Emissions and photocatalytic selectivity of SrWO4:Ln3+ (Eu3+, Tb3+, Sm3+ and Dy3+) prepared by a supersonic microwave co-assistance method

Abstract

The chemical effects of high intensity ultrasound and microwave irradiation on lanthanide (Eu(3+), Tb(3+), Sm(3+) and Dy(3+)) activated SrWO(4) phosphors were extensively studied. Four classes of characteristic optically active materials (red, green, orange-red and blue-yellow) with striking luminescence were facilely prepared under very low temperature (70 °C) in 45 min. Particularly, Sm(3+), Dy(3+) and Eu(3+) doped strontium tungstates were visible-light driven emissive. The photocatalytic properties of these luminescent lanthanide doped tungstates were systematically examined by investigating the degradation behavior of different dyes.

Synthesis of Sm3+ and Dy3+ doped LaBWO6 for evaluation as potential materials in luminescent display applications

“…A similar CT band was observed in the 146 Dy 3+ doped LaBWO 6 in our experiments(Fig. 5).which was attributed to an electric-dipole transition[8].Commission International de I ' Eclairage (CIE) 1931 x-y chroma-155 ticity diagram of La 0.94 Sm 0.06 BWO 6 phosphors were presented in…”

Studies on multifunctional behaviour of Cr doped SrWO4 Compounds

“…SrWO [17,18,27]. Due to their featured crystal structure, rare earth doped SrWO 4 materials have been proposed as a potential candidate for various electro-optical and scintillating device applications [18][19][20][21][22][23][24][25][26][27]. From earlier reports, it was found that the doping of Nd 3?…”

“…compounds synthesized by hydrothermal method exhibits interesting and promising green phosphor for fluorescent lamp applications [22]. Zheng et al [23] reported that the rare earth doped SrWO 4 compounds synthesized by supersonic microwave co-assistance method showing enhanced photocatalytic behaviour. Recently, Xu et al [24] reported that the Eu 3?…”

“…Various synthesis methods such as solid state reaction [30], cyclic microwave [31,32] electrochemical [33], chemical precipitation [34], hydrothermal [23,35,36] and electro spinning process have been employed for the synthesis of SrWO 4 compounds with desired morphology [30][31][32][33][34][35][36][37]. Since conventional ceramic method needs high temperature treatment and long processing time, simple chemical precipitation method was adopted for the synthesis of nanoparticles.…”

“…The wide band gap semiconducting materials such as divalent metal tungstates (AWO 4 , where A = Ca, Sr, B and Pb) have been denoted as an important class of electrooptic materials, due to their peculiar physical properties and found used in the field of display devices, scintillating materials, humidity sensors, light emitting diodes (LEDs), solid state Raman lasers, optical fibers and catalysts [17][18][19][20][21][22][23]. Among various AWO 4 materials, Strontium Tungstate (SrWO 4 ) has attracted a great deal of attention in recent years because of their intriguing luminescence and structural properties [24][25][26][27].…”