Abstract Defect-free UiO-66-NH2 membranes with high performance were prepared on the inner side of porous tubular α-alumina substrates modified with a thin layer of zirconia and were explored for the deep desulfurization of model gasoline via pervaporation. The deliberate modification of the α-Al2O3 substrates with zirconia (ZrO2) sol greatly favors the formation of high-quality UiO-66-NH2 membranes. The effects of different phase states of ZrO2 on the growth of UiO-66-NH2 membranes were discussed. The effects of membrane polarity and pore diameter on the gasoline desulfurization were investigated by comparing the PV results of different UiO-66 series membranes. It has been found that UiO-66-NH2 membranes derived from tetragonal zirconia layer exhibit outstanding performance in pervaporation desulfurization, showing a flux of 2.16 kg m−2 h−1 and an enrichment factor of 17.86 along with high reproducibility for n-octane containing 1312 ppm thiophene as model gasoline at 40 °C. Besides, the influences of operation temperature and feed concentration on the PV performance of UiO-66-NH2 membranes were also investigated in detail. More importantly, due to the zirconia modification layer acting as strong anchoring sites between the membrane and substrate, UiO-66-NH2 membranes demonstrate excellent stability in model gasoline, thus showing the potential for the application in practical gasoline desulfurization.

中文翻译：

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氧化锆诱导合成的高性能 UiO-66-NH 2 管式膜用于通过渗透汽化脱硫模型汽油

摘要 在氧化锆薄层改性的多孔管状α-氧化铝基材的内侧制备了高性能无缺陷的UiO-66-NH2膜，探索了模型汽油渗透汽化深度脱硫的可行性。用氧化锆 (ZrO2) 溶胶对 α-Al2O3 基材进行刻意修饰极大地促进了高质量 UiO-66-NH2 膜的形成。讨论了ZrO2不同相态对UiO-66-NH2膜生长的影响。通过比较不同UiO-66系列膜的PV结果，研究了膜极性和孔径对汽油脱硫的影响。已经发现，衍生自四方氧化锆层的UiO-66-NH2膜在渗透蒸发脱硫中表现出优异的性能，通量为2。16 kg m-2 h-1 和 17.86 的富集因子以及在 40 °C 下作为模型汽油的含有 1312 ppm 噻吩的正辛烷的高重现性。此外，还详细研究了操作温度和进料浓度对UiO-66-NH2膜PV性能的影响。更重要的是，由于氧化锆改性层作为膜和基材之间的强锚定点，UiO-66-NH2膜在模型汽油中表现出优异的稳定性，从而显示出在实际汽油脱硫中的应用潜力。还详细研究了操作温度和进料浓度对UiO-66-NH2膜PV性能的影响。更重要的是，由于氧化锆改性层作为膜和基材之间的强锚定点，UiO-66-NH2膜在模型汽油中表现出优异的稳定性，从而显示出在实际汽油脱硫中的应用潜力。还详细研究了操作温度和进料浓度对UiO-66-NH2膜PV性能的影响。更重要的是，由于氧化锆改性层作为膜和基材之间的强锚定点，UiO-66-NH2膜在模型汽油中表现出优异的稳定性，从而显示出在实际汽油脱硫中的应用潜力。