Synthesis and characterization of porous chromia-pillared layered lanthanum niobic acid |
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| Institution: | 1. Department of Chemistry, University of Oslo, FERMiO, Centre for Materials Science and Nanotechnology, Gaustadalleen 21, NO-0349 Oslo, Norway;2. Department of Physics, University of Oslo, Centre for Materials Science and Nanotechnology, Gaustadalleen 21, NO-0349 Oslo, Norway;1. School of Materials Science & Engineering, Pusan National University, Busan 609-735, Republic of Korea;2. Metallurgical & Materials Engineering, Colorado School of Mines, 1500 Illinois Street, Golden, CO 80401, USA;1. Editor, Trends in Chemistry |
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| Abstract: | The first chromia-pillared layered lanthanum niobic acid was prepared by an ion-exchange route, in which n-hexylamine-pre-expanded lanthanum niobate reacted with chromium(III) acetate Cr(OAc)3] aqueous solution under reflux condition, and the ion-exchanged product was calcined at 450 °C in air flow. The structure of the novel pillared material was examined by means of various analytical techniques, such as powder X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), thermogravimetric and differential analysis (TG/DTA), nitrogen adsorption–desorption, and transmission electron micrographs (TEM). The chromia-pillared layered lanthanum niobic acid exhibited a porous layered structure with a BET (Brunauer-Emmett-Teller) surface area of 89 m2·g− 1 and an interlayer distance of 1.31 nm. The layered structure could be retained up to 550 °C. |
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