Journal ArticleDOI
Funktionelle Gruppen an Festkörper-Oberflächen
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TLDR
An der Oberflache von Festkorpern sind haufig strukturfremde Atome oder Atomgruppierungen gebunden.Abstract:
An der Oberflache von Festkorpern sind haufig strukturfremde Atome oder Atomgruppierungen gebunden Die Chemie dieser „End-Gruppen” an der Festkorperoberflache wird an einigen Beispielen besprochen Bei Diamant und graphitischem Kohlenstoff und auch noch bei Siliciumdioxid sind die Fremdatome covalent gebunden, wahrend bei Titandioxid und Aluminiumoxid vorwiegend ionenartige Bindung der Oberflachengruppen vorliegt Oxide sind normalerweise mit einer monomolekularen Hydroxidschicht bedeckt Wertigkeitsanderungen der Metallatome fuhren zu Veranderungen der Aciditat der Oberflache; bei der Reduktion oberflachenstandiger Ti4+-Ionen bekommt die TiO2-Oberflache sauren Charakterread more
Citations
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Alternative Methods for the Preparation of Gold Nanoparticles Supported on TiO2
TL;DR: In this article, the authors investigated other methods of preparation of Au/TiO2 catalysts to obtain small gold metal particles (2−3 nm) and a higher Au loading.
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Space charge regions in solid two-phase systems and their conduction contribution—I. Conductance enhancement in the system ionic conductor-'inert' phase and application on AgC1:Al2O3 and AgC1:SiO2
TL;DR: In this paper, the authors calculated the space charge contribution to the conductance for two-phase systems (bicrystal and dispersion) where the second phase is a "chemically inert" phase such as alumina and silica.
Journal ArticleDOI
Degradation and stabilisation of polymers and coatings: nano versus pigmentary titania particles
Norman S. Allen,Michele Edge,Amaya Ortega,Gonzalo Sandoval,Christopher M. Liauw,Joanna Verran,John Stratton,Robert Mcintyre +7 more
TL;DR: A series of nano and micron particle size anatase and rutile titanium dioxide pigments have been prepared with various densities of surface treatments, particle size and surface area.
Journal ArticleDOI
Degradation and stabilization of polyurethane elastomers
TL;DR: In this article, a comprehensive survey of the literature regarding various types of degradation of polyurethane elastomers, including photo-, thermal, ozonolytic, hydrolytic, chemical, enzymatic, in-vivo/in-vitro oxidative, biological, and mechanical degradation, is presented.
References
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Journal ArticleDOI
On a Theory of the van der Waals Adsorption of Gases
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An infrared study of pyridine adsorbed on acidic solids. Characterization of surface acidity
TL;DR: In this article, the infrared spectrum of pyridine coordinately bonded to the surface of acid solids has been determined and a rough estimate of the strength of surface Lewis sites can be inferred.
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Structure and Adsorption Characteristics of Clean Surfaces of Germanium and Silicon
R. E. Schlier,H. E. Farnsworth +1 more
TL;DR: In this paper, the surface structures of clean (100) and (110) germanium surfaces were observed and the results indicated that these structures were not due to contamination but to the silicon itself.