Aluminum and gallium oxide-pillared molybdenum oxide (MoO3)

Nazar, Linda F.; Liblong, S. W.; Yin, Xu

doi:10.1021/ja00015a068

Cited by 49 publications

(22 citation statements)

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“…The interlayer spacing of products from both procedures (rinsing of Mo bronze with water versus rinsing with a solution of sodium molybdate followed by neutralization with acid) is very slightly lower for the 'acidic" sample, and closer to that quoted in ref 15. 9 1 .2z We suggest that The pH of the pillaring solution is known to influence the pillaring process.…”

Section: Resultssupporting

confidence: 71%

Intercalation of polyoxycation species into conducting layered host lattices of molybdenum trioxide and tantalum disulfide

Lerf¹,

Lalik²,

Kołodziejski³

et al. 1992

J. Phys. Chem.

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Strukul, G.; (7) Mazzocchia. C.: Temuesti. E.; Gronchi, P.; Giuffre, L.; Zanderighi, L.Zanderighi, L. J. Coral. 1985, 96, 106. J . i.aia/. 1988, iii, 345. * (8) Guglielminotti, E. J. Caral. 1989, 120, 287. (9) Yashitake. H.; Iwasawa, Y., to be published. (IO) Yashitake, H.; Iwasawa, Y., to be published. (11) Sayers, D. A.; Stern, E. A,; Lytle, F. W. Phys. Rev. Lett. 1971, 35, (12) Oyanagi, H.; Matsushita, T.; Ito, M.; Kuroda, H. KEK Rep. 1984, (13) Kasugi, N.; Kuroda, H. Program EXAFS2; Research Center for -204. 83. Nomura, M. KEK Rep. 1985, 85. Polyoxycations [A104A112(OH)24 ( H Z O )~~]~' and [B&(OH)lz]6+were introduced into highly crystalline MOO3 (space group Pnma) and 2H-TaSz (P6,lmmc) by ion exchanging the sodium forms of hydrated layered compounds. Interlayer spacing in MOO, increases from 6.97 to 18.1-18.9 A, more than would be expected from the sum of the spacing in the parent compound and the diameter of the All, polyoxycation. We suggest that the MOO, layers in the intercalated material are shifted with respect to one another, so that the terminal oxygen atoms of the MOO6 octahedra of adjacent layers point toward each other. The heat-treated material has a higher degree of stacking order, and it is clear that the Al13 unit survives the heat treatment. z7Al MAS and 'H2N CP/MAS NMR spectra reveal that Merent environments for interstitial aluminum are simultaneously present in the sample. The [B~(OH)lz]6+ cation was introduced into a layered host lattice for the first time. The interlayer distance of the product is 13.8 A, in agreement with the largest oxygen-oxygen distance in the cation.

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Section: Resultssupporting

confidence: 71%

Intercalation of polyoxycation species into conducting layered host lattices of molybdenum trioxide and tantalum disulfide

Lerf¹,

Lalik²,

Kołodziejski³

et al. 1992

J. Phys. Chem.

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“…The history of nanosheets, or exfoliated sheets, dates as far back as the 1950s, when smectite‐type clay minerals were reported to disperse well in water and yield a colloidal suspension as a consequence of spontaneous exfoliation or delamination 1, 2. Since the 1970s, exfoliation of a wide range of inorganic layered compounds, including metal chalcogenides,3 metal phosphates, and phosphonates,4 as well as layered metal oxides,5–9 has been achieved through an appropriate combination of interlayer cations and solvents. Unlike smectite clays with a very weak interlayer interaction due to a low layer charge density, these layered compounds have a higher layer charge density and require chemical modifications or interlayer composition changes to artificially promote the exfoliation process assisted by a weak shear force.…”

Section: Introductionmentioning

confidence: 99%

Nanosheets of Oxides and Hydroxides: Ultimate 2D Charge‐Bearing Functional Crystallites

2010

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A wide variety of cation-exchangeable layered transition metal oxides and their relatively rare counterparts, anion-exchangeable layered hydroxides, have been exfoliated into individual host layers, i.e., nanosheets. Exfoliation is generally achieved via a high degree of swelling, typically driven either by intercalation of bulky organic ions (quaternary ammonium cations, propylammonium cations, etc.) for the layered oxides or by solvation with organic solvents (formamide, butanol, etc.) for the hydroxides. Ultimate two-dimensional (2D) anisotropy for the nanosheets, with thickness of around one nanometer versus lateral size ranging from submicrometer to several tens of micrometers, allows them to serve either as an ideal quantum system for fundamental study or as a basic building block for functional assembly. The charge-bearing inorganic macromolecule-like nanosheets can be assembled or organized through various solution-based processing techniques (e.g., flocculation, electrostatic sequential deposition, or the Langmuir-Blodgett method) to produce a range of nanocomposites, multilayer nanofilms, and core-shell nanoarchitectures, which have great potential for electronic, magnetic, optical, photochemical, and catalytic applications.

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“…Dispersion of nanoparticles over layered materials is achieved by using delaminated layers as some reports emphasize on twodimensional layers being used as building blocks to composites through various solution-phase processes (Ma and Sasaki 2010). Delamination or exfoliation of smectites (Walker 1960) and various other layered solids such as chalcogenides (Lerf and Schöllhorn 1977), metal phosphonates (Yamamoto et al 2001), layered metal oxides (Nazar et al 1991), layered double hydroxide (LDH) (Pagano et al 2000), a-metal hydroxides (Nethravathi et al 2005) and layered hydroxy salts (Rajamathi et al 2005) M 0 = Al 3? , Cr 3?…”

Section: Introductionmentioning

confidence: 99%

Mg/Al layered double hydroxide-Pt nanoparticle composite by delamination-restacking route

Nityashree¹,

Menezes²

2012

Appl Nanosci

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Platinum nanoparticle intercalated magnesiumaluminum layered double hydroxide (LDH) composite was prepared by restacking the colloidal dispersion of organically modified LDH in the presence of preformed oleylamine capped platinum nanoparticles in n-butanol. The resultant nanocomposite was characterized using powder X-ray diffraction (PXRD), infrared (IR) spectroscopy, transmission electron microscopy (TEM), selected area electron diffraction and energy dispersive X-ray spectroscopy (EDX). The PXRD pattern of the composite indicates an expanded interlayer due to the intercalation of the Ptnanoparticles into the LDH interlayer region. PXRD patterns along with the IR spectra confirm the formation of the precursors and the composite. TEM image of Pt-nanoparticles shows spherical particles with an average particle size of *3 nm and that of the composite shows dispersed Pt-nanoparticles on the LDH matrix. The presence of Pt, Mg and Al in the composite is indicated in the EDX data.

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Aluminum and gallium oxide-pillared molybdenum oxide (MoO3)

Cited by 49 publications

References 0 publications

Intercalation of polyoxycation species into conducting layered host lattices of molybdenum trioxide and tantalum disulfide

Intercalation of polyoxycation species into conducting layered host lattices of molybdenum trioxide and tantalum disulfide

Nanosheets of Oxides and Hydroxides: Ultimate 2D Charge‐Bearing Functional Crystallites

Mg/Al layered double hydroxide-Pt nanoparticle composite by delamination-restacking route

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