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首頁(yè)> 中文期刊> 《中國(guó)有色金屬學(xué)報(bào)（英文版）》 >一種新穎、簡(jiǎn)單的銀微米線的濕化學(xué)制備方法

一種新穎、簡(jiǎn)單的銀微米線的濕化學(xué)制備方法

     
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A novel and facile wet-chemical method for synthesis of silver microwires was developed.The well-defined particles were prepared by adding an iron (Ⅱ) sulfate heptahydrate solution into a silver nitrate solution containing citric acid drop by drop at 50 ℃.The resulting products were characterized by scanning electron microscopy and X-ray diffraction.It was found that the particles consisted of numerous silver microwires.The reaction temperature greatly affected the morphologies of the as-prepared particles.Both of the mean length and width of the silver microwires increased with the decrease of the concentration of silver nitrate.And the lower concentration was unfavorable for the formation of more silver microwires.Similar findings were also observed when the concentration of iron (Ⅱ) sulfate was decreased.The amount of citric acid also greatly affected the shape of the as-prepared particles.It was concluded that citric acid was the key role in the formation of silver microwires via the Oswald ripening mechanism.%提供一種新穎簡(jiǎn)單的銀微米線的濕化學(xué)制備方法.在反應(yīng)溫度為50℃的條件下,把硫酸亞鐵溶液逐漸滴加到含有檸檬酸的硝酸銀溶液中,合成銀微晶體.采用掃描電鏡(SEM)和X射線衍射儀(XRD)對(duì)所制備的銀微晶體進(jìn)行表征.結(jié)果表明:所制備的銀微晶體主要由大量的銀微米線組成；銀微晶體的形態(tài)與反應(yīng)溫度有很強(qiáng)的聯(lián)系:當(dāng)硝酸銀濃度降低時(shí),銀微米線的長(zhǎng)度和直徑都逐漸增大,且較低的硝酸銀濃度不利于生成更多的銀微米線.降低硫酸亞鐵濃度時(shí)也出現(xiàn)類似的結(jié)果.檸檬酸的用量對(duì)銀微晶體的微觀形態(tài)有很大的影響.根據(jù)銀微米線的形成機(jī)理,推斷檸檬酸在Oswald熟化形成銀微米線的過(guò)程中起著非常重要的作用.

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