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    Öğe
    Novel 2D micro-porous Metal-Organic Framework for hydrogen storage
    (Pergamon-Elsevier Science Ltd, 2016) Ozturk, Zeynel; Kose, Dursun Ali; Sahin, Zarife Sibel; Ozkan, Goksel; Asan, Abdurrahman
    A novel two dimensional Metal-Organic Framework (MOF) structured compound with trimesic acid (TMA), 1,10 Phenantroline (Phen) and Cu(II) building blocks were synthesized and characterized experimentally. Then Grand Canonical Monte Carlo (GCMC) simulation calculations used for determination of hydrogen adsorption capacity and surface characteristics of the compound theoretically. Three different regions were determined for the adsorbent, which were micro, micro/sub-meso spaces inside the adsorbent and the surface regions. It is found that the synthesized compound could uptake approx. 1.3 and 1.2 wt.% hydrogen at 77 K, 100 bars and 1 bar respectively. Thus the adsorbent that is synthesized in this work have strong hydrogen adsorption capability in comparison to the previously reported ones. (C) 2016 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
  • [ X ]
    Öğe
    The new metal complex templated polyoxoborate(s) (POB(s)) structures. Synthesis, structural characterization, and hydrogen storage capacities
    (Elsevier, 2017) Kose, Dursun Ali; Yurdakul, Omer; Sahin, Onur; Ozturk, Zeynel
    The polyoxoborate(s) (POB(s)) structures, including a neutral ligand-metal complex compound as a template, were synthesized and the structural characterizations were performed via single crystal X-ray diffraction, FIR, B-11-NMR, solid state UV-Vis spectroscopy, SEM and elemental analysis methods. Moreover, the stabilization features were determined via TGA/DTA method. In addition, nitrogen and hydrogen adsorption measurements provided the realization to determine the pore size distribution, BET surface area, and hydrogen storage capacities. The molecular formulas of compounds were estimated as [Cu(C12H8N2)(2)(C2H3O2)[B5O6(OH)(4)]center dot 2H(3)BO(3)center dot H2O (I) and [Ni(C12H8N2)(2)(H2O)(2)]center dot(B7O9(OH)(5))center dot 5H(2)O (II) and the existence of two different POB(s) structures as pentaborate (B5O6(OH)(4)) and heptaborate (B7O9(OH)(5)) within the compounds were observed. At last, it was found that the both structures have micro and mesoporosity with 0.407 and 1.480 m(2)/g BET surface areas, for the compound I and II, respectively. Moreover, within the same conditions, compound II could uptake 0.19 wt% hydrogen at 77 K and at the relative pressure of 1 while compound II uptakes 0.035 wt% hydrogen. (C) 2017 Elsevier B.V. All rights reserved.