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Rath T, Kunert B, Resel R, et al. Investigation of primary crystallite sizes in nanocrystalline ZnS powders: comparison of microwave assisted with conventional synthesis routes. Inorg Chem. 2008;47(8):3014-22doi: 10.1021/ic7017715.
Rath, T., Kunert, B., Resel, R., Fritz-Popovski, G., Saf, R., & Trimmel, G. (2008). Investigation of primary crystallite sizes in nanocrystalline ZnS powders: comparison of microwave assisted with conventional synthesis routes. Inorganic chemistry, 47(8), 3014-22. https://doi.org/10.1021/ic7017715
Rath, Thomas, et al. "Investigation of primary crystallite sizes in nanocrystalline ZnS powders: comparison of microwave assisted with conventional synthesis routes." Inorganic chemistry vol. 47,8 (2008): 3014-22. doi: https://doi.org/10.1021/ic7017715
Rath T, Kunert B, Resel R, Fritz-Popovski G, Saf R, Trimmel G. Investigation of primary crystallite sizes in nanocrystalline ZnS powders: comparison of microwave assisted with conventional synthesis routes. Inorg Chem. 2008 Apr 21;47(8):3014-22. doi: 10.1021/ic7017715. Epub 2008 Mar 20. PMID: 18351732.
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Inorg Chem. 2008 Apr 21;47(8):3014-22. doi: 10.1021/ic7017715. Epub 2008 Mar 20.

Investigation of primary crystallite sizes in nanocrystalline ZnS powders: comparison of microwave assisted with conventional synthesis routes.

Inorganic chemistry

Thomas Rath, Birgit Kunert, Roland Resel, Gerhard Fritz-Popovski, Robert Saf, Gregor Trimmel

Affiliations

  1. Institute for Chemistry and Technology of Organic Materials, Graz University of Technology, Stremayrgasse 16, Graz, Austria.

PMID: 18351732 DOI: 10.1021/ic7017715

Abstract

ZnS powders with primary crystallite sizes of only a few nanometers were prepared by three different synthesis routes at temperatures below 130 degrees C. The reaction of zinc acetate dihydrate with thioacetamide (TAA) in the presence of pyridine and triphenylphosphite (TPP) was carried out using either conventional heating or microwave heating. The obtained powders exhibit sphalerite structure as determined by X-ray diffraction (XRD). The primary crystallites have diameters between 1 and 7 nm obtained by XRD. Small angle X-ray scattering (SAXS) measurements were analyzed by the model-free inverse Fourier-transformation approach, as well as by a hard sphere-model from which particle size and polydispersity were extracted. The particle sizes by SAXS are in good agreement with the primary crystallite sizes obtained by XRD. It has been found that an increasing amount of sulfur and/or using microwave heating increases crystallite sizes. The presence of TPP decreases the particle sizes but no significant influence on the TPP concentration was observed. In the alternative third preparation route, hexamethyldisilathiane (HMDST) was used as precipitation reagent at ambient temperature, which leads to the smallest crystallite sizes of only 1 nm together with low polydispersities. Scanning electron microscopy, dynamic light scattering and UV-vis spectroscopy showed that all three synthesis routes lead to ZnS powders with aggregate sizes between 650 and 1200 nm. Both of the TAA-precipitation routes lead to spherical agglomerates which consist of spherical substructures, whereas the HMDST agglomerates are assembled from elongated objects.

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