Zeolitic imidazolate framework-90 (ZIF-90) synthesized by solvothermal method reveals large BET surface area and high n-hexane vapor adsorption capacity. However, the adsorption rate and efficiency for n-hexane vapor are far from expectation, which affect the industrial applications. Thus, a green and efficient method using triethylamine (TEA) was developed to prepare a new ZIF-90 with large pore diameter to increase the adsorption rate and efficiency dramatically. Notably, the average pore diameter of the new ZIF-90 was up to 3.66 nm, which was more than twice larger than that reported one using previous method. On the other hand, the resulting samples with larger pore limited the adsorption capacity for n-hexane vapor. Therefore, graphene oxide (GO) was further employed as filler to modify the ZIF-90 based on its high BET surface area and thermal conductivity. The resulting ZIF-90/GO composite with both higher adsorption capacity and rate for n-hexane vapor was optimized, which was 72% and 11% higher than that of the pristine ZIF-90, respectively. More importantly, the ZIF-90/GO composite possessed a more stable structure for n-hexane vapor adsorption, which endowed it a potential prospect in the purification field.

溶剂热法合成的沸石咪唑酸盐骨架-90（ZIF-90）具有较大的BET表面积和较高的正己烷蒸气吸附能力。然而，正己烷蒸气的吸附速率和效率远未达到预期，这影响了工业应用。因此，开发了一种使用三乙胺（TEA）的绿色高效方法来制备具有大孔径的新型ZIF-90，以显着提高吸附速率和效率。值得注意的是，新型ZIF-90的平均孔径最大为3.66 nm，比使用先前方法报道的平均孔径大两倍以上。另一方面，所得的具有较大孔的样品限制了对正己烷蒸气的吸附能力。所以，氧化石墨烯（GO）进一步被用作填料，基于ZIF-90的高BET表面积和热导率对其进行改性。对所得的ZIF-90 / GO复合材料进行了优化，对正己烷蒸气的吸附能力和吸附率均比原始ZIF-90高72％和11％。更重要的是，ZIF-90 / GO复合材料具有更稳定的正己烷蒸气吸附结构，这为其在纯化领域的应用提供了潜在的前景。