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【求助】如何合成胺基在外修饰的的Ag纳米？
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求助虫子，有没有合适的方法合成Ag纳米，R—NH2有机物修饰，胺基在外面的。查了半天没有查到，谢谢！！ [ Last edited by 大笨猪和聪明羊 on 2008-10-6 at 15:52 ] |
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wdwsnnu(金币+1,VIP+0)::-)，谢谢讨论
wdwsnnu(金币+1,VIP+0)::-)，谢谢讨论
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4nm银粒子的制备球形吸收波长为400nm：a 20 mL solution with a final concentration of 0.25 mM AgNO3 and 0.25 mM trisodium citrate in water was prepared. While stirring vigorously, 0.6 mL of 10 mM NaBH4 was added all at once. Stirring was stopped after 30 s. This seed was used 2 h after preparation but could not be used after 5 h, as a thin film of particles appeared at the water surface. According to transmission electron microscopy, seed diameters were 4 ± 2 nm. For capping action of citrate see: A. Henglein and M. Giersig, J. Phys. Chem. B, 1999, 103, 9533. |
3楼2008-01-08 04:51:55
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fzfscn(金币+2,VIP+0):谢谢您的回答！欢迎常来纳米版。
fzfscn(金币+2,VIP+0):谢谢您的回答！欢迎常来纳米版。
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不知道楼主是要合成多大的 1、10nm银粒子的制备吸收波长大概为400nm 颜色为棕色：法一：Ag2S04 (80 mg) was dissolved in ca. 200 mL of hot water and then mixed with 5 g of PVA dissolved in ca. 200mL of hot water. The mixture was then bubbled with H2 at near boiling temperature for 3 h. The final volume was adjusted to 500 mL. J. Phys. Chem. 1982, 86, 3391-3395 P. C. Lee and D. Meisel‘ 法二：A solution of 5 X 10-3M AgNO3, (100 mL) was added portionwise to 300 mL of vigorously stirred ice-cold 2 X10-3M NaBH4. A solution of 1% PVA (50 mL) was added during the reduction. The mixture was then boiled for ca. 1 h to decompose any excess of NaBH4. The final volume was adjusted to 500 mL. J. Phys. Chem. 1982, 86, 3391-3395 P. C. Lee and D. Meisel’ |
2楼2008-01-08 04:51:32
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