Thermally Induced Growth of ZnO Nanocrystals on Mixed Metal Oxide Surfaces

Inayat A, Makky A, Giraldo J, Kuhnt A, Busse C, Schwieger W (2014)


Publication Status: Published

Publication Type: Journal article

Publication year: 2014

Journal

Publisher: Wiley-VCH Verlag

Book Volume: 20

Pages Range: 8161-8169

DOI: 10.1002/chem.201304484

Abstract

An in situ method for the growth of ZnO nanocrystals on Zn/Al mixed metal oxide (MMO) surfaces is presented. The key to this method is the thermal treatment of Zn/Al layered double hydroxides (Zn/Al LDHs) in the presence of nitrate anions, which results in partial demixing of the LDH/MMO structure and the subsequent crystallization of ZnO crystals on the surface of the forming MMO layers. In a first experimental series, thermal treatment of Zn/Al LDHs with different fractions of nitrate and carbonate in the interlayer space was examined by thermogravimetry coupled with mass spectrometry (TG-MS) and in situ XRD. In a second experimental series, Zn/Al LDHs with only carbonate in the interlayer space were thermally treated in the presence of different amounts of an external nitrate source (NH4NO3). All obtained Zn/Al MMO samples were analysed by electron microscopy, nitrogen physisorption and powder X-ray diffraction. The gas phase formed during nitrate decomposition turned out to be responsible for the formation of crystalline ZnO nanoparticles. Accordingly, both interlayer nitrate and the presence of ammonium nitrate led to the formation of supported ZnO nanocrystals with mean diameters between 100 and 400 nm, and both methods offer the possibility to tailor the amount and size of the ZnO crystals by means of the amount of nitrate.

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APA:

Inayat, A., Makky, A., Giraldo, J., Kuhnt, A., Busse, C., & Schwieger, W. (2014). Thermally Induced Growth of ZnO Nanocrystals on Mixed Metal Oxide Surfaces. Chemistry - A European Journal, 20, 8161-8169. https://doi.org/10.1002/chem.201304484

MLA:

Inayat, Alexandra, et al. "Thermally Induced Growth of ZnO Nanocrystals on Mixed Metal Oxide Surfaces." Chemistry - A European Journal 20 (2014): 8161-8169.

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