用于从水性介质中高效去除1,1,1-三氯-2,2-双（4-氯苯基）乙烷（滴滴涕）的多功能Fe₃O₄@nSiO₂@mSiO₂-Fe核壳微球。
Multifunctional Fe₃O₄@nSiO₂@mSiO₂-Fe core-shell microspheres for highly efficient removal of 1,1,1-trichloro-2,2-bis(4-chlorophenyl)ethane (DDT) from aqueous media.
作者信息
Tian Hua, Liu Feng, He Junhui
机构信息
Functional Nanomaterials Laboratory and Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences (CAS), Beijing 100190, China.
Functional Nanomaterials Laboratory and Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences (CAS), Beijing 100190, China; School of Chemical & Environmental Engineering, China University of Mining & Technology, Beijing 100083, China.
出版信息
J Colloid Interface Sci. 2014 Oct 1;431:90-6. doi: 10.1016/j.jcis.2014.06.009. Epub 2014 Jun 17.
A novel multifunctional microsphere with an iron oxide-improved mesoporous silica shell and a Fe3O4@SiO2 core has been successfully prepared by a hydrothermal method and impregnation process. The resulting Fe3O4@nSiO2@mSiO2-Fe core-shell microspheres are utilized as a catalyst for the removal of 1,1,1-trichloro-2,2-bis(4-chlorophenyl) ethane (DDT) and its derivatives, i.e., 1,1-dichloro-2,2-bis(4-chlorophenyl) ethane (DDD) and 1,1-dichloro-2,2-bis(4-chlorophenyl) ethylene (DDE). The results indicated that the iron oxide nanoparticles were well dispersed on the mesoporous silica shell of Fe3O4@nSiO2@mSiO2. DDT, DDD and DDE could be quickly and effectively removed from aqueous media in 60 min, and completely dechlorinated at 350°C by Fe3O4@nSiO2@mSiO2-Fe. More importantly, the Fe3O4@nSiO2@mSiO2-Fe microspheres were superparamagnetic and could be separated and collected easily and rapidly using a magnet.
通过水热法和浸渍工艺成功制备了一种具有氧化铁改性介孔二氧化硅壳层和Fe3O4@SiO2核的新型多功能微球。所得的Fe3O4@nSiO2@mSiO2-Fe核壳微球被用作催化剂，用于去除1,1,1-三氯-2,2-双（4-氯苯基）乙烷（滴滴涕）及其衍生物，即1,1-二氯-2,2-双（4-氯苯基）乙烷（滴滴滴）和1,1-二氯-2,2-双（4-氯苯基）乙烯（滴滴伊）。结果表明，氧化铁纳米颗粒在Fe3O4@nSiO2@mSiO2的介孔二氧化硅壳层上分散良好。滴滴涕、滴滴滴和滴滴伊可在60分钟内从水介质中快速有效地去除，并在350°C下被Fe3O4@nSiO2@mSiO2-Fe完全脱氯。更重要的是，Fe3O4@nSiO2@mSiO2-Fe微球具有超顺磁性，可用磁铁轻松快速地分离和收集。
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