Graphene oxide-mesoporous delta-MnO2 nanocomposite as a novel destructive sorbent

0463721 - ÚACH 2017 RIV NL eng C - Konferenční příspěvek (zahraniční konf.)
Tolasz, Jakub - Šťastný, Martin - Štengl, Václav
Graphene oxide-mesoporous delta-MnO2 nanocomposite as a novel destructive sorbent.
Materials Today: Proceedings. Amsterdam: Elsevier, 2016, s. 2795-2806. ISSN 2214-7853.
[International conference on Advanced Nanomaterials /6./, International conference on Graphene Technology /1./, International conference on Hydrogen Energy /1./ - ANM2015. Aveiro (PT), 20.07.2015-22.07.2015]
Grant CEP: GA MŠMT(CZ) ED3.1.00/14.0328
Institucionální podpora: RVO:61388980
Klíčová slova: Graphene * Manganese(IV) oxide * Graphene oxide * Stoichiometric degradation
Obor OECD: Inorganic and nuclear chemistry

A graphene oxide-mesoporous birnessite-type δ-MnO2 nanocomposite (GO-MnO2) was prepared by thermal hydrolysis of suspension potassium permanganate (KMnO4), 2-chloroacetamide and with graphene oxide (GO) in aqueous solution. The prepared nanocomposites samples were characterized by Brunauer–Emmett–Teller surface area (BET) and Barrett–Joiner–Halenda porosity, X-ray Diffraction (XRD), high-resolution scanning electron microscopy (HRSEM) and high-resolution transmission electron microscopy (HRTEM) with energy dispersive x-ray spectroscopy (EDS) for create the map of elements. The degradation activity of the prepared samples was assessed from the kinetics of the stoichiometric degradation of parathion methyl (PM) in the polar solution (acetonitrile). It was shown that prepared samples were effective in decomposition of PM by cleavage of the P-O-aryl bond in the pesticide molecule. The degradation mechanism for PM on the GO-MnO2 surfaces was proposed.
Trvalý link: http://hdl.handle.net/11104/0263592