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Synthesis of Manganese Oxide Hollow Urchins with a Reactive Template of Carbon Spheres
Author(s) -
Wang Nan,
Gao Yu,
Gong Jian,
Ma Xinyan,
Zhang Xiaoli,
Guo Yihang,
Qu Lunyu
Publication year - 2008
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.200800236
Subject(s) - chemistry , transmission electron microscopy , manganese , scanning electron microscope , chemical engineering , carbon fibers , selected area diffraction , nanotechnology , manganese oxide , oxide , mesoporous material , materials science , catalysis , composite material , organic chemistry , composite number , engineering
In this paper, a novel route to synthesize manganese oxide (MnO 2 ) hollow urchins by a reactive template of carbon spheres is described. The formation process of the MnO 2 hollow urchins and the mechanism for the removal of the carbon spheres are suggested. The results of scanning electron microscopy and transmission electron microscopy indicate that MnO 2 shows a hollow‐urchin structure with an average diameter of 1.5 μm and with cavities that are about 250–500 nm in diameter. The X‐ray diffraction pattern indicates that the as‐prepared hollow urchins are γ‐MnO 2 . It has a highBrunauer–Emmett–Teller surface area of 110 m 2 g –1 and a mesoporous structure. In addition, the magnetic properties of the γ‐MnO 2 hollow urchins are investigated. This method opens a way to obtain different morphologies of metal oxides by changing the morphologies of the reactive carbon template. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)