Green tide deactivation with layered-structure cuboids of Ag/CaTiO₃ under UV light

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• 作者：Soo-Wohn Lee ; L.M. Lozano-S谩nchez ; V. Rodr铆guez-Gonz谩lez
• 关键词：Green tide ; Noxious Tetraselmis suecica ; CaTiO3 cuboids ; Peroskite-like ; Silver nanoparticles
• 刊名：Journal of Hazardous Materials
• 出版年：15 December, 2013
• 年：2013
• 卷：263
• 期：part_P1
• 页码：20-27
• 全文大小：2430 K

文摘

In this work, an alternative to deactivate noxious green tide Tetraselmis suecica in the short-term is proposed by employing Perovskite-like cube-shaped, crystalline CaTiO₃ semiconductors functionalized with atomic silver nanoparticles. CaTiO₃ was prepared by a microwave-assisted hydrothermal method and then Ag⁰NPs (1 wt% of CaTiO₃), were added by the photoreduction method. The XRD results show that crystalline CaTiO₃ has an orthorhombic unit cell with a Perovskite-like structure. Images obtained by FESEM and HRTEM microscopies show well-faceted CaTiO₃ rectangular prismatic morphology functionalizated with silver nanoparticles 鈭?3.5 nm. XPS and EDS-FESEM has confirmed the composition of CaTiO₃ and silver occurring mainly as reduced metal. The UV inactivation of noxious T. suecica with Ag/CaTiO₃ nanocomposites formed on bare materials results in complete deactivation of the algae in 12 min. The direct contact between harmful algae and Ag/CaTiO₃ nanocomposite is necessary to deactivate the algae and inhibits algae viability.