Abstract Constructing facilitated transport pathways using two-dimensional (2D) nanosheets as building blocks is an emerging approach to achieving highly selective passage of small molecules with similar physical properties. Due to high chemical inertness and low structural defects, molybdenum disulfide (MoS2) 2D nanosheets hold great promise in a broad range of molecular separation applications. In this study, MoS2 nanosheets were incorporated in Pebax matrix to remove thiophene from the n-octane-thiophene mixture. The moderate binding energy of thiophene on the basal plane of MoS2 enabled the construction of continuous facilitated transport pathways on the MoS2 nanosheet for rapid diffusion of thiophene molecules. When the content of MoS2 in the hybrid membrane was 4 wt%, the membrane displayed an optimum desulfurization performance with a permeation flux of 11.42 kg/ (m2 h) (22.27% higher than that of Pebax membrane) and an enrichment factor of 9.11 (65.94% higher than that of Pebax membrane) at 60 °C with a feed solution containing 1312 ppm thiophene. This study is the first attempt of using MoS2 nanosheets in pervaporative separations of small molecules liquid mixture, which may open a novel avenue to constructing facilitated transport pathway within membranes for efficient molecular sieving.

中文翻译：

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通过结合MoS 2 纳米片在杂化膜中构建促进运输途径

摘要 使用二维 (2D) 纳米片作为构建块构建促进运输途径是实现具有相似物理特性的小分子的高度选择性通过的新兴方法。由于高化学惰性和低结构缺陷，二硫化钼 (MoS2) 二维纳米片在广泛的分子分离应用中具有广阔的前景。在这项研究中，MoS2 纳米片被掺入 Pebax 基质中以从正辛烷-噻吩混合物中去除噻吩。噻吩在 MoS2 基面上的适度结合能能够在 MoS2 纳米片上构建连续的促进传输途径，用于噻吩分子的快速扩散。当混合膜中 MoS2 的含量为 4 wt% 时，该膜表现出最佳的脱硫性能，在 60 °C 下，渗透通量为 11.42 kg/（m2 h）（比 Pebax 膜高 22.27%），富集系数为 9.11（比 Pebax 膜高 65.94%）。含有 1312 ppm 噻吩的进料溶液。这项研究是首次尝试使用 MoS2 纳米片对小分子液体混合物进行渗透蒸发分离，这可能为在膜内构建促进传输途径以实现有效的分子筛分开辟了一条新途径。