Herein, we develop a reproducible in situ crystallization
route to synthesize uniform functional ZSM-5 microspheres composed
of aggregated ZSM-5 nanorods and well-dispersed uniform Fe3O4 nanoparticles (NPs). The growth of such unique microspheres
undergoes a NP-assisted recrystallization process from surface to
core. The obtained magnetic ZSM-5 microspheres possess a uniform size
(6–9 μm), ultrafine uniform Fe3O4 NPs (∼10 nm), good structural stability, high surface area
(340 m2/g), and large magnetization (∼8.6 emu/g)
and exhibit a potential application in Fischer–Tropsch synthesis