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

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• 作者：Jakub Tolasz ; ^{tolasz@iic.cas.cz" class="auth_mail" title="E-mail the corresponding author} ; Martin &Scaron ; ťastný ; Vá ; clav &Scaron ; tengl
• 关键词：Graphene ; Manganese(IV) oxide ; Graphene oxide ; Stoichiometric degradation
• 刊名：Materials Today: Proceedings
• 出版年：2016
• 出版时间：2016
• 年：2016
• 卷：3
• 期：8
• 页码：2795-2806
• 全文大小：3689 K

文摘

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.