摘要
采用廉价的环境友好的工业化生产的阳离子烷基糖苷作为模板剂,在pH 9的弱碱性条件下水解正硅酸乙酯得到了蠕虫状有序的介孔二氧化硅材料。实验结果表明,最佳反应条件为:反应温度21℃,各反应物的质量比CAPG∶水∶氨水∶TEOS=0.9∶20.0∶1.1∶2.0。所得到的二氧化硅材料具有规则的蠕虫状结构,有较好的水热及热稳定性,经550℃焙烧4 h和100℃水热处理54 h后,蠕虫状孔道结构仍保持良好,表明其可作为一种良好的催化剂载体。此方法所选用的导向剂具有绿色、天然、低毒、低刺激等优点,符合绿色化学的发展趋势,并有利于将其向工业化生产推进。
A new low-cost synthetic procedure is developed to obtain worm-like ordered mesoporous silica using environmental friendly and industrial grade cation alkyl polyglycoside as structure-directing agents in pH 9 alkalescent condition by hydrolysis of TEOS. The results show that the optimum reaction condition is as follows： the reaction temperature is 21 ℃ , the reaction weight ratio is approximately that CAPG： water： ammonia： TEOS = 0.9： 20.0： 1. 1 ： 2.0, the obtained worm-like silica materials is regular with good thermal stability. It can be used as a good catalyst carrier because the worm-like pore structure is still good after calcined at 550 ℃ for 4 hours and 100 ℃ hydrothermal treatment for 54 hours. The structure-directing agents the method selected is green, natural, low toxicity and low stimulation. This method is simple, last, low-cost, environmentally, in line with the development trend of green chemistry and is propitious to industrialization.
出处
《实验室研究与探索》
CAS
北大核心
2014年第4期26-28,32,共4页
Research and Exploration In Laboratory
基金
上海市科委重点基础项目(11JC1403400)
关键词
介孔材料
二氧化硅
蠕虫状
水热法
mesoporous material
silica
worm-like
hydrothermal method
