Oxidation of copper nanoparticles in water: mechanistic insights revealed by oxygen uptake and spectroscopic methods
Oxidation of copper nanoparticles in water: mechanistic insights revealed by oxygen uptake and spectroscopic methods
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DOI：
10.1039/c3dt32836h
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发表时间：
2013-01-01
影响因子：
4
通讯作者：
Scaiano, J. C.
中科院分区：
文献类型：
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作者：
Pacioni, Natalia L.;Filippenko, Vasilisa;Scaiano, J. C.
类似于8 nm未保护的铜纳米颗粒的水溶液的氧化在空气中在30 ° C下在约2小时内发生，以通过中间Cu+物质得到作为最终产物的Cu 2+。在5摄氏度下，这个过程慢了大约5倍;同样，起牺牲作用的维生素C也减慢了氧化，而CuNP催化氧化。在这项工作中，我们提出了一个详细的分析胶体CuNP的氧化机制推断，通过光谱方法（紫外可见光和EPR）结合吸氧量测量，重点是影响氧化过程的因素。
Oxidation of aqueous similar to 8 nm unprotected copper nanoparticles takes place under air in approximately 2 hours at 30 degrees C to give Cu2+ as a final product through an intermediate Cu+ species. At 5 degrees C the process is about 5 times slower; similarly, vitamin C, which plays a sacrificial role, also slows down the oxidation, while CuNP catalyses the oxidation. In this work, we present a detailed analysis of the oxidation mechanism of colloidal CuNP inferred through spectroscopic methods (UV-visible and EPR) combined with oxygen uptake measurements, with emphasis on factors affecting the oxidative process.