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- W2332007122 abstract "A novel, fast combustion method for synthesizing anatase TiO2 nanoparticles (average diameter ∼14 nm) codoped with N and Nb in a single step is reported. XRD, STEM-EDX, and XPS measurements confirm that Nb ions are incorporated into the tetragonal lattice on Ti sites, while N ions occupy O sites, and likely also interstitial sites. Sintering of pellets of codoped powders under reducing conditions produced polycrystalline samples with the rutile structure. Chemically tuned samples have power factors up to 9.87 × 10–4 W m–1 K–2, 7 times higher than that of pure TiO2 sintered under the same conditions. In addition, the thermal conductivity is considerably lower at 2.6–4.0 W m–1 K–1 as a result of greater grain-boundary and point-defect scattering. The figure of merit, ZT, is improved to 0.35 at 700 °C, which is the highest value reported for a TiO2 material to date, and is comparable to the highest values of any n-type thermoelectric oxide. Our material also exhibits good thermal stability in a pure N2 atmos..." @default.
- W2332007122 created "2016-06-24" @default.
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- W2332007122 date "2013-05-23" @default.
- W2332007122 modified "2023-09-28" @default.
- W2332007122 title "Chemical Tuning of TiO<sub>2</sub> Nanoparticles and Sintered Compacts for Enhanced Thermoelectric Properties" @default.
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- W2332007122 doi "https://doi.org/10.1021/jp401132g" @default.
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