Abstract
Highly porous titanium oxophenylphosphate (TPP-1) has been synthesized hydrothermally at 448 K using phenylphosphonic acid (PPA) as the organophosphorus source without the aid of any template or structure-directing agent (SDA). Powder XRD, TEM, SEM-EDS, N 2 sorption, ICP-AES chemical analysis, 13C and 31P MAS NMR, UV–Vis, XPS spectroscopic tools, TG-DTA and NH 3-TPD were used to characterize this material. XRD, N 2 sorption and TEM image analysis suggested the disordered layered framework structure and the presence of large-size micropores along with mesopores in this material. Spectroscopic data suggested the presence of phenyl group, O, Ti and P in this open-framework material, where Ti centers can adopt both tetrahedral and octahedral geometry. TPP-1 showed fairly good H 2 adsorption capacity under normal pressure to high pressure at 77 K. Physisorption data on hydrogen has suggested the potential application of this porous material in H 2 storage.
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