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Adsorption interaction of carrier-free thallium species with gold and quartz surfaces

Serov, A. ; Eichler, Robert ; Dressler, Rugard ; Piguet, D. ; Türler, Andreas ; Vögele, A. ; Wittwer, David ; Gäggeler, H. W.

In: Radiochimica Acta, 2013, vol. 101, no. 7, p. 421-426

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    Titre
    • Adsorption interaction of carrier-free thallium species with gold and quartz surfaces
    Auteur
    • Serov, A.. Paul Scherrer Institute, Laboratory for Radiochemistry, Villigen, Schweiz
    • Eichler, Robert. E-mail: robert.eichler@psi.ch
    • Dressler, Rugard. Paul Scherrer Institut, Laboratory for Radio-and Environmental Chemistry, Villigen, Schweiz
    • Piguet, D.. Paul Scherrer Institut, Laboratory for Radiochemistry, Villigen, Schweiz
    • Türler, Andreas. Universität Bern, Department für Chemie und Biochemie, Bern, Schweiz
    • Vögele, A.. Paul Scherrer Institute, Laboratory for Radiochemistry, Villigen, Schweiz
    • Wittwer, David. Paul Scherrer Institute, Laboratory of Radio- and Environmental Chemistry, Villigen, Schweiz
    • Gäggeler, H. W.. Paul Scherrer Institute, Laboratory of Radio- and Environmental Chemistry, Villigen, Schweiz
    Type de document
    • Postprint
    Langue
    • Anglais
    Publié dans
    • Radiochimica Acta, 2013, vol. 101, no. 7, p. 421-426. Oldenbourg Wissenschaftsverlag GmbH
    Autre version électronique
    Identifiant OAI-PMH
    • oai:doc.rero.ch:295531
    Summary
    The adsorption interactions of thallium and its compounds with gold and quartz surfaces were investigated. Carrier-free amounts of thallium were produced in nuclear fusion reactions of alpha particles with thick gold targets. The method chosen for the studies was gas thermochromatography and varying the redox potential of the carrier gases. It was observed that thallium is extremely sensitive to trace amounts of oxygen and water, and can even be oxidized by the hydroxyl groups located on the quartz surface. The experiments on aquartz surface with O2, He, H2 gas in addition with water revealed the formation and deposition of only one thallium species - TlOH. The adsorption enthalpy was determined to be Δ HSiO2ads(TlOH) = −134±5kJ mol−1. Aseries of experiments using gold as stationary surface and different carrier gases resulted in the detection of two thallium species - metallic Tl (H2 as carrier gas) and TlOH (O2, O2+H2O and H2+H2O as pure carrier gas or carrier gas mixture) with Δ HAuads(Tl) = −270±10kJ mol− and Δ HAuads(TlOH) = −146±3kJ mol−1. These data demonstrate a weak interaction of TlOH with both quartz and gold surfaces. The data represent important information for the design of future experiments with the heavier homologue of Tl in group 13 of the periodic table - element 113 (E113)