Manganese oxide nanostructures: low-temperature selective synthesis and thermal conversion

Abstract

γ-MnOOH nanorods, δ-MnO2 nanosheets, α-Mn2O3 nanocubes, and Mn3O4 nanoparticles were selectively prepared via a facile, high-yield and low-temperature reduction route.

Hydrothermal synthesis of γ-MnOOH nanorods and their conversion to MnO2, Mn2O3, and Mn3O4 nanorods

“…Therefore, many studies have been done to develop various methods for the synthesis of manganese oxide nanostructures. Up to now, manganese oxide nanostructures in the shapes of nanorods/nanowires [21,22], nanoparticles [23], nanotubes [24], nanoflowers [25,26], nanobundles [27], nanosheets [28], and other structures [29,30] [38], and MnO 2 [39] have been demonstrated to be effective precursors to synthesize manganese oxides. However, there are few people reported the formation mechanism of single-crystal γ-MnOOH nanorods and further study on their thermal conversion into various manganese oxide nanorods is needed.…”

Fe(ii) and Mn(ii) removal by Ca(ii)–manganite (γ-MnOOH)-modified red mud granules in water

“…This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence.shows that the shape of g-MnOOH is nanorod. This demonstrates that the RMG particles loaded with g-MnOOH on the surface and a large number of rod-shaped g-MnOOH are arranged crosswise on the surface of the ceramic lter material and in the macropores [30][31][32]. Fig.…”

Facile Synthesis of γ‐MnOOH Nanorods via a Redox Precipitation Route Using Oxygen and Their Thermal Conversion

“…Lan et al. synthesized bundle‐like γ‐MnOOH nanorods by a redox‐precipitation process, in which Mn(CH 3 COO) 2 was oxidized and deposited by a mixed solution of NaOH and H 2 O 2 . Few studies were attempted to prepared γ‐MnOOH with O 2 as an oxidant, even though it is ubiquitous and more desirable from the standpoint of green chemistry.…”