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Shape control technology during electrochemical synthesis of gold nanoparticles 被引量：2

Shape control technology during electrochemical synthesis of gold nanoparticles
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摘要 Gold nanoparticles with different shapes and sizes were prepared by adding gold precursor （HAuC14） to an electrolyzed aqueous solution of poly（N-vinylpyrrolidone） （PVP） and KN03, which indicates the good reducing capacity of the PVP-containing solution after being treated by electrolysis. Using a catholyte and an anolyte as the reducing agents for HAuC14,＇ respectively, most gold nanoparticles were spherical particles in the former case but plate-like particles in the latter case. The change in the pH value of electrolytes caused by the electrolysis of water would be the origin of the differences in shape and morphology of gold nanoparticles. A hypothesis of the H＋ or OH- catalyzed PVP degradation mechanism was proposed to interpret why the pH value played a key role in determining the shape or morphology of gold nanoparticles. These experiments open up a new method for effectively controlling the shape and morphology of metal nanoparticles by using electrochemical methods. Gold nanoparticles with different shapes and sizes were prepared by adding gold precursor （HAuC14） to an electrolyzed aqueous solution of poly（N-vinylpyrrolidone） （PVP） and KN03, which indicates the good reducing capacity of the PVP-containing solution after being treated by electrolysis. Using a catholyte and an anolyte as the reducing agents for HAuC14,＇ respectively, most gold nanoparticles were spherical particles in the former case but plate-like particles in the latter case. The change in the pH value of electrolytes caused by the electrolysis of water would be the origin of the differences in shape and morphology of gold nanoparticles. A hypothesis of the H＋ or OH- catalyzed PVP degradation mechanism was proposed to interpret why the pH value played a key role in determining the shape or morphology of gold nanoparticles. These experiments open up a new method for effectively controlling the shape and morphology of metal nanoparticles by using electrochemical methods.
作者 Xiu-yu Liu Cong-ying Cui Ying-wen Cheng Hou-yi Ma Duo Liu
机构地区 State Key Lab of Crystal Materials New Material Institute of Shandong Academy of Sciences School of Chemistry and Chemical Engineering
出处 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2013年第5期486-492,共7页 矿物冶金与材料学报（英文版）
基金 supported by the National Natural Science Foundation of China(No.21073111) the Natural Science Foundation of Shandong Province,China(No.ZR2010BQ029)
关键词 metal nanopaxticles SYNTHESIS GOLD shape control electrochemical methods metal nanopaxticles synthesis gold shape control electrochemical methods
分类号 TB383.1 [一般工业技术—材料科学与工程]
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参考文献25

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International Journal of Minerals,Metallurgy and Materials
2013年 第5期

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