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vwangvhaov木蟲 (小有名氣)
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[求助]
二氧化硅包覆納米粒子求助
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做介孔二氧化硅包覆納米粒子反應(yīng),參考一篇文獻(xiàn),可是怎么也重復(fù)不出來得到很好的結(jié)構(gòu),求有經(jīng)驗(yàn)的朋友幫忙看下,小弟不勝感激。 In a typical procedure, 0.5 mL of the Fe3O4 nanocrystals in chloroform was poured into 5 mL of 0.55M aqueous cethyltrimethylammonium bromide (CTAB) solution and the resulting solution was stirred vigorously for 30 min. The formation of an oil-in-water microemulsion resulted in a turbid brown solution. Then, the mixture was heated up to 60 degree and aged at that temperature for 10 min under stirring to evaporate the chloroform , resulting in a transparent black Fe3O4/CTAB solution. The resulting solution was added to a mixture of 45 mL of water and 0.3 mL of 2M NaOH solution and the mixture was heated up to 70oC under stirring. Then, 0.5 mL of tetraethylorthosilicate (TEOS), 50 μL of RITC-APTES solution, and 3 mL of ethylacetate was added to the reaction solution in sequence. 以上是文獻(xiàn)上的方法,請(qǐng)做過的朋友給予幫助!萬分感激~~~ |
核殼催化劑2013-09-23 |

新蟲 (初入文壇)
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