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lo@丹丹@ve金蟲 (小有名氣)
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[求助]
求助200nm左右的二氧化硅球的做法 已有5人參與
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| 現想以二氧化硅作為模板進行材料合成,相合成200nm左右的二氧化硅顆粒,但是現在的問題是合成出的二氧化硅均在400-500nm之間,求各路大神指導。 |

木蟲 (著名寫手)
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???????4?????????????????????????????????TEOS,????????????????????????????????????λ???????????????????????10h???????????????????羵?????????????????á????????????????4??ɡ?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. |
金蟲 (正式寫手)


專家顧問 (著名寫手)
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專家經驗: +108 |
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????????????Langmuir 2011, 27, 7185?C7191????????????????????????? ??鲿?????????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. |
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