Abstract
ZnO nanomaterials, nanoparticles, and nanorods, have been synthesized over a wide range of sizes with relatively high yield (∼90–95%). The synthesis method allows for size control by varying the amount of water used and morphology control by varying the zinc precursor (zinc acetate for nanoparticles or zinc acetylacetonate for nanorods). These nanomaterials were analyzed with powder X-ray diffraction and attenuated total reflection FTIR spectroscopy. Sulfur dioxide adsorption on nanoparticles and nanorods of different size was then investigated using volumetric measurements, transmission FTIR spectroscopy, and X-ray photoelectron spectroscopy. Nanoparticles and nanorods of several different sizes were heated to 550 °C to remove surface-adsorbed organic ligands that remained after the synthesis prior to exposure to SO2. Spectroscopic analysis revealed the formation of several surface species, including sulfate, sulfite, sulfide, and weakly bound SO2. Quantifying surface speciation as well as the total amou...
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