Microwave frequency effects on synthesis of cryptomelane-type manganese oxide and catalytic activity of cryptomelane precursor

被引：85

作者：

Malinger, KA

Ding, YS

Sithambaram, S

Espinal, L

Gomez, S

Suib, SL

机构：

[1] Univ Connecticut, Dept Chem, Storrs, CT 06269 USA

[2] Univ Connecticut, Inst Sci Mat, Storrs, CT 06269 USA

来源：

JOURNAL OF CATALYSIS | 2006年 / 239卷 / 02期

基金：

美国国家科学基金会;

关键词：

cryptomelane; microwave heating; microwave frequency; catalytic oxidation;

D O I：

10.1016/j.jcat.2006.02.005

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：

Cryptomelane-type manganese oxides (OMS-2) were synthesized in the presence of microwave heating at different microwave frequencies and also using variable-frequency heating. The materials were prepared using a two-step hydrothermal procedure. Catalytic activity of the materials was tested for the oxidation of 2-thiophenemethanol. OMS-2 prepared at a high-frequency limit of 5.5 GHz showed the highest conversion (50%) to the 2-thiophenecarboxaldehyde among all of the tested OMS-2 samples. The OMS-2 precursor showed remarkable conversion (89%) in the oxidation reaction. In addition, the OMS-2 materials and the precursor showed differences in oxygen evolution based on the thermal decomposition experiments, as well as differences in porosity. (c) 2006 Elsevier Inc. All rights reserved.

引用

页码：290 / 298

页数：9

共 35 条

[1] Cerium incorporated ordered manganese oxide OMS-2 materials: Improved catalysts for wet oxidation of phenol compounds [J].