Solid state-synthesized lanthanum orthovanadate (LaVO4) Co-doped with Eu as efficient photoluminescent material

LaVO4 with alkali metal doping for enhanced photocatalytic water splitting

“…The observed phenomena can be ascribed to the presence of vanadium in the V oxidation state (V 5+ ions in VO 4 3À ) within the LaVO 4 samples. 17 In the high-resolution O 1s spectrum (Fig. 3c), there is only one peak for Na-LaVO 4 at 530.11 eV, while there are two peaks for Na-LaVO 4 , at 530.1 eV and 531.47 eV.…”

A bacterial cellulose-based LiSrVO4:Eu3+ nanosensor platform for smartphone sensing of levodopa and dopamine: point-of-care diagnosis of Parkinson's disease

“…51 Finally, the contribution at 519.7 eV can be related to V-OH when moisture is in the sample. 52,53 Fig. 3C shows the XPS spectrum of O 1s, which can be converted into 5 peaks at binding energies of 529.5 eV, 530.4 eV, 531.34 eV, 532.33 eV, and 533.43 eV.…”

Comparative studies of upconversion luminescence and optical temperature sensing in Tm3+/Yb3+ codoped LaVO4 and GdVO4 phosphors

“…Previous reports indicate that monazite type LaVO 4 is an indirect band gap material while tetragonal GdVO 4 is a direct band gap material. 15,35,39,40 For estimation of band gap values, the plots of [F(R)hn] 1/n versus hn for indirect and direct band gap transitions are shown in Fig. 2(b).…”

“…The zircon type yttrium orthovanadate (YVO 4 ) and gadolinium orthovanadate (GdVO 4 ) have been studied for upconversion emission and strong upconversion luminescence is noted in these hosts. 15,16 The LaVO 4 host however, is found to exist in two polymorphs, either tetragonal (t-) zircon type structure or monoclinic (m-) monazite type structure depending upon the reaction methods. 14 Lanthanide ions with a larger ionic radius prefer to choose monazite structure because of its higher oxygen coordination number (9).…”

“…14 Lanthanide ions with a larger ionic radius prefer to choose monazite structure because of its higher oxygen coordination number (9). 15 On the line of YVO 4 and GdVO 4 hosts it is expected that LaVO 4 can be a good candidate for strong upconversion emission which is also revealed by Shao et al 17 It is feasible to create multi-colored emission by doping with various rare earth (Ln 3+ ) ions, such as red from Eu 3+ , green from Er 3+ , and blue from Tm 3+ ions. The LaVO 4 is substantially less expensive and is based on a resource that is far more abundant than Y.…”