Effect of functional groups in MIL-101 on water sorption behavior

Akiyama, George; Matsuda, Ryotaro; Satō, Hiroshi; Hori, Akihiro; Takata, Masaki; Kitagawa, Susumu

doi:10.1016/j.micromeso.2012.01.015

Cited by 295 publications

(237 citation statements)

References 33 publications

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“…Compared to the nonmodified MIL-101Cr material, the amino-functionalized compounds 1 and 2 start to show large water uptake already below p/p 0 ≈ 0.4 ( Figure 5, bottom right), in agreement with their anticipated increased hydrophilicity through the added hydrophilic amino sites. 37 In addition, marked differences were observed among the adsorption isotherms of the modified samples in this pore filling region. Amino-functionalized compounds (1 and 2) adsorb water within a narrow range of 0.38 < p/p 0 < 0.48.…”

Section: ■ Results and Discussionmentioning

confidence: 94%

“…Recently a water sorption study of functional MIL-101Cr materials was reported in the literature. 37 Yet our work on functionalized MIL-101Cr differs: we have explored the water sorption properties of MIL-101Cr-NH 2 (1), MIL-101Cr-pNH 2 (2), MIL-101Cr-NO 2 (3), and MIL-101Cr-pNO 2 (4), where p stands for partial ligand amination and nitration; that is, functionalized MIL-101Cr materials containing two different ligands. Water loadings and water stabilities of these modified MIL-101Cr materials have been examined over 40 sorption cycles together with desorption kinetics.…”

Section: ■ Introductionmentioning

confidence: 99%

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Water Sorption Cycle Measurements on Functionalized MIL-101Cr for Heat Transformation Application

et al. 2013

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ABSTRACT:The water loading capacity and water cycle stability (40 adsorption/ desorption cycles) of four nitro-or amino-functionalized MIL-101Cr materials (1−4) is assessed for heat transformation applications. Amino-or nitro-functionalized (1, 3) and partially amino-or nitro-functionalized MIL-101Cr (2, 4) have been synthesized through time-controlled postsynthetic modification of MIL-101Cr. The partially functionalized materials (2, 4) contain about 78 mol % amino-or nitro-functionalized terephthalate linker. Hydrophilic nitro or amino functionalities were introduced into MIL-101Cr in order to achieve water loading at lower p/p 0 values for possible use in thermally driven adsorption chillers or heat pumps. Among the four materials studied, fully aminated MIL-101Cr-NH 2 , 1, and partially aminated MIL-101Cr-pNH 2 , 2, showed the best water loadings (about 1.0 gH 2 O/gMIL) as well as water stability over 40 adsorption−desorption cycles. After 40 cycles, the X-ray powder diffractogram and Brunauer−Emmett−Teller (BET) surface determination of amino-functionalized materials indicated structural integrity with Δ BET = −6.3% after 40 cycles, while the nitro-functionalized MIL-101Cr exhibited a decrease in their BET surface of Δ BET = −25% and −20% for 3 and 4, respectively.

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Section: ■ Results and Discussionmentioning

confidence: 94%

Section: ■ Introductionmentioning

confidence: 99%

Water Sorption Cycle Measurements on Functionalized MIL-101Cr for Heat Transformation Application

et al. 2013

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“…On the other hand, although a few of MOFs such as MIL-101(Cr) with thermodynamically stable property has not only high moisture stability but also high CO 2 capacity [16,23], its high hydrophilicity resulted in sharp decrease in its CO 2 uptake in humid atmosphere [24]. The reason may be that the unsaturated metal centers (UMCs) of these MOFs like MOL-101(Cr) have strong selectivity for CO 2 in presence of other gases, and meanwhile, these UMCs are very hydrophilic [25][26][27], which would promote competitive adsorption of water vapor [24,28]. Therefore, developing novel adsorbents with high CO 2 capacity and moisture resistance performance or vapor-enhanced CO 2 adsorption function is crucial.…”

Section: Introductionmentioning

confidence: 99%

Vapor-enhanced CO2 adsorption mechanism of composite PEI@ZIF-8 modified by polyethyleneimine for CO2/N2 separation

Xian

et al. 2015

Chemical Engineering Journal

110

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“…MIL-101, MIL-125NH 2 and MOF-841 in Table 2) due to their unique combination of properties such as high surface area, crystalline open structure, tunable pore size and functionality [62][63][64]. These materials can exhibit very large water adsorption capacity (e.g.…”

Section: Adsorptive Inter-seasonal Heat Storagementioning

confidence: 99%

Current progress in adsorption technologies for low-energy buildings

Aristov

2015

Future Cities and Environment

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More than half of the world's population currently lives in cities. An essential constituent of future sustainable cities is energy efficient and ecologically sound buildings which ensure high levels of comfort and convenience without reducing the standards of living. At present, a significant part of primary fossil fuels is spent for heating/cooling of buildings, thus, greatly contributing to total GHG emissions. In this paper, typical heat losses in dwellings are considered taking the United Kingdom and the Russian Federation as examples. The role of adsorption-based technologies for more rational use of heat in buildings is discussed. Fundamentals of inter-seasonal adsorptive heat storage (AHS) are briefly considered. A tentative upper limit of the AHS storage density is estimated. Current practice of inter-seasonal AHS and novel smart adsorbents promising for this emerging technology are overviewed. Since a portion of the heat losses in ventilation system significantly increases in modern buildings, a new approach to regenerating heat and moisture in this system is discussed. Finally, optimization trends of the AHS in buildings are briefly considered.

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Effect of functional groups in MIL-101 on water sorption behavior

Cited by 295 publications

References 33 publications

Water Sorption Cycle Measurements on Functionalized MIL-101Cr for Heat Transformation Application

Water Sorption Cycle Measurements on Functionalized MIL-101Cr for Heat Transformation Application

Vapor-enhanced CO2 adsorption mechanism of composite PEI@ZIF-8 modified by polyethyleneimine for CO2/N2 separation

Current progress in adsorption technologies for low-energy buildings

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