Chemical structure of extracted copper from scrap Cu/ITO thin films in a room temperature ionic liquid containing iodine/iodide

Huang, Hsin-Liang; Huang, Hsin‐Hung; Wei, Yu Jhe

doi:10.1016/j.cplett.2016.04.049

Cited by 1 publication

(3 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We also found that the concentrations of CuI decreased in the IL-I at 303–413 K because CuI interacted with the iodide in IL-I (see Figure 3 a–c). The copper species on scrap Cu/ITO thin film extracted into the IL-I may undergo the following reactions: I 2 + I − → I 3 − , 2Cu + I 3 − → 2CuI + I − , and 2I − + 2CuI → 2CuI 2 − [ 22 ]. Moreover, CuO was formed by oxidation of Cu with dissolved oxygen in the IL-I, as shown in Figure 3 b–e.…”

Section: Resultsmentioning

confidence: 99%

“…Moreover, protic ionic liquids without chelating agents have also achieved highly selective extraction of copper from water [ 21 ]. Although metal ions can be extracted into ionic liquids, metals must dissolve in solutions [ 22 ]. We used 1-butyl-3-methyl imidazolium hexafluorophosphate ([C 4 mim][PF 6 ]) containing iodine/iodide to extract copper from Cu/ITO.…”

Section: Introductionmentioning

confidence: 99%

“…We used 1-butyl-3-methyl imidazolium hexafluorophosphate ([C 4 mim][PF 6 ]) containing iodine/iodide to extract copper from Cu/ITO. The resistivity and crystal phase of the regenerated ITO thin film was similar to that of unused ITO thin film [ 22 ]. In this study, [C 4 mim][PF 6 ], containing iodine/iodide (IL-I), was used to extract Cu from Cu/ITO.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

In Situ XANES Studies on Extracted Copper from Scrap Cu/ITO Thin Film in an Ionic Liquid Containing Iodine/Iodide

Huang¹,

Wei²

2022

Molecules

Self Cite

View full text Add to dashboard Cite

Copper is coated on indium-tin-oxide (ITO) thin film to improve its electrical resistivity. In order to recycle the scrap Cu/ITO thin film, an ionic liquid (1-butyl-3-methyl imidazolium hexafluorophosphate ([C4mim][PF6])) containing iodine/iodide (IL-I) was used to extract copper at 303, 343, 413, 374, and 543 K. The extraction efficiency of copper from the scrap Cu/ITO thin film was >99% with IL-I. Using XRD, crystal In2O3 was found on the regenerated ITO thin film which had a resistivity similar to that of unused ITO thin film. Using X-ray absorption near edge structural (XANES) spectroscopy, at least two paths for the extraction of copper from the Cu/ITO thin film into IL-I were identified. Path I: Copper is stripped from the scrap Cu/ITO thin film and then interacts with I3− in the IL-I to form nano CuI. The nano CuI further interacts with I−. Path II: Copper interacts with I3− on the surface of the Cu/ITO thin film to form nano CuI. The nano CuI is further stripped into the IL-I to interact with I−. During extraction, the nanoparticle size could be increased in the IL-I by conglomeration due to fewer coordinating anions and decrease in the viscosity of IL-I at high temperatures. Furthermore, nanoparticle growth was affected by [PF6]− of the IL-I determined via 31P NMR.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation