Synthesis and characterization of the SnO2-pillared layered titanate nanohybrid

Ko, Ji Eun; Kwon, Bob Jin; Jung, Hyun Suk

doi:10.1016/j.jpcs.2009.12.060

Cited by 2 publications

(1 citation statement)

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“…Figure shows the X-ray diffraction (XRD) patterns of the investigated samples that are all characteristics of the lepidocrocite-type cesium titanate ( Immm ). The 011 reflection (× in Figure ) typically overlaps with the 060 reflection in the □-containing sample Cs x TO ( x = 0.70 or 0.67), which is in agreement with the report by Grey et al Upon substitution of Zn for Ti in Cs 0.7 ZnTO, these two peaks are clearly separated; this finding is also consistent with the calculated XRD pattern reported by Gao et al Table lists the corresponding unit cell parameters, which agree reasonably with the reported values. ,,, (The differences might be due to small variations in stoichiometries from different laboratories.) Taking Cs 0.7 TO as an example, we used CellCalc to determine the following unit cell parameters: a = 3.815(4) Å, b = 17.46(2) Å, and c = 2.961(6) Å, with an interlayer spacing d 020 (= b /2) of ∼8.6 Å.…”

Section: Resultssupporting

confidence: 91%

An Unusually Acidic and Thermally Stable Cesium Titanate Cs_xTi_2–yM_yO₄ (x = 0.67 or 0.70; M = vacancy or Zn)

et al. 2019

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Proton-free, alkali-containing layered metal oxides are thermally stable compared to their protonic counterparts, potentially allowing catalysis by Lewis acid sites at elevated temperatures. However, the Lewis acidic nature of these materials has not been well explored, as alkali ions are generally considered to promote basic but to suppress acidic character. Here, we report a rare example of an unusually acidic cesium-containing oxide Cs x Ti 2−y M y O 4 (x = 0.67 or 0.70; M = Ti vacancy □ or Zn). These lepidocrocitetype microcrystals desorbed NH 3 at >400 °C with a total acidity of ≲410 μmol g −1 at a specific surface area of only 5 m 2 g −1 , without the need for lengthy proton−ion exchange, pillaring, delamination, or restacking. The soft and easily polarized Cs + ion essentially drives the formation of the Lewis acidic site on the surfaces as suggested by IR of sorbed pyridine. The twodimensional layered structure was preserved after the oxide was employed in the ethanol conversion at 380 °C, the temperature at which the protonic form could have converted to anatase. The structure was also retained after the NH 3 temperatureprogrammed desorption measurement up to 700 °C. The production of ethylene from ethanol, well-known to occur over acid sites, unambiguously confirmed the acidic nature of this cesium titanate.

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Section: Resultssupporting

confidence: 91%

An Unusually Acidic and Thermally Stable Cesium Titanate Cs_xTi_2–yM_yO₄ (x = 0.67 or 0.70; M = vacancy or Zn)

et al. 2019

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Rapid Exfoliation of H2o2-Intercalated Layered Titanate and Visible-Photocatalytic Hydrogen Production Performance of Exfoliated Nanosheet

Kong

Zhang

et al. 2022

SSRN Journal

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Synthesis and characterization of the SnO2-pillared layered titanate nanohybrid

Cited by 2 publications

References 15 publications

An Unusually Acidic and Thermally Stable Cesium Titanate Cs_xTi_2–yM_yO₄ (x = 0.67 or 0.70; M = vacancy or Zn)

An Unusually Acidic and Thermally Stable Cesium Titanate Cs_xTi_2–yM_yO₄ (x = 0.67 or 0.70; M = vacancy or Zn)

Rapid Exfoliation of H2o2-Intercalated Layered Titanate and Visible-Photocatalytic Hydrogen Production Performance of Exfoliated Nanosheet

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Synthesis and characterization of the SnO2-pillared layered titanate nanohybrid

Cited by 2 publications

References 15 publications

An Unusually Acidic and Thermally Stable Cesium Titanate CsxTi2–yMyO4 (x = 0.67 or 0.70; M = vacancy or Zn)

An Unusually Acidic and Thermally Stable Cesium Titanate CsxTi2–yMyO4 (x = 0.67 or 0.70; M = vacancy or Zn)

Rapid Exfoliation of H2o2-Intercalated Layered Titanate and Visible-Photocatalytic Hydrogen Production Performance of Exfoliated Nanosheet

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An Unusually Acidic and Thermally Stable Cesium Titanate Cs_xTi_2–yM_yO₄ (x = 0.67 or 0.70; M = vacancy or Zn)

An Unusually Acidic and Thermally Stable Cesium Titanate Cs_xTi_2–yM_yO₄ (x = 0.67 or 0.70; M = vacancy or Zn)