ZnO-Bi2O3/graphitic carbon nitride photocatalytic system with H2O2-assisted enhanced degradation of Indigo carmine under visible light

• Published in: Arabian journal of chemistry Vol. 13; no. 2; pp. 3790 - 3800
• Main Authors: Huy, Bui The, Paeng, Da Seul, Thi Bich Thao, Chu, Kim Phuong, Nguyen Thi, Lee, Yong-Ill
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.02.2020; Elsevier
• Subjects: Degradation; Hydroxyl radicals; Indigo carmine; Mineralization; Photocatalyst; Degradation; Hydroxyl radicals; Mineralization; Indigo carmine; Photocatalyst
• ISSN: 1878-5352; 1878-5379
• DOI: 10.1016/j.arabjc.2019.01.003

[Display omitted] Indigo carmine in aqueous solution was effectively degraded using ZnO-Bi2O3/Graphitic Carbon Nitride heterojunction structure by visible light/H2O2 system. The mechanism of photocatalytic degradation of Indigo carmine shows the responsible species for the degradation of Indigo carmine in the ZnO-Bi2O3-xC3N4/H2O2/visible light system (x = 0, 1, 2, and 3) is the hydroxyl radicals which were generated from the reaction of e− and h+ with H2O2. Under optimal conditions, ZnO-Bi2O3-2C3N4/H2O2/Vis system degraded more than 93% of Indigo carmine in 180 min. Besides, the kinetic of the photocatalytic process was detailed. These results demonstrate that the ZnO-Bi2O3-2C3N4/H2O2/visible light system may become a promising approach to achieve efficient environmental remediation as an environmentally friendly oxidant.