5-METHYL-2-MERCAPTOBENZOXAZOLE ADSORBED ON CU2S SURFACE STUDIED BY SYNCHROTRON-RADIATION EXCITED PHOTOEMISSION

Synchrotron radiation excited photoemission spectroscopy studies have been carried out on 5-methyl-2-mercaptobenzoxazole adsorbed on Cu2S su rface. This paper reports one of the first applications of this techni que in the field of mineral processing investigations. The use of sync hrotron photon source permits investigation of the real first stage of adsorption, because of the high surface sensitivity. S 2p and O 1s sp ectra for the Cu2S surface after immersion in 5-methyl-2-mercaptobenzo xazole solutions at different solution concentrations (10(-6) M and 10 (-5) M) and different contact times (1 min and 15 min), together with those for UHV-cleaved Cu2S at205 eV and 555 eV photon energies an pres ented and discussed. (C) 1997 Elsevier Science B.V.