通过可控的溶胶凝胶过程,使用廉价的水玻璃为硅源、氨水为助剂制备了孔容和孔径可控的介孔二氧化硅.研究了溶胶凝胶过程中的影响因素.结果表明,控制氨水/二氧化硅的比例、水玻璃的浓度、凝胶温度和终点的pH值可以制备出介孔二氧化硅.制备的介孔二氧化硅的主要特点包括孔容高和孔径可调.
Mesoporous silica with tuned pore volume and pore size was yielded with the controllable sol-gel process using inexpensive water glass as silica source and ammonia as an additive.The effects of the parameters of the sol-gel process have been examined.The results show that the mesoporous silica can be synthesized by controlling the weight ratio of ammonia to silica,concentration of water glass,gelating temperature and the final pH value.The major properties of the obtained mesoporous silica are large pore volumes and controllable pore sizes.
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