Influence of europium doping on the structural phase-transition temperature of β− and α−CoMoO4 polymorphs
Source abstract
Abstract
Abstract This work presents a new possibility to increase the phase transition temperature of CoMoO 4 polymorphs (β and α) by europium doping. The material Co 0.98 Eu 0.02 MoO 4 was produced by the co-precipitation method and its thermochromic property was investigated. An accurate characterization of the material was performed using X-ray diffraction, Raman spectroscopy, diffuse reflectance spectroscopy, thermal analysis, and morphological analysis. The results showed that an irreversible first order phase transition between the two allotropic forms occurred at around 950 oC, and it is associated with a drastic color change from purple (beta) to green (alpha). This color change confirmed the promising potential of the material for use as a temperature indicator that could be observed by the naked eye. Photoluminescence spectroscopy helped to elucidate the effect of the presence of europium added to the cobalt molybdate, which also enabled the material to be used as a light emitter under UV excitation.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Polyoxometalates: Synthesis and Applications · Transition Metal Oxide Nanomaterials · Pigment Synthesis and Properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (51)
Show source-provided references
1. Characterization of oxide catalysts using time-resolved XRD and XANES: properties of pure and sulfide CoMoO4 and NiMoO410.1016/S0167-2991(00)80894-0 ↗
2. Investigation of the first-order phase transition in the Co1-xMgxMoO4 solid solution and discussion of the associated thermochromic behavior10.1021/ic102079f ↗
3. Photoluminescent properties of CoMoO4 nanorods quickly synthesized and annealed in a domestic microwave oven10.4236/aces.2012.24057 ↗
4. Interconnected network of CoMoO4 submicrometer particles as high capacity anode material for lithium ion batteries10.1021/am302583c ↗
5. Facile and large scale combustion synthesis of α-CoMoO4: mimics the redox behavior of a battery in aqueous hybrid device10.1016/j.cej.2014.05.068 ↗
6. Facile fabrication of CoMoO4 nanorods as electrode material for electrochemical capacitors10.1016/j.matlet.2012.12.057 ↗
7. Synthesis, characterization, and electrochemical properties of CoMoO4 nanostructures10.1016/j.ijhydene.2014.01.069 ↗
8. Hydrothermal synthesis of carbon- and reduced graphene oxide-supported CoMoO4 nanorods for supercapacitor10.1007/s11581-014-1089-0 ↗
9. Selective synthesis and novel properties of single crystalline α-CoMoO4 nanorods/nano whiskers10.1016/j.matlet.2006.08.028 ↗
10. Preparation of molybdates with antibacterial property10.4028/www.scientific.net/KEM.368-372.1516 ↗
11. Solution process for the synthesis of “high-pressure” phase CoMoO4 and X-ray single crystal resolution10.1039/b110760g ↗
12. Sub-micrometric β-CoMoO4 rods: optical and piezochromic properties10.1039/c3dt51656c ↗
13. CoMoO4/CuMo0.9W0.1O4 mixture as an efficient piezochromic sensor to detect temperature/pressure shock parameters10.1021/am508652h ↗
14. Transition metal molybdates of the type AMoO410.1021/ic50066a050 ↗
15. Co1-xMgxMoO4 compounds for pressure indicators10.1021/am2001218 ↗
16. Synthesis and improved electrochemical performances of nano β-NiMoO4–CoMoO4.xH2O composites for asymmetric supercapacitors10.1039/c3ra43021a ↗
17. Eu3+ luminescence from different sites in a scheelite-type cadmium molybdate red phosphor with vacancies10.1039/C5TC01109D ↗
18. Formation mechanism and optical properties of CdMoO4 and CdMoO4:Ln3+ (Ln = Pr, Sm, Eu, Dy, Ho and Er) microspheres synthesized via a facile sonochemical route10.1039/C4RA05038J ↗
19. Some misconceptions concerning the electronic spectra of tri-positive europium and cerium10.1039/c3cs60033e ↗
20. Comparative investigations of the crystal structure and photoluminescence property of eulytite-type Ba3Eu(PO4)3 and Sr3Eu(PO4)310.1039/C4DT03887H ↗
21. Structure, thermal stability, and spectroscopic properties of triclinic double sulfate AgEu(SO4)2 with isolated SO4 groups10.1021/acs.inorgchem.8b01837 ↗
22. Lanthanide orthoantimonate light emitters: structural, vibrational, and optical properties10.1021/cm502504b ↗
23. Hayes · 1978
24. Crystal structure of cobalt molybdate hydrate CoMoO4.nH2O10.1016/j.jssc.2005.06.014 ↗
25. Investigation of polymorphism and vibrational properties of MnMoO4 microcrystals prepared by hydrothermal process10.1021/acs.cgd.8b00102 ↗
26. General synthesis and phase control of metal molybdate hydrates MMoO4·nH2O (M = Co, Ni, Mn, n = 0, ¾, 1) nano/microcrystals by a hydrothermal approach: magnetic, photocatalytic and electrochemical properties10.1021/ic8007975 ↗
27. Hydrothermal process for the fabrication of CoMoO4.0.9H2O nanorods with excellent electrochemical behavior10.1039/c2nj40278e ↗
28. Cobalt and other transition metal molybdate catalysts10.1016/0022-5088(74)90112-X ↗
29. The crystal structure of colbat molybdate CoMoO410.1107/S0365110X65003201 ↗
30. Electronic properties and phase transformations in CoMoO4 and NiMoO4: XANES and time-resolved synchrotron XRD studies10.1021/jp972137q ↗
31. Infrared and Raman spectroscopic studies of the polymorphic forms of nickel, cobalt and ferric molybdates10.1016/0020-0891(87)90072-8 ↗
32. Revised effective ionic radii and systematic studies of interatomic distances in halides and chalcogenides10.1107/S0567739476001551 ↗
33. Normal mode determination in crystals10.1002/jrs.1250100152 ↗
34. Polarized Raman spectrum and normal coordinate analysis of α-MnMoO410.1002/jrs.1250190312 ↗
35. Enhanced field emission performance of NiMoO4 nanosheets by tuning the phase10.1016/j.apsusc.2017.02.177 ↗
36. Commission Internationale de L’Eclairage · 1978
37. XIII - the development of the CIE 1976 (L* a* b*) uniform colour space and color-difference formula10.1111/j.1478-4408.1976.tb03301.x ↗
38. Weak absorption tails in amorphous semiconductors10.1103/PhysRevB.5.3144 ↗
39. Structural and photocatalytic examination of CoMoO4 nanopowders synthesized by GNP method10.1016/j.materresbull.2017.10.015 ↗
40. Influence of the matrix on the red emission in europium self-activated orthoceramics10.1021/acs.jpcc.5b05473 ↗
41. Photoluminescence of single-phased white light emission materials based on simultaneous Tb3+, Eu3+ and Dy3+ doping in CaWO4 matrix10.1016/j.jallcom.2016.11.378 ↗
42. Brightly luminescence and color-tunable CaMoO4:RE3+ (RE = Eu, Sm, Dy, Tb) nanofibers synthesized through a facile route for efficient light-emitting diodes10.1007/s10853-017-1888-6 ↗
43. Behaviour of the Eu3+ 5D0→7F0 transition in CaMoO4 powellite type ceramics under Ar and Pb ions implantation10.1016/j.optmat.2011.05.004 ↗
44. The luminescence of NaxEu3+(2-x)/3MoO4 scheelites depends on the number of Eu-clusters occurring in their incommensurately modulated structure10.1039/C1SC00289A ↗
45. Characterization of powellite-based solid solutions by site-selective time resolved laser fluorescence spectroscopy10.1039/c3dt50146a ↗
46. Incorporation of europium (III) into Scheelite-related host matrixes ABO4 (A = Ca2+, Sr2+, Ba2+; B = W6+, Mo6+): role of A and B sites on the dopant site distribution and photoluminescence10.1021/acs.inorgchem.7b02211 ↗
47. Synthesis and spectroscopic properties of monoclinic α-Eu2(MoO4)310.1021/jp5040739 ↗
48. Correlated color temperature as an explicit function of chromaticity coordinates10.1002/col.5080170211 ↗
49. Optical properties of undoped NdTaO4, ErTaO4 and YbTaO4 ceramics10.1016/j.jlumin.2016.06.054 ↗
50. Wall rock-like Y2O3 nanorods by hydrothermal synthesis and their luminescence properties10.1166/sam.2012.1317 ↗
51. Spectral and CIE parameters of red emitting Gd3Ga5O12:Eu3+ phosphor10.1016/j.jlumin.2014.11.010 ↗