以CTAB为表面活性剂、正丁醇为助表面活性剂、正辛烷为油相，通过反相微乳液法制备了纳米级ZIF-8晶体。研究了H₂O/CTAB摩尔比、2Ml/Zn²⁺摩尔比和合成时间对制备ZIF-8晶体形貌及尺寸大小的影响。结果表明，在H₂O/CTAB摩尔比为30、2Ml/Zn²⁺摩尔比为4、反应时间为1 h条件下，所制得的ZIF-8晶体形貌规则呈球状，结晶度高，粒径大小均一，约为100 nm；并随着2Ml/Zn²⁺摩尔比由3.5增加为8时，ZIF-8晶体尺寸逐渐降低，由120 nm下降为50 nm；此外，ZIF-8纳米晶体尺寸及形貌不随反应时间的延长而发生明显变化。

ZIF-8 nanocrystals are prepared through the reverse microemulsion method using CTAB as an anionic surfactant, n-butanol as a cosurfactant and n-octane as an oil phase.The effects of molar ratio of H₂O/CTAB, molar ratio of 2Ml/Zn²⁺ and synthetic time on the morphology and size of the as-synthesized ZIF-8crystals are systematically investigated.It is found that the prepared ZIF-8 crystal exhibits sphere-like morphology, high crystallinity, uniform-sized particles with diameter about 100 nm when the molar ratio of H₂O/CTAB is 30, the molar ratio of 2Ml/Zn²⁺ is 4 and reaction lasts for 1 h.As the molar ratio of 2Ml/Zn²⁺ increases from 3.5 to 8, the size of the as-synthesized ZIF-8 crystals decrease gradually, from 120 nm to 50 nm.Moreover, with the reaction time extending, the morphology and size of ZIF-8 nanocrystals change hardly.

殷慧敏(1986-),女,博士,工程师,研究方向为高新分离膜的制备及产品检验检测,xjyhm8@126.com。