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231224s2015 xx |||||o 00| ||eng c |
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|a 10.1021/la503598b
|2 doi
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|a pubmed24n0815.xml
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|a eng
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|a Masnadi, Mitra
|e verfasserin
|4 aut
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|a Cu(II) galvanic reduction and deposition onto iron nano- and microparticles
|b resulting morphologies and growth mechanisms
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|c 2015
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|a Text
|b txt
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|a ƒaComputermedien
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|a ƒa Online-Ressource
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|a Date Completed 21.05.2015
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|a Date Revised 20.01.2015
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a The galvanic reduction of heavy metal ions by zerovalent iron nanoparticles is a key process occurring extensively in wastewater remediation, as well as for the synthesis of materials, including catalysts. In this work, we studied the growth of copper species on nano- and micrometer-sized iron particles and investigated the morphologies of the resulting structures. The growth proceeds via sacrificial oxidation of iron particles and reduction of Cu(2+) cations from aqueous solutions. Based on the results of transmission and scanning electron microscopy (TEM and SEM), coupled with energy-dispersive X-ray spectroscopy (EDX), electron energy loss spectroscopy (EELS), and X-ray photoelectron spectroscopy (XPS), we proposed two growth mechanisms for the morphologies seen for the copper exposed nano- and microiron particles at varying copper/iron ratios. We observed that, in low Cu/Fe ratios (≤1/100), copper particles decorated the oxide shell of the iron nano/microparticles, while in higher Cu/Fe ratios (≥1/10), Cu-rich hollow structures were formed. Iron microparticles also led to the formation of interesting Cu-fern structures. This study provides insight into the fate of particles used in remediation, as well as recommendations for the synthesis of well-defined materials tailored for precise applications
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|a Journal Article
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|a Yao, Nan
|e verfasserin
|4 aut
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|a Braidy, Nadi
|e verfasserin
|4 aut
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|a Moores, Audrey
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1992
|g 31(2015), 2 vom: 20. Jan., Seite 789-98
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|x 1520-5827
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|g volume:31
|g year:2015
|g number:2
|g day:20
|g month:01
|g pages:789-98
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|u http://dx.doi.org/10.1021/la503598b
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