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  • Title: Study of N-isopropoxypropyl-N'-ethoxycarbonyl thiourea adsorption on chalcopyrite using in situ SECM, ToF-SIMS and XPS.
    Author: Liu G, Qiu Z, Wang J, Liu Q, Xiao J, Zeng H, Zhong H, Xu Z.
    Journal: J Colloid Interface Sci; 2015 Jan 01; 437():42-49. PubMed ID: 25310581.
    Abstract:
    In situ scanning electrochemical microscopy (SECM) was used to study N-isopropoxypropyl-N'-ethoxycarbonyl thiourea (iPOPECTU) adsorption on chalcopyrite. The in situ SECM images indicated a preferential adsorption of iPOPECTU on chalcopyrite surfaces, resulting in a decrease in the probing electrochemical current response. The surfaces after iPOPECTU adsorption were analyzed by time-of-flight secondary ion mass spectrometry (ToF-SIMS) and X-ray photoelectron spectroscopy (XPS). ToF-SIMS results provided a strong evidence of iPOPECTU binding with copper only. XPS analysis showed the reduction of cupric to cuprous on chalcopyrite surfaces as a result of iPOPECTU adsorption. Our results shed light on adsorption mechanism of iPOPECTU on the surface of chalcopyrite samples.
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