Effect of Cerium Doping on the Textural, Structural and Antibacterial Properties of Zinc Oxide

Zinc oxide (ZnO) and cerium-doped zinc oxide Zn 1 – x Ce x O ( x = 0.03~0.20) series samples were successfully synthesized by a hydrothermal method. According to SEM, TEM and EDX, the synthesized Zn 1 – x Ce x O( x = 0.03~0.20) particles were micro-spheres self-assembly constructed from nano-grain units without base-catalysis. And BET data further confirmed the existence of mesoporous structure with uniform interparticle distribution in the hollow micro-spheres. XRD revealed cerium-doping would change crystal sizes, crystal lattice constant and a new phase of zinc-doped cerium oxide occurred at higher doping level of cerium more than 20%, suggesting that two phases of ZnO doped with cerium and CeO 2 doped with zinc existed at exceeding the limit of doping. XPS characterized that Ce-doping in ZnO facilitated formation of more oxygen vacancies. 5% addition of Cerium makes zinc oxide particles positively charged, zeta potential higher and specific surface area larger. And Zn 0.95 Ce 0.05 O sample had more effective activity for the inhibition of S. aureus and E. coli growth.