Preparation and Properties of the Pyridine Intercalates of Bismuth Molybdic Acid

Murakami, Yasushi; Yamaguchi, Fumihide; Ishiyama, Osamu; Imai, Hisao

doi:10.1016/s0167-2991(08)63238-3

Cited by 1 publication

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“…[1][2][3] There are a number of transition metal oxides and their oxysalts that are interesting candidates for host layers, which are used to synthesize porous pillared materials with different pore structures and properties. The pillared compounds of titanates, 4,5 zirconium oxide and phosphates, [6][7][8][9] niobium oxide, 10 and bismuth molybdic acid 11 with layered structures have been studied extensively in terms of synthesis methods, properties, and their applications. TEOS is one of the commonly used silica sources; it has been used for pillaring other layered hosts such as magadiite and zirconium phosphate.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Thermally Stable Silica-Pillared Layered Manganese Oxide by an Intercalation/Solvothermal Reaction

et al. 2001

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Silica-pillared layered manganese oxide with high surface area and high thermal stability was first synthesized from birnessite(H)-type manganese oxide by intercalation of octylamine followed by tetraethyl orthosilicate (TEOS) molecules and then by solvothermal treatment in TEOS liquid. Layered phases of manganese oxide with basal spacings of 2.01 and 2.43 nm, respectively, were obtained for each intercalation reaction. The Si/Mn molar ratio increased from 0.63 to 0.84 by the solvothermal treatment, but the basal spacing (2.44 nm) of the layer barely increased. The increase of silica content stabilized the pillared structure against thermal treatment. Porous layered manganese oxides were obtained by heating the silica-pillared material at appropriate temperatures. The manganese oxide sample obtained at 400 °C had a BET surface area of 260 m2/g with a gallery height of about 1.6 nm between layers.

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