Optimizing doped graphene oxide in Mg-MOF-74 to enhance its stability and CO2 adsorption and separation performance

IF 4.6 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Science and Engineering: B Pub Date : 2025-09-11 DOI:10.1016/j.mseb.2025.118788

Haoyue Deng , Tiehu Li , Hao Li , Alei Dang , Yongkang Han

{"title":"Optimizing doped graphene oxide in Mg-MOF-74 to enhance its stability and CO2 adsorption and separation performance","authors":"Haoyue Deng , Tiehu Li , Hao Li , Alei Dang , Yongkang Han","doi":"10.1016/j.mseb.2025.118788","DOIUrl":null,"url":null,"abstract":"<div><div>In this study, a composite material composed of Mg-MOF-74 and graphene oxide (GO) was synthesized to overcome MOFs’ limitations in CO<sub>2</sub> capture. At 273 K/101 kPa, the Mg-MOF-74 composite containing 6 wt% GO achieved 3.46 mmol/g CO<sub>2</sub> uptake and 114.4 CO<sub>2</sub>/N<sub>2</sub> selectivity, demonstrating 25.8 % and 29.3 % enhancements compared with pristine Mg-MOF-74. This enhancement is due to the optimization of CO<sub>2</sub> adsorption by the new pores formed at the interface and the strong affinity of GO functional groups for CO<sub>2</sub> molecules. Furthermore, due to the excellent properties of GO and its strong interaction with Mg-MOF-74, the composites show notable improvements in thermal, adsorption–desorption cycling, and moisture stability. Notably, the Mg-MOF-74 composite containing 6 wt% urea-modified GO exhibits optimal CO<sub>2</sub> adsorption/stability. This is not only due to the synergy between GO and Mg-MOF-74, but also because the amine groups and polar C<img>O bonds in urea can boost adsorption/separation and enhance stability through amine-Mg<sup>2+</sup> coordination. These findings highlight Mg-MOF-74@GO composites as promising candidates for industrial CO<sub>2</sub> capture.</div></div>","PeriodicalId":18233,"journal":{"name":"Materials Science and Engineering: B","volume":"323 ","pages":"Article 118788"},"PeriodicalIF":4.6000,"publicationDate":"2025-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Materials Science and Engineering: B","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0921510725008128","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}

引用次数: 0

Abstract

In this study, a composite material composed of Mg-MOF-74 and graphene oxide (GO) was synthesized to overcome MOFs’ limitations in CO₂ capture. At 273 K/101 kPa, the Mg-MOF-74 composite containing 6 wt% GO achieved 3.46 mmol/g CO₂ uptake and 114.4 CO₂/N₂ selectivity, demonstrating 25.8 % and 29.3 % enhancements compared with pristine Mg-MOF-74. This enhancement is due to the optimization of CO₂ adsorption by the new pores formed at the interface and the strong affinity of GO functional groups for CO₂ molecules. Furthermore, due to the excellent properties of GO and its strong interaction with Mg-MOF-74, the composites show notable improvements in thermal, adsorption–desorption cycling, and moisture stability. Notably, the Mg-MOF-74 composite containing 6 wt% urea-modified GO exhibits optimal CO₂ adsorption/stability. This is not only due to the synergy between GO and Mg-MOF-74, but also because the amine groups and polar CO bonds in urea can boost adsorption/separation and enhance stability through amine-Mg²⁺ coordination. These findings highlight Mg-MOF-74@GO composites as promising candidates for industrial CO₂ capture.

查看原文本刊更多论文

优化Mg-MOF-74中掺杂氧化石墨烯，提高其稳定性和CO2吸附分离性能

在这项研究中，合成了一种由Mg-MOF-74和氧化石墨烯（GO）组成的复合材料，以克服mof在CO2捕获方面的局限性。在273 K/101 kPa下，含有6 wt% GO的Mg-MOF-74复合材料的CO2吸收量为3.46 mmol/g， CO2/N2选择性为114.4，与原始Mg-MOF-74相比，分别提高了25.8%和29.3%。这种增强是由于界面上形成的新孔优化了CO2的吸附，以及GO官能团对CO2分子的强亲和力。此外，由于氧化石墨烯的优异性能及其与Mg-MOF-74的强相互作用，复合材料在热、吸附-解吸循环和水分稳定性方面表现出显著的改善。值得注意的是，含有6 wt%尿素修饰氧化石墨烯的Mg-MOF-74复合材料具有最佳的二氧化碳吸附/稳定性。这不仅是因为氧化石墨烯和Mg-MOF-74之间的协同作用，还因为尿素中的胺基和极性CO键可以通过胺- mg2 +配位促进吸附/分离并增强稳定性。这些发现突出了Mg-MOF-74@GO复合材料作为工业二氧化碳捕获的有希望的候选者。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Materials Science and Engineering: B 工程技术-材料科学：综合

CiteScore

5.60

自引率

2.80%

发文量

481

审稿时长

3.5 months

期刊介绍： The journal provides an international medium for the publication of theoretical and experimental studies and reviews related to the electronic, electrochemical, ionic, magnetic, optical, and biosensing properties of solid state materials in bulk, thin film and particulate forms. Papers dealing with synthesis, processing, characterization, structure, physical properties and computational aspects of nano-crystalline, crystalline, amorphous and glassy forms of ceramics, semiconductors, layered insertion compounds, low-dimensional compounds and systems, fast-ion conductors, polymers and dielectrics are viewed as suitable for publication. Articles focused on nano-structured aspects of these advanced solid-state materials will also be considered suitable.