Enhancement of peroxymonosulfate activation through regulating electronic structure of cobalt phthalocyanine by g-C3N4 for rhodamine B degradation

• Published in: Materials letters Vol. 377; p. 137395
• Main Authors: Wen, Hantao, Lai, Yong, Sun, Zhenzhen, Ding, Hanming
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 15.12.2024
• Subjects: Cobalt phthalocyanine; Electron redistribution; Nanocomposites; Oxidation; Peroxymonosulfate; Surfaces; Surfaces; Oxidation; Cobalt phthalocyanine; Peroxymonosulfate; Nanocomposites; Electron redistribution
• ISSN: 0167-577X
• DOI: 10.1016/j.matlet.2024.137395

•CoPc/g-C3N4 composites were successfully synthesized for PMS activation.•CoPc/g-C3N4 composites exhibited enhanced dispersibility and hydrophilicity.•The electron redistribution resulted in electron-rich Co active centers.•CoPc/g-C3N4 composites exhibited significantly enhanced PMS activation capability. The catalytic performance of cobalt-based catalysts in Fenton-like reactions is significantly influenced by the electron density of Co centers. However, precise control of the electronic structure to enhance the degradation activity remains a challenge. This paper demonstrates a method to enhance the catalytic activity of cobalt phthalocyanine (CoPc) by modulating its electronic structure via integrating with graphitic carbon nitride (g-C3N4). The electron redistribution between g-C3N4 and CoPc was observed, resulting in electron-rich Co centers. Consequently, the CoPc/g-C3N4 composites exhibit significantly enhanced peroxymonosulfate (PMS) activation capability compared to CoPc and their physical mixtures. The improved catalytic performance is due to the electron-rich Co centers, better dispersion of CoPc, and enhanced hydrophilicity. This study proposes a novel strategy for the design of efficient PMS activation catalysts.