Journal
CHEMISTRY OF MATERIALS
Volume 25, Issue 5, Pages 790-798Publisher
AMER CHEMICAL SOC
DOI: 10.1021/cm304055k
Keywords
water sorption; metal-organic frameworks; MIL-101Cr; postsynthetic modification; heat transformation
Funding
- Federal German Ministry of Economics (BMWi) [0327851A/B]
- Friedrich-Ebert-Stiftung
- European Union
- Federal State of Lower Saxony
Ask authors/readers for more resources
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 ffinctionalized materials (2, 4) contain about 78 mol 96 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-NH2, 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 Delta(BET) = -6.3% after 40 cycles, while the nitro-functionalized MIL-101Cr exhibited a decrease in their BET surface of Delta(BET) = -25% and -20% for 3 and 4, respectively.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available