Microwave-hydrothermal Preparation of Flower-like ZnO Microstructure and its photocatalytic activity

• 出 处: 2012 Postdoctoral Symposium of China on Materials Science &a
• 发表日期: 2012年期

　　The flower-like ZnO microstructure was prepared by a straightforward microwave-hydrothermal technique using zinc chloride and arginine solution as reactants.The crystal structure and morphology of the as-synthesized are characterized by x-ray diffraction(XRD), scanning electron microscopy(SEM) and the optical properties of the ZnO nanostructure were studied by Raman and photoluminescence (PL) spectra, which confirmed the high crystal quality of ZnO microstructure.The as-synthesized ZnO flowers exhibited a significant enhancement of photocatalytic capability toward degrading methyl blue (MB) under UV light, the photodegradation of MB reaches 95.60 %, close to 100% only within 2 h of adding the as-synthesized ZnO in the MB solution under UV irradiation.Furthermore, the photodegradation could be described as the pseudo-first-order kinetics with degradation rate constants ranging from 1.0675-1.6275 h-1, which were based on the morphology of the structures.