Incorporation of Low-dimensional Materials into the Two-dimensional Interlamellar Nanospace of a Pillared Interlayered Solid

Abstract

We studied the synthesis of nanostructured oxide/hydroxide within the two-dimensional nanospace of a pillared interlayered solid (alumina-pillared clay). A nickel(II) hydroxide unit layer was introduced into the pore of the pillared clay by adding a base to a nickel(II) nitrate solution containing the pillared clay calcined over 300 °C. The formation of the lowdimensional nickel(II) hydroxide was evaluated by X-ray diffraction analysis, elemental analysis, surface area measurements, temperature-programmed reduction measurements, and X-ray photoelectron spectroscopy measurements. In situ growth of nanostructured NiO in the pores was performed by the heat treatment of the intracrystalline nickel(II) hydroxide. The Ni 2p binding energy of the intracrystalline nickel(II) hydroxide was the same as that of bulk nickel(II) hydroxide. However, the intracrystalline NiO had a Ni 2p binding energy ca. 2-3 eV higher than that of bulk NiO. These phenomena were rationalized in terms of the structure of the pores of the pillared clay and the structures of nickel(II) hydroxide and NiO. The intracrystalline nickel(II) hydroxide was less reducible than bulk nickel(II) hydroxide; Ni metal was afforded outside the pores upon reduction in hydrogen at 500 °C.

Effect of Al13 Polycation Grafting on Apple Wastes Activated Carbon That Have A Porous Structure

“…Using this standard method, the resulting solution will contain 90-95 % of the polycation Al 13 . In fact, many studies using the nuclear magnetic resonance spectroscopy (NMR), provided the proof of its existence and allowed the aluminum speciation [40][41][42][43][44][45][46] .…”

“…Activated carbons were prepared from modified apple wastes-Al 13 by pyrolysis under nitrogen flow and activation under water vapour. Pyrolysis of the grafted material was carried out Passing to the pyrolysis step, about 10 g of dried apple wastes-Al 13 (40,60 and 80 wt. %) were placed in the middle of the reactor .we used different pyrolysis temperatures of 400,500,600, 700 and 800 °C.…”

“…After activation, the model was cooled to ambient temperature under N 2 flow rate. The received activated carbons are indicated AAW-Al 13 40 %, AAW-Al 13 60 %, AAW-Al 13 80 %.…”

Tb3+and Ce3+Intercalated Laponite Powder: The Influence of Ce3+Ions on Thermal Stability and Optical Properties of Tb3+Intercalated Laponite

“…[1][2][3][4][5] The alkali metal and alkaline earth ions in the interlayer space of the smectites can be replaced by ion exchange method with a variety of desired cations. The ability of smectite clay to adsorb both inorganic and organic materials gives novel functional organic/inorganic hybrid materials.…”

“…Laponite is a synthetic polycrystalline similar in structure and composition to natural hectorite of the smectite group. 6 The empirical composition of laponite is Na 0.7 [(Si 8 Mg 5.5 Li 0.3 )O 20 (OH) 4 ]. Rare-earth-ion-doped inorganic compounds have been utilized in luminescent devices such as fluorescent lamps, cathode ray tubes, plasma display panels (PDPs), light emitting diodes, scintillators and amplifiers for fiber-optic communication.…”