室温超快速制备HKUST-1及其对甲苯的吸附性能

Rapid preparation of HKUST-1 at room temperature and its adsorption performance of toluene

摘要:

以硝酸铜和均苯三酸为原料，通过水滑石法室温（25 ℃）十秒快速制备了一种金属有机骨架材料HKUST-1，对其进行了XRD、SEM和N2吸附表征，测定了甲苯在HKUST-1上的吸附等温线、动力学和吸附-脱附循环性能。结果表明，水滑石的添加使得HKUST-1可在室温十秒内快速合成， HKUST-1的BET比表面积达到2170.7 m2/g，总孔容为0.97 cm3/g。 HKUST-1在25 ℃时对甲苯的饱和吸附量达到了6.67 mmol/g, 在低相对分压（p/p0≈0.02）下，HKUST-1对甲苯的吸附量高于其他材料约10倍。经5次吸附-脱附循环后，HKUST-1的甲苯饱和吸附量几乎不变，具有很好的再生性能。

Abstract:

By using copper nitrate and trimesic acid as raw materials, a metal organic framework material HKUST-1 is rapidly prepared by the hydrotalcite method at room temperature (25 ℃) within ten seconds, and is characterized by XRD, SEM and N2 adsorption. The adsorption isotherms, kinetics and adsorption-desorption cycle performance of toluene on the HKUST-1 are measured. The results show that the addition of hydrotalcite enables rapid synthesis of HKUST-1 within ten seconds at room temperature. The BET surface area of HKUST-1 is 2170.7 m2/g and total pore volume is 0.97 cm3/g. The saturated adsorption capacity of toluene on the material at 25 ℃ reaches 6.67 mmol/g. Under low relative partial pressure (p/p0≈0.02), the toluene adsorption capacity on the HKUST-1 is about 10 times higher than other materials. After five adsorption-desorption cycles, the toluene saturated adsorption capacity on the material is almost unchanged, and it has good regeneration performance.