Structural, vibrational study and UV photoluminescence properties of the system Bi_(2−x)Lu_(x)WO₆ (0.1 ≤ x ≤ 1)

Abstract

This study on bismuth lutetium tungstates presents, for the first time, correlations between structure, vibrational and photoluminescence properties in the case of solid solutions Bi2−xLuxWO6. The origin of luminescence signals under UV excitation is discussed.

Photo/Electrocatalytic Properties of Nanocrystalline ZnO and La–Doped ZnO: Combined DFT Fundamental Semiconducting Properties and Experimental Study

“…For 5%wt La rate, the refined Zn/La occupancy at the Wyckoff position 2b site was in excellent agreement with the nominal composition. The minimization was carried out using the reliability index parameters such as Braggs factors ( R Bragg ) comparing the calculated and observed intensities (I ca l and I obs ), R exp expected factors, R wp and the goodness of fit GoF ,. The difference between the calculated and experimental profiles is shown in figure b .…”

Structural analysis and optical properties of the Bi2−xYxWO6 system

“…More evidence for this phenomenon was reported for Bi 2– x Lu x WO 6 (0.4 < x < 1), where the visible-light photoluminescence properties of the solid solution did not change significantly with the composition. 30 The monoclinic russellite phase of Bi 2 WO 6 was reported to have an indirect bandgap that approaches 2.50 eV as the calcination temperature is increased. 31 The best fit for all of our samples was indeed obtained for the indirect transition, and we therefore speculate that the members of the Bi 2– x Y x WO 6 family are also indirect bandgap semiconductors.…”

Congo red removal by PANi/Bi2WO6 nanocomposites: Kinetic, equilibrium and thermodynamic studies

“…Bismuth tungstate Bi2WO6 (BWO) is the simplest member of the Aurivilius family and it is a very promising material due its potential applications in different areas such as photocatalysis [15,16], luminescence, chemical inertness, photo-stability, and environmentally friendly features [17][18][19][20]. The PANi with an extended π-conjugated electron, has recently showed great promises [21] as it is supporter for the large specific surface area and the excellent electronic conductivity due to its important intrinsically conducting polymers.…”