The 2012 World Congress on Advances in Civil, Environmental, and Materials Research (ACEM’ 12) Seoul, Korea, August 26-30, 2012 Photocatalytic properties of P25 nanoparticles impregnated ZnO flowers prepared via hydrothermal process Hem Raj Pant * , Cheol Sang Kim Department of Bionanosystem Engineering, Chonbuk National University, Jeonju, Republic of Korea ABSTRACT TiO 2 -impregnated ZnO flowers were synthesized from the aqueous suspension containing ZnO precursor and commercial P25 (TiO 2 ) NPs using hydrothermal process. The morphology and structure of as-synthesized particles were characterized by field emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), and X-ray diffraction (XRD), which revealed that TiO 2 NPs were attached on the surface of ZnO flower. It was observed that the presence of TiO 2 NPs in the hydrothermal solution could sufficiently decrease the size of ZnO flower. The hybrid nanostructure, with unique morphology, obtained from this facile one-pot method was found to be effective photocatalyst under UV-irradiation. 1. INTRODUCTION Water and air pollution gave birth to an improvement of the oxidative and catalytic degradation of organic compounds present in water and air. Photocatalysis