Engineering birnessite-type MnO2 nanosheets on fiberglass for pH-dependent degradation of methylene blue |
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Affiliation: | 1. National Research Tomsk State University, Pr. Lenina, 36, Tomsk 634050, Russia;2. Boreskov Institute of Catalysis, Pr. Akademika Lavrentieva, 5, Novosibirsk 630090, Russia;3. Novosibirsk State University, Pirogova str., 2, Novosibirsk 630090, Russia |
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Abstract: | We construct hierarchical MnO2 nanosheets @ fiberglass nanostructures via one-pot hydrothermal method without any surfactants. The morphology and structure of MnO2-modified fiberglass composites are examined by focus ion beam scanning electron microscopy (FIB/SEM), X-Ray diffraction (XRD) and Fourier transform infrared spectroscopy (FT-IR). The birnessite-type MnO2 nanosheets are observed to grow vertically on the surface of fiberglass. Furthermore, the birnessite-type MnO2-fiberglass composites exhibit good ability for degradation of methylene blue (MB) in different pH levels. In neutral solution (pH 6.5–7.0), it achieves a high removal rate of 96.1% (2 h, at 60 °C) in the presence of H2O2; and in acidic environment (pH 1.5), 96.8% of MB solution (20 mg/L, 100 mL) is decomposed by oxidation within only 5 min. In principles, the rational design of MnO2 nanosheets-decorated fiberglass architectures demonstrated the suitability of the low-cost MnO2-modified fiberglass nanostructure for water treatment. |
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Keywords: | Inorganic compound Chemical synthesis Electron microscopy Surface properties |
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