Luminescence of MWO4 (M =Ca, Sr, Ba and Pb) Prepared by Solvothermal Reaction
MWO4 (M = Ca, Sr, Ba and Pb) was solvothermally prepared using metallic nitrates and sodium tungstate in 25/5 volume ratios of glycerol/water (SGL) and propylene glycol/water (SPG) at 160 oC for 6 h. XRD revealed the presence of MWO4 single phase with tetragonal scheelite structure. The strong W-O stretching band of WO4 tetrahedrons was detected at 705-875 cm-1. The product images show nano-sized particles in basic SGL and SPG solvents and flower-like particles in SPG solvent with pH of 6.7. Central peaks of the luminescent spectra are 445, 446, 443 and 440 nm, respectively.
Byung Tae Ahn, Hyeongtag Jeon, Bo Young Hur, Kibae Kim and Jong Wan Park
T. Thongtem et al., "Luminescence of MWO4 (M =Ca, Sr, Ba and Pb) Prepared by Solvothermal Reaction", Solid State Phenomena, Vols. 124-126, pp. 315-318, 2007