Photothermal Synergetic Fenton Catalytic Degradation for Methylene Blue Via NIR-Driven Polypyrrole Modified Magnetic Melamine Foam

Abstract

In this study, Fe³⁺ was polymerized on the surface of melamine foam by polypyrrole, and then through a series of reactions with ammonia and Fe²⁺, polypyrrole and Fe<inf>3</inf>O<inf>4</inf>, functionalized hollow melamine foam (MF@PPy-Fe<inf>3</inf>O<inf>4</inf>) was successfully prepared and observed through scanning electron microscope (SEM). The catalytic degradation of methylene blue (MB) by MF@PPy-Fe<inf>3</inf>O<inf>4</inf> catalyst in aqueous solution was studied under 808nm NIR laser. The catalytic degradation of MB by MF@PPy-Fe<inf>3</inf>O<inf>4</inf> was investigated. Compared with the traditional Fe<inf>3</inf>O<inf>4</inf> nanocatellates, MF@PPy-Fe<inf>3</inf>O<inf>4</inf> perform good Fenton catalytic activity in the degradation of organic dyes such as MB. Fenton reaction rate in the organic dyes degraded like MB. This study pioneered the use of photothermal synergetic Fenton catalytic effect to degrade MB, which has never been done before. Beside, MF@PPy-Fe<inf>3</inf>O<inf>4</inf> has good photothermal stability and can be easily separated from the reaction medium. The results show that MF@PPy-Fe<inf>3</inf>O<inf>4</inf> has good latent using value on the treatment of industrial wastewater.