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首页> 外文期刊>Microporous and mesoporous materials: The offical journal of the International Zeolite Association >Synthesis and CO2 adsorption property of amino-functionalized silica nanospheres with centrosymmetric radial mesopores
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Synthesis and CO2 adsorption property of amino-functionalized silica nanospheres with centrosymmetric radial mesopores

机译：中心对称径向介孔的氨基官能化二氧化硅纳米球的合成及CO2吸附性能

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摘要

Amino-functionalized silica nanospheres with centrosymmetric radial mesopores were successfully prepared using the anionic surfactant N-lauroylsarcosine sodium (Sar-Na) as template and 3-aminopropyl-trimethoxysilane (APMS) as co-structure directing agent. The template was efficiently removed by extraction either using a basic solution of monoethanol amine (MEA) in ethanol or an acetonitrile solution acidified with HCl. The synthesized mesoporous silica materials were characterized by the FT-IR, TG-DTA, XRD, N2 adsorption-desorption and TEM techniques. CO2 adsorption at 25 °C was evaluated by a volumetric method, and CO2 desorption was studied by the TPD technique. The results indicate that, compared to the sorbent treated with acidic-acetonitrile, the sorbent treated with the MEA-ethanol solution has a much higher adsorption capacity towards CO2, exhibits a higher degree of reversibility in the adsorption process, and has a much higher CO2/N2 selectivity.
机译：以阴离子表面活性剂N-月桂酰肌氨酸钠（Sar-Na）为模板，3-氨基丙基-三甲氧基硅烷（APMS）为共结构导向剂，成功制备了具有中心对称径向介孔的氨基官能化二氧化硅纳米球。通过使用单乙醇胺（MEA）的乙醇碱性溶液或HCl酸化的乙腈溶液进行萃取，可以有效地去除模板。用FT-IR，TG-DTA，XRD，N2吸附-脱附和TEM技术对合成的介孔二氧化硅材料进行了表征。通过体积法评估在25°C下的CO2吸附，并通过TPD技术研究CO2的脱附。结果表明，与用酸性乙腈处理的吸附剂相比，用MEA-乙醇溶液处理的吸附剂对二氧化碳的吸附能力高得多，在吸附过程中具有更高的可逆性，并且对二氧化碳的吸附能力也更高。 / N2选择性。

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