Synthesis and characterization of cryptomelane- and birnessite-type oxides:: Precursor effect

被引：57

作者：

Frias, D.

Nousir, S.

Barrio, I.

Montes, M.

Lopez, T.

Centeno, M. A.

Odriozola, J. A.

机构：

[1] Univ Basque Country, Dept Appl Chem, San Sebastian 20080, Spain

[2] Univ Autonoma Metropolitana Iztapalapa, Dept Chem, Mexico City 09340, DF, Mexico

[3] Univ Seville, CSIC, Ctr Mixto, Inst Ciencia Mat Sevilla, Seville 41092, Spain

来源：

MATERIALS CHARACTERIZATION | 2007年 / 58卷 / 8-9期

关键词：

manganese oxide; catalytic combustion; octahedral layer; octahedral molecular sieve;

D O I：

10.1016/j.matchar.2006.11.005

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Manganese oxide, systems were prepared in the form of laminar octahedral compounds (birnessites) or octahedral molecular sieves (cryptomelanes) in order to test their efficiency as catalysts for the abatement of volatile organic compounds. Gelation routes and redox-reflux methods with different precursors were chosen such as KMnO4/glucose, KMnO4/polyvinyl. alcohol for bimessites and KMnO4/Mn-oxalate, KMnO4/Mn-sulphate and KMnO4/Mn-acetate for cryptomelanes. Birnessite, prepared using glucose as the reducing agent, showed a high activity in the total oxidation of acetone in spite of the moderate surface area. Cryptomelanes, prepared from Manganese carboxylates, present the classical fibrous morphology with a high surface area and were extremely active for acetone total oxidation. (C) 2006 Elsevier Inc. All rights reserved.

引用

页码：776 / 781

页数：6

共 9 条

[1] New redox deposition-precipitation method for preparation of supported manganese oxide catalysts [J].