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lo@丹丹@ve金虫 (小有名气)
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[求助]
求助200nm左右的二氧化硅球的做法已有5人参与
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| 现想以二氧化硅作为模板进行材料合成，相合成200nm左右的二氧化硅颗粒，但是现在的问题是合成出的二氧化硅均在400-500nm之间，求各路大神指导。 |
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20楼2015-05-15 15:15:45
zhangjun1988
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2楼2015-03-28 09:03:49
3楼2015-03-28 09:41:40
nanofollower
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【答案】应助回帖
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手头刚好有一篇：Langmuir 2011, 27, 7185–7191。记得引用人家论文就行了，呵呵 实验部分的描述：The preparation of different sized silica spheres involves the ammonia-catalyzed hydrolysis and condensation of TEOS in an aqueous ethanol solution via the classical st�ober method.21,22 Taking the synthesis of ∼190 nm silica spheres as an example, 15 mL of absolute ethanol, 5 mL of DI water, and 0.7 mL of 28% NH3 3H2O were mixed and stirred. A total of 0.6 mL of TEOS was added into the mixture quickly. After a reaction time of about 10 h, the silica spheres were isolated by centrifugation. Then the white precipitate was washed with ethanol three times. |
4楼2015-03-28 09:56:35