Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报(英文版)

Transactions of Nonferrous Metals Society of China

Vol. 22    No. 4    April 2012

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A novel and facile wet-chemical method for synthesis of silver microwires
ZHAI Ai-xia1, CAI Xiong-hui2, JIANG Xiao-ye2, FAN Guo-zhi1

1. School of Chemical and Environmental Engineering, Wuhan Polytechnic University, Wuhan 430023, China;
2. School of Biologic and Pharmaceutical Engineering, Wuhan Polytechnic University, Wuhan 430023, China

Abstract: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 °C. 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.

 

Key words: silver microwires; iron (II) sulfate heptahydrate; citric acid; wet-chemical method

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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