur University, Nagpur, India., Bhanvase BA; Department of Chemical Engineering, Laxminarayan Institute of Technology, Rashtrasant Tukadoji Maharaj Nagpur University, Nagpur, India., Pawade VB; Department of Applied Physics, Laxminarayan Institute of Technology, Rashtrasant Tukadoji Maharaj Nagpur University, Nagpur, India.
Jazyk: angličtina
Zdroj: Water environment research : a research publication of the Water Environment Federation [Water Environ Res] 2022 Jan; Vol. 94 (1), pp. e1682.
DOI: 10.1002/wer.1682
Abstrakt: The present work pertains to synthesis of Sm-doped GO/KSrPO 4 (GO/KSrPO 4 :Sm) nanocomposite using ultrasound-assisted method. Successful decoration of graphene oxide sheets with the KSrPO 4 :Sm 3+ phosphor was confirmed using analysis techniques including SEM, EDS, UV/visible spectrometry, XRD, and FTIR of the prepared GO/KSrPO 4 :Sm nanocomposite. Further, photocatalytic activity of this nanocomposite material was studied by examining degradation of methylene blue (MB) dye from water. The effects of several parameters like concentration of Sm 3+ in KSrPO 4 :Sm 3+ phosphor within the GO/KSrPO 4 :Sm nanocomposite photocatalyst, photocatalyst loading, initial dye concentration, pH, and preparation method were evaluated. At a higher concentration of Sm 3+ in the photocatalyst (1 mol.%), higher photocatalyst loading (1.5 mg/ml), lesser dye concentration (20 mg/L), and higher pH (11.4), the GO/KSrPO 4 :Sm nanocomposite photocatalyst prepared using ultrasound-assisted method showed higher dye removal compared to other conditions. A maximum of 83.35% removal of MB dye was achieved by the use of ultrasonically prepared GO/KSrPO 4 :Sm nanocomposite photocatalyst having a concentration of 1 mol.% of Sm 3+ in the KSrPO 4 :Sm 3+ phosphor at a loading of 1.5 mg/ml, initial dye concentration of 20 mg/L, and a pH of 11.4. Rate constant for MB dye degradation using the GO/KSrPO4:Sm nanocomposite photocatalyst synthesized by ultrasonic-assisted method was found to be 0.0053 min -1 . PRACTITIONER POINTS: GO/KSrPO 4 :Sm nanocomposite photocatalyst prepared by ultrasonic-assisted method. Higher Sm 3+ doping in nanocomposite with the use of ultrasound assisted method showed better performance of photocatalyst. A maximum removal of 83.35% of methylene blue dye was achieved.
(© 2021 Water Environment Federation.)
Databáze: MEDLINE
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