Surface Functionalization of Activated Carbon: Coupling of 3-(Aminopropyl)trimethoxysilane and (3-Glycidyloxypropyl)trimethoxysilane

Lucija Pustahija, Christine Bandl, Sayed Ali Ahmad Alem, Wolfgang Kern

Publikation: Beitrag in FachzeitschriftArtikelForschungBegutachtung

Abstract

This study aimed to functionalize the surface of activated carbon, and thus render the surface more hydrophilic and reactive. To attain this goal, sequential surface functionalization was carried out using (i) oxidation (pre-activation) and (ii) secondary functionalization. The carbon surface was pre-activated in an autoclave via solvothermal oxidation (i.e., wet oxidation) with nitric acid. Alternatively, plasma-assisted oxidation with a mixture of argon and oxygen (i.e., dry oxidation) was employed. A subsequent step included the reduction in formed carbonyl groups with LiAlH4. Following that, secondary functionalization was performed with 3-(aminopropyl)trimethoxysilane (APTMS) or (3-glycidyloxypropyl)trimethoxysilane (GPTMS), respectively. Changes in the surface composition of carbon after functionalization and morphology were examined by X-ray photoelectron spectroscopy, ATR-FTIR spectroscopy, and scanning electron microscopy. Oxidized carbon samples were successfully modified at their surfaces with APMTS and GPTMS, yielding Si content of 3.2 at. % and 1.9 at. % for wet-oxidized carbon and 5.1 at. % and 2.8 at. % for dry-oxidized carbon, respectively.
OriginalspracheEnglisch
Aufsatznummer104
Seitenumfang16
FachzeitschriftC-Journal of Carbon Research
Jahrgang10.2024
Ausgabenummer4
DOIs
PublikationsstatusVeröffentlicht - 12 Dez. 2024

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