Core-Shell Metal-Organic Frameworks with Improving Cyclic Stability for Water Adsorption

被引：1

作者：

Chen, Jiun-Jen ^{[1
]}

Chiu, Hau-Che ^{[2
]}

Chang, Chao-Wen ^{[2
]}

Shen, Chang-Yi ^{[1
]}

Kang, Yu-Hao ^{[1
]}

Chi, Heng-Yu ^{[2
]}

Chang, Chung-Kai ^{[2
]}

Chuang, Yu-Chun ^{[2
]}

Kang, Dun-Yen ^{[2
]}

机构：

[1] Ind Technol Res Inst, Green Energy & Environm Res Labs, 195,Sec 4,Chung Hsing Rd, Hsinchu 31040, Taiwan

[2] Natl Taiwan Univ, Dept Chem Engn, 1,Sec 4,Roosevelt Rd, Taipei 10617, Taiwan

来源：

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN | 2020年 / 53卷 / 08期

关键词：

Metal-Organic Frameworks; Water Adsorption; Surface Modification; Stability; ZEOLITIC IMIDAZOLATE FRAMEWORK; VAPOR SORPTION; WASTE HEAT; FABRICATION; COMPOSITES;

D O I：

10.1252/jcej.19we113

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

MIL-100(Fe) is a metal-organic framework (MOF) with high water adsorption capacity but poor stability under continuous adsorption-desorption cycling. This paper reports on a novel method for improving the cyclic adsorption stability of MIL-100(Fe) by coating it with ZIF-7 or ZIF-8 to form MOF-MOF composites. This process is meant to prevent the direct exposure of MIL-100(Fe) to moisture, and thereby extend its lifespan. The structure of resulting MIL-100(Fe)@ZIF-7 and MIL-100(Fe)@ZIF-8 was characterized using a number of solid-state techniques, including scanning electron microscopy, energy dispersive spectroscopy, FT-IR spectroscopy, and powder X-ray diffraction with synchrotron source. Pure MIL-100(Fe) and the two composites were subjected to cyclic water adsorption- desorption tests at 25 degrees C under 80% relative humidity. After 25 cycles, the water adsorption capacity of pure MIL-100(Fe) dropped by approximately 30%. The adsorption uptake of the MOFs remained almost unchanged; however, their overall adsorption capacity is slightly lower than that of pure MIL-100(Fe).

引用

页码：376 / 382

页数：7

共 38 条

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