Modification of the MCM-41 mesoporous silica and its influence on the hydration and properties of a cement matrix

Szeląg, Maciej; Janek, Martyna; Panek, Rafał; Madej, Jarosław; Fronczyk, Joanna

doi:10.1016/j.conbuildmat.2022.128253

Cited by 6 publications

(6 citation statements)

References 45 publications

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“…The increase of the S BET values could be explained by the creation of new pores resulting from the liberation of gaseous nitrogen oxides during the thermal dissociation of metal nitrates. 37,38 Generally, larger S BET can improve the dispersion of active components, exposing more active sites to increase the contact area between the catalyst and reactant molecules. 39 It is beneficial to the NH 3 -SCR reaction at LT.…”

Section: Resultsmentioning

confidence: 99%

A comparative study of Zr, Al or Sr doped Mn/MCM-41 for NH₃-SCR and resistance to SO₂/H₂O

Guo

et al. 2022

New J. Chem.

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Section: Resultsmentioning

confidence: 99%

A comparative study of Zr, Al or Sr doped Mn/MCM-41 for NH₃-SCR and resistance to SO₂/H₂O

Guo

et al. 2022

New J. Chem.

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“…Other ordered mesoporous silica materials, such as MCM-41 and SBA-15, have more satisfactory characteristics with better hydrothermal stability and controlled porous structures that are easily accessible by water molecules moving back and forth from the atmosphere to internal pores [128,129]. Slightly different from MCM-41, SBA-15 exhibited a rod structure with a two-dimensional hexagonal channel structure (Figure 14l [130] and Figure 14m [128], respectively). Studies have identified that pore size [131,132] and Si/Al ratios [133] mainly affect the hydrophobic-hydrophilic properties and cycling performance of MCM-41 and SBA-15.…”

Section: Physics and Chemical Characterization Of Host Matricesmentioning

confidence: 99%

“…Figure 14. SEM images of activated carbon fiber felt (a) [98], activated carbon foam (b) [99], expanded natural graphite (c) [102], carbon nanotubes (d) [104], activated alumina (e) [107], zeolite 13X (f) [106], attapulgite (g) [113], expanded vermiculite (h) [114], diatomite (i) [115], silica gel (j) [126], silica aero-gels (k) [127], MCM-41 (l) [130], SBA-15 (m) [128], AlPO4-5 (n) [155], SAPO-34 (o) [159], VAPO-5 (p) [158], MIL-101 (q) [166], Aluminum fumarate (r) [167], UiO-67 (s) [168], and PCN-33 (t) [169]: Reprinted with permission from Ref. [98] Copyright © 2016 Elsevier Ltd. All rights reserved; with permission from Ref.…”

Section: Peer Review 21 Of 58mentioning

confidence: 99%

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Salt Hydrate Adsorption Material-Based Thermochemical Energy Storage for Space Heating Application: A Review

et al. 2023

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Recent years have seen increasing attention to TCES technology owing to its potentially high energy density and suitability for long-duration storage with negligible loss, and it benefits the deployment of future net-zero energy systems. This paper provides a review of salt hydrate adsorption material-based TCES for space heating applications at ~150 °C. The incorporation of salt hydrates into a porous matrix to form composite materials provides the best avenue to overcome some challenges such as mass transport limitation and lower thermal conductivity. Therefore, a systematic classification of the host matrix is given, and the most promising host matrix, MIL-101(Cr)(MOFs), which is especially suitable for loading hygroscopic salt, is screened from the perspective of hydrothermal stability, mechanical strength, and water uptake. Higher salt content clogs pores and, conversely, reduces adsorption performance; thus, a balance between salt content and adsorption/desorption performance should be sought. MgCl2/rGOA is obtained with the highest salt loading of 97.3 wt.%, and the optimal adsorption capacity and energy density of 1.6 g·g−1 and 2225.71 kJ·kg−1, respectively. In general, larger pores approximately 8–10 nm inside the matrix are more favorable for salt dispersion. However, for some salts (MgSO4-based composites), a host matrix with smaller pores (2–3 nm) is beneficial for faster reaction kinetics. Water molecule migration behavior, and the phase transition path on the surface or interior of the composite particles, should be identified in the future. Moreover, it is essential to construct a micromechanical experimental model of the interface.

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“…The most exciting features of these materials, such as a relatively large BET-specific surface area and pore volume, hydrophobic surface nature, etc., manifest themselves as selective adsorbents for removing volatile organic compounds present in high-humidity gas streams or wastewater. Some authors argue that mesoporous siliceous adsorbents have both the amorphous characteristics of gels and the well-ordered zol structure of crystalline materials [7][8][9]. The framework of MCM-41-type adsorbents usually consists of hexagonally arranged cylindrical mesopores with a large surface area and narrow pore size distribution.…”

Section: Introductionmentioning

confidence: 99%

Parametric Modelling of the Crystalline Microstructure of the MCM41-Type Mesoporous Silica Modified with Derivatives of Alkyls

Stocki,

Kuśmierz,

Sofińska-Chmiel

et al. 2024

Materials

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A siliceous material in which a framework order was established with a surfactant with sixteen carbon atoms in alkyl chains, MCM-41-C16, was synthesised, surface-modified, and tested regarding the selected physical properties. The pristine material was extracted in an acidic aqueous alcohol and then lined with different surface groups. The properties of four adsorbents were investigated using XRD, X-ray photoelectron spectroscopy, and N2 physisorption techniques. The unit–cell constant was determined from X-ray diffractograms, being in fixed relation to the edge length of the hexagonal frame. The specific surface areas of mesopores and whole crystallites were determined from low-temperature N2-physisorption isotherms. The novelty of this work is a mathematical model of a crystalline microstructure explaining the sizes and shapes of crystalline grains in relation to adsorption features, proposed and successfully tested with the aforementioned experimental data. The roughness of the surface is different from one that is necessary to explain the experimental characteristics quantitatively.

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Modification of the MCM-41 mesoporous silica and its influence on the hydration and properties of a cement matrix

Cited by 6 publications

References 45 publications

A comparative study of Zr, Al or Sr doped Mn/MCM-41 for NH₃-SCR and resistance to SO₂/H₂O

A comparative study of Zr, Al or Sr doped Mn/MCM-41 for NH₃-SCR and resistance to SO₂/H₂O

Salt Hydrate Adsorption Material-Based Thermochemical Energy Storage for Space Heating Application: A Review

Parametric Modelling of the Crystalline Microstructure of the MCM41-Type Mesoporous Silica Modified with Derivatives of Alkyls

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Modification of the MCM-41 mesoporous silica and its influence on the hydration and properties of a cement matrix

Cited by 6 publications

References 45 publications

A comparative study of Zr, Al or Sr doped Mn/MCM-41 for NH3-SCR and resistance to SO2/H2O

A comparative study of Zr, Al or Sr doped Mn/MCM-41 for NH3-SCR and resistance to SO2/H2O

Salt Hydrate Adsorption Material-Based Thermochemical Energy Storage for Space Heating Application: A Review

Parametric Modelling of the Crystalline Microstructure of the MCM41-Type Mesoporous Silica Modified with Derivatives of Alkyls

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Product

Resources

About

A comparative study of Zr, Al or Sr doped Mn/MCM-41 for NH₃-SCR and resistance to SO₂/H₂O

A comparative study of Zr, Al or Sr doped Mn/MCM-41 for NH₃-SCR and resistance to SO₂/H₂O