Synthesis of iron phthalocyanine/CeO 2 Z-scheme nanocomposites as efficient photocatalysts for degradation of 2,4-dichlorophenol

• Published in: Dalton transactions : an international journal of inorganic chemistry 2024-08, Vol.53 (34), p.14325-14332
• Main Authors: Chu, Xiaoyu, Wang, Xinrui, Tian, Shuo, Zhao, Yongkuo, Liu, Shikai, Yan, Hong, Shang, Yan
• Format: Article
• Language: English
• ISSN: 1477-9226; 1477-9234
• DOI: 10.1039/d4dt01271b

Modulating the photogenerated electrons of CeO to activate O and efficiently photocatalytic degradation of chlorophenols is a highly desired goal. Herein, we have successfully fabricated an FePc/CeO heterojunction through H-bond induced assembly. The photocatalytic degradation of 2,4-DCP by the amount-optimized FePc/CeO nanocomposite was improved by 3 times compared with that by pure CeO . By means of electron paramagnetic resonance (EPR) and single wavelength photocurrent spectroscopy, it is confirmed that the excellent photocatalytic performance is mainly attributed to the formation of the Z-scheme heterojunction, which promotes charge separation and transfer, and the introduction of FePc broadens the visible light absorption range of the heterojunction. Moreover, O temperature-programmed-desorbed curves and electrochemical O reduction measurement results demonstrate that the single Fe-N (II) site in FePc is more conducive to promoting O activation than that of other metal phthalocyanines. Based on FT-IR and liquid chromatography-tandem mass spectrometry (LC-MS/MS), a possible reaction pathway of 2,4-DCP degradation was proposed. This study provides a novel strategy for preparing CeO based Z-scheme heterojunctions with abundant monoatomic sites for pollutant degradation.