Mater Sci Eng C Mater Biol Appl. 2012 Aug 1;32(6):1461-8. doi: 10.1016/j.msec.2012.04.026. Epub 2012 Apr 25.
Mesoporous materials can play a pivotal role as a host material for delivery application to a specific part of a system. In this work we explore the selective adsorption and release of cationic organic dye molecules such as safranine T (ST) and malachite green (MG) on mesoporous borosilicate materials. The mesoporous silica SBA-15 and borosilicate materials (MBS) were prepared using non-ionic surfactant Pluronic P123 as template via evaporation induced self-assembly (EISA) method. After template removal the materials show high surface areas and in some cases ordered mesopores of dimensions ca. 6-7 nm. High surface area, mesoporosity and the presence of heteroatom (boron) help this mesoporous borosilicate material to adsorb high amount of cationic dye molecules at its surface from the respective aqueous solutions. Furthermore, the mesoporous borosilicate samples containing higher percentage adsorbed dyes show excellent release of ST or MG dye in simulated body fluid (SBF) solution at physiological pH=7.4 and temperature 310 K. The adsorption and release efficiency of mesoporous borosilicate samples are compared with reference boron-free mesoporous pure silica material to understand the nature of adsorbate-adsorbent interaction at the surfaces.
介孔材料可以作为一种主体材料，在系统的特定部分发挥传递应用的关键作用。在这项工作中，我们探索了阳离子有机染料分子如碱性藏红 T（ST）和孔雀石绿（MG）在介孔硼硅酸盐材料上的选择性吸附和释放。介孔硅 SBA-15 和硼硅酸盐材料（MBS）是通过蒸发诱导自组装（EISA）方法使用非离子表面活性剂 Pluronic P123 作为模板制备的。模板去除后，这些材料表现出高比表面积，在某些情况下具有约 6-7nm 的有序介孔。高比表面积、介孔性和杂原子（硼）的存在有助于这种介孔硼硅酸盐材料从相应的水溶液中在其表面吸附大量的阳离子染料分子。此外，在生理 pH=7.4 和温度 310K 的模拟体液（SBF）溶液中，含有更高百分比吸附染料的介孔硼硅酸盐样品显示出 ST 或 MG 染料的优异释放。介孔硼硅酸盐样品的吸附和解吸效率与参考无硼介孔纯硅材料进行了比较，以了解表面上吸附剂-吸附剂相互作用的性质。
