| 光谱学与光谱分析 |
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| UV-Vis Studies on the Course of Reaction of Au/Ag Alloy Colloid with Hydrogen Tetrachloroaurate(Ⅲ) Hydrate |
| JIN Yi-liang, YAO Jian-lin, GU Ren-ao* |
| School of Chemistry and Chemical Engineering, Suzhou University, Suzhou 215123, China |
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Abstract Using citrate as protector, Au-Ag alloy nanoparticles with different molar ratios were prepared with hydrazine as the reducer. One plasmon band between monometallic Ag and Au was observed in their UV-Vis spectra. And the peak of alloy shifted linearly with the ratio of Au changing in the alloy. By UV-Vis spectra, the course of reaction of the alloy colloid with HAuCl4 was studied. The result shows that the UV-Vis spectra of the alloy colloid changed regularly with the adding volume of HAuCl4 increasing. And there is a linear interval in it with the change in the calculated ratio of Au. With the former studies, the course can be attributed to the dealloy of Au/Ag alloy.
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Received: 2008-08-26
Accepted: 2008-11-28
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Corresponding Authors:
GU Ren-ao
E-mail: ragu@suda.edu.cn
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