TEOS使用前为何要在20℃冷冻一段时间?在ChemSusChem 2013, 6, 1915 – 1922中合成制备 二氧化硅 球过程中提到一句In a typical experiment, ethanol (75 mL), deionized water (10 mL),and ammonium hydroxide (3.15 mL, 28 %) were charged into a 250 mL round-bottomed flask. The flask was sealed with a septum and put into an oil bath maintained at 45℃. The solution was mixed with magnetic stirring for 30 min. Then TEOS (6.0 mL) was put into a glass vial, which was kept at 20℃ in a water bath for 30 min. TEOS was quickly injected into the solution in the flask by using a syringe and under vigorous stirring很奇怪这里为什么要特意提到这个20℃,对反应有什么影响吗?查看更多1个回答 . 2人已关注