Corrosion of Au particles in air-exposed NaI-treated Au colloidal suspensions
Corrosion of Au particles in air-exposed NaI-treated Au colloidal suspensions
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DOI：
10.1007/s00396-003-1046-3
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发表时间：
2004-08-01
影响因子：
2.4
通讯作者：
Gerthsen, D
中科院分区：
文献类型：
--
作者：
Wanner, M;Gerthsen, D
这项研究考察了在空气中使用NaI处理柠檬酸盐包覆的Au胶体颗粒的影响。而在NaI处理的Au胶体悬浮液中，碘诱导的三碘化合物的形成自发进行，而在相同条件下，它在Au胶体悬浮液中的积累被强烈地减慢。根据电子吸收光谱和透射电子显微镜的实验结果，提出了在三碘化合物的中间参与下Au粒子被氧氧化的机理。
This study examines the influence of the treatment of citrate-capped Au colloidal particles with NaI under exposure to air. Whereas in the NaI-treated centrifugate of the Au colloidal suspension the iodide-induced formation of triiodide runs spontaneously, its accumulation is found to be strongly decelerated in the Au colloidal suspension under the same conditions. In accordance with the experimental findings from electron absorption spectroscopy and transmission electron microscopy, a mechanism is proposed which describes the oxidation of the Au particles by oxygen under intermediate participation of triiodide.