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Issue 20, 2020
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F-doping of nanostructured ZnO: a way to modify structural, electronic, and surface properties

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Abstract

Polycrystalline ZnO is a material often used in heterogeneous catalysis. Its properties can be altered by the addition of dopants. We used gaseous fluorine (F2(g)) as direct way to incorporate fluoride in ZnO as anionic dopants. Here, the consequences of this treatment on the structural and electronic properties, as well as on the acidic/basic sites of the surface, are investigated. It is shown that the amount of F incorporation into the structure can be controlled by the synthesis parameters (t, T, p). While the surface of ZnO was altered as shown by, e.g., IR spectroscopy, XPS, and STEM/EDX measurements, the F2 treatment also influenced the electronic properties (optical band gap, conductivity) of ZnO. Furthermore, the Lewis acidity/basicity of the surface was affected which is evidenced by using, e.g., different probe molecules (CO2, NH3). In situ investigations of the fluorination process offer valuable insights on the fluorination process itself.

Graphical abstract: F-doping of nanostructured ZnO: a way to modify structural, electronic, and surface properties

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Supplementary files

Article information


Submitted
31 Jan 2020
Accepted
04 Apr 2020
First published
06 Apr 2020

This article is Open Access

Phys. Chem. Chem. Phys., 2020,22, 11273-11285
Article type
Paper

F-doping of nanostructured ZnO: a way to modify structural, electronic, and surface properties

E. H. Wolf, M. Millet, F. Seitz, F. A. Redeker, W. Riedel, G. Scholz, W. Hetaba, D. Teschner, S. Wrabetz, F. Girgsdies, A. Klyushin, T. Risse, S. Riedel and E. Frei, Phys. Chem. Chem. Phys., 2020, 22, 11273
DOI: 10.1039/D0CP00545B

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