Infrared and Raman spectral studies and normal modes of α-Bi2O3

Fabrication and photocatalytic property of α-Bi2O3 nanoparticles by femtosecond laser ablation in liquid

“…The power sample was obtained by evaporating the solutions at 80 • C for 4 h which was produced by femtosecond laser abla- [24,25]. And the polymorphs strongly depend on the synthesis method.…”

Infrared activity in the Aurivillius layered ferroelectricSrBi2Ta2OMoret1, Zallen2, Newnham3 et al. 1998Phys. Rev. B606290View full textAdd to dashboardCite

“…Since only the strongest infrared modes of SBT are reported here, complementarity makes it unlikely that the Raman lines seen at 607 and 812 cm Ϫ1 arise from the similar-frequency TO and LO modes found in Tables II and III. Comparisons to some simpler oxides can be made, as is sometimes attempted for phonons in the similarly complex bismuth-based cuprate superconductors. 33 Bi 2 O 3 presents a dense spectrum of infrared and Raman lines from 540 cm Ϫ1 downward, including infrared bands 33 at 38 and 58 cm Ϫ1 ͑below our infrared range of measurement͒ and Raman bands 34 near 60 cm Ϫ1 . It is likely that bismuth displacements play a major role in the eigenvectors corresponding to the two low-frequency Raman lines listed in Table III.…”

Studying Impact of Different Precipitating Agents on Crystal Structure, Morphology and Photocatalytic Activity of Bismuth Oxide

“…[22]) shows sharp and intense vibration band at 1200-1700 cm -1 indicating the presence of nitrate (NO3) and has been discussed previously [22]. Peaks observed between 3200-3600 cm -1 indicate the presence of OH groups [24,25]. The absence of dominant peaks between 1200-1700 cm -1 and 3200-3600 cm -1 in Figure 5 indicate the absence of both nitrate and hydroxide groups on the Bi2O3 surface.…”

“…The absence of dominant peaks between 1200-1700 cm -1 and 3200-3600 cm -1 in Figure 5 indicate the absence of both nitrate and hydroxide groups on the Bi2O3 surface. Moreover, the observed vibrational band between wavenumber 700-600 cm -1 and at ~830 cm -1 can be assigned to Bi-O-Bi vibration [24][25][26][27].…”