Hydrothermal synthesis of Mg-Al hydrotalcites by urea hydrolysis

被引：159

作者：

Rao, MM ^{[1
]}

Reddy, BR ^{[1
]}

Jayalakshmi, M ^{[1
]}

Jaya, VS ^{[1
]}

Sridhar, B ^{[1
]}

机构：

[1] Indian Inst Chem Technol, Inorgan Chem Div, Hyderabad 500007, Andhra Pradesh, India

来源：

MATERIALS RESEARCH BULLETIN | 2005年 / 40卷 / 02期

关键词：

layered compounds; chemical synthesis; infrared spectroscopy;

D O I：

10.1016/j.materresbull.2004.10.007

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report a simple method to prepare hydrotalcites involving both urea hydrolysis and hydrothermal synthetic conditions. Out of a series of Mg/Al ratios tried, pure hydrotalcite like phase was obtained for Mg/Al ratios of 1: 1 and 2:1. Unlike in conventional co-precipitation method we succeeded in preparing Mg/Al ratio of 1: 1 by this route. The high temperature (180 degreesC) applied and pressure developed in the autoclave during the synthesis might have altered the topochemical transformation. The materials were characterized by X-ray diffraction, X-ray photoelectron spectroscopy, Fourier transform infrared, thermo gravimetric and differential thermal analysis and transmission electron microscopy. (C) 2004 Elsevier Ltd. All rights reserved.

引用

页码：347 / 359

页数：13

共 21 条

[11] Fourier transform infrared and Raman spectroscopic study of the local structure of Mg-, Ni-, and Co-hydrotalcites [J].

Kloprogge, JT ;

Frost, RL .

JOURNAL OF SOLID STATE CHEMISTRY, 1999, 146 (02) :506-515

[12] NEW NI-AL-CR AND NI-AL-FE CARBONATE HYDROTALCITE-LIKE COMPOUNDS - SYNTHESIS AND CHARACTERIZATION [J].

KOOLI, F ;

KOSUGE, K ;

TSUNASHIMA, A .

JOURNAL OF SOLID STATE CHEMISTRY, 1995, 118 (02) :285-291

[13] NEW SYNTHESIS AND CHARACTERIZATION OF MAGNESIUM-ALUMINUM HYDROXIDES [J].

MASCOLO, G ;

MARINO, O .

MINERALOGICAL MAGAZINE, 1980, 43 (329) :619-621

[14] Homogeneous precipitation of uniform hydrotalcite particles [J].

Ogawa, M ;

Kaiho, H .

LANGMUIR, 2002, 18 (11) :4240-4242

[15] The effect of synthetic conditions on tailoring the size of hydrotalcite particles [J].

Oh, JM ;

Hwang, SH ;

Choy, JH .

SOLID STATE IONICS, 2002, 151 (1-4) :285-291

[16] Synthesis and characterization of the layered double hydroxides of Mg with Cr [J].

Prakash, AS ;

Kamath, PV ;

Hegde, M .

MATERIALS RESEARCH BULLETIN, 2000, 35 (13) :2189-2197

[17] Synthesis and characterization of sol-gel Mg/Al and Ni/Al layered double hydroxides and comparison with co-precipitated samples [J].

Prinetto, F ;

Ghiotti, G ;

Graffin, P ;

Tichit, D .

MICROPOROUS AND MESOPOROUS MATERIALS, 2000, 39 (1-2) :229-247

[18] Urea hydrolysis of cobalt(II) nitrate melts: synthesis of novel hydroxides and hydroxynitrates [J].

Rajamathi, M ;

Kamath, PV .

INTERNATIONAL JOURNAL OF INORGANIC MATERIALS, 2001, 3 (07) :901-906

[19] KINETIC STUDIES OF THIOUREA DERIVATIVES .4. THE METHYLATED THIOUREAS - CONCLUSIONS [J].

SHAW, WHR ;

WALKER, DG .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1958, 80 (20) :5337-5342

[20] THE QUANTITY OF REDUCED NICKEL IN SYNTHETIC TAKOVITE - EFFECTS OF PREPARATION CONDITIONS AND CALCINATION TEMPERATURE [J].

TITULAER, MK ;

JANSEN, JBH ;

GEUS, JW .

CLAYS AND CLAY MINERALS, 1994, 42 (03) :249-258

← 1 2 3 →