State Key Lab of Transducer Technology, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences , 865 Changning Road, Shanghai 200050, China.
Anal Chem. 2016 May 3;88(9):4903-8. doi: 10.1021/acs.analchem.6b00757. Epub 2016 Apr 21.
Activation-energy (Ea) value for trace-amount adsorption of gas molecules on material is rapidly and inexpensively obtained, for the first time, from a microgravimetric analysis experiment. With the material loaded, a resonant microcantilever is used to record in real time the adsorption process at two temperatures. The kinetic parameter Ea is thereby extracted by solving the Arrhenius equation. As an example, two CO2 capture nanomaterials are examined by the Ea extracting method for evaluation/optimization and, thereby, demonstrating the applicability of the microgravimetric analysis method. The achievement helps to solve the absence in rapid quantitative characterization of sorption kinetics and opens a new route to investigate molecule adsorption processes and materials.
首次通过微重力分析实验，快速且经济地获得了材料对痕量气体分子吸附的活化能(Ea)值。在加载材料的情况下，使用共振微悬臂梁实时记录两个温度下的吸附过程。通过求解阿累尼乌斯方程提取动力学参数 Ea。作为示例，通过 Ea 提取方法对两种 CO2 捕获纳米材料进行了评估/优化，从而证明了微重力分析方法的适用性。这一成果有助于解决吸附动力学快速定量表征的缺失问题，并为研究分子吸附过程和材料开辟了新途径。
