Rapid microwave synthesis of sustainable magnetic framework composites of UTSA-16(Zn) with Fe 3 O 4 nanoparticles for efficient CO 2 capture
Rapid microwave synthesis of sustainable magnetic framework composites of UTSA-16(Zn) with Fe 3 O 4 nanoparticles for efficient CO 2 capture
复制标题
快速微波合成 UTSA-16(Zn) 与 Fe 3 O 4 纳米颗粒的可持续磁性框架复合材料，用于高效捕获 CO 2
DOI：
10.1039/d3ma00351e
复制
发表时间：
2023
影响因子：
5
通讯作者：
Woodliffe J
中科院分区：
文献类型：
--
作者：
Woodliffe J
金属-有机骨架材料（MOFs）由于其高的吸附容量和选择性而在二氧化碳捕集应用中显示出优异的潜力。然而，MOFs通常是绝热的，因此热CO2再生是具有挑战性的，特别是在工业所需的大规模上。这种限制可以通过在MOF结构内包含磁性纳米颗粒来克服，从而能够使用感应加热进行快速且节能的CO2再生。为此，我们开发了新型磁性骨架复合材料（MFC），其由MOF UTSA-16（Zn）（UTSA：德克萨斯大学圣安东尼奥分校，具有柠檬酸盐连接体的Zn基MOF）和Fe 3 O 4纳米颗粒组成。我们的工作还解决了工业应用所需的MFC所面临的可持续性和可扩展性挑战，考虑使用廉价和广泛可用的材料。在这里，我们报告了一个两步程序制备的MFC。首先，一个可扩展的单步连续水热合成方法用于生产高纯度，稳定，结晶柠檬酸盐包覆的Fe 3 O 4纳米粒子（62%的产率）。与先前公布的柠檬酸盐包覆的Fe 3 O 4纳米颗粒相比，纳米颗粒表现出均匀的粒径（19 ± 11 nm）和非常高的饱和磁化强度（78 emu g−1）。接下来，通过快速微波辅助直接生长策略（10分钟）将各种浓度（2.6-18.7重量%）的这些纳米颗粒掺入UTSA-16（Zn）中以形成MFC（81-83%产率）。MFC表现出高的CO2吸附能力（2.8-3.3 mmol g−1）和可回收性。此外，MFC在施加的磁场中快速加热以释放CO2，在非常短的时间内达到再生温度（例如，在8秒内达到60 °C）。在这项工作中开发的MFCs结合了联合收割机强大的CO2吸附特性和大量的再生加热能力，同时以可扩展和可持续的方式生产。本文开发的制备MFC的方法也适用于其他M0 F，为各种可持续MFC开辟了途径，以在碳捕获和其他客体分子的触发释放方面为一系列应用提供影响。
Metal–organic frameworks (MOFs) have shown excellent potential for carbon dioxide capture applications due to their high sorption capacities and selectivities. However, MOFs are typically thermally insulating, and so thermal CO2 regeneration is challenging, especially on the large scales required in industry. This limitation can be overcome by inclusion of magnetic nanoparticles within the MOF structure, enabling rapid and energy efficient CO2 regeneration using induction heating. To this end we have developed novel magnetic framework composites (MFCs) comprised of MOF UTSA-16(Zn) (UTSA: University of Texas at San Antonio, a Zn-based MOF with citrate linkers) and Fe3O4 nanoparticles. Our work also addresses the sustainability and scalability challenges faced by MFCs required for industrial application, considering the use of inexpensive and widely-available materials. Herein we report a two-step procedure for preparing the MFCs. Firstly, a scalable single-step continuous hydrothermal synthesis method is used to produce highly pure, stable, and crystalline citrate-coated Fe3O4 nanoparticles (62% yield). The nanoparticles exhibit a uniform particle size (19 ± 11 nm) and a very high saturation magnetisation (78 emu g−1) compared with previously published citrate-coated Fe3O4 nanoparticles. Next, various concentrations (2.6–18.7 wt%) of these nanoparticles were incorporated into UTSA-16(Zn) via a rapid microwave-assisted direct-growth strategy (10 min) to form the MFCs (81–83% yield). The MFCs demonstrate high CO2 adsorption capacities (2.8–3.3 mmol g−1) and recyclability. In addition, the MFCs heat rapidly in an applied magnetic field for CO2 release, reaching regeneration temperatures in remarkably short times (e.g. 60 °C in 8 seconds). The MFCs developed in this work combine strong CO2 adsorption profiles and substantial regeneration heating capabilities, whilst being produced in a scalable and sustainable manner. The methods developed to prepare MFCs herein are also applicable to other MOFs, opening routes for a variety of sustainable MFCs to deliver impact for a range of applications across carbon capture and triggered release of other guest molecules.