Effect of increased dendrimer generations on the TiO2 magnetic cored dendrimers

Abstract

Magnetic-cored dendrimer can effectively function as an absorbent and be recovered by magnetic force. In this paper, four types of magnetically recoverable mesoporous photocatalysts were prepared by individual grafting of TiO2 nanoparticles on magnetic cored dendrimer with generation 0, 1, 2, 3. Divergence method through repeatition growth was used for synthesis TiO2 functionalized magnetic-cored dendrimer. Nano TiO2-particles cohension together, and then lose merit associated with the surface area of nano TiO2-particle. Dendrimer’s fractal structure makes nano-TiO2 particles of functional group disperse in the water, so we can make full use of the surface area of each nano-particle and improve photocatalysis. The BET analysis supports the mesoporous properties of TiO2 modified magnetic cored dendirmer (TiO2-MCD). This new material was characterized by Scanning electron microscopy (SEM), Energy dispersive spectroscopy (EDS) analysis, X-ray diffraction (XRD) and Fourier transform-infrared spectroscopy (FT-IR). The photodegradation of methyl orange kinetics follows the pseudo-first-order model. Furthermore, the TiO2-MCD can be easily recycled by an external magnetic field. This novel mesostructure TiO2-MCD is significant due to its potential applications in solar-cell, photocatalysis, and water treatment processes.