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    Dye removal by polymer derived ceramic nanobeads

    Year: 2021

    Journal: Ceram. Int., Volume 47, OCT 1, page 27050–27057

    Authors: Icin, Oyku; Vakifahmetoglu, Cekdar

    Organizations: Alexander von Humboldt (AvH) Foundation

    Keywords: Silicon oxycarbide; Titanium dioxide; Coating; Methylene blue; Photocatalysis

    Emulsion processed polymer derived ceramic (PDC) nanobeads are used for Methylene Blue dye removal from aqueous solutions. The PDC nanobeads, produced at 600 degrees C and 1200 degrees C pyrolysis, are subsequently coated with titania (anatase). Titania-coated nanobeads show less than 35%, i.e., limited dye adsorption capability in dark. Instead, enhanced total removal efficiency (similar to 97%) is obtained when the initial adsorption is succeeded by photodegradation under UV. Direct reusability tests show that even after the third cycle, very high regeneration efficiencies being above 92% are observed for titania-coated nanobeads.
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