Well-Crystallized CO32--Type LiAl-LDH from Urea Hydrolysis of an Aqueous Chloride Solution

被引：22

作者：

Kang, Hongliang ^{[1
,2
]}

Leoni, Matteo ^{[3
]}

He, Hongmei ^{[1
]}

Huang, Gailing ^{[1
]}

Yang, Xiaojing ^{[1
]}

机构：

[1] Beijing Normal Univ, Coll Chem, Beijing 100875, Peoples R China

[2] Chinese Acad Sci, Inst Chem, State Key Lab Polymer Phys & Chem, Beijing Natl Lab Mol, Beijing 100190, Peoples R China

[3] Univ Trento, Dept Mat Engn & Ind Technol, I-38123 Trento, Italy

来源：

EUROPEAN JOURNAL OF INORGANIC CHEMISTRY | 2012年 / 24期

基金：

中国国家自然科学基金;

关键词：

Hydroxides; Crystallization; Urea; Hydrolysis; Imbibition; Layered compounds; Lithium; Hydrothermal synthesis; LAYERED DOUBLE HYDROXIDES; HYDROTALCITE-LIKE COMPOUNDS; X-RAY; ALUMINUM-HYDROXIDE; ANION-EXCHANGE; LITHIUM; DELAMINATION; DISORDER; MG/AL; NI;

D O I：

10.1002/ejic.201200174

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

An LiAllayered double hydroxide (LiAlLDH) was synthesized by autoclaving an aqueous solution of LiCl and AlCl3 with urea at 100160 degrees C. Chemical and structural analyses show the resulting powder to be pure and well-crystallized LiAl2(OH)6(CO3)0.5 center dot yH2O (1?<?y?<?2). X-ray powder diffraction reveals an apparent monoclinic C2/m symmetry and the presence of disorder in the arrangement of the layers. A detailed study of the reaction is also proposed, demonstrating that the LiAlLDH does not form by homogeneous precipitation, but is the result of a one-pot imbibition of the Al(OH)3 gel precursor by Li2CO3, favored by an increase in the pH.

引用

页码：3859 / 3865

页数：7