IN SITU HIGH TEMPERATURE FT-IR STUDY OF THE INTERLAYER NAPHTHALENE-2,6-DISULFONATE IN Mg AND Al LAYERED DOUBLE HYDROXIDE

In high temperature in situ FT-IR (HTFTIR) spectra of Mg and Al layered double hydroxide with interlayer naphthalene-2,6-disulfonate ( Mg / Al / N 26 DS - LDH ), one S - O stretching vibration band of the non-coordinating - SO 3 group in the interlayer N 26 DS dianion is observed below 400 °C at 1035 cm-1 with keeping intensity. High temperature in situ X-ray diffraction (HTXRD) indicates that the basal spacing remains also constant up to 400 °C, MgSO 4 appears after the LDH collapses at 500 °C and some metal oxides are formed at higher temperature. Both results in HTXRD and HTFTIR indicate that the layered structure in this LDH is stable against heating up to 400 °C.

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Comment on “Direct Observation of a Metastable Solid Phase of Mg/Al/CO3-Layered Double Hydroxide by Means of High-Temperature in Situ Powder XRD and DTA/TG”1

Inorganic Chemistry ◽

10.1021/ic980739y ◽

1999 ◽

Vol 38 (2) ◽

pp. 406-407 ◽

Cited By ~ 39

Author(s):

Vicente Rives

Keyword(s):

High Temperature ◽

Layered Double Hydroxide ◽

Direct Observation ◽

Solid Phase ◽

Powder Xrd ◽

Double Hydroxide ◽

Metastable Solid Phase

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Studies on the intercalation of naproxen into layered double hydroxide and its thermal decomposition by in situ FT-IR and in situ HT-XRD

Journal of Solid State Chemistry ◽

10.1016/j.jssc.2004.03.041 ◽

2004 ◽

Vol 177 (7) ◽

pp. 2534-2541 ◽

Cited By ~ 77

Author(s):

Min Wei ◽

Shuxian Shi ◽

Ji Wang ◽

Yong Li ◽

Xue Duan

Keyword(s):

Thermal Decomposition ◽

Layered Double Hydroxide ◽

Ft Ir ◽

Double Hydroxide

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Studies on the intercalation of naproxen into layered double hydroxide and its thermal decomposition by in situ FT-IR and in situ HT-XRD

Journal of Solid State Chemistry ◽

10.1016/s0022-4596(04)00143-4 ◽

2004 ◽

Author(s):

M WEI

Keyword(s):

Thermal Decomposition ◽

Layered Double Hydroxide ◽

Ft Ir ◽

Double Hydroxide

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FT-IR Study of the Imidization Process of Photosensitive Polyimide PMDA/ODA

Applied Spectroscopy ◽

10.1366/0003702981944625 ◽

1998 ◽

Vol 52 (7) ◽

pp. 985-989 ◽

Cited By ~ 34

Author(s):

W. S. Li ◽

Z. X. Shen ◽

J. Z. Zheng ◽

S. H. Tang

Keyword(s):

Fourier Transform ◽

Infrared Spectroscopy ◽

High Temperature ◽

Film Thickness ◽

Cure Process ◽

Cure Reaction ◽

Ft Ir ◽

Lower Temperature ◽

Ir Study

Fourier transform infrared spectroscopy (FT-IR) was used to study the cure reaction process of an ester-type photosensitive polyimide, PMDA/ODA films coated on silicon wafer substrates. In the in situ high-temperature FT-IR study carried out in vacuum, all the characteristic peaks of imide and the crosslinkable group were observed to decrease gradually with an increase in temperature. The completion of the imidization reaction is at ∼270 °C. Our result shows that the ester-type photosensitive polyimide can be cured at a much lower temperature than previously reported. The imide peak δas(C, C > NC) at 588 cm−1 was used to follow the imidization process, and the result agrees well with that obtained by using another imide peak v(C–N–C) at 1378 cm−1. The film shrinks by one third during the cure process, and the temperature dependence of the film thickness shows excellent agreement with the “imidization degree”.

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Effect of Atomic Ratio Mg/Al in Layers of Mg and Al Layered Double Hydroxide on Thermal Stability of Hydrotalcite-Like Layered Structure BY Means of In Situ High Temperature Powder X-Ray Diffraction

Materials Research Bulletin ◽

10.1016/s0025-5408(98)00021-x ◽

1998 ◽

Vol 33 (5) ◽

pp. 773-778 ◽

Cited By ~ 38

Author(s):

E Kanezaki

Keyword(s):

Thermal Stability ◽

High Temperature ◽

Layered Double Hydroxide ◽

Layered Structure ◽

Atomic Ratio ◽

X Ray Diffraction ◽

X Ray ◽

Double Hydroxide ◽

Thermal Stability Of

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Physicochemical Characterization of the Magnetic Fe3O4/MO-Intercalated-Layered Double Hydroxide Composite

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.734-737.2168 ◽

2013 ◽

Vol 734-737 ◽

pp. 2168-2171

Author(s):

Dan Chen ◽

Xiao Long Ma ◽

Yang Li

Keyword(s):

Layered Double Hydroxide ◽

Physicochemical Characterization ◽

Basal Spacing ◽

X Ray Diffraction ◽

Exchange Method ◽

Microwave Hydrothermal ◽

Ft Ir ◽

Double Hydroxide ◽

Ft Ir Spectroscopy

A new magnetic Fe3O4/MO-intercalated-LDH composite has been synthesized by combination of Fe3O4, layered double hydroxide (LDH) and methyl orange (MO). Fe3O4/Zn2CrLDH and Fe3O4/MO-intercalated-LDH were obtained via two-step microwave hydrothermal and anion exchange method. X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectroscopy and vibrating sample magnetometer (VSM) were conducted to characterize the as-prepared samples. The latter exhibited that basal spacing of Zn2Cr-LDH is 1.18 nm. The value of saturation magnetization (Ms) is 20.5 emu/g. In addition, the amounts of adsorbed MO reached 1.54 mmol/g. Therefore, the material shows several advantages for the removal of pollutants.

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