Incorporation of Alkylamine into Metal–Organic Frameworks through a Brønsted Acid–Base Reaction for CO2 Capture,ChemSusChem

当前位置： X-MOL 学术 › ChemSusChem › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Incorporation of Alkylamine into Metal–Organic Frameworks through a Brønsted Acid–Base Reaction for CO2 Capture
ChemSusChem ( IF 7.5 ) Pub Date : 2016-09-01 , DOI: 10.1002/cssc.201600768
Hao Li ₁ , Kecheng Wang ₁ , Dawei Feng ₁ , Ying-Pin Chen _{1,

2} , Wolfgang Verdegaal ₃ , Hong-Cai Zhou _{1,

2}

Affiliation

The escalating atmospheric CO₂ concentration is one of the most urgent environmental concerns of our age. To effectively capture CO₂, various materials have been studied. Among them, alkylamine‐modified metal–organic frameworks (MOFs) are considered to be promising candidates. In most cases, alkylamine molecules are integrated into MOFs through the coordination bonds formed between open metal sites (OMSs) and amine groups. Thus, the alkylamine density, as well as the corresponding CO₂ uptake in MOFs, are severely restricted by the density of OMSs. To overcome this limit, other approaches to incorporating alkylamine into MOFs are highly desired. We have developed a new method based on Brønsted acid–base reaction to tether alkylamines into Cr‐MIL‐101‐SO₃H for CO₂ capture. A systematic optimization of the amine tethering process was also conducted to maximize the CO₂ uptake of the modified MOF. Under the optimal amine tethering condition, the obtained tris(2‐aminoethyl)amine‐functionalized Cr‐MIL‐101‐SO₃H (Cr‐MIL‐101‐SO₃H‐TAEA) has a cyclic CO₂ uptake of 2.28 mmol g⁻¹ at 150 mbar and 40 °C, and 1.12 mmol g⁻¹ at 0.4 mbar and 20 °C. The low‐cost starting materials and simple synthetic procedure for the preparation of Cr‐MIL‐101‐SO₃H‐TAEA suggest that it has the potential for large‐scale production and practical applications.

中文翻译：

通过布朗斯台德酸碱反应将烷基胺掺入金属有机骨架中以捕集二氧化碳

不断增长的大气中CO ₂浓度是我们这个时代最紧迫的环境问题之一。为了有效地捕获CO ₂，已经研究了各种材料。其中，烷基胺改性的金属有机骨架（MOF）被认为是很有前途的候选者。在大多数情况下，烷基胺分子通过在开放金属位点（OMS）和胺基团之间形成的配位键整合到MOF中。因此，OMS的密度严重限制了MOF中的烷基胺密度以及相应的CO ₂吸收。为了克服该限制，非常需要将烷基胺结合到MOF中的其他方法。我们已经开发了一种基于布朗斯台德酸碱反应将烷基胺拴系到Cr-MIL-101-SO中的新方法₃ H用于CO ₂捕获。还进行了胺系链工艺的系统优化，以使改性MOF的CO ₂吸收最大化。在最佳胺束缚条件下，获得的三（2-氨基乙基）胺官能化的Cr-MIL-101-SO ₃ H（Cr-MIL-101-SO ₃ H-TAEA）的循环CO ₂吸收量为2.28 mmol g ^-1在150毫巴和40℃，和1.12毫摩尔克^-1在0.4毫巴和20℃。制备Cr-MIL-101-SO ₃ H-TAEA的低成本起始原料和简单的合成程序表明，它具有大规模生产和实际应用的潜力。

更新日期：2016-09-01

点击分享查看原文

点击收藏

公开下载

阅读更多本刊新发论文本刊介绍/投稿指南