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Facile Fabrication and Characterization of Amine-Functional Silica Coated Magnetic Iron Oxide Nanoparticles for Aqueous Carbon Dioxide Adsorption
ACS Omega ( IF 4.1 ) Pub Date : 2024-05-02 , DOI: 10.1021/acsomega.3c10082 Md. Muhyminul Islam 1 , Md. Abdur Rahman 1 , Md. Ashraful Alam 1 , Md. Mahbubor Rahman 1 , O. Thompson Mefford 2 , Anwar Ul-Hamid 3 , Jalil Miah 1 , Hasan Ahmad 1
ACS Omega ( IF 4.1 ) Pub Date : 2024-05-02 , DOI: 10.1021/acsomega.3c10082 Md. Muhyminul Islam 1 , Md. Abdur Rahman 1 , Md. Ashraful Alam 1 , Md. Mahbubor Rahman 1 , O. Thompson Mefford 2 , Anwar Ul-Hamid 3 , Jalil Miah 1 , Hasan Ahmad 1
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Surface active amine-functionalized silica coated magnetic iron oxide nanoparticles were prepared by a simple two-step process for adsorbing CO2 gas from aqueous medium. First, oleic acid (OA) coated iron oxide magnetic particles (denoted as Fe3O4-OA) were prepared by a simple coprecipitation method. Then, the surface of the Fe3O4-OA particles was coated with silica by using tetraethyl orthosilicate. Finally, aminated Fe3O4/SiO2-NH2 nanoparticles were concomitantly formed by the reactions of 3-aminopropyl triethoxysilane with silica-coated particles. The formation of materials was confirmed by Fourier transform infrared spectral analysis. Transmission electron microscopic analysis revealed both spherical and needle-shaped morphologies of magnetic Fe3O4/SiO2-NH2 particles with an average size of 15 and 68.6 nm, respectively. The saturation magnetization of Fe3O4/SiO2-NH2 nanoparticles was found to be 33.6 emu g–1, measured by a vibrating sample magnetometer at ambient conditions. The crystallinity and average crystallite size (7.0 nm) of the Fe3O4/SiO2-NH2 particles were revealed from X-ray diffraction data analyses. Thermogravimetric analysis exhibited good thermal stability of the nanoadsorbent up to an elevated temperature. Zeta potential measurements revealed pH-sensitive surface activity of Fe3O4/SiO2-NH2 nanoparticles in aqueous medium. The produced magnetic Fe3O4/SiO2-NH2 nanoparticles also exhibited efficient proton capturing activity (92%). The particles were used for magnetically recyclable adsorption of aqueous CO2 at different pH values and temperatures. Fe3O4/SiO2-NH2 nanoparticles demonstrated the highest aqueous CO2 adsorption efficiency (90%) at 40 °C, which is clearly two times higher than that of nonfunctionalized Fe3O4-OA particles.
中文翻译：
用于水性二氧化碳吸附的胺功能二氧化硅涂覆的磁性氧化铁纳米粒子的简便制备和表征
通过简单的两步法制备了表面活性胺官能化二氧化硅包覆的磁性氧化铁纳米颗粒，用于从水介质中吸附CO 2气体。首先，通过简单的共沉淀法制备了油酸(OA)包覆的氧化铁磁性颗粒(记为Fe 3 O 4 -OA)。然后，通过使用原硅酸四乙酯，用二氧化硅涂覆Fe 3 O 4 -OA颗粒的表面。最后，通过3-氨丙基三乙氧基硅烷与二氧化硅包覆颗粒的反应同时形成胺化的Fe 3 O 4 /SiO 2 -NH 2纳米颗粒。通过傅里叶变换红外光谱分析证实了材料的形成。透射电子显微镜分析显示磁性Fe 3 O 4 /SiO 2 -NH 2颗粒呈球形和针状形貌，平均尺寸分别为15和68.6 nm。通过振动样品磁力计在环境条件下测量， Fe 3 O 4 /SiO 2 -NH 2纳米粒子的饱和磁化强度为33.6 emu g –1 。由X射线衍射数据分析揭示了Fe 3 O 4 /SiO 2 -NH 2颗粒的结晶度和平均微晶尺寸(7.0 nm) 。热重分析显示纳米吸附剂在高温下具有良好的热稳定性。 Zeta 电位测量揭示了水介质中Fe 3 O 4 /SiO 2 -NH 2纳米粒子的 pH 敏感表面活性。所生产的磁性Fe 3 O 4 /SiO 2 -NH 2纳米颗粒还表现出有效的质子捕获活性（92%）。该颗粒用于在不同pH值和温度下对CO 2水溶液进行磁性可回收吸附。 Fe 3 O 4 /SiO 2 -NH 2纳米颗粒在40℃下表现出最高的水性CO 2吸附效率(90%)，明显比非功能化Fe 3 O 4 -OA颗粒高两倍。
更新日期：2024-05-02
中文翻译：
用于水性二氧化碳吸附的胺功能二氧化硅涂覆的磁性氧化铁纳米粒子的简便制备和表征
通过简单的两步法制备了表面活性胺官能化二氧化硅包覆的磁性氧化铁纳米颗粒，用于从水介质中吸附CO 2气体。首先，通过简单的共沉淀法制备了油酸(OA)包覆的氧化铁磁性颗粒(记为Fe 3 O 4 -OA)。然后，通过使用原硅酸四乙酯，用二氧化硅涂覆Fe 3 O 4 -OA颗粒的表面。最后，通过3-氨丙基三乙氧基硅烷与二氧化硅包覆颗粒的反应同时形成胺化的Fe 3 O 4 /SiO 2 -NH 2纳米颗粒。通过傅里叶变换红外光谱分析证实了材料的形成。透射电子显微镜分析显示磁性Fe 3 O 4 /SiO 2 -NH 2颗粒呈球形和针状形貌，平均尺寸分别为15和68.6 nm。通过振动样品磁力计在环境条件下测量， Fe 3 O 4 /SiO 2 -NH 2纳米粒子的饱和磁化强度为33.6 emu g –1 。由X射线衍射数据分析揭示了Fe 3 O 4 /SiO 2 -NH 2颗粒的结晶度和平均微晶尺寸(7.0 nm) 。热重分析显示纳米吸附剂在高温下具有良好的热稳定性。 Zeta 电位测量揭示了水介质中Fe 3 O 4 /SiO 2 -NH 2纳米粒子的 pH 敏感表面活性。所生产的磁性Fe 3 O 4 /SiO 2 -NH 2纳米颗粒还表现出有效的质子捕获活性（92%）。该颗粒用于在不同pH值和温度下对CO 2水溶液进行磁性可回收吸附。 Fe 3 O 4 /SiO 2 -NH 2纳米颗粒在40℃下表现出最高的水性CO 2吸附效率(90%)，明显比非功能化Fe 3 O 4 -OA颗粒高两倍。
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