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lxbflyhigh新虫 (小有名气)
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【请教】合成纳米粒子中的问题
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在JPC,B101 9876文献中合成纳米粒子步骤如下： Hydrosols containing nanoparticles of Ag and Pt were prepared by the use of NaBH4 as the reducing agent. A 0.01 M solution of NaBH4 aged for 3 h was added dropwise up to 0.5 mL to a beaker containing 100 mL of the stock solution of 0.29 mM AgNO3 or 2.6 mM H2PtCl6 under vigorous stirring. The Ag solution turned light yellow and that of Pt became yellowish grey due to formation of metal sols. To these hydrosols was added 20 mL of the 1.668 mM dodecanethiol solution resulting in a biphasic mixture. Around 1.0 mL of concentrated HCl was added dropwise under stirring to the mixture resulting in the transfer of the nanoparticles to the toluene layer, as evidenced by the color change 可是我发现还原剂与前驱体的配体不对，还原剂量远远不足。 是否“NaBH4 aged for 3 h”这一步骤是个关键。 |
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lxbflyhigh
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2楼2009-04-12 09:49:02
