Enhanced Adsorption Performance of Aromatics on a Novel Chromium-Based MIL-101@Graphite Oxide Composite
Enhanced Adsorption Performance of Aromatics on a Novel Chromium-Based MIL-101@Graphite Oxide Composite
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新型铬基 MIL-101@氧化石墨复合材料增强芳烃吸附性能
DOI：
10.1021/acs.energyfuels.7b02665
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发表时间：
2017
期刊：
影响因子：
5.3
通讯作者：
Li Zhong
中科院分区：
文献类型：
--
作者：
Sun Xuejiao;Lv Daofei;Chen Yongwei;Wu Ying;Wu Qihui;Xia Qibin;Li Zhong
合成了铬基MIL-101/氧化石墨（GO）复合材料（MIL-101@GO），并将其应用于对一系列芳烃（苯、甲苯和乙苯）的吸附性能研究。基于程序升温脱附（TPD）实验，计算了芳烃在该复合材料上的脱附活化能。结果表明，在低压下，随着碳数的增加，复合材料的芳烃吸附量增加。相反，在高压下，它们的吸附能力表现出相反的趋势。该复合物具有高的芳烃吸收率，与常规吸附剂相比高约1.8-6.0倍。芳烃的脱附活化能随芳烃碳数的增加而增加。此外，在复合材料上的吸附是高度可逆的。更重要的是，MIL-101@GO复合材料在303 K下表现出高达0.369 W/mK的增强热导率。MIL-101@GO复合材料具有高吸附容量、增强的导热性和高效的可回收性，为挥发性有机化合物吸附领域的实际应用提供了有希望的候选者。
Chromium-based MIL-101 and graphite oxide (GO) composite (MIL-101@GO) was synthesized and applied for adsorption performances toward a series of aromatics (benzene, toluene, and ethylbenzene). Desorption activation energies of aromatics on this composite were evaluated based on temperature-programmed desorption (TPD) experiments. The results indicated that the aromatic uptakes on the composite increase with the carbon number at low pressure. In contrast, at high pressure, their adsorption capacities exhibit an opposite trend. The composite possesses high uptakes of the aromatics, which are approximately 1.8–6.0 times higher compared with conventional adsorbents. The desorption activation energies of the aromatics increase with the carbon number of aromatics. Additionally, the adsorption of ethylbenzene on the composite is highly reversible. More importantly, the MIL-101@GO composite exhibits enhanced thermal conductivity up to 0.369 W/mK at 303 K. The MIL-101@GO composite with high adsorption capacity, enhanced thermal conductivity, and efficient recyclability provided a promising candidate for practical applications in field of volatile organic compounds adsorption.