2021
DOI: 10.1021/acs.jpcc.1c07746
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Increasing Doping Solubility of RE3+ Ions in Fergusonite BiVO4 via Pressure-Induced Phase Transition

Abstract: Eu3+ ions doped bismuth vanadate powders were synthesized by a hydrothermal method, and the effect of Eu3+ ions doping on the crystal structure was investigated by X-ray diffraction (XRD), Raman, and UV–vis diffuse reflectance spectra. XRD and Raman results reveal that the doping solubility of Eu3+ ions in fergusonite-BiVO4 is extremely small. Above 0.5 mol % doping, a structural transition from fergusonite to zircon structure occurs. This phase transition results in band gap enhancement and thus limits its ph… Show more

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Cited by 10 publications
(6 citation statements)
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“…12,38 In our case, we know that T Trans = 523(1) K. In Figure 9, we show ε s and β90°versus temperature and fits using functions of the form ε s = A(|T − T Trans |) n and β90°= A(|T − T Trans |) n . In the first case, the best fit is obtained for n = 0.56 (7). In the second case, it is obtained for n = 0.48 (11).…”
Section: Compressibility and Thermal Expansionmentioning
confidence: 89%
See 1 more Smart Citation
“…12,38 In our case, we know that T Trans = 523(1) K. In Figure 9, we show ε s and β90°versus temperature and fits using functions of the form ε s = A(|T − T Trans |) n and β90°= A(|T − T Trans |) n . In the first case, the best fit is obtained for n = 0.56 (7). In the second case, it is obtained for n = 0.48 (11).…”
Section: Compressibility and Thermal Expansionmentioning
confidence: 89%
“…Bismuth vanadate (BiVO 4 ) has recently been under focus for its potential use in photocatalysis for hydrogen production via water splitting. , It has also attracted attention for decades because of its complex structural phase diagram, tunable properties when being doped, its rich polymorphism depending on preparation conditions, and external thermodynamic parameters . The high-pressure (HP) and high-temperature (HT) behavior of BiVO 4 has attracted attention for nearly half a century. , This compound is known to crystallize either into the stable monoclinic fergusonite-type polymorph (space group I 2/ a ) or in the metastable tetragonal zircon-type polymorph (space group I 4 1 / amd ) .…”
Section: Introductionmentioning
confidence: 99%
“…Below ∼5 GPa, these initial two peaks (011) and (110) have a tendency to shift to a middle state; above ∼5 GPa, they merge into one single peak (101), indicating that a fergusonite to scheelite transition occurred at ∼5 GPa. The transition pressure is almost three times higher than that in previous reports (∼1.5 GPa). ,,, At ∼ 10 GPa in the scheelite phase, the slope of the d 101 peak deviates, which can be regarded as a proof of a potential second-order phase transition; more experimental evidence can be found in later sections. Above ∼15 GPa, the (101) peak of the scheelite phase splits into two new peaks, indicating the occurrence of another phase transition.…”
Section: Resultsmentioning
confidence: 62%
“…The transition pressure is almost three times higher than that in previous reports (∼1.5 GPa). [11][12][13]16,17,21 At ∼ 10 GPa in the scheelite phase, the slope of the d 101 peak deviates, which can be regarded as a proof of a potential second-order phase transition; more experimental evidence can be found in later sections. Above ∼15 GPa, the (101) peak of the scheelite phase splits into two new peaks, indicating the occurrence of another phase transition.…”
Section: Resultsmentioning
confidence: 91%
“…In our previous research on ABO 4 compounds, such as BiVO 4 , 38,39 ZrGeO 4 40 and LaVO 4 , 41 it is believed that different polymorphic compounds will finally transform into the same high-pressure structure if the pressure is high enough. For example, the fergusonite-and zircon-type BiVO 4 finally transform into the same scheelite-BiVO 4 at high pressure.…”
Section: Resultsmentioning
confidence: 99%