Intercalation of α,ω-Diaminoalkanes in the Interlayer Space of the Protonated Form of the Layered Perovskite H1.8Bi0.2Sr0.8Ta2O7

2006 ◽  
Vol 35 (11) ◽  
pp. 1292-1293 ◽  
Author(s):  
Seiichi Tahara ◽  
Takashi Yamashita ◽  
Go Kajiwara ◽  
Yoshiyuki Sugahara
Keyword(s):  
Interlayer Space ◽  
Protonated Form ◽  
Layered Perovskite

scholarly journals Protonated Forms of Layered Perovskite-Like Titanate NaNdTiO4: Neutron and X-ray Diffraction Structural Analysis

Solids ◽  
2021 ◽  
Vol 2 (3) ◽  
pp. 265-277
Author(s):  
Oleg I. Silyukov ◽  
Sergey A. Kurnosenko ◽  
Iana A. Minich ◽  
Ivan A. Rodionov ◽  
Irina A. Zvereva
Keyword(s):  
Interlayer Space ◽  
Low Frequency ◽  
Protonated Form ◽  
The Other ◽  
Layered Perovskite ◽  
X Ray Diffraction ◽  
X Ray ◽  
Sodium Cations ◽  
Protonated Forms ◽  
Oxygen Atoms

Structures of partially and completely protonated Ruddlesden–Popper phases, H0.7Na0.3NdTiO4·0.3H2O and HNdTiO4, have been established by means of neutron and X-ray diffraction analysis and compared among themselves as well as with that of the initial titanate NaNdTiO4. It was shown that while interlayer sodium cations in the partially protonated form are coordinated by nine oxygen atoms, including one related to intercalated water, in the fully protonated compound the ninth oxygen proves to be an axial anion belonging to the opposite slab of titanium-oxygen octahedra. Moreover, the partially protonated titanate was found to significantly differ from the other two in the octahedron distortion pattern. It is characterized by a weakly pronounced elongation of the octahedra towards the Nd-containing interlayer space making Ti4+ cations practically equidistant from both axial oxygen atoms, which is accompanied by a low-frequency shift of the bands relating to the asymmetric stretching mode of axial Ti–O bonds observed in the Raman spectra.

ChemInform Abstract: Preparation and HREM Characterization of Protonated Form of a Layered Perovskite Tantalate from an Aurivillius Phase Bi2SrTa2O9 via Acid Treatment.

ChemInform ◽  
2010 ◽  
Vol 32 (52) ◽  
pp. no-no
Author(s):  
Yu Tsunoda ◽  
Masashi Shirata ◽  
Wataru Sugimoto ◽  
Zheng Liu ◽  
Osamu Terasaki ◽  
...  
Keyword(s):  
Acid Treatment ◽  
Protonated Form ◽  
Layered Perovskite ◽  
Aurivillius Phase

Polymerizable Complex Synthesis of Protonated Form of Layered Perovskite K0.5La0.5Bi2Ta2O9 for Water Splitting into Hydrogen

2012 ◽  
Vol 28 (12) ◽  
pp. 2911-2916 ◽  
Author(s):  
CHEN Wei ◽  
◽  
◽  
GAO Han-Yang ◽  
YANG Yu ◽  
...  
Keyword(s):  
Water Splitting ◽  
Protonated Form ◽  
Layered Perovskite

Conversion of an Aurivillius Phase Bi2SrNaNb3O12 into Its Protonated Form via Treatment with Various Mineral Acids

2000 ◽  
Vol 658 ◽  
Author(s):  
Masashi Shirata ◽  
Yu Tsunoda ◽  
Wataru Sugimoto ◽  
Yoshiyuki Sugahara
Keyword(s):  
Layered Structures ◽  
Protonated Form ◽  
Layered Perovskite ◽  
Aurivillius Phase ◽  
Experimental Conditions ◽  
Mineral Acids ◽  
Acid Treatments

ABSTRACTA protonated form of a layered perovskite was prepared from an Aurivillius phase Bi2SrNaNb3O12via acid treatments, and the effect of the type of mineral acids was investigated. The treatment with HX (X = Cl, Br, I) resulted in the formation of a protonated form H1.8[Sr0.8Bi0.2NaNb3O10], while no reactions were observed for HNO3 and H2SO4 under the present experimental conditions. All the products obtained by HX-treatments exhibited layered structures and the structures of the perovskite-like slabs were preserved.

scholarly journals Photocatalytic Activity of n-Alkylamine and n-Alkoxy Derivatives of Layered Perovskite-like Titanates H2Ln2Ti3O10 (Ln = La, Nd) in the Reaction of Hydrogen Production From an Aqueous Solution of Methanol

Catalysts ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 1279
Author(s):  
Sergei Kurnosenko ◽  
Vladimir Voytovich ◽  
Oleg Silyukov ◽  
Ivan Rodionov ◽  
Sergei Kirichenko ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Photocatalytic Activity ◽  
Hydrogen Production ◽  
Interlayer Space ◽  
Pt Nanoparticles ◽  
Layered Compounds ◽  
Layered Perovskite ◽  
Organic Components ◽  
Apparent Quantum Efficiency ◽  
Alkoxy Groups

Two series of hybrid inorganic-organic derivatives, obtained via the modification of protonated Ruddlesden–Popper phases H2Ln2Ti3O10 (Ln = La, Nd) with intercalated n-alkylamines and grafted n-alkoxy groups, have been systematically investigated in relation to photocatalytic hydrogen production from a model of 1 mol % aqueous solution of methanol for the first time. Photocatalytic measurements were performed both for bare samples and for their composites with Pt nanoparticles as a cocatalyst using an advanced scheme, including dark stages, monitoring of the volume concentration of the sample in the reaction suspension during the experiment, shifts of its pH and possible exfoliation of layered compounds into nanolayers. It was found that the incorporation of organic components into the interlayer space of the titanates increases their photocatalytic activity up to 117 times compared with that of the initial compounds. Additional platinization of the hybrid samples’ surface allowed for achieving apparent quantum efficiency of hydrogen evolution of more than 40%. It was established that the photocatalytic activity of the hybrid samples correlates with the hydration degree of their interlayer space, which is considered a separate reaction zone in photocatalysis, and that hydrogen indeed generates from the aqueous methanol solution rather than from organic components of the derivatives.

Preparation and HREM Characterization of a Protonated Form of a Layered Perovskite Tantalate from an Aurivillius Phase Bi2SrTa2O9via Acid Treatment

2001 ◽  
Vol 40 (23) ◽  
pp. 5768-5771 ◽  
Author(s):  
Yu Tsunoda ◽  
Masashi Shirata ◽  
Wataru Sugimoto ◽  
Zheng Liu ◽  
Osamu Terasaki ◽  
...  
Keyword(s):  
Acid Treatment ◽  
Protonated Form ◽  
Layered Perovskite ◽  
Aurivillius Phase
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