A Review of Porous Manganese Oxide Materials

Abstract

This review concerns the synthesis, characterization, and applications of porous manganese oxides during the last two years. The synthesis of porous tunnel structures, layered structures, and related materials is discussed. Both microporous and mesoporous systems materials are covered here. Characterization discussed here focuses around structural studies. The focus of the application sections include electrochemical and catalytic studies.

Birnessite nanorod-mediated decomposition of methylene blue with common oxidants

“…This is due to the quick hydrothermal process by the microwave irradiation. These mixed valence manganese oxide material are bound to act as a good catalyst for a number of organic oxidation reaction (Brock et al 1988;Suib 2008;Anipsitakis and Dionysiou 2004). Therefore, the BN material was employed for the decomposition of methylene blue dye.…”

“…It is widely known that hydrogen peroxide is not active at atmospheric temperature. Therefore, a number of methods have been reported, to activate the H 2 O 2 , including high temperature, metal activation, higher pH etc., (Furman et al 2009;Brock et al 1988) Among them, metal-activated peroxide exhibits better results for method destruction of organic molecules (Brock et al 1988). O 2 ) and this superoxide species subsequently degrades the dye molecules (Eqs.…”

“…The primary limitation of activated persulfate is the minimal knowledge of its reaction pathways in the subsurface. Manganese oxide with different structures have been widely studied due to their diverse physical and chemical properties, and they find extensive application in the field of catalysis, and batteries (Zhou et al 1998;Brock et al 1988;Suib 2008;Anipsitakis and Dionysiou 2004;Segal et al 1997) etc. Manganese oxide-mediated CHP is a field of great interest due to the high surface area and high stability (Furman et al 2009;Kitajima et al 1978;Zhou et al 1998;Watts and Teel 2006;Segal et al 1997).…”

Preparación y caracterización de óxidos de manganeso no estequiométricos

“…2.a corresponde a la muestra con sodio preparada por el método sol-gel. Debe señalarse que, de acuerdo con datos en la bibliografía (8,15), mientras que el difractograma de la birnesita de potasio preparada siguiendo el procedimiento indicado en el apartado 2.1.1 (es decir, la muestra aquí denominada SK), es similar al incluido en la Fig. 2.a, con un intenso pico estrecho próximo a 7 Å, en el caso de la síntesis por el procedimiento sol-gel de la birnesita sódica se obtienen dos fases, caracterizadas por picos próximos a 7 y 5.5 Å, este último ha sido asignado (15) a la presencia de una fase tipo birnesita, pero deshidratada en la región interlaminar, junto a la muestra hidratada, responsable del máximo de difracción próximo a 7 Å.…”

Selective Magnetic Evolution of MnxFe1–xO Nanoplates

“…[16][17][18] MnO has also been studied for energy conversion, such as an anode material for Li-ion batteries, [19][20][21] and even as the commercial Li-MnO batteries. FeO, however, is not broadly used primarily due to its metastable structure.…”