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Regulating of MnO2 photocatalytic activity in degradation of organic dyes by polymorphic engineering. / Belousov, Artem S.; Suleimanov, Evgeny V.; Parkhacheva, Alina A.; Fukina, Diana G.; Koryagin, Andrey V.; Koroleva, Aleksandra V.; Zhizhin, Evgeny V.; Gorshkov, Alexey P.
в: Solid State Sciences, Том 132, 106997, 01.10.2022.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Regulating of MnO2 photocatalytic activity in degradation of organic dyes by polymorphic engineering
AU - Belousov, Artem S.
AU - Suleimanov, Evgeny V.
AU - Parkhacheva, Alina A.
AU - Fukina, Diana G.
AU - Koryagin, Andrey V.
AU - Koroleva, Aleksandra V.
AU - Zhizhin, Evgeny V.
AU - Gorshkov, Alexey P.
N1 - Publisher Copyright: © 2022 Elsevier Masson SAS
PY - 2022/10/1
Y1 - 2022/10/1
N2 - 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.
AB - 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.
KW - Dye degradation
KW - Manganese dioxide
KW - Photocatalyst
KW - Polymorphs
KW - Visible light
UR - http://www.scopus.com/inward/record.url?scp=85136118943&partnerID=8YFLogxK
UR - https://www.mendeley.com/catalogue/6cea03ed-2aeb-3cd5-8a37-f4461c33c44e/
U2 - 10.1016/j.solidstatesciences.2022.106997
DO - 10.1016/j.solidstatesciences.2022.106997
M3 - Article
AN - SCOPUS:85136118943
VL - 132
JO - Solid State Sciences
JF - Solid State Sciences
SN - 1293-2558
M1 - 106997
ER -
ID: 99692334