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在EtOH/DMF/H2O(2:2:1)的混合溶剂中,以硝酸铜(Cu(NO3)2·3H2O)和异烟酸(HINA)为原料,超声制备了具有三维结构的金属-有机骨架(MOF)[Cu(INA)2·H2O]n纳米晶,并利用粉末X-射线衍射(XRD)、红外光谱(IR)、透射电子显微镜(TEM)等分别对目标产物的结构和形貌进行了表征。研究结果表明,与传统的水热/溶剂热等制备方法相比较,超声制备方法具有合成时间短(5-60min)、反应条件温和(常温常压)和反应产率高(50.9%-60.2%)等优点。相关催化动力学研究表明,所制备MOF纳米晶在乙腈和水的混合溶剂中能够选择性催化氧化苯甲醇为苯甲醛,分别研究了不同的反应温度、催化剂量以及空气流量对催化反应的影响,并初步探讨了催化反应机理。
In a mixed solvent of EtOH / DMF / H2O (2: 2: 1), Cu (NO3) 2 · 3H2O and isonicotinic acid (HINA) (MOF) [Cu (INA) 2 · H2O] n nanocrystals were synthesized and characterized by XRD, IR and TEM. Characterized. The results show that compared with the traditional preparation methods such as hydrothermal / solvothermal method, the ultrasonic preparation method has the advantages of short synthesis time (5-60min), mild reaction conditions (normal temperature and pressure) and high reaction yield (50.9% -60.2% )Etc. The relevant catalytic kinetics studies show that the prepared MOF nanocrystals can selectively catalyze the oxidation of benzyl alcohol to benzaldehyde in a mixed solvent of acetonitrile and water. The effects of different reaction temperature, catalyst amount and air flow on the catalytic reaction were studied respectively. The catalytic reaction mechanism was also discussed.