科研之友
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摘要
A method to control the structure of the silica wall of mesoporous silica materials was proposed for trapping trace amounts of small pollutant molecules. The mesoporous silica materials containing pore wall defect voids were synthesized by controlling the pH of the synthesis system and the concentration of the organic surfactant and adding an inorganic salt to control the assembling rate of silica species on the surfactant micelle or change the form of the surfactant-aluminosilicate liquid crystal. X-ray diffraction, N(2) adsorption-desorption, (29)Si MAS nuclear magnetic resonance, and transmission electron microscopy were used to characterize the pore structure of the samples. Volatile nitrosamine N-nitrosopyrrolidine (NPYR) was selected as the probe to assess the adsorptive capacity of the composites. The introduction of aluminum species and the creation of structural defects in the mesoporous silica wall greatly improved the adsorption of NPYR. The material is useful for environmental protection.
- 出版日期2010-3
- 单位南京大学
