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- W4293065233 endingPage "106997" @default.
- W4293065233 startingPage "106997" @default.
- W4293065233 abstract "Different phase nanostructured MnO2, including α-, β-, γ-, and δ-MnO2, were prepared by a hydrothermal route. Their photocatalytic activities in the degradation of cationic (methylene blue) and anionic (methyl orange) dyes were compared for the first time. The as-prepared oxides were characterized by X-ray diffraction, scanning electron microscopy, X-ray photoelectron spectroscopy, and low-temperature nitrogen adsorption-desorption techniques. It was shown that the highest efficiency was achieved in the degradation of cationic methylene in the presence of the δ-MnO2 photocatalyst (conversion of methylene blue was 90.4% after 180 min). These results are explained by unique physicochemical properties of the δ-MnO2 polymorph. It was observed that there is a synergetic effect between various physicochemical properties of δ-MnO2 which allows to obtain the high photodegradation efficiency: high adsorption ability towards methylene blue, unique 2D morphology, lower Mn–O bond strength, and high surface Mn4+/Mn3+ molar ratio. The reaction mechanism as well as the main products of the methylene blue photooxidation process over δ-MnO2 were also investigated." @default.
- W4293065233 created "2022-08-26" @default.
- W4293065233 creator A5013380385 @default.
- W4293065233 creator A5015277012 @default.
- W4293065233 creator A5025382856 @default.
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- W4293065233 creator A5059002739 @default.
- W4293065233 creator A5063363124 @default.
- W4293065233 creator A5067349310 @default.
- W4293065233 creator A5077653666 @default.
- W4293065233 date "2022-10-01" @default.
- W4293065233 modified "2023-09-26" @default.
- W4293065233 title "Regulating of MnO2 photocatalytic activity in degradation of organic dyes by polymorphic engineering" @default.
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