Construction of delaminated Ti3C2 MXene/NiFe2O4/V2O5 ternary composites for expeditious pollutant degradation and bactericidal property. Issue 5 (October 2022)

• Record Type: Journal Article
• Authors: Lam, Sze-Mun; Choong, Man-Kit; Sin, Jin-Chung; Zeng, Honghu; Huang, Liangliang; Hua, Lin; Li, Haixiang; Jaffari, Zeeshan Haider; Cho, Kyung Hwa
• Is Part Of: Journal of environmental chemical engineering. Volume 10:Issue 5(2022)
• Publication Date: 2022-10
• Subjects: MXene -- Photocatalysis -- Bactericidal -- Phototoxicity -- Visible light; Chemical engineering -- Environmental aspects -- Periodicals; Environmental engineering -- Periodicals; Chemical engineering -- Environmental aspects; Environmental engineering; Periodicals; 660.0286
• DOI: 10.1016/j.jece.2022.108284
• Languages: English
• ISSNs: 2213-2929

Abstract

Abstract: Increasing flux of toxic pollutants and harmful microbes ejected by the industrial effluents into water resources have been frightening the natural ecosystem over the years. Ergo, the present work aims to decompose Rhodamine B (RhB), Staphylococcus aureus ( S. aureus ) and Bacillus cereus ( B. cereus ) using a novel delaminated Ti3 C2 MXene/NiFe2 O4 /V2 O5 (D-M/NFO/VO) ternary composite. The construction of pristine materials and composites were testified by crystallography studies, while the morphological characteristics were ascertained by microscopy analyses. In comparison with V2 O5 and NiFe2 O4 /V2 O5, 0.5 wt% D-M/NFO/VO exhibited improved photoactivity, which decomposed 88.7% RhB, 72.8% S. aureus and 85.1% B. cereus after 240 min. As an outstanding co-catalyst, Ti3 C2 MXene can efficiently capture electron and prevented the charge carrier recombination in the composite. Meanwhile, the photocatalytic mechanism of the composite was tested via radical trapping analyses and electron spin resonance spectra, which verified that the hydroxyl and superoxide anion radicals served as the pivotal roles for photodegradation of RhB dye. The real-world viability of D-M/NFO/VO photocatalytic system was also examined using the real printed ink wastewater-containing RhB. The phytotoxic effects of real printed ink wastewater-containing RhB toward the germination seeds of Vigna radiata and Vigna unguiculata were significantly decreased after D-M/NFO/VO photocatalysis. This work puts forward for the use of visible light-assisted catalysts toward ameliorating and eradicating the existing multifarious environmental damages. Graphical Abstract: ga1 Highlights: A novel delaminated Ti3C2/NiFe2O4/V2O5 composite was prepared. Ti3C2 loading was optimized to boost RhB degradation and bacteria disinfection. Ti3C2 cocatalyst-stimulated interface electron separation for photocatalysis. Real effluent treatment and phototoxicity test supported the viability of composite.