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Li Y.,Tianjin University | Li Y.,DONG Energy | Cai X.,Tianjin University | Guo J.,Tianjin University | And 3 more authors.
Applied Surface Science | Year: 2015

A series of iron and titanium co-pillared montmorillonites (Fe-Ti/MMT) were prepared using hydrolysis of inserted titanium and different iron content in montmorillonite (MMT). The Fe-Ti/MMT were characterized by X-ray fluorescence, N2 adsorption and desorption, X-ray diffraction, scanning electron microscopy (SEM) and transmission electron microscopy (TEM), confirming the effective insertion of Fe species and TiO2 in the MMT. The Fe-Ti/MMT was used to remove arsenite (As(III)) from aqueous solutions under different conditions. The result of As(III) adsorption under UV irradiation showed that the photo activity can be enhanced by incorporating Fe and Ti in MMT. Fourier-transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS) analysis indicated that the hydroxyl groups bonded to metal oxide (M-OH) played an important role in the adsorption of As(III). © 2014 Elsevier B.V. All rights reserved.

Shi J.,718th Research Institute of CSIC | Liu X.-L.,718th Research Institute of CSIC | Yan Y.,718th Research Institute of CSIC | Dong Y.-F.,718th Research Institute of CSIC | And 6 more authors.
Inorganic Chemistry Communications | Year: 2013

By using the 1,3-benzenedicarboxylates (1,3-BDC) ligand in the hydrothermal reaction with Pb(NO3)2, we obtained a novel coordination polymer Pb13Na(μ3-O)(μ3-OH)(BDC) 12. The Pb atoms and the 1,3-BDC ligands connect to each other and form a 3-D infinite framework which contains a Pb12 icosahedron and an O20 dodecahedron. These two polyhedrons construct a novel Pb 12O20 large cage. The high-coordinated Pb atoms in Pb 12 cluster have abnormal hemidirected coordination geometries because of the rigidity of the cluster, while the other eight-coordinated Pb atoms have holodirected geometry. Pb13Na(μ3-O)(μ3- OH)(BDC)12 has a similar structure with the M@Pb12 Zintl ion. © 2013 Elsevier B.V.

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