... synthesis of beta-MnO2 nanorods and their rapid and efficient catalytic oxidation of methylene blue dye. Catal Commun 2006, 7:408-412. 22. Zhang WX, Wang H, Yang ZH, Wang F: Promotion of ... features of the birnessite-type MnO2 compounds previously reported at 500 to 510, 575 to 585, and 625 to 650 cm−1 [40]. Three Raman bands for the birnessite-type MnO2 and three Raman bands for ... Lin2, and Li Lu*3 1School of Materials Science and Engineering, Nanjing University of Science and Technology, 200 Xiao Ling Wei, Nanjing, 210094, China 2Institute of Chemical and Engineering...