Magnetic composite microspheres with exposed {001} faceted TiO2 shells: a highly active and selective visible-light photocatalyst†
Abstract
We have demonstrated a sandwich-structured Fe3O4/SiO2/Au/TiO2 photocatalyst, which shows magnetic separability, selective absorption and photocatalysis activity, and high efficiency, in catalyzing the decomposition of organic compounds under illumination of visible-light and simulated sunlight. The structural design of the photocatalyst takes advantage of the dense, homogeneous structure and the AuNPs content (ca. 4 nm, 1.63 wt%), which is prepared by a simple method. It possesses high efficiency visible-light photocatalytic activity due to the stable from