Photocatalytic properties and electrochemical characteristic of a novel biomimetic oxygenase enzyme photocatalyst iron(II) tetrahydroxymethyl tetra(1,4-dithiin) porphyrazine for the degradation of organic pollutants

• DOI: 10.1016/j.molcata.2013.02.013
• Publication Date: 2013-02-26T05:31:31Z
• Authors: Lianqing Chen; Zehui Zhang; Yajuan Wang; Yayun Guan; Kejian Deng; Kangle Lv; Jie Sun; Zhe Li; Mei Li
• Keywords: 13. Climate action; 01 natural sciences; 0104 chemical sciences

Abstract A novel photocatalyst iron(II) tetrahydoxymethyl-tetra(1,4-dithiin) porphyrazine (abbreviated as FePz(hmdtn) 4 ) has been successfully synthesized by template method. The prepared FePz(hmdtn) 4 ) was further characterized by UV–vis, FT-IR, 1 H NMR, LC–MS, XPS. FePz(hmdtn) 4 supported on an Amberlite CG-400 resin was used as a biomimetic catalyst for the activation of molecular oxygen with visible light to degrade a probe dye compound Rhodamine B (RhB) in aqueous solution with the degradation yield in 79% for 24 h. By means of cyclic voltammetry, the E HOMO and the Δ E HOMO–LUMO were obtained by comparing the CV and DPV spectra of the metal-free compound with FePz(hmdtn) 4 , which indicated the central Fe 2+ showed strong electron donating property for activating molecular oxygen to degrade organic pollutants. The electrochemical results were further verified by the quantum chemical DPT calculation.