COMPOSITION, STRUCTURE AND SURFACE ACID-BASE BEHAVIOR OF MANGANESE OXIDE DISPERSED ON SILICA

被引：14

作者：

ZAKI, MI ^{[1
]}

NOHMAN, AKH ^{[1
]}

HUSSEIN, GAM ^{[1
]}

NASHED, YE ^{[1
]}

机构：

[1] MENIA UNIV,FAC SCI,DEPT CHEM,MENIA 61519,EGYPT

来源：

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 1995年 / 99卷 / 2-3期

关键词：

ACID-BASE BEHAVIOR; MANGANESE OXIDE; SILICA;

D O I：

10.1016/0927-7757(95)03151-3

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Silica-supported manganese oxides were derived by calcination at 870 and 1270 K of manganese nitrate-impregnated and manganese oxide-coated silicas (at 10 wt.%Mn). Characterization of the products was carried out by X-ray powder diffraction, volumetric analysis of nitrogen adsorption at 77 K, and infrared spectroscopy of pyridine adsorption at 300-670 K. The results indicate that the impregnated silicas evolve highly accessible surfaces dispersing non-crystalline MnOx and Mn2SiO4-like species, and consequently expose strong Lewis and Bronsted acid sites. Thus, the potential activity of these materials in acid-catalyzed reactions is implied.

引用

页码：247 / 253

页数：7

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