Manganese oxyhydroxide and oxide nanofibers for high efficiency degradation of organic pollutants.
Ultrathin MnOOH nanofibers were synthesized on a large scale from diluted Mn(NO(3))(2) aqueous solution at room temperature. These MnOOH nanofibers were shape-reservedly converted into Mn(3)O(4) and MnO(2) nanofibers by post-heat treatment in air at 400 °C and 600 °C for 1 h, respectively. The morphology and crystalline structures of the nanofibers were characterized by electronic microscopes and x-ray diffraction. These nanofibers had good crystalline structures. These nanofibers were in bundles with a diameter of 25 nm composed of 3-5 nm fine crystalline nanofibers. The Mn(3)O(4) nanofibers had a specific surface area of 71 m(2) g(-1) and demonstrated highly catalytic degradation of the organic pollutant methylene blue with the assistance of H(2)O(2) at room temperature.
State Key Laboratory of Silicon Materials, Department of Materials Science and Engineering, Zhejiang University, Hangzhou, People's Republic of China.
Xinsheng
X
Peng
Izumi
I
Ichinose