Journal
CRYSTAL GROWTH & DESIGN
Volume 17, Issue 3, Pages 1208-1213Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.cgd.6b01597
Keywords
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Funding
- National Research Council of Science Technology
- Ministry of Science
- ICT and Future Planning (MSIP) of the Republic of Korea [B6-2403]
- UV vis spectra (NRF Basic Science Research Program) [2016R1C1B2010838]
- National Research Foundation of Korea [2016R1C1B2010838] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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NH2-MIL-125 has been investigated as a water adsorbent because of its high hydrothermal stability and S-shaped water adsorption isotherm. Herein, we report the synthesis of NH2-MIL-125 with high surface area and water capacity for an adsorption heat transformation (AHT) system. NH2-MIL-125 derived from Ti(BuO)(4) shows higher surface area and water uptake than those of Ti(iPrO)(4)-derived samples regardless of the synthesis method. In a sense of crystallinity, a solvothermal method with static conditions generated more distinct crystalline properties than the one synthesized by a reflux reaction as confirmed from powder X-ray diffraction analysis, UV vis absorbance spectra, and scanning electron microscopy images. Considering it as an adsorbent for an AHT system, the Ti(BuO)(4)-derived sample synthesized by a solvothermal method shows an ideal S-shaped isotherm with a steep rise in water uptake at lower relative pressure (0.550 g/g at P/P-0 = 0.30), which is attributed to narrow triangle apertures and hydrophilic functional groups. This material shows the dynamic water adsorption/desorption cycle without any noticeable weight change.
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