A FTIR SPECTROSCOPIC STUDY OF SURFACE-ACIDITY AND BASICITY OF MIXED MG, AL-OXIDES OBTAINED BY THERMAL-DECOMPOSITION OF HYDROTALCITE

被引：56

作者：

DELARCO, M ^{[1
]}

MARTIN, C ^{[1
]}

MARTIN, I ^{[1
]}

RIVES, V ^{[1
]}

TRUJILLANO, R ^{[1
]}

机构：

[1] UNIV SALAMANCA,FAC FARM,DEPT QUIM INORGAN,E-37007 SALAMANCA,SPAIN

来源：

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY | 1993年 / 49卷 / 11期

关键词：

D O I：

10.1016/0584-8539(93)80114-P

中图分类号：

O433 [光谱学];

学科分类号：

0703 ; 070302 ;

摘要：

A hydrotalcite with a Mg:Al ratio of 2.5:1 has been synthetized and characterized. The solids obtained upon calcination of this material at 770 and 1023 K have been also characterized, and have been found to be a mixture of MgAl2O4 and MgO. Surface acidity and basicity of the solid calcined at 1023 K have been assessed by FTIR monitoring of pyridine and formic acid adsorption. It has been found that the surface is not acid, although a residual acidity, larger than that in pure MgO, exists. Adsorption of formic acid takes place dissociatively on surface, isolated hydroxyl groups, contrary to previous results with MgO, where dissociative adsorption took place through interaction with exposed oxide ions.

引用

页码：1575 / 1582

页数：8

共 29 条

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