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kenbvtve新蟲 (小有名氣)
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[交流]
介孔硅合成求助 已有3人參與
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http://m.gaoyang168.com/html/201310/6527564.html 遇到了和這個帖子一樣的問題。 按照文獻操作步驟:Hexadecyl trimethyl ammonium chloride (CTAC, 2g) and triethanolamine (TEA) were dissolved in turn in 20 mL water at 95°C under intensive stirring. After 1 h, 1.5 mL of tetraethyl orthosilicate (TEOS) was added dropwise and the resulting mixture was stirred for another 1 h. The products were collected by centrifugation and washed for several times with ethanol to remove the residual reactants. By adjusting the using amount of TEA under the same conditions, the particle size of MSNs was tuned as 25 nm (TEA, 0.08 g), 50 nm (TAE, 0.06 g), 67 nm (TEA, 0.04 g) and 105nm (TEA, 0.02 g). 合成的介孔硅是橢圓的。按照文獻的方法,應(yīng)該是25nm,TEM顯示卻是 50nm。團聚的也很厲害。 我是先將CTAC溶于20ml水中,然后升溫到95度,再加入0.08g TEA,回流1小時,轉(zhuǎn)速400 rpm。然后再加入1.5 mL的TEOS,繼續(xù)回流1 h。 |
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