Bismuth oxybromide/reduced graphene oxide heterostructure sensitized with Zn-tetracarboxyphthalocyanine as a highly efficient photocatalyst for the degradation of Orange II and phenol. Issue 2 (April 2022)

• Record Type: Journal Article
• Authors: Ouedraogo, Seydou; Chouchene, Bilel; Gries, Thomas; Desmarets, Christophe; Balan, Lavinia; Gaumet, Jean-Jacques; Medjahdi, Ghouti; Bayo, Karifa; Schneider, Raphaël
• Is Part Of: Journal of environmental chemical engineering. Volume 10:Issue 2(2022)
• Publication Date: 2022-04
• Subjects: Bismuth oxybromide -- Reduced graphene oxide -- Zinc tetracarboxyphthalocyanine -- Heterostructured photocatalyst -- Photodegradation; Chemical engineering -- Environmental aspects -- Periodicals; Environmental engineering -- Periodicals; Chemical engineering -- Environmental aspects; Environmental engineering; Periodicals; 660.0286
• DOI: 10.1016/j.jece.2022.107332
• Languages: English
• ISSNs: 2213-2929

Abstract

Abstract: The preparation of heterostructured photocatalysts associating BiOBr, reduced graphene oxide (rGO) and zinc tetracarboxyphthalocyanine (ZnPc(CO2 H)4 ) and their performance for the degradation of the Orange II dye and of phenol are reported. The BiOBr/rGO/ZnPc(CO2 H)4 (0.25) photocatalyst displays a superior activity than BiOBr and BiOBr/rGO, indicating that ZnPc(CO2 H)4 enhances both the visible light absorption and the charge carrier separation, which is confirmed by photoluminescence, photocurrent responses and electrochemical impedance spectroscopy Nyquist plots. Scavenging experiments show that the main active species involved in the degradation of Orange II and phenol are superoxide radicals and holes and a mechanism is proposed. Due to its high stability, the BiOBr/rGO/ZnPc(CO2 H)4 (0.25) catalyst shows high potential for real environmental remediation. Graphical Abstract: ga1 Highlights: ZnPc(CO2 H)4 was easily associated to BiOBr/rGO by sonication. High photocatalytic activity owing to the synergy between ZnPc(CO2 H)4 and BiOBr/rGO. Enhanced visible light absorption and charge separation result in improved photoactivity. The BiOBr/rGO/ZnPc(CO2 H)4 photocatalyst is stable and can be reused up to 10 times.