Facile synthesis of magnetic Co3O4/BFO nanocomposite for effective reduction of nitrophenol isomers. (March 2019)

• Record Type: Journal Article
• Authors: Shi, Xuefeng; Quan, Shanyu; Yang, Linmei; Shi, Guimei; Shi, Fanian
• Is Part Of: Chemosphere. Volume 219(2019)
• Page Start: 914
• Page End: 922
• Publication Date: 2019-03
• Subjects: CO3O4 -- Bismuth ferrite -- Hydrothermal and impregnation -- Catalytic reduction -- Nitrophenol isomers; Pollution -- Periodicals; Pollution -- Physiological effect -- Periodicals; Environmental sciences -- Periodicals; Atmospheric chemistry -- Periodicals; 551.511
• DOI: 10.1016/j.chemosphere.2018.12.045
• Languages: English
• ISSNs: 0045-6535

Abstract

Abstract: Co3 O4 /BiFeO3 nanocomposite catalysts were synthesized by a facile hydrothermal method following the impregnation process. The nanocomposite was successfully characterized by powder X-ray diffraction(XRD), scanning electron microscopy (SEM), high resolution transmission electron microscopy (HRTEM), nitrogen adsorption desorption isotherms and X-ray photoelectron spectroscopic (XPS) analysis. The as-synthesized Co3 O4 /BiFeO3 nanocomposites were tested as a catalyst in the reduction of nitrophenol isomers with NaBH4 at room temperature. The results indicate that the as-prepared Co3 O4 /BiFeO3 nanocomposites are an efficient recyclable catalyst for the reduction of nitrophenol isomers. The reduction kinetics for all the reactions follows the pseudo-first order. The rate reduction of nitrophenols followed the order 3NP > 2NP > 4NP. Graphical abstract: The catalytic reduction of 2/3/4NP over the 8CO3 O4 -BFO catalyst with NaBH4 in aqueous solution. Image 1 Highlights: Co3O4 anchored on BiFeO3 by the impregnation method. Study of catalytic reduction of 2-, 3-, 4-nitrophenols. 8 wt% Co3O4-BiFeO3 exhibited highest catalytic reduction activity. Mechanism for the rate of reduction of 2-, 3-, 4-nitrophenols has been proposed.