Polymer-derived ceramic aerogels as sorbent materials for the removal of organic dyes from aqueous solutions
Polymer-derived ceramic aerogels as sorbent materials for the removal of organic dyes from aqueous solutions
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DOI：
10.1111/jace.15241
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发表时间：
2018-02-01
影响因子：
3.9
通讯作者：
Soraru, Gian Domenico
中科院分区：
文献类型：
--
作者：
Bruzzoniti, Maria C.;Appendini, Marta;Soraru, Gian Domenico
聚合物衍生的SiC和SiOC气凝胶已被合成和表征，从微观结构的角度来看，并作为吸附剂材料从水溶液中去除有机染料（亚甲基蓝，MB，和罗丹明B，RB）。它们的吸附行为已与聚合物衍生的SiC泡沫和商业介孔二氧化硅进行了比较。气凝胶可以有效地从水溶液中去除MB和RB，并且由于更高的表面积，与SiC泡沫相比，它们的容量更高。SiOC气凝胶在水处理后保持整体（允许容易地去除而不需要过滤步骤），并且其去除MB的最大容量为42.2 mg/g，这高于文献中报道的所研究的中孔二氧化硅和许多基于C的多孔吸附剂。这种高吸附容量的原因与聚合物衍生的SiOC的独特结构有关，其由无定形碳氧化硅网络和游离碳相组成。
Polymer-derived SiC and SiOC aerogels have been synthesized and characterized both from the microstructural point of view and as sorbent materials for removing organic dyes (Methylene Blue, MB, and Rhodamine B, RB) from water solutions. Their adsorbent behavior has been compared with a polymer-derived SiC foam and a commercial mesoporous silica. The aerogels can efficiently remove MB and RB from water solution and their capacity is higher compared to the SiC foams due to the higher surface area. The SiOC aerogel remains monolithic after the water treatment (allowing for an easy removal without the need of a filtration step) and its maximum capacity for removing MB is 42.2 mg/g, which is higher compared to the studied mesoporous silica and many C-based porous adsorbents reported in the literature. The reason for this high adsorption capacity has been related to the unique structure of the polymer-derived SiOC, which consists of an amorphous silicon oxycarbide network and a free carbon phase.