Synthesis and catalytic activity of Birnessite-Type Manganese Oxide synthesized by solvent-free method

2nd International Conference on Oleo and Petrochemical Engineering

Siregar, S.S.^1 ; Awaluddin, A.^1

Department of Chemistry, University of Riau, Kampus Bina Widya, Pekanbaru

28293, Indonesia^1

关键词: Crystallinities;    Hausmannites;    Low crystallinity;    Methylene Blue;    Minor components;    Octahedral layers;    Solvent-free method;    X-ray powder;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/345/1/012005/pdf
DOI  :  10.1088/1757-899X/345/1/012005

来源: IOP

【 摘 要 】

Redox reaction between KMnO4and glucose usingsolvent-free method produces the octahedral layer birnessite-type manganese oxide. The effects of mole ratios, temperatures, and calcinations time on the structures and crystallinity of the oxides were studied throughthe X-ray powder diffraction analysis. The mole ratio of KMnO4/glucose (1:3) produces the purebirnessite with low crystallinity, whereas the mole ratio of KMnO4/glucose (3:1) yields high crystalline birnessite with minor components of hausmannite-type manganese oxide.The increasing of the temperature and calcinations times (300-700 °C and 3-7 h, respectively) willimprove the crystallinity and the purity of the as-synthesized oxide. Further experiments also showed that the as-syntesized octahedral layer birnessite-type manganese oxides have catalytic activity on the degradation of methylene blue (MB) dye with H2O2as oxidant. The results revealed that the effective degradation could be achieved only in the presence of both the birnessite and H2O2, whereas without the addition of catalyst (H2O2only) or addition of H2O2(catalyst only), the 3.5% and 15.5% of MB removal were obtained, respectively.