Much attention has been focused on the surface science of titanium dioxide due to its numerous scientific and industrial to its applications in photocatalysis, electrochemistry, active coatings, gas sensors. Among these studies, many have focused on the interaction of water with rutile and anatase (110) surfaces, due to the fundamental role of water in many of the present and potential applications of TiO2. The vast majority of experimental and theoretical understanding of the adsorption behaviour of water on TiO2(110) concerns gas phase adsorption in ultra-high vacuum environments (<1x10-10 mbar). Here we present work that has characterised the atomic scale structure and composition of the liquid water interface using surface X-ray diffraction. For rutile (110), a 2x1 an ordered interface of terminal hydroxyls is formed, with water in the second layer. The clean anatase (101) in UHV is found close to that calculated, with a mixture of hydroxyls and water at the interface with an ultrathin layer of H2O.

Structure comparison of rutile TiO<sub>2</sub>(110) and anatase TiO<sub>2</sub>(101) and their interfaces with water

248th National Meeting (2014)

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Structure comparison of rutile TiO2(110) and anatase TiO2(101) and their interfaces with water

Structure comparison of rutile TiO₂(110) and anatase TiO₂(101) and their interfaces with water