Capturing nitrosamines in aqueous solution by composited super-hydrophobic silicic xerogel

Capturing nitrosamines in aqueous solution by composited super-hydrophobic silicic xerogel
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复合超疏水硅质干凝胶捕获水溶液中的亚硝胺

DOI:
10.1016/j.micromeso.2016.03.001
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发表时间:
2016-06
影响因子:
5.2
通讯作者:
Zhu, Jian Hua
Zhu, Jian Hua
中科院分区:
材料科学2区
文献类型:
--
作者:
Wang, Wei-miao;Yang, Zheng Yu;Wang, Ying;Zhu, Jian Hua

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以甲基三甲氧基硅烷(MTMS)和二甲基二甲氧基硅烷(DMDMS)为原料制备了超疏水干凝胶(SG),确定了MTMS和DMDMS的最佳摩尔比为3/2。为制备新型的烟草提取液中亚硝胺的高效吸附剂,采用介孔二氧化硅对SG进行表面修饰,制备了具有较大比表面积(152-208 m2 g-1)和孔容(0.133-0.162 mLg-1)的包覆型复合材料MSGx,其对烟草提取液中亚硝胺的吸附率为54-59%,上级优于沸石和介孔二氧化硅。
Super-hydrophobic silicic xerogel (SG) was prepared from methyltrimethoxysilane (MTMS) and dimethyldimethoxysilane (DMDMS), and the optimized MTMS to DMDMS molar ratio was determined to be 3/2. To fabricate new effective nitrosamines sorbent in tobacco extract solution, SG was modified by epitaxial growth of mesoporous silica to form the coated composite named as MSGx with a large surface area (152–208 m2g-1) and pore volume (0.133–0.162 mLg−1), and the new sorbent could capture 54–59% of nitrosamines in tobacco solution, superior to zeolite and mesoporous silica.
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