Effects of ammonium hydroxide on the structure and gas adsorption of nanosized Zr-MOFs (UiO-66)

被引：90

作者：

Abid, Hussein Rasool ^{[1
]}

Ang, Ha Ming ^{[1
]}

Wang, Shaobin ^{[1
]}

机构：

[1] Curtin Univ Technol, Dept Chem Engn, Perth, WA 6845, Australia

来源：

NANOSCALE | 2012年 / 4卷 / 10期

关键词：

METAL-ORGANIC FRAMEWORKS; ZIRCONIUM TEREPHTHALATE UIO-66(ZR); CARBON-DIOXIDE; CO2; CAPTURE; PORE-SIZE; FLUE-GAS; DESIGN; SELECTIVITY; PROSPECTS; METHANE;

D O I：

10.1039/c2nr30244f

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Several zirconium-based metal-organic frameworks (Zr-MOFs) have been synthesized using ammonium hydroxide as an additive in the synthesis process. Their physicochemical properties have been characterized by N-2 adsorption/ desorption, XRD, SEM, FTIR, and TGA, and their application in CO2 adsorption was evaluated. It was found that addition of ammonium hydroxide produced some effects on the structure and adsorption behavior of Zr-MOFs. The pore size and pore volume of Zr-MOFs were enhanced with the additive, however, specific surface area of Zr-MOFs was reduced. Using an ammonium hydroxide additive, the crystal size of Zr-MOF was reduced with increasing amount of the additive. All the samples presented strong thermal stability. Adsorption tests showed that capacity of CO2 adsorption on the Zr-MOFs under standard conditions was reduced due to decreased micropore fractions. However, modified Zr-MOFs had significantly lower adsorption heat. The adsorption capacity of carbon dioxide was increased at high pressure, reaching 8.63 mmol g(-1) at 987 kPa for Zr-MOF-NH4-2.

引用

页码：3089 / 3094

页数：6

共 41 条

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