Carbon dioxide （CO2） adsorption on a standard metal-organic framework MIL-101 and a pentaethylenehexamine modified MIL-101 （PEHA- MIL-101） are investigated and compared in this study. The adsorbent samples were ch...Carbon dioxide （CO2） adsorption on a standard metal-organic framework MIL-101 and a pentaethylenehexamine modified MIL-101 （PEHA- MIL-101） are investigated and compared in this study. The adsorbent samples were characterized by XRD, FT-IR and nitrogen adsorption- desorption isotherms analysis. CO2 adsorption capacity was measured by a volumetric method. MIL-101 and PEHA-MIL-101 exhibited CO2 adsorption capacities of 0.85 and 1.3 mmO1CO2/gadsorbent at 10 bar and 298 K, respectively. It is observed that CO2 adsorption capacity was fairly improved about 50% after amine modification.展开更多
文摘Carbon dioxide （CO2） adsorption on a standard metal-organic framework MIL-101 and a pentaethylenehexamine modified MIL-101 （PEHA- MIL-101） are investigated and compared in this study. The adsorbent samples were characterized by XRD, FT-IR and nitrogen adsorption- desorption isotherms analysis. CO2 adsorption capacity was measured by a volumetric method. MIL-101 and PEHA-MIL-101 exhibited CO2 adsorption capacities of 0.85 and 1.3 mmO1CO2/gadsorbent at 10 bar and 298 K, respectively. It is observed that CO2 adsorption capacity was fairly improved about 50% after amine modification.
文摘表面增强拉曼散射(SERS)光谱具有检测速度快,灵敏度高、样品预处理要求低等特点,在痕量有机污染物检测方面占据越来越重要的地位.本文分别用水热法和水溶液还原法制备得到MIL-101和Au纳米粒子,并利用静电相互作用制备得到MIL-101/Au复合纳米粒子.通过调节Au纳米粒子尺寸和MIL-101表面分布密度优化复合基底的SERS性能,探究了最优配比的复合基底对罗丹明6G(R6G)的检测限,低至10-11 M,证明MIL-101/Au复合纳米粒子对探针分子具有高灵敏度.并将其应用于持久性有机污染物的检测领域,对荧蒽的检测限可达10-9 M,而对3,3′,4,4′-四氯联苯(PCB-77)可达到10-5 M.
