等离子体辅助快速合成磁性Fe3O4/NaA复合材料及其CO2吸附性能

吸附法是捕集分离CO₂等温室气体的重要方法，磁性复合材料能实现气固相快速分离而备受关注。本文利用介质阻挡放电等离子体处理方法，分别对磁性Fe₃O₄和分子筛前体进行处理，再通过水热法快速制备了Fe₃O₄/NaA复合材料。利用X射线衍射、红外光谱、扫描电镜和元素扫描等技术进行了表征，并考察了复合材料中Fe₃O₄/NaA含量比对CO₂吸附性能和磁性能的影响。结果显示，当Fe₃O₄的质量分数为23.2％时，Fe₃O₄/NaA复合材料既具有优异CO₂吸附能力（2.10mmol/g），又具有较好的磁性（25.92emu/g），同时CO₂吸附-脱附循环稳定性高，是一种新型磁性CO₂吸附剂。在采用流化床吸附捕集CO₂技术中，有望实现气固高效磁分离。

Ultrafast synthesis of magnetic Fe3O4/NaA composites through plasma treatment for CO2 capture

Adsorption is an important method for CO₂ capture and separation. Recently, magnetic composites have attracted much attention for their ability to achieve rapid gas-solid separation. Herein, Fe₃O₄/NaA composites were rapidly synthesized by the hydrothermal method using dielectric barrier discharge (DBD) treatments for magnetic Fe₃O₄ nanoparticles and NaA sieve precursors, respectively. By using characteristics of X-ray diffraction, FTIR, SEM and SEM-EDS, the structure properties of composites were demonstrated. Meanwhile, the effect of the molar ratio of Fe₃O₄/NaA in composites on their CO₂ adsorption capacity and magnetic property were investigated. It was found that when the mass fraction of Fe₃O₄ was 23.2%, the Fe₃O₄/NaA composite showed both excellent CO₂ adsorption capacity （2.10mmol/g） and magnetic properties (25.92emu/g). More importantly, with good cycle stability of CO₂ adsorption, Fe₃O₄/NaA composite provided an excellent magnetic CO₂ adsorbent for potential fast magnetic gas-solid separation in the fluidized bed for CO₂ capture.