The core–shell photocatalysts can also maintain high photocatalytic activity even after running for five cycles. ZnO SiO2 Core Shell Nanoparticles: Core shell nanoparticles increases the quantum by passivating the surface trap states.The shell provides protection against environmental changes, photo-oxidative degradation, and provides another route for modularity. Furthermore, it is worth noting that these multifunctional microspheres exhibit excellent magnetic response and high stability. The effect of the CdS loading amount on the photocatalytic activity was also investigated and the results indicate that Fe 3O with 10.1 wt% CdS exhibits the best photocatalytic ability. The amount of CdS in the core–shell microspheres can be controlled by adjusting the SILAR cycles. The synthesised core/shell nanomaterial was characterized using XRD, FTIR, UV-VIS spectroscopy, Raman spectroscopy, TEM and PL analysis. Thus, ZnO/SiO 2 core/shell nanoparticle was synthesised by wet chemical method for fluorescent probing and drug delivery application. Compared with the Fe 3O microspheres, the Fe 3O microspheres show remarkably enhanced visible light photocatalytic activity, benefiting from the sensitization of CdS, which can extend the visible light absorption and facilitate the separation of photoinduced carriers. ZnO nanoparticles, due to its biocompatibility and low cost, have shown potential application in bioimaging and drug delivery. Photocatalytic performances were evaluated by the photocatalytic elimination of rhodamine B (RhB) under visible light irradiation. The morphology, composition, and optical and magnetic properties of those core–shell microspheres were characterized by various analytical techniques. Herein, we developed the design and synthesis of urchin-like Fe 3O core–shell microspheres, in which the multiple functional components were integrated successfully into a single microcomposite.

Sio2 and zno core shell