Phonon properties of β-Ag2MoO4: Raman spectroscopy and ab initio calculations

Reduction of silver ions in molybdates: elucidation of framework acidity as the factor controlling charge balance mechanisms in aqueous zinc-ion electrolyte

“…1Mo exhibits peaks at 873, 762, 354 and 279 cm −1 , which are in agreement within ±1 cm −1 to the known A 1g , 2T 2g and E g stretches respectively. 52,53 m-2Mo has a major peak at 905 cm −1 with minor bands at 853, 828, 817, 760 and 694 cm −1 , which are in agreement within ±2 cm −1 to other data. 43 We are not aware of other Raman spectroscopy data for t-2Mo, which our results find a major peak at 913 cm −1 with minor bands at 864, 830, 662, 344 and 311 cm −1 .…”

Rietveld Refinement, Morphology, and Optical and Photoluminescence Properties of a β-Ag1.94Cu0.06MoO4 Solid Solution

“…The T 2g mode found at 86 cm −1 is associated with the symmetric stretching of the Mo−O groups. 19 The vibrational modes located at 873 cm −1 (A g ) and 761 cm −1 (T 2g ) are related to the stretching of the O−Mo−O groups, 18 while the E g mode at 277 cm −1 is due to the motion of the Ag + ions in the crystal lattice. 4 Finally, the mode located at 353 cm −1 (T 2g ) is attributed to the symmetric torsions from the [MoO 4 ] clusters.…”

“…2,8,14 Therefore, stick, 15 flower, 16 and potato 17 morphologies have been synthesized for these materials. β-Ag 2 MoO 4 has aroused great interest because of its good chemical stability at high temperatures, in addition to presenting a range of applications in different fields including energy storage, 18 antimicrobial agents, 1,2 photocatalysis, 19,20 and PL. 21,22 However, β-Ag 2 MoO 4 has an effective photon absorption in the ultraviolet region, which is limited to several photonics applications.…”

“…Molybdenum oxide compounds are a well-known semiconductor family that has been investigated for several applications such as catalysts, − sensors, , photocatalysts, , microbial agents, , and photoluminescence (PL). − Silver molybdate (Ag 2 MoO 4 ) is an important member of this family and has two polymorphs: α-Ag 2 MoO 4 with a tetragonal structure and α-Ag 2 MoO 4 , which exhibits a cubic spinel-like structure. ,, Therefore, stick, flower, and potato morphologies have been synthesized for these materials. β-Ag 2 MoO 4 has aroused great interest because of its good chemical stability at high temperatures, in addition to presenting a range of applications in different fields including energy storage, antimicrobial agents, , photocatalysis, , and PL. , However, β-Ag 2 MoO 4 has an effective photon absorption in the ultraviolet region, which is limited to several photonics applications. , For this reason, the insertion of dopants on these materials such as rare-earth metals have been extensively studied . Although the rare-earth metals are attractive candidates as dopants, a reduction in the availability coupled with demand has led to increased prices for these compounds.…”

Structure, optical properties, and photocatalytic activity of α-Ag2W0.75Mo0.25O4

“…3 shows the Raman spectra obtained both experimentally and theoretically for α-Ag experimental samples. The Raman spectra of α-Ag 2 WO 4 can be classified into (a) internal modes, and (b) external modes, as reported in the literature [2,[52][53][54]. In previous research [3,46] a map of available morphologies of the α-Ag 2 WO 4 crystals was obtained by using the Wulff construction, and it was found that, under equilibrium conditions, hexagonal rod-like morphologies with elongation along the [010] direction can be detected.…”