Preparation of PbLa2(MoO4)4:Er3+/Yb3+ particles via microwave sol–gel route and upconversion photoluminescence properties

Triple molybdate scheelite-type upconversion phosphor NaCaLa(MoO4)3:Er3+/Yb3+: structural and spectroscopic properties

“…To reach a high-quality crystalline state, samples need to be heat treated at 900 °C for 16 h. It should be pointed out that this temperature is optimal for molybdate treatment in air and, earlier, other simple and complex molybdates were formed at close temperatures. 6,7,9,[37][38][39][45][46][47] Besides excellent crystallinity, the selected synthesis route provides a uniform particle morphology. The SEM images of the synthesized (a) NCLM:0.2Er 3+ and (b) NCLM:0.05Er 3+ ,0.45Yb 3+ particles are shown in Fig.…”

“…35,36 The microwave heating is delivered to the material surface by radiant and/or convection heating and the heat energy is transferred to the bulk of the material via conduction. [37][38][39] It is an inexpensive method that provides high-homogeneity powder products and it is easy to scale up the process. Thus, the microwave method is considered a viable alternative approach for the quick synthesis of high-quality luminescent materials.…”

A simple hydrothermal route for the preparation of novel Na–Y–W nano-oxides and their application in dye degradation

“…NaY(WO 4 ) 2 was manufactured through a solution-based method due to the superb individual chemical characteristics and morphology rather than the solid-state approach, which requires high temperature to obtain pure particles. 25 The various synthesis methods applied in the synthesis of NaY(WO 4 ) 2 nanostructures include, solid-state, 26 sol–gel, 27 combustion, 28 and hydrothermal. 29–31 Among all the methods, the hydrothermal method has gained growing attention due to a range of advantages including broad area of materials, purity of products, uncomplicated usage, and short reaction time.…”

Synthesis of Microwave Sol–Gel Derived NaCaLa(WO4)3:Ho3+/Yb3+ Phosphors and Their Spectroscopic Properties

“…The possible doping could be attributed to the very similar radii of the trivalent lanthanide ions and bring to the excellent properties for UC photoluminescence. [28][29][30][31] It represents as a cost-effective process which can give rise to highly homogeneous and stable structures. [6][7][8] There are many rare-earth ions that contribute to the excellent UC properties.…”

“…However, the ternary tungstates with general composition NaMLn(WO 4 ) 3 (M = Ca 3+ , Sr 3+ , and Ba 3+ and Ln = La 3+ , Gd 3+ , and Y 3+ ) have not been reported up to now. The microwave‐assisted sol–gel synthesis has the advantages, such as a very short time for preparation and well‐defined morphology with small‐sized particles and stable UC luminescent properties with high purity of final polycrystalline samples . It represents as a cost‐effective process which can give rise to highly homogeneous and stable structures.…”