MeltsMeltsРасплавы0235-01063034-5715The Russian Academy of Sciences66126510.31857/S0235010623050031UQGGSYArticlesСтатьиX-RAY PHOTOELECTRON SPECTROSCOPY STUDY OF THE REDUCTION AND ADSORPTION CAPACITY OF CARBON NANOMATERIALS BY THE RELEASE OF Mn(VII) IONSИсследование методом рентгеновской фотоэлектронной спектроскопии восстановительной и адсорбционной способности углеродных наноматериалов по выделению ионов Mn(VII)DorogovaV. A.ДороговаВ. А.yolshina@ihte.uran.ruYolshinaL. A.ЕлшинаЛ. А.yolshina@ihte.uran.ruPryakhinaV. I.ПряхинаВ. И.yolshina@ihte.uran.ruInstitute of High-Temperature Electrochemistry, Ural Branch of the RASИнститут высокотемпературной электрохимии УрО РАНUral Federal University named by B.N. YeltsinУральский федеральный университет им. Б.Н. Ельцина01092023552553925022025Copyright ©; 2023, В.А. Дорогова, Л.А. Елшина, В.И. ПряхинаCopyright ©; 2023, В.А. Дорогова, Л.А. Елшина, В.И. Пряхина2023В.А. Дорогова, Л.А. Елшина, В.И. ПряхинаВ.А. Дорогова, Л.А. Елшина, В.И. Пряхинаhttps://journals.eco-vector.com/0235-0106/article/view/661265

The reductive and adsorption capacity of hierarchically structured carbon films synthesized from glucose on a molten aluminum catalyst under a layer of molten salts and thermally reduced graphene oxide upon their interaction with a sodium permanganate solution in a neutral medium at room temperature has been studied. The data obtained by X-ray photoelectron spectroscopy show that all manganese adsorbed on the surface of all carbon nanomaterials is in a reduced form – most of it is in the form of quadrivalent manganese ions, and about 20% is in the form of trivalent manganese ions, which makes the formed carbon-oxide composites promising materials as cathodes of chemical current sources. Thermally reduced graphene oxide demonstrated the lowest adsorption activity. Hierarchically structured carbon films make it possible to adsorb up to 100 wt % of the original manganese in neutral media, which is much higher than with all known commercial adsorbents.

Исследована восстановительная и адсорбционная способность иерархически структурированных углеродных пленок, синтезированных из глюкозы на расплавленном магниевом катализаторе под слоем расплавленных солей и термически восстановленного оксида графена при их взаимодействии с раствором перманганата натрия в нейтральной среде при комнатной температуре. Полученные методом рентгеновской фотоэлектронной спектроскопии данные показывают, что весь адсорбированный на поверхности углеродных наноматериалов марганец находится в восстановленном виде – большая часть в виде ионов четырехвалентного марганца, а порядка 20% – в виде ионов трехвалентного марганца, что делает образованные углеродно-оксидные композиты перспективными материалами в качестве катодов химических источников тока. Самую низкую адсорбционную активность продемонстрировал термически восстановленный оксид графена. Иерархически структурированные углеродные пленки позволяют адсорбировать до 100 мас. % исходного марганца в нейтральных средах, что много выше по сравнению со всеми известными коммерческими адсорбентами.

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