Efficient degradation of tetracycline over Co/La oriented on g-C3N4 with the outstanding oxygen activation property under visible light. Issue 3 (June 2022)

• Record Type: Journal Article
• Authors: Ma, Yingying; Sun, Meng; Mominou, Nchare; Zuo, Ning; Li, Shuzhen; Jing, Chunyu; Wang, Lei
• Is Part Of: Journal of environmental chemical engineering. Volume 10:Issue 3(2022)
• Publication Date: 2022-06
• Subjects: Degradation of tetracycline -- Co/La nanoparticles -- g-C3N4 -- Visible light; Chemical engineering -- Environmental aspects -- Periodicals; Environmental engineering -- Periodicals; Chemical engineering -- Environmental aspects; Environmental engineering; Periodicals; 660.0286
• DOI: 10.1016/j.jece.2022.107916
• Languages: English
• ISSNs: 2213-2929

Abstract

Abstract: Surface of g-C3 N4 nanosheets was decorated with < 1 nm sized Co/La oxides by deposition and in-situ thermal polymerization to obtain Co/La@g-C3 N4 composites. Results of photo-electrochemical and XPS showed Co/La were combined with N on g-C3 N4 by non-covalent bonds, which facilitated the charge transfer and separation and the visible light absorption. The degradation ratio of tetracycline and the COD value of the solution were 100% and 19.2, respectively, for 80 min under visible light showing the degradation of tetracycline over 0.63 wt% Co/La@g-C3 N4 was superior to the other photocatalyst might be because of the confinement effect between layers and the synergistic effect of Co, La, and g-C3 N4 . Also, we speculated about the photocatalytic degradation intermediate products and mechanism of tetracycline depending on the results of experiments and LC-MS. Therefore, Co/La@g-C3 N4 could be applied in exploiting to effectively remove pharmaceutical pollutants from wastewater under sunlight. Graphical Abstract: ga1 Highlights: Co/La oxides decorated g-C3 N4 nanosheets are prepared. Co/La@g-C3 N4 NPs traps excited electron and forbids the e − /h + recombination. Under visible light, the formation of O 2- and OH effectively oxidize the TC. The photocatalytic degradation efficiency of TC was 100%. The confined effect between layers and synergistic effect between Co/La and g-C3 N4 .