Xia Luyan, Lu Yingzhou, Meng Hong, Li Chunxi
State Key Laboratory of Chemical Resource Engineering, Beijing, 100029, PR China; College of Chemical Engineering, Beijing, 100029, PR China.
College of Chemical Engineering, Beijing, 100029, PR China.
J Hazard Mater. 2020 Jul 5;393:122487. doi: 10.1016/j.jhazmat.2020.122487. Epub 2020 Mar 6.
Three nanocomposites of carbon and MnOx (C-Mns) were prepared via mechanochemical reaction of CaC with excessive MnO in a planetary ball mill. Their structure and composition were analyzed by XPS, Raman, FT-IR, XRD, N adsorption-desorption, SEM and TEM, respectively, and their adsorption performance for heavy metal ions was studied. In addition, a series of nanocomposites of carbon and transition metal oxides (C-MOx) were prepared by ball milling CaC with excessive TiO, VO, FeO, CuO, MoO, CoO, and CrO, respectively, and their adsorptivity was evaluated. C-Mn is a micro-mesoporous sorbent with rich MnOx, alkynyl and oxygenated groups, and moderate specific area (∼180 m g), showing excellent Pb adsorption with its saturated adsorptivity being 404.4 mg-Pb g. Further, it is also effective for other heavy metals (Hg, Cd, Cr, Zn and Cu). Some C-MOx show even better adsorptivity for Pb and Hg, being superior to most of the advanced carbon-based sorbents. We reported herein a facile method for preparing a new kind of C-MOx nanocomposites for the efficient adsorption of heavy metal ions from wastewater.
通过在行星式球磨机中使CaC与过量MnO进行机械化学反应，制备了三种碳与MnOₓ的纳米复合材料（C-Mns）。分别通过XPS、拉曼光谱、傅里叶变换红外光谱、X射线衍射、N₂吸附-脱附、扫描电子显微镜和透射电子显微镜对其结构和组成进行了分析，并研究了它们对重金属离子的吸附性能。此外，通过分别将CaC与过量的TiO₂、VO₂、Fe₂O₃、CuO、MoO₃、CoO和CrO进行球磨，制备了一系列碳与过渡金属氧化物的纳米复合材料（C-MOx），并对其吸附性进行了评估。C-Mn是一种具有丰富MnOₓ、炔基和含氧基团以及适中比表面积（约180 m²/g）的微介孔吸附剂，对Pb表现出优异的吸附性能，其饱和吸附量为404.4 mg-Pb/g。此外，它对其他重金属（Hg、Cd、Cr、Zn和Cu）也有效。一些C-MOx对Pb和Hg表现出更好的吸附性，优于大多数先进的碳基吸附剂。本文报道了一种简便的方法，用于制备新型C-MOx纳米复合材料，以高效吸附废水中的重金属离子。
