Selective pore filling of mesoporous CMK-5 carbon studied by XRD: Comparison between theoretical simulations and experimental results

A1 Originalartikel i en vetenskaplig tidskrift (referentgranskad)


Interna författare/redaktörer


Publikationens författare: Christian Weinberger, Marc Hartmann, Sai Ren, Thomas Sandberg, Jan-Henrik Smått, Michael Tiemann
Förläggare: ELSEVIER SCIENCE BV
Publiceringsår: 2018
Tidskrift: Microporous and Mesoporous Materials
Tidskriftsakronym: MICROPOR MESOPOR MAT
Volym: 266
Artikelns första sida, sidnummer: 24
Artikelns sista sida, sidnummer: 31
Antal sidor: 8
ISSN: 1387-1811
eISSN: 1873-3093


Abstrakt

It is possible to infiltrate a guest species selectively in one pore system of bimodal mesoporous CMK-5 carbon by an optimized nanocasting procedure. The selective filling has a drastic impact on the low-angle X-ray diffraction pattern of this novel class of materials. The structures of CMK-5, CMK-5 composite materials (sulfur and SnO2 as guest species), and CMK-3 carbon were simulated to investigate the influence of the pore filling with different guest species on the diffraction pattern and compared with experimental results. Additionally, the impact of structural defects is taken into account. The nature of the guest species strongly influences the relative intensity of the diffraction peaks. It turns out that the diffraction patterns of sulfur-carbon composite materials are nearly identical as those of CMK-3 carbon, which is attributed to a similar electron density of carbon and sulfur. Thus, sulfur is an ideal guest species to investigate the selective pore filling in CMK-5 carbon.


Nyckelord

CMK-5 carbon, Low-angle X-ray diffraction, Ordered mesoporous carbon

Senast uppdaterad 2019-08-12 vid 03:30