Solid-Solid Interface Formation in TiO2 Nanoparticle Networks

Baumann SO, Elser MJ, Auer M, Bernardi J, Huesing N, Diwald O (2011)

Publication Language: English

Publication Type: Journal article

Publication year: 2011

Journal

Langmuir American Chemical Society

Book Volume: 27

Pages Range: 1946-1953

Journal Issue: 5

DOI: 10.1021/la104213d

Abstract

Aiming at a comparison of microstructure and paramagnetic properties of mesoporous TiO$_2$ nanoparticle networks, we subjected entirely different TiO2$-$x precursor structures to vacuum annealing. The transformation of an amorphous TiO2$-$x gel---obtained by sol$-$gel processing of an ethylene glycol-modified titanium precursor---into a network of interconnected anatase nanocrystals was explored by means of X-ray diffraction, nitrogen sorption, and electron microscopy. Crystalline junctions between the particles emerge from temperature treatment. This process of particle network formation is different from that related to the vapor phase grown anatase nanocrystals where particle$-$particle interface formation is induced by contact with water. It was found that, after annealing up to 873 K and controlled sample purification in oxygen atmosphere, both types of samples exhibit high concentrations of particle$-$particle interfaces and comparable properties in terms of surface area, porosity, and microstructure. With electron paramagnetic resonance (EPR) we observed on nonstoichiometric TiO2$-$x networks an identical type of subsurface defect which is related to the presence of solid$-$solid interfaces.

Authors with CRIS profile

Michael Auer Lehrstuhl für Feststoff- und Grenzflächenverfahrenstechnik Oliver Diwald Professur für Partikelsynthese

Additional Organisation(s)

Exzellenz-Cluster Engineering of Advanced Materials

Involved external institutions

Universität Ulm DE Germany (DE) Technische Universität Wien / Vienna University of Technology AT Austria (AT)

How to cite

APA:

Baumann, S.O., Elser, M.J., Auer, M., Bernardi, J., Huesing, N., & Diwald, O. (2011). Solid-Solid Interface Formation in TiO2 Nanoparticle Networks. Langmuir, 27(5), 1946-1953. https://dx.doi.org/10.1021/la104213d

MLA:

Baumann, Stefan O., et al. "Solid-Solid Interface Formation in TiO2 Nanoparticle Networks." Langmuir 27.5 (2011): 1946-1953.

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