In situ dielectric measurements of Zn-Al layered double hydroxide with anionic nitrate ions

被引：17

作者：

Ahmed, Abdullah Ahmed Ali ^{[1
]}

Talib, Zainal Abidin ^{[1
]}

bin Hussein, Mohd Zobir ^{[2
,3
]}

Zakaria, Azmi ^{[1
,3
]}

机构：

[1] Univ Putra Malaysia, Fac Sci, Dept Phys, Upm Serdang 43400, Selangor, Malaysia

[2] Univ Putra Malaysia, Fac Sci, Dept Chem, Upm Serdang 43400, Selangor, Malaysia

[3] Univ Putra Malaysia, Inst Adv Technol ITMA, Adv Mat & Nanotechnol Lab, Upm Serdang 43400, Selangor, Malaysia

来源：

SOLID STATE SCIENCES | 2012年 / 14卷 / 08期

关键词：

Zn-Al layered double hydroxide; Co-precipitation method; Dielectric spectroscopy; Activation energy; WATER; CONDUCTIVITY; FLUCTUATIONS; CLAYS;

D O I：

10.1016/j.solidstatesciences.2012.06.007

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Zn-Al-NO3 layered double hydroxide (Zn-Al-NO3-LDH) was prepared by the co-precipitation method with a ratio of Zn/Al = 4 and at a constant pH of 7. Powder XRD patterns showed the characteristic peaks of layered structure of the LDH sample. Thermogravimetric analysis (TGA) and infrared spectra of the sample were investigated. Because of the existence of water molecules and anionic NO3- in the interlayer of the LDH, the in situ dielectric spectroscopy of the LDH can be described by an anomalous low frequency dispersion using the second type of Universal Power Law. Novel measurements of activation energy of LDH have been obtained at five different frequencies. The energy value increased from 0.05 eV at 1 MHz to 0.37 eV at 134 Hz. The conductivity spectra of sample were studied as a function in temperature of the in situ measurements. The ionic conductivity (dc) of LDH increased as the in situ temperature increased. (C) 2012 Elsevier Masson SAS. All rights reserved.

引用

页码：1196 / 1202

页数：7

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