Synthesis of hierarchical FePc-ZS-1 zeolites and its rapid photocatalytic degradation of MB under visible light and H2O2

Abstract

This manuscript details the successful production of hierarchical FePc-ZS-1 zeolite with rapid visible photocatalytic properties through an impregnation method utilizing reactive dyes as a sensitizing agent. The impact of the dye species on the visible photocatalytic properties of the resulting products was thoroughly examined in a Fenton reaction system created by combining H2O2 and the synthesized materials. The synthesized materials were subjected to characterization through various methods including XPS, XRD, FTIR, SEM, and N2 adsorption-desorption isotherm.The synthetized FePc-ZS-1 zeolite is an ellipsoid with smooth surface, highly ordered pore structure, and characteristic peaks in the visible region of 400–800 nm. The final results indicate that the phthalocyanine dye-sensitized zeolite had the most significant impact on the visible light degradation efficiency of methylene blue dye solution. The degradation efficiency of FePc-ZS-1 zeolite on MB solution reached an amazing 99.96 % in just 30 min. After examining the photocatalytic activity and kinetics model, it was determined that the photocatalytic activity is consistent with the apparent first-order kinetic model. Furthermore, through radical capture experiments and ESR characterization, the hypothesized mechanism of the photocatalytic reaction and the MB degradation pathways were thoroughly addressed. Finally, the samples were subjected to reuse experiments, and the results showed that the degradation rate was still above 90 % after 5 times of reuse, with good recyclability. The above results indicate that the visible photocatalytic material prepared in this study is a promising source of green energy, which is worthy of further application.