Preparation of mesoporous carbon monolith
Song, Min Jr (2019)
Song, Min Jr
2019
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Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:amk-2021090417437
https://urn.fi/URN:NBN:fi:amk-2021090417437
Tiivistelmä
In this paper, we introduce the preparation of three-dimensional ordered meso-porous carbon monolith using SNSs as templates. The key of this experiment was to prepare the uniform-sized silica nanospheres (SNSs).In our study, monodisperse SNSs were prepared by liquid phase method, which was based on Stöber method. The arrangement of SNSs into the cubic closed packed (ccp) structure was achieved simply by solvent evaporation, and they had high uni-formity of size.
The size of SNSs was roughly analyzed by dynamic light scattering (DLS). It proved that SNSs 14 nm, 40 nm, 60 nm and 80 nm in size have been synthe-sized successfully. By changing the size of the sphere, the sizes of the pores between particles have been well adjusted, so it was beneficial to adjust the sizes of carbon materials subsequently. The fabrication process of carbon monolith was as follows, carbon precursors were filled into the voids of SNSs assembled into three-dimensional structure by incipient-wetness technique, and then the carbon monolith were obtained by carbonation in high tempera-ture and removal of silica templates. The size and morphology of mesoporous carbon monolith were analyzed by scanning electron microscope (SEM). The specific surface area, pore volume and pore size of carbon monolith were characterized by N2 adsorption-desorption. In addition, the application of car-bon materials mainly focused on the adsorption for volatile organic compounds (VOCs) and as battery electrode.
The size of SNSs was roughly analyzed by dynamic light scattering (DLS). It proved that SNSs 14 nm, 40 nm, 60 nm and 80 nm in size have been synthe-sized successfully. By changing the size of the sphere, the sizes of the pores between particles have been well adjusted, so it was beneficial to adjust the sizes of carbon materials subsequently. The fabrication process of carbon monolith was as follows, carbon precursors were filled into the voids of SNSs assembled into three-dimensional structure by incipient-wetness technique, and then the carbon monolith were obtained by carbonation in high tempera-ture and removal of silica templates. The size and morphology of mesoporous carbon monolith were analyzed by scanning electron microscope (SEM). The specific surface area, pore volume and pore size of carbon monolith were characterized by N2 adsorption-desorption. In addition, the application of car-bon materials mainly focused on the adsorption for volatile organic compounds (VOCs) and as battery electrode.