Abstract
The nature and speciation of ions, and their affinities to mineral surfaces are well-known for aqueous solutions, and less well-known for mixed water-organic and nonaqueous solutions. Weak acids show strong preferential adsorption of anions on titania, and support a high negative surface charge on titania particles in organic solvents in spite of the very low degree of dissociation of these acids. The interaction between solutions of weak acids in organic solvents and titania particles results in enhanced electrical conductance with respect to the original solutions (in the absence of titania). This phenomenon is explained in terms of surface-induced electrolytic dissociation of weak acids. In mixed water-organic solvents the conductance behavior gradually shifts from water-like behavior (titania depresses the conductance) to opposite behavior (titania enhances the conductance). A quantitative model was proposed to explain the complex effect of the electrolyte and titania concentration on the conductance of the dispersion and zeta potential of the particles.
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References
Kosmulski M, Prochniak P, Rosenholm JB (2009) J.Phys.Chem.C 113:12806
Kosmulski M, Prochniak P, Rosenholm JB (2010) Langmuir 26:1904
Kosmulski M, Prochniak P, Maczka E, Rosenholm JB (2010) J.Phys.Chem.C 114:17734
Gumtya SK, Lahiri SC, Aditya S (2002) Z.Phys.Chem. 216: 971
Bhattacharyya A, Maandal AK, Lahiri SC (1980) Electrochim.Acta 25: 559
Bandyopadhyay G, Lahiri SC (2002) Z.Phys.Chem. 216: 729
Kosmulski M (2010) Adsorption 16: 343
De Lisi R, Goffredi M, Turco Liveri V (1976) J.Chem.Soc.Faraday Trans 1 72: 436
De Lisi R, Goffredi M, Turco Liveri V (1978) J.Chem.Soc.Faraday Trans 1 74: 1096
De Lisi R, Goffredi M, Turco Liveri V (1980) J.Phys.Chem. 84: 307
Kosmulski M (2009) Surface Charging and Points of Zero Charge, Taylor and Francis, Boca Raton
Szczypa J, Wasowska L, Kosmulski M (1988) J. Colloid Interf.Sci. 126: 592
Acknowledgements
The authors acknowledge the Academy of Finland support for the Center of Excellence for Functional Materials and for Graduate School of Materials Support. Moreover the Academy of research contract, No. 116466 is acknowledged.
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Kosmulski, M., Dahlsten, P., Próchniak, P., Rosenholm, J.B. (2011). Surface Charge and Conductance in Dispersions of Titania in Nonaqueous and Mixed Solvents. In: Starov, V., Procházka, K. (eds) Trends in Colloid and Interface Science XXIV. Progress in Colloid and Polymer Science, vol 138. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-19038-4_10
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DOI: https://doi.org/10.1007/978-3-642-19038-4_10
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