| Title | Sulfur Dioxide Adsorption on ZnO Nanoparticles and Nanorods. |
| Publication Type | Journal Article |
| Year of Publication | 2011 |
| Journal | Journal of Physical Chemistry C |
| Volume | 115 |
| Issue | 20 |
| Pagination | 10164 - 10172 |
| Authors | Wu, Chia-Ming, Jonas Baltrusaitis, Edward G. Gillan, and Vicki H. Grassian |
| Publisher | American Chemical Society |
| ISBN Number | 1932-7447 |
| Keywords | sulfur dioxide adsorption zinc oxide nanoparticle nanorod |
| Abstract | ZnO nanomaterials, nanoparticles, and nanorods, were synthesized over a wide range of sizes with relatively high yield (∼90-95%). The synthesis method allows for size control by varying the amt. of water used and morphol. 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 studied using volumetric measurements, transmission FTIR spectroscopy, and XPS. Nanoparticles and nanorods of several different sizes were heated to 550° to remove surface-adsorbed org. ligands that remained after the synthesis prior to exposure to SO2. Spectroscopic anal. revealed the formation of several surface species, including sulfate, sulfite, sulfide, and weakly bound SO2. Quantifying surface speciation as well as the total amt. of adsorbed sulfur from XPS and volumetric data reveals that sulfur speciation as well as the total amt. of adsorbed sulfur is a function of particle size and morphol. [on SciFinder(R)] |