{"title":"Study on the adsorption performance of toluene by bimetallic doped MOFs with high adsorption capacity","authors":"Yunxia Li, Jiawei Cao, Qingqing Liu, Xinru Hu, Yongqiang Wang, Fang Liu","doi":"10.1016/j.molstruc.2024.140912","DOIUrl":null,"url":null,"abstract":"<div><div>In this study, Cr-MIL-101-M doped with metal ions (Ce<sup>3+</sup>, Fe<sup>3+</sup>, Al<sup>3+</sup>) was synthesized by hydrothermal method for toluene adsorption. The physical and chemical properties of the adsorbent were studied by XRD, SEM, EDS, BET, CO<sub>2</sub>-TPD, TG and other characterization methods. The results show that doping metal ions can effectively improve the toluene adsorption capacity of Cr-MIL-101, with aluminum being the optimal doping metal and the best doping ratio being 20%. Under these conditions, Cr-MIL-101- 20% Al has more basic adsorption sites, a larger specific surface area (3106.37 m²/g) and pore volume (1.85 cm³/g), which provides more active sites for toluene adsorption. Therefore, Cr-MIL-101-20%Al possesses the highest saturation adsorption capacity (486.05 mg/g). Kinetic analysis indicated that both physical and chemical adsorption significantly contributed to the uptake of toluene by bimetallic MOFs, and the doping of 20% Al markedly enhanced the adsorption rate, achieving the optimal adsorption effect.</div></div>","PeriodicalId":16414,"journal":{"name":"Journal of Molecular Structure","volume":"1324 ","pages":"Article 140912"},"PeriodicalIF":4.0000,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Molecular Structure","FirstCategoryId":"92","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0022286024034197","RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
引用次数: 0
Abstract
In this study, Cr-MIL-101-M doped with metal ions (Ce3+, Fe3+, Al3+) was synthesized by hydrothermal method for toluene adsorption. The physical and chemical properties of the adsorbent were studied by XRD, SEM, EDS, BET, CO2-TPD, TG and other characterization methods. The results show that doping metal ions can effectively improve the toluene adsorption capacity of Cr-MIL-101, with aluminum being the optimal doping metal and the best doping ratio being 20%. Under these conditions, Cr-MIL-101- 20% Al has more basic adsorption sites, a larger specific surface area (3106.37 m²/g) and pore volume (1.85 cm³/g), which provides more active sites for toluene adsorption. Therefore, Cr-MIL-101-20%Al possesses the highest saturation adsorption capacity (486.05 mg/g). Kinetic analysis indicated that both physical and chemical adsorption significantly contributed to the uptake of toluene by bimetallic MOFs, and the doping of 20% Al markedly enhanced the adsorption rate, achieving the optimal adsorption effect.
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