Department of Chemistry, Capital Normal University, Beijing, 100048, China.
Sci Rep. 2017 Mar 20;7:45055. doi: 10.1038/srep45055.
Periodic mesoporous organosilicas (PMOs) nanospheres with tubular structure were prepared with compressed CO using cationic and anionic mixed surfactant (CTAB/SDS) and triblock copolymer Pluronic P123 as bi-templates. TEM, N adsorption-desorption, solid NMR, and FTIR were employed to characterize the obtained materials. Compressed CO severed as acidic reagent to promote the hydrolysis of organosilicas, and could tune the morphology and structure of the obtained PMOs nanomaterials simple by adjusting the CO pressure during the synthesis process. Rhodamine B (RB) and Ibuprofen (IBU), as the model dye and drug, were loaded into the prepared nanomaterials to reveal its adsorption and desorption ability. Furthermore, different molars of the surfactant (CTAB/SDS) and organosilane precursor (BTEB) were investigated to show the effect of the surfactant concentration on the morphology and structure of the PMOs prepared with compressed CO, and some different structures were obtained. A possible mechanism for the synthesis of PMOs with tubular structure using compressed CO was proposed based on the experimental results.
使用阳离子和阴离子混合表面活性剂（CTAB/SDS）和三嵌段共聚物 Pluronic P123 作为双模板，用压缩 CO2 制备具有管状结构的周期性介孔有机硅纳米球。采用 TEM、N2 吸附-解吸、固体 NMR 和 FTIR 对所得材料进行了表征。压缩 CO2 作为酸性试剂促进有机硅的水解，并可以通过在合成过程中调节 CO2 压力来简单地调节所得 PMOs 纳米材料的形态和结构。将罗丹明 B（RB）和布洛芬（IBU）作为模型染料和药物负载到制备的纳米材料中，以揭示其吸附和解吸能力。此外，还研究了不同摩尔比的表面活性剂（CTAB/SDS）和有机硅烷前体（BTEB），以表明表面活性剂浓度对用压缩 CO2 制备的 PMOs 的形态和结构的影响，并得到了一些不同的结构。根据实验结果，提出了一种使用压缩 CO2 合成具有管状结构的 PMOs 的可能机制。
