Grafting of hydrophilic ethylene glycols or ethylenediamine on coordinatively unsaturated metal sites in MIL-100(Cr) for improved water adsorption characteristics

被引：73
|
作者：
Wickenheisser, Martin [1 ]
Jeremias, Felix [2 ]
Henninger, Stefan K. [2 ]
Janiak, Christoph [1 ]
机构：
[1] Univ Dusseldorf, Inst Anorgan Chem & Strukturchem, D-40204 Dusseldorf, Germany
[2] Fraunhofer Inst Solar Energy Syst ISE, Dept Thermally Act Mat & Solar Cooling, D-79110 Freiburg, Germany
来源：
INORGANICA CHIMICA ACTA | 2013年 / 407卷
关键词：
Metal-organic framework; Grafting; Ethylene glycols; Ethylenediamine; Water adsorption; Heat transformation; MIXED-MATRIX MEMBRANES; ORGANIC FRAMEWORKS; GAS SEPARATION; HEAT-PUMP; CHROMIUM(III) CARBOXYLATE; NANOPOROUS MATERIALS; HYDROGEN STORAGE; ENERGY STORAGE; CO2; ADSORPTION; SURFACE-AREA;
D O I：
10.1016/j.ica.2013.07.024
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
Grafting of activated MIL-100(Cr) with EG (ethylene glycol), DEG (diethylene glycol), TEG (triethylene glycol) and EN (ethylenediamine) leads to a decrease of the BET surface area and pore volume. Yet, water adsorption isotherms of the modified compounds MIL-100(Cr)-EG, MIL-100(Cr)-DEG and MIL-100(Cr)-EN show a favored uptake of water at lower partial pressures and no loss of total water uptake capacity compared to non-modified MIL-100(Cr). The reduction in surface area is offset by an increased hydrophilicity and an advantageous smaller pore size for the adsorption of water. MIL-100(Cr) is therefore very promising as a water sorption material, e.g., for heat-transformation applications. (C) 2013 Elsevier B.V. All rights reserved.
引用
收藏
页码：145 / 152
页数：8
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