Grazing-Incidence XAFS Study of Aqueous Zn(II) Sorption on α-Al2O3 Single Crystals
作者： Thomas P. Trainor , Jeffrey P. Fitts , Alexis S. Templeton , Daniel Grolimund , Gordon E. Brown
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摘要: Abstract Grazing-incidence XAFS spectroscopy was applied to study the sorption of Zn(II) on two crystallographically distinct surfaces highly polished sapphire single crystals as a simplified analog for metal ion natural aluminum-(hydr)oxides. Experiments were performed both in situ (in contact with bulk solution) and ex humidified N2 atmosphere. The identification an Al shell at roughly 3 A all samples indicates that binds inner sphere complex (0001) (1–102) surfaces. first Zn–O distances 1.97–1.99 suggest Zn is fourfold coordination oxygen samples. However, sample drying appears have induced formation polynuclear surface complexes closer values expected sixfold (2.06–2.07 A). results presented here show characterization products crystal using feasible if solution conditions are chosen carefully.
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Robert E. Mesmer, Charles F. Baes, The hydrolysis of cations ,(1976)
J.-B. d'Espinose de la Caillerie, C. Bobin, B. Rebours, O Clause, Alumina/water interfacial phenomena during impregnation Studies in Surface Science and Catalysis. ,vol. 91, pp. 169- 184 ,(1995) , 10.1016/S0167-2991(06)81754-4
K. U. Goss, S. J. Hug, S. Haderlein, L. Sigg, C. Ludwig, H. Harms, Sorption phenomena at environmental solid surfaces Chimia. ,vol. 51, pp. 893- 899 ,(1997)
John R. Bargar, Steven N. Towle, Gordon E. Brown, George A. Parks, Outer-sphere Pb(II) adsorbed at specific surface sites on single crystal α-alumina Geochimica et Cosmochimica Acta. ,vol. 60, pp. 3541- 3547 ,(1996) , 10.1016/0016-7037(96)00222-0
Steven N Towle, Gordon E Brown, George A Parks, Sorption of Co(II) on Metal Oxide Surfaces Journal of Colloid and Interface Science. ,vol. 217, pp. 299- 311 ,(1999) , 10.1006/JCIS.1999.6264
P. H. Citrin, Bond lengths and coordination numbers from L2,3-edge versus K-edge surface extended x-ray-absorption fine structure. Physical Review B. ,vol. 31, pp. 700- 721 ,(1985) , 10.1103/PHYSREVB.31.700
Ping Liu, Tom Kendelewicz, Gordon E Brown, Erik J Nelson, Scott A Chambers, Reaction of water vapor with α-Al2O3(0001) and α-Fe2O3(0001) surfaces : synchrotron X-ray photoemission studies and thermodynamic calculations Surface Science. ,vol. 417, pp. 53- 65 ,(1998) , 10.1016/S0039-6028(98)00661-X
J. P. Fitts, T. P. Trainor, D. Grolimund, J. R. Bargar, G. A. Parks, G. E. Brown, Grazing‐incidence XAFS investigations of Cu(II) sorption products at α‐Al2O3–water and α‐SiO2–water interfaces Journal of Synchrotron Radiation. ,vol. 6, pp. 627- 629 ,(1999) , 10.1107/S0909049599001375
G. Waychunas, J. Davis, R. Reitmeyer, GIXAFS study of Fe3+ sorption and precipitation on natural quartz surfaces Journal of Synchrotron Radiation. ,vol. 6, pp. 615- 617 ,(1999) , 10.1107/S0909049599001764
J. J. Rehr, J. Mustre de Leon, S. I. Zabinsky, R. C. Albers, Theoretical X-ray Absorption Fine Structure Standards Journal of the American Chemical Society. ,vol. 113, pp. 5135- 5140 ,(1991) , 10.1021/JA00014A001