Mechanochemical synthesis of Cu-BTC@GO with enhanced water stability and toluene adsorption capacity
Mechanochemical synthesis of Cu-BTC@GO with enhanced water stability and toluene adsorption capacity
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机械化学合成具有增强水稳定性和甲苯吸附能力的Cu-BTC@GO
DOI：
10.1016/j.cej.2016.03.141
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发表时间：
2016-08-15
影响因子：
15.1
通讯作者：
Li, Zhong
中科院分区：
文献类型：
--
作者：
Li, Yujie;Miao, Jinpeng;Li, Zhong
提出了一种无溶剂机械化学方法，可在 30 分钟内快速合成 Cu-BTC 和氧化石墨的复合材料（Cu-BTC@GO）。所得复合材料通过 N-2 吸附、PXRD、SEM、FT-IR 和 TG 进行了表征。考察了其水稳定性和对甲苯蒸气的吸附性能。结果表明，机械化学法可以在不使用溶剂的情况下通过机械研磨快速制备复合材料Cu-BTC@GOs。所得Cu-BTC@GOs比母体Cu-BTC具有更高的BET比表面积和孔容，其中复合材料Cu-BTC@GO-5的比表面积最高，为1362.7 m(2)/g，总孔容为0.87 cm(3)/g，298 K时甲苯吸收量高达9.1 mmol/g，比Cu-BTC提高了47%，远高于母体Cu-BTC@GO-5的比表面积和孔容。传统的活性炭和沸石。更有趣的是，它的水稳定性大大增强。水中浸泡10 h后，Cu-BTC@GO-5仍保持其结构和孔隙率，BET比表面积仍为1205 m(2)/g。这可能归因于 GO 中的氧基团与 Cu-BTC 中的 Cu2+ 心理中心之间的协调。相比之下，水浸泡的 Cu-BTC 完全失去了结构和孔隙率。其表面积由最初的1188.3 m(2)/g急剧下降至20.7 m(2)/g,下降了98.2%。应用机械化学合成制备复合材料Cu-BTC@GOs是提高Cu-BTC吸附性能和水稳定性的有效策略。优异的水稳定性和甲苯的高吸附能力使 Cu-BTC@GOs 成为 VOC 吸附领域实际应用的有希望的候选者。 (C) 2016 Elsevier B.V. 保留所有权利。
A solvent-free mechanochemical method is proposed to quickly synthesize composites (Cu-BTC@GO) of Cu-BTC and graphite oxide within 30 min. The resulting composites were characterized by N-2 adsorption, PXRD, SEM, FT-IR and TG. Its water-stability and adsorption properties toward toluene vapor were examined. Results showed that mechanochemical method can quickly prepare the composites Cu-BTC@GOs by mechanical grinding without solvent. The resulting Cu-BTC@GOs had higher BET surface area and pore volume than the parent Cu-BTC, of which the composite Cu-BTC@GO-5 possessed the highest surface area of 1362.7 m(2)/g and total pore volume of 0.87 cm(3)/g and its toluene uptake up to 9.1 mmol/g at 298 K, having an increase of 47% in comparison with Cu-BTC, much higher than those of the conventional activated carbons and zeolites. More interestingly, its water-stability had greatly been enhanced. After soaked in water for 10 h, Cu-BTC@GO-5 still remained its structure and porosity and its BET surface area remained 1205 m(2)/g. It may be ascribed to the coordination between the oxygen groups in the GO and Cu2+ mental center in Cu-BTC. In contrast, the water-soaked Cu-BTC completely lost its structure and porosity. Its surface area decreased sharply to 20.7 m(2)/g from its initial surface area of 1188.3 m(2)/g, having a decrease of 98.2%. The application of mechanochemical synthesis to prepare composites Cu-BTC@GOs is an effective strategy for enhancing adsorption property and water-stability of Cu-BTC. The excellent water stability and high adsorption capacity of toluene would make Cu-BTC@GOs a promising candidate for practical applications in field of VOCs adsorption. (C) 2016 Elsevier B.V. All rights reserved.