Multiple organic compounds pose a threat to human health. Here we report on the synthesis of a novel nanostructured absorbent, mesoporous colloidal silica particles (pore size of ∼3 nm, surface are >1100 m²/g, discoid-shaped microns in size) that can be an effective sorbent for organic compounds due to their large surface area. The particle surface is hydrophobized through a trimethylchlorosilane treatment, which was controlled on the level of bulk (TGA analysis) and single particles (confocal Raman spectroscopy). We present the results of the study of the sorption of ten organic compounds of various molecular size and polarity. It is found that our particles can absorb some organic compounds from water up to more than 100% by weight. No substantial dependence of the sorption efficiency on the molecular size was found. Despite a complex nanoscale environment, it was found that the sorption efficiency inversely correlates with the polarity of the organic components, which is similar to the classical sorbents. Further, we demonstrate a strong correlation between the presence of hydrophobic groups and the absorbed compound with a submicron resolution by means of confocal Raman microscopy. This knowledge can be used to design new efficient absorbents.

多种有机化合物对人体健康构成威胁。在这里，我们报告了一种新型的纳米结构吸收剂，中孔胶体二氧化硅颗粒（孔径约3 nm，表面大于1100 m ^2）的合成/ g，大小为盘状微米），由于其大的表面积而成为有机化合物的有效吸附剂。颗粒表面通过三甲基氯硅烷处理进行了疏水化处理，该处理通过控制体积（TGA分析）和单个颗粒（共聚焦拉曼光谱）来进行。我们介绍了十种不同分子大小和极性的有机化合物的吸附研究结果。发现我们的颗粒可以从水中吸收某些有机化合物，其含量高达100％（重量）以上。没有发现吸附效率对分子大小的实质依赖性。尽管有复杂的纳米级环境，但发现吸附效率与有机组分的极性成反比，这与经典的吸附剂相似。进一步，我们通过共聚焦拉曼显微镜证明了疏水基团的存在与被吸附的化合物之间的亚微米分辨率之间存在很强的相关性。这些知识可用于设计新型高效吸收剂。