안형준

Water adsorption over functionalized MOFs: effect of amino and ammonium groups loaded on MOFs

Hyung Jun An, Sung Hwa Jhung*

Department of Chemistry and Green-Nano Materials Research Center, Kyungpook National University, Daegu 702-701, Republic of Korea
*Corresponding author, e-mail: sung@knu.ac.kr, Fax: (+) 82-53-950-6330

Recently, the energy used for air conditioners accounts for a large share of total energy consumption. An adsorption heat transformation (AHT) system, using heat released and absorbed by adsorption and desorption of guest molecules, is considered as a viable alternative to traditional air conditioning systems. In this study, metal organic frameworks (here, UiO-66s and MIL-125s) were used as adsorbents for water adsorption. UiO-66-NH3+ and MIL-125- NH3+ showed better water adsorption capability at relatively low pressure than UiO-66, UiO-66-NH2, MIL-125 and MIL-125-NH2, which is expected to be due to hydrogen bonding and electrostatic effects. Additionally, UiO-66-NH3+ and MIL-125-NH3+ are recommended as adsorbents for AHT system because recyclability is also better than the pristine and amino-functionalized MOFs..
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