Abstract

Sub 2-μm monodisperse mesoporous silica spheres (MMSS) were synthesized using a mixed template system in a MeOH/H₂O solution. 1-Dodecylamine (DDA) and polymeric type Jeffamine surfactants, including D2000, D4000, and T5000, were employed as templates. These mixed template syntheses realized to gain MMSS materials with good spherical shape and uniform particle size. When the MeOH/H₂O (v/v) ratio was controlled between 2.5:1 and 3.0:1, mesoporous silica spheres of 2.10–2.35 μm with excellent dispersibility can be obtained. Depending on the surfactant chain length of Jeffamine, hydrothermal aging pH (4–9), time (12–24 h), and temperature (80–140 °C), MMSS with large-pore sizes (up to 14.3 nm), surface areas (153–791 m²/g), and pore volumes (0.47–1.28 cm³/g) can be synthesized.

中文翻译：

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双模板溶胶-凝胶法控制单分散二氧化硅颗粒的孔径

摘要

使用混合模板系统在MeOH / H ₂ O溶液中合成亚2μm单分散介孔二氧化硅球（MMSS）。使用1-十二烷基胺（DDA）和聚合型Jeffamine表面活性剂（包括D2000，D4000和T5000）作为模板。这些混合的模板合成实现了获得具有良好球形和均匀粒度的MMSS材料。当MeOH / H ₂ O（v / v）的比例控制在2.5：1和3.0：1之间时，可以获得具有出色分散性的2.10–2.35μm的介孔二氧化硅球。取决于Jeffamine的表面活性剂链长，水热老化pH（4–9），时间（12–24 h）和温度（80–140°C），大孔径MMSS（最大14.3 nm），表面面积（153–791 m ² / g）和孔体积（0.47–1.28 cm³ / g）可以合成。