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Ultrahigh adsorption capacities of carbon tetrachloride on MIL-101 and MIL-101/graphene oxide composites
Microporous and Mesoporous Materials ( IF 4.8 ) Pub Date : 2017-12-09 , DOI: 10.1016/j.micromeso.2017.12.007
Yue Zheng , Fuchen Chu , Bing Zhang , Jun Yan , Yunlin Chen

Hybrid composites of MIL-101(Cr) and graphene oxide (GrO) were prepared using a hydrothermal synthesis method. The synthesized materials were characterized using scanning electron microscopy, X-ray diffraction, FT-IR spectroscopy, thermal analysis and nitrogen adsorption. Results indicated that the specific area and pore volume of MIL-101/GrO-0.25 was much higher than pure MIL-101, and the adsorption capacities of carbon tetrachloride on the MIL-101 (Cr)/GrO was also higher than MIL-101. Moreover, the Langmuir-Freundlich (L-F) equation gave a well fit to the adsorption isotherm data of carbon tetrachloride. The result showed that the adsorption capacity of carbon tetrachloride on the MIL-101 at 303 K was 2044.4 mg/g, and the adsorbing amount on the MIL-101/GrO-0.25 was up to 2368.1 mg/g, which increased by 16% in comparison with the original MIL-101. The synthesized MIL-101/GrO composites exhibited a higher carbon tetrachloride uptake capacity than normal MIL-101 owing to the increasing of specific area, dispersion forces and defects on the crystal surface. Furthermore, the carbon tetrachloride uptakes of MIL-101 and MIL-101/GrO composites were well above those of conventional adsorbents, such as activated carbons and zeolites. It was demonstrated that the MIL-101 and MIL-101/GrO composite are promising adsorbents for application in the field of chlorinated volatile organic compounds (Cl-VOCs) adsorption.



中文翻译:

四氯化碳在MIL-101和MIL-101 /氧化石墨烯复合材料上的超高吸附能力

采用水热合成法制备了MIL-101(Cr)和氧化石墨烯(GrO)的杂化复合材料。使用扫描电子显微镜,X射线衍射,FT-IR光谱,热分析和氮吸附对合成的材料进行表征。结果表明,MIL-101 / GrO-0.25的比表面积和孔容远高于纯MIL-101,四氯化碳在MIL-101(Cr)/ GrO上的吸附容量也高于MIL-101 。此外,Langmuir-Freundlich(LF)方程与四氯化碳的吸附等温线数据非常吻合。结果表明,303 K下四氯化碳在MIL-101上的吸附容量为2044.4 mg / g,在MIL-101 / GrO-0.25上的吸附量高达2368.1 mg / g,与原始的MIL-101相比增加了16%。由于比表面积,分散力和晶体表面缺陷的增加,合成的MIL-101 / GrO复合材料比普通的MIL-101表现出更高的四氯化碳吸收能力。此外,MIL-101和MIL-101 / GrO复合材料的四氯化碳吸收量远高于传统吸附剂(如活性炭和沸石)的四氯化碳吸收量。结果表明,MIL-101和MIL-101 / GrO复合材料是有希望的吸附剂,可用于氯化挥发性有机化合物(Cl-VOCs)吸附领域。MIL-101和MIL-101 / GrO复合材料的四氯化碳吸收量远高于传统吸附剂(如活性炭和沸石)的四氯化碳吸收量。结果表明,MIL-101和MIL-101 / GrO复合材料是有希望的吸附剂,可用于氯化挥发性有机化合物(Cl-VOCs)吸附领域。MIL-101和MIL-101 / GrO复合材料的四氯化碳吸收量远高于传统吸附剂(如活性炭和沸石)的四氯化碳吸收量。结果表明,MIL-101和MIL-101 / GrO复合材料是有希望的吸附剂,可用于氯化挥发性有机化合物(Cl-VOCs)吸附领域。

更新日期:2017-12-09
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