A SERS Study of the Interaction of n-Octanohydroxamate with a Copper Electrode
Author(s)
Hope, Gregory A
Woods, Ronald
Parker, Gretel K
Griffith University Author(s)
Year published
2010
Metadata
Show full item recordAbstract
SERS spectroelectrochemical investigations have demonstrated that the flotation collector n-octanohydroxamate specifically adsorbs on copper surfaces in the region of thermodynamic stability of the metal and, at low ionic strength, this gives rise to a contact angle of ~ 70The contact angle fell to zero when Cu2O was formed on the copper surface and increased again to ~ 70͊when the potential was increased further. Voltammetry established that, in 0.01 M KOH, the presence of hydroxamate in concentrations of 10-3 M and above retards the rate of formation of Cu2O and indicates that a stability zone of copper ...
View more >SERS spectroelectrochemical investigations have demonstrated that the flotation collector n-octanohydroxamate specifically adsorbs on copper surfaces in the region of thermodynamic stability of the metal and, at low ionic strength, this gives rise to a contact angle of ~ 70The contact angle fell to zero when Cu2O was formed on the copper surface and increased again to ~ 70͊when the potential was increased further. Voltammetry established that, in 0.01 M KOH, the presence of hydroxamate in concentrations of 10-3 M and above retards the rate of formation of Cu2O and indicates that a stability zone of copper n-octanohydroxamate replaces that of hydrated CuO. It is concluded that the development of a copper n-octanohydroxamate layer is responsible for the copper oxide surface being rendered hydrophobic at high potentials. SERS investigations of the copper/hydroxamate system is considered not to be an appropriate model for advancing understanding of the interaction of this collector with oxidized mineral surfaces.
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View more >SERS spectroelectrochemical investigations have demonstrated that the flotation collector n-octanohydroxamate specifically adsorbs on copper surfaces in the region of thermodynamic stability of the metal and, at low ionic strength, this gives rise to a contact angle of ~ 70The contact angle fell to zero when Cu2O was formed on the copper surface and increased again to ~ 70͊when the potential was increased further. Voltammetry established that, in 0.01 M KOH, the presence of hydroxamate in concentrations of 10-3 M and above retards the rate of formation of Cu2O and indicates that a stability zone of copper n-octanohydroxamate replaces that of hydrated CuO. It is concluded that the development of a copper n-octanohydroxamate layer is responsible for the copper oxide surface being rendered hydrophobic at high potentials. SERS investigations of the copper/hydroxamate system is considered not to be an appropriate model for advancing understanding of the interaction of this collector with oxidized mineral surfaces.
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Conference Title
ELECTROCHEMISTRY IN MINERAL AND METAL PROCESSING 8 (EMMP 8)
Volume
28
Issue
6
Subject
Electrochemistry
Mining engineering