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Adsorption of isopropanol on a nickel oxide

Adsorption of isopropanol on a nickel oxide

Abstract

Получены изотермы адсорбции изопропанола в интервале температур 243 303 К на исходной поверхности оксида никеля и после ее обработок в высокочастотной плазме в Ar и плазме тлеющего разряда в О2. Отмечено, что указанные обработки уменьшают значения изостерической теплоты и дифференциальной энтропии обратимой адсорбции, а также общей кислотности поверхности оксида. При малой степени заполнения изотермы описаны уравнением индуцированной адсорбции. Установлено, что адсорбированные молекулы изопропанола находятся в отрицательно заряженной и двух положительно заряженных формах. Сделан вывод, что в качестве центров адсорбции могут быть льюисовские кислотные центры различной силы наряду с центрами другой природы.

Adsorption isotherms of isopropanol are obtained in the temperature range of 243 to 303 K on the initial surface of nickel oxide after its treatment in high-frequency plasma in Ar and glow-discharge plasma in O2. It is found that such treatment lower the isosteric heat and differential entropy of reversible adsorption, along with the general acidity of the oxide’s surface. At low degrees of filling, isotherms are described by the equation of induced adsorption. It is established that adsorbed molecules of isopropanol take negatively charged and two positively charged forms. Lewis acidic centers of various strengths can serve as adsorption centers in addition to centers of other types.

Keywords

плазма, адсорбция, isopropanol, adsorption, льюисовские кислотные центры, nickel oxide, изопропанол, оксид никеля, Lewis acidic centers, plasma

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
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