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Nut-like MOF/hydroxylated graphene hybrid materials for adsorptive desulfurization of thiophene

机译：用于噻吩吸附脱硫的坚果状MOF /羟基化石墨烯杂化材料

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Nowadays, sulfur compounds in fuel oils are the main source of environmental pollution and ultra-deep desulfurization of fuel oils has become a top priority. Many porous materials such as activated carbon and metal–organic frameworks (MOFs) have attracted attention in the field of adsorption desulfurization in recent years. A series of novel MOF/hydroxylated graphene hybrid materials were successfully designed and synthesized with different ratios for application in the field of ADS. The hydroxylated graphene (HG) was found dispersed not just on the surface but also inserted in the MOF crystals in what we call a nut-like structure. It was found that the introduction of a small amount (<8%) of HG does not hinder the formation of the Cu-BTC structure. Meanwhile, the adsorption performances of these composites for thiophene from oils were evaluated using batch adsorption tests at room temperature. The synergistic effect between Cu-BTC and HG in the hybrid materials can improve the adsorption capacity for thiophene molecules. The experimental equilibrium curve fitted well with the theoretical Langmuir isotherm model. The maximum sulfur adsorption capacity of 35.6 mg S g ~(?1) for the hybrid materials was calculated using the Langmuir adsorption equation, which increased by 48% compared to parent Cu-BTC. Thus, these hybrid materials have great potential for application in the adsorptive desulfurization process, especially for thiophenic compounds.
机译：如今，燃料油中的硫化合物已成为环境污染的主要来源，燃料油的超深度脱硫已成为当务之急。近年来，许多多孔材料，例如活性炭和金属有机骨架（MOF），在吸附脱硫领域引起了关注。成功设计并合成了不同比例的一系列新型MOF /羟基化石墨烯杂化材料，用于ADS领域。发现羟基化的石墨烯（HG）不仅分散在表面上，而且以所谓的坚果状结构插入到MOF晶体中。发现少量（＜8％）的HG的引入不妨碍Cu-BTC结构的形成。同时，在室温下使用分批吸附试验评估了这些复合材料对油脂中噻吩的吸附性能。 Cu-BTC与HG在杂化材料中的协同作用可以提高噻吩分子的吸附能力。实验平衡曲线与理论Langmuir等温线模型非常吻合。使用Langmuir吸附方程计算出杂化材料的最大硫吸附能力为35.6 mg S g〜（？1），与母体Cu-BTC相比增加了48％。因此，这些杂化材料在吸附脱硫过程中，特别是噻吩化合物的应用中具有很大的潜力。

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