Abstract We investigated the adsorption of carbon dioxide (CO2) at room temperature on alkaline earth metal ion-exchanged titanate nanotubes using Fourier transform infrared (FT-IR) spectroscopy and volumetric adsorption. CO2 adsorption capabilities were found to increase with increase in the ionic radius of the alkaline earth metal ions exchanged. Alkaline earth metal ion-exchanged titanate nanotubes exhibited the characteristic IR bands responsible for the ν3 asymmetric stretching vibration of a CO2 molecule depending on the ionic radius of the alkaline earth metal ions exchanged. From the relationship between the shifted value from the free CO2 gas for the observed frequency and electrostatic field, we concluded that electrostatic forces are dominant driving forces for the interaction between CO2 and the alkaline earth metal ion-exchanged titanate nanotubes.

中文翻译：

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常温下碱土金属离子交换钛酸盐纳米管吸附二氧化碳的红外研究

摘要 我们使用傅里叶变换红外 (FT-IR) 光谱和体积吸附研究了室温下二氧化碳 (CO2) 在碱土金属离子交换钛酸盐纳米管上的吸附。发现CO 2 吸附能力随着交换的碱土金属离子的离子半径的增加而增加。碱土金属离子交换的钛酸盐纳米管表现出特征 IR 带，负责 CO2 分子的 ν3 不对称伸缩振动，这取决于交换的碱土金属离子的离子半径。从观测频率的游离 CO2 气体偏移值与静电场之间的关系，