Convenient, rapid synthesis of silver nanocubes and nanowires via a microwave-assisted polyol method
Convenient, rapid synthesis of silver nanocubes and nanowires via a microwave-assisted polyol method
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DOI：
10.1088/0957-4484/21/2/025607
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发表时间：
2010-01-15
期刊：
影响因子：
3.5
通讯作者：
Jiang, Renzhi
中科院分区：
文献类型：
--
作者：
Chen, Dapeng;Qiao, Xueliang;Jiang, Renzhi
采用微波辅助的多元醇法，通过向溶液中加入硫化钠（Na 2S）合成了银纳米结构。通过调节Na 2S的浓度和加热功率，可以观察到一个有趣的形貌演变。据发现，理想的浓度Na 2S是31.25-500 μ M的快速还原Ag+在300 W下的最佳条件下生产单分散的银纳米立方体。当加热功率增加到400 W时，62.5-250 μ M是合成银纳米立方体的理想Na 2 S浓度。在增加Na 2S的浓度（>500 μ M）时，在300和400 W下合成银纳米线、纳米立方体、双棱锥和不规则/准球形颗粒的混合物。特别地，在400 W下将Na 2S的浓度增加至750 μ M导致产生一定量的银纳米线。此外，通过改变Na 2S的浓度和加热功率，可以得到尺寸可控的银纳米立方体。与传统的湿化学方法相比，该方法的优点是反应时间明显减少到3.5 min。最后，我们的工作提供了一个简单的策略，用于制造具有可控的形貌和尺寸的银纳米结构。
Silver nanostructures have been synthesized via a microwave-assisted polyol method by adding sodium sulfide (Na2S) into the solution. An interesting morphology evolution can be observed by adjusting the concentration of Na2S and the heating power. It is found that the ideal concentration of Na2S is 31.25-500 mu M for the fast reduction of Ag+ at 300 W under optimal conditions for producing monodispersed silver nanocubes. When the heating power is increased to 400 W, 62.5-250 mu M is the ideal concentration of Na2S for the synthesis of silver nanocubes. On increasing the concentration of Na2S (>500 mu M), a mixture of silver nanowires, nanocubes, bipyramids, and irregular/quasispherical particles is synthesized at 300 and 400 W. In particular, an increase in the concentration of Na2S to 750 mu M at 400 W leads to the production of a quantity of silver nanowires. In addition, silver nanocubes with controllable sizes can be obtained by changing the concentration of Na2S and the heating power. Compared to traditional wet-chemical methods, this method has the advantage of a marked decrease in reaction time to 3.5 min. Finally, our work provides a simple strategy for fabricating silver nanostructures with controllable morphologies and sizes.