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

Weinberger, Christian; Hartmann, Marc; Ren, Sai; Sandberg, Thomas; Tiemann, Michael

doi:10.1016/j.micromeso.2018.02.035

Cited by 6 publications

(3 citation statements)

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“…This explains why a selective deposition of the guest species has a strong impact on the diffractograms. [ 149,154,206 ] Calculated diffractograms of simulated S@ intra CMK‐5 and S@ intra CMK‐9 composite materials are shown in Figure . The guest species‐free samples are shown at the bottom.…”

Section: Characterization Techniquesmentioning

confidence: 99%

“…It is noteworthy that the electron density of the guest species should be as close as possible to the value of the carbon matrix to obtain diffraction patterns with a reasonable intensity. [ 143,144,149,154 ] Thus, sulfur is an ideal guest species for this purpose. [ 149,154,206 ] In the case of metal oxides, the electron density of the guest species is much higher as compared to the surrounding framework.…”

Section: Characterization Techniquesmentioning

confidence: 99%

“…Calculated diffractograms of CMK‐5 (left, adapted with permission. [ 154 ] Elsevier) and CMK‐9 (right, adapted with permission. [ 206 ] Elsevier) carbon‐based materials with sulfur deposited in the intratubular pore systems.…”

Section: Characterization Techniquesmentioning

confidence: 99%

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Selective Modification of Hierarchical Pores and Surfaces in Nanoporous Materials

Tiemann

Weinberger

2020

Adv Materials Inter

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Tailor‐made ordered mesoporous materials bear great potential in numerous fields of application where large interfaces are required. However, the inherent surfacechemical properties of conventional materials, such as silica, carbon or organosilica, poses some limitations with respect to their application. Surface manipulation by functionalization with chemically more reactive groups is one way to improve materials for their desired purpose. Another approach is the design of high surface‐area composite materials. The surface manipulation, either by functionalization or by introducing guest species, can be performed selectively. This means that when several distinct, i.e. , hierarchical, types of surfaces or pore systems exist in a material, each of them may be chosen for manipulation. Several strategies can be identified to achieve this goal. Molecules or molecule assemblies can be utilized to temporarily protect pores or surfaces (soft protection), while manipulation occurs at the accessible sites. This approach is a recurring motive in this review and can also be applied to rigid template matrices (hard protection). Furthermore, the size of functionalization agents (size protection) and their reactivity/diffusion (kinetic protection) into the pores can also be utilized to achieve selectivity. In addition, challenges in the synthesis and characterization of selectively manipulated ordered mesoporous materials are discussed.

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Section: Characterization Techniquesmentioning

confidence: 99%

Section: Characterization Techniquesmentioning

confidence: 99%