CD Tesis
Pengaruh Reduktor Maltosa Terhadap Karakter Kristal Dan Aktivitas Katalitik Mangan Oksida
The Catalysts of Manganese oxide type of birnessite and cryptomelane have been successfully synthesized using deposition method through three variations of mixing reactants namely method A (adding dropwise of the KMnO4 solution into maltose solution), method B (adding dropwise of the maltose solution into KMnO4 solution) and the C method (the maltose solution and KMnO4 solution are mixed together) with comparisons of reactant moles (KMnO4 / Maltose) are 3: 1 and 2: 3. The products were calcined at 600oC for 4 hours. Both Catalysts with and without calcinations were characterized using X-Ray Difraction (XRD), Energy Dispersive X-ray Spectroscopy (EDX), Gas Surface Analyzers (GSA), Atomic Absorption Spectrophotometer, and measurement of average manganese oxidation levels (AOS). The results of characterization showed birnessite-type manganese oxides were obtained for catalysts without calcination and cryptomelane-type for catalysts with calcination. The catalysts without calcination have higher surface area, lower K / Mn ratio, lower AOS and lower crystallinity compared to catalysts with calcination. The catalytic activity of the manganese oxide catalyst is used for the degradation of methylene blue by using H2O2 as an oxidant. The maximum degradation of methylene blue was 96.713% using catalyst without calcination with addition of 10 mL H2O2 volume synthesized by mixing method of KMnO4 to maltose and mol ratio (KMnO4 / Maltose) 3: 1.
Keywords: Birnessite, cryptomelane, maltose, methylene blue, manganese oxide
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