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

• Published in: Microporous and mesoporous materials Vol. 227; pp. 161 - 168
• Main Authors: Li, Shuo Hao, Lin, Wei Gang, Huang, Bi Cheng, Wang, Lei-jun, Gu, Wen-bo, Wang, Wei-miao, Yang, Zheng Yu, Wang, Ying, Zhu, Jian Hua
• Format: Journal Article
• Language: English
• Published: Elsevier Inc 01.06.2016
• Subjects: Environment protection; Epitaxial growth of mesoporous silica; Liquid adsorption; Nitrosamines; Super-hydrophobic silicic xerogel; Nitrosamines; Liquid adsorption; Epitaxial growth of mesoporous silica; Environment protection; Super-hydrophobic silicic xerogel
• ISSN: 1387-1811; 1873-3093
• DOI: 10.1016/j.micromeso.2016.03.001

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 m2 g-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. [Display omitted] •New powerful TSNA trapper in tobacco solution.•It can efficiently trap 60% of nitrosamines in tobacco solution.•Fabrication core–shell composite through epitaxial growth.•Tuning surface state of sorbent to accelerate liquid adsorption.•Control the carcinogen pollution at source.