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Synthesis and characterization of mixed-morphology CePO4 nanoparticles |
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| Authors: | L Karpowich Rong Yu JA Reimer |
| Institution: | a Department of Materials Science and Engineering, University of California at Berkeley, Berkeley, CA 94720, USA b Department of Chemical Engineering, University of California at Berkeley, Berkeley, CA 94720, USA c Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA |
| Abstract: | Cerium phosphate nanoparticles with diameters of 10-180 nm were synthesized by a variety of solution techniques. X-ray diffraction (XRD) determined the crystalline phase(s) present in each sample. Population, shift, and spin-lattice relaxation 31P solid-state nuclear magnetic resonance (NMR) measurements accounted for all the 31P nuclei expected in each sample, and were able to distinguish between phosphorous nuclei in different environments and phases. Transmission electron microscopy (TEM) characterized the morphology and crystallinity of the powder samples as well as of the sintered compacts of the powders. In conjunction with TEM, energy-dispersive spectroscopy (EDS) provided a measure of the composition of the bulk intergranular regions within each CePO4 sample. The presence of an amorphous, phosphate-rich intergranular phase was found in those samples prepared by dissolution of ceria in H3PO4 under various conditions. |
| Keywords: | CePO4 Cerium phosphate Monazite Nanoparticle 31P solid-state NMR |
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