Abstract
Ni2P/ZnO core/shell composites were fabricated basing on combining hydrothermal route with a facile chemical precipitation method. The characterization results show that the composites are comprised of the hexagonal Ni2P microspheres and hexagonal ZnO nanoparticles. In which, ZnO nanoparticles coat on the surfaces of Ni2P microspheres and some of them even assemble to worm-like structure. During the coating process, Zn2+ was absorbed on the surface of Ni2P microspheres by electrostatic interaction and then formed ZnO shell. But excessive Zn2+ can affect the crystalline and formation of core-shell structure of Ni2P/ZnO composites, so it is necessary to control the amount of Zn2+. Choosing Methylene Blue (MB) as a typical organic dye, the as-prepared Ni2P/ZnO core/shell composites show the enhanced photocatalytic degradation activity, which may be due to its better adsorption ability and the effective separation of photogenerated electron–hole pairs.
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