Nanocrystalline todorokite-like manganese oxide produced by bacterial catalysis.

Todorokite-type manganese oxide nanowires as an intercalation cathode for Li-ion and Na-ion batteries

Formation of todorokite from “c-disordered” H+-birnessites: the roles of average manganese oxidation state and interlayer cations

BACKGROUND Todorokite, a 3 × 3 tectomanganate, is one of three main manganese oxide minerals in marine nodules and can be used as an active MnO6 octahedral molecular sieve. The formation of todorokite is closely associated with the poorly crystalline phyllomanganates in nature. However, the effect of the preparative parameters on the transformation of "c-disordered" H(+)-birnessites, analogue t...

Crystalline todorokite associated with biogenic debris in manganese nodules.

Platy intergrowths of crystalline todorokite are associated with biogenic debris in the cores of manganese nodules from a site in the Pacific Ocean. Analyses by electron diffraction and transmission electron microscopy demonstrate that this material is composed of tunnels of chains of linked MnO(6) octahedra. The chemical composition, morphology, and stability of the todorokite differ from thos...

Synthesis of todorokite-type manganese oxide from Cu-buserite by controlling the pH at atmospheric pressure

1387-1811/$ see front matter 2008 Elsevier Inc. A doi:10.1016/j.micromeso.2008.06.006 * Corresponding author. E-mail address: [email protected] (F. Liu). A todorokite-type manganese oxide molecular sieve material was successfully synthesized at atmospheric pressure by refluxing treatment of Cu exchanged Na-buserite (named as Cu-OMS-1). TEM (transmission electron microscope) and HRTEM (hig...

Single-step synthesis of manganese oxide octahedral molecular sieves with large pore sizes.

A facile single-step method was developed for synthesizing todorokite-type manganese oxide octahedral molecular seieves (OMS-1) and 2 x 4 tunnel structured manganese oxide (OMS-5) materials. Selection of starting materials and initial pH conditions in the syntheses are crucial.