Yttrium and Titanium Bismuthates with Structures Related to β-Bi2O3

Ducke, Jana; Trömel, M.; Hohlwein, D.; Kizler, P.

doi:10.1107/s0108270195011267

Cited by 17 publications

(15 citation statements)

References 5 publications

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“…85 The same effect of increasing annealing temperature on the cell volume V, density D x , and crystallite size d P was obtained for the samples of BiCeO-a−BiCeO-d (Table S6). 86 Thus, the unit cells of BiCeO-a−BiCeO-d are slightly increased in comparison to the undoped samples BiOa−BiO-d, resulting in a lower density. In β-Bi 2 O 3 :Ce, the metal−oxygen bonds are in the range of 2.01(6)−2.99(2) Å for Bi1/Ce1−O1, 2.106(16)−2.71(3) Å for Bi1/Ce1−O2, and 2.332(7)− 2.393(3) Å for Bi1/Ce1−O3, respectively (Table S7).…”

Section: ■ Discussionmentioning

confidence: 97%

From a Cerium-Doped Polynuclear Bismuth Oxido Cluster to β-Bi₂O₃:Ce

et al. 2020

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The simultaneous hydrolysis of Bi(NO 3 ) 3 •5H 2 O and Ce(NO 3 ) 3 •6H 2 O results in the formation of novel heterometallic bismuth oxido clusters with the general formula [Bi 38 O 45 (NO 3 ) 24 (DMSO) 28+δ ]:Ce (DMSO = dimethyl sulfoxide; cerium content <1.50%), which is demonstrated by single-crystal X-ray diffraction analysis. The incorporation of cerium into the cluster core is a result of the interplay of hydrolysis and condensation of the metal nitrates in the presence of oxygen. Diffuse-reflectance UV−vis and X-ray photoelectron spectroscopy reveal the presence of Ce IV in the final bismuth oxido clusters as a result of oxidation of the cerium source. The cerium atoms are statistically distributed mainly on the bismuth atom positions of the central [Bi 6 O 9 ] motif of the [Bi 38 O 45 ] cluster core. Hydrolysis and subsequent annealing of the bismuth oxido clusters in the temperature range of 300−400 °C provides β-Bi 2 O 3 :Ce samples with slightly lowered band gaps of approximately 2.3 eV compared to the undoped β-Bi 2 O 3 (approximately 2.4 eV). The sintering behavior of β-Bi 2 O 3 is significantly affected by the cerium dopant. Finally, differences in the efficiency of the asprepared β-Bi 2 O 3 :Ce and undoped β-Bi 2 O 3 samples in the photocatalytic decomposition of the biocide triclosan in an aqueous solution under visible-light irradiation are demonstrated.

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Section: ■ Discussionmentioning

confidence: 97%

From a Cerium-Doped Polynuclear Bismuth Oxido Cluster to β-Bi₂O₃:Ce

et al. 2020

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“…The formation of a β-Bi 2 O 3 -type tetragonal phase during annealing implies that oxide-ion vacancy ordering occurs along 〈100〉 directions [58,59], and not along 〈111〉 directions which is the case for (BiO 1.5 ) 0.80 (ErO 1.5 ) 0.20 . This explains the different σ/σ 0 values after 48 h annealing for the Pb 2+ -doped materials compared to (BiO 1.5 ) 0.80 (ErO 1.5 ) 0.20 in the (BiO 1.5 ) 0.80 (ErO 1.5 ) 0.20−x (PbO) x series.…”

Section: Methodsmentioning

confidence: 95%

“…Rather than use a constrained occupancy refinement approach, additional oxide-ion sites O3 and O4, in 2a and 2b sites at (0,0,0) and (0,0,1/2), respectively, were incorporated into the model, after the NPD-based structural work of Ducke [59]. O3 and O4 had zero occupancy in the new input model, and the occupancies of O1 and O2 were reset to their starting values of 0.97.…”

Section: Methodsmentioning

confidence: 99%

The structural and conductivity evolution of fluorite-type Bi2O3–Er2O3–PbO solid electrolytes during long-term annealing

et al. 2008

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“…Recently, there has been interest in phases with a Bi:M ratio of 14:1 (6.67 mol% substitution), such as Bi 14 ReO 24. 5 8,9 and Bi 14 MO 24 (where M = W, Mo, Cr) 10 . Bi 14 ReO 24.5 exhibits exceptionally high conductivity at intermediate temperatures, in the order of 10 -3 S cm -1 at 300°C.…”

Section: Introductionmentioning

confidence: 99%