Перевод названия: Study of functional groups on the surface of the oxidized carbon material Sibunit by acid-base titration and XPS
Тип публикации: статья из журнала
Год издания: 2017
Идентификатор DOI: 10.17223/24135542/10/1
Ключевые слова: carbon, oxidation, activation, Xps, titration, углерод, окисление, активация, РФЭС, титрование
Аннотация: Проведены обзор литературы об исследованиях химического состава поверхности углеродных материалов методами кислотно-основного титрования и РФЭС и экспериментальное сравнительное исследование качественного и количественного состава поверхностных групп восьми образцов окисленного различными окислителями (сухим и влажным воздухом, H2OПоказать полностью2, NaClO и HNO3) углеродного материала Сибунит-4©. Найдено частичное соответствие результатов, полученных методом РФЭС, с результатами, полученными методом титрования. The literature on the application of acid-base titration and XPS methods to determine the chemical state of the surface of carbon materials was reviewed and the possibilities, advantages, and disadvantages of these methods discussed. Simultaneous use of these methods and comparison of the results was justified to obtain the most reliable information on the qualitative and quantitative composition of the surface functional groups of carbon materials. An experimental comparative study was conducted of the qualitative and quantitative composition of the surface groups of eight samples oxidized with various oxidants (dry and wet air, hydrogen peroxide, sodium hypochlorite, and nitric acid) and under different conditions of the graphite-like carbon of the Sibunit series. The application of all the oxidants except of dry air produced a significant number of oxygen-containing groups on the surface of the carbon. The results obtained by the XPS method and the results obtained by the titration method partially corresponded. The series of changes in the concentration of surface groups nearly coincided, but the relative concentrations of the detectable oxygen differed markedly. A correlation was found between the 531.3 eV line of the O1s spectrum and the content of carbonyl groups on the carbon surface. There were no correlations with lines in the spectra for the content of alcohol, carboxyl, and ester groups. Thus, to obtain the most accurate information about the chemical nature of the surface of a carbon material, it will be necessary to use a wider set of physicochemical methods.
Журнал: Вестник Томского государственного университета. Химия
Выпуск журнала: № 10
Номера страниц: 6-26
ISSN журнала: 24135542
Место издания: Томск
Издатель: Национальный исследовательский Томский государственный университет