Lattice dynamics calculations and high-pressure Raman spectra of the ZnMoO4

In Situ Construction of a Hydrophobic Honeycomb-like Structured ZnMoO4 Coating Applied for Enhancing Zinc Anode Performance

“…For the Zn@ZMO sample, the peak observed near 121 cm −1 corresponds to the bending, shearing, or translation patterns of the ZnO 6 unit. 45 The peak observed near 157 cm −1 corresponds to the librational modes of the MoO 4 units. 46 The peak of 332 cm −1 can be attributed to the combination of MoO 4 bending mode and ZnO 6 bending mode, suggesting the bridge action between Zn and Mo by oxygen.…”

Role of Physicochemical Features toward Bifunctional Redox Activity of Transition-Metal Molybdates

“…The XRD patterns indicated a monoclinic crystal structure with th C 2/ m space group for CoMo, and P 2/ c for NiMo while a triclinic structure with the P 1̅ space group for CuMo and ZnMo, resulting in the possibility of having A and B modes of vibrations whose ‘g’ modes are Raman active and ‘u’ modes are Fourier transform infrared (FTIR) active. In Figure E, it is obvious that the TMMos have stretching modes over 1000–900 cm –1 of Mo–O, including symmetric A g band of tetrahedron MoO 4 unit as well as the asymmetric mode of O–Mo–O at 900–800 cm –1 and bending modes over 400–200 cm –1 of Mo–O–TM along with significant differences in particular wavenumbers, which correspond to the fingerprints for each TM–O (TM = Co, Ni, Cu, and Zn). − The characteristic vibration for the TM–O–Mo bond was found at 342 cm –1 for CoMo, at 361 cm –1 for Ni–O–Mo, , at ∼326 cm –1 for CuMo, and at 321 and 496 cm –1 for a Zn–O system combined to the MoO 4 tetrahedron . The detailed notation of peaks has been documented in Table S6.…”

“…In Figure 2E, it is 27,28 at ∼326 cm −1 for CuMo, 29 and at 321 and 496 cm −1 for a Zn−O system combined to the MoO 4 tetrahedron. 25 The detailed notation of peaks has been documented in Table S6. The functionalities were further confirmed from the FTIR studies (Figure 2F), which showed a broad peak over 3500−3400 cm −1 corresponding to the associated −OH over the molybdate surfaces for all four TMMos along with the −O− H vibrations at ∼1620 and ∼1414 cm −1 , respectively.…”

Electronic, magnetic, optical properties, and morphological characteristics of nanocrystalline based on zinc–cobalt molybdate prepared by soft chemistry route

“…Usually, the symmetric stretching modes and antisymmetric stretching modes of MoO 4 tetrahedral units are Raman active and observed in the region 780-960 cm -1 [31]. For the ZnCoMo-0.3-600 sample, the symmetric Mo-O (ν1) band could be observed at 957 cm -1 and assigned as an intensive singlet in the Raman spectra, the band at 930 cm -1 was attributed to the symmetrical stretching modes of the MoO 4 anions [49]. The internal modes ν 3 (antisymmetric stretching, Bg), ν 3 (antisymmetric stretching, Eg), ν 4 (antisymmetric bending, Bg+Eg), ν 4 (symmetric stretching, Bg), and ν 2 (symmetric bending, Ag+Bg) are localized at 871, 852, 804, 358 and 325 cm −1 respectively [50].…”