Catalytic Performance of Fe3O4@G2-PAMAM/MoO3 Magnetic Nanocomposites for Degradation of 4-NP to 4-AP

Abstract

We managed to produce Fe3O4 magnetic nanoparticles and coat them with APTES and TEOS as a buffer. 2nd generation PAMAM dendrimers were used to cover the APTES and TEOS coated core. The surface of the multi-shelled structure was decorated with MoO3 nanoparticles where Fe3O4@G2/MoO3 dendrimer-based nanocomposites were obtained. Nanocomposites exhibit superparamagnetic characteristics. The structure of composites was assessed by SEM and EDS. TEM gives us a detailed insight about nanocomposites. Magnetic behaviours of the nanoparticles were investigated using vibrating sample magnetometry. The catalytic performance of the Fe3O4@G2/MoO3 dendrimer-based nanocomposites was assessed using UV-vis spectrophotometry for the degradation of 4-Np to 4-AP. It was seen that our nanocomposites exhibit outstanding catalytical performance. Kapp value was calculated as 5x10-4 s-1.