Synthesis, photoluminescence, Judd-Ofelt analysis, and thermal stability studies of Dy-doped BaLaZnO phosphors for solid-state lighting applications.

Here, we report a series of white-emitting Ba(La Dy )ZnO ( = 0-7 mol%) phosphors synthesized a high-temperature solid-state reaction. The synthesized phosphor's phase purity and tetragonal crystal structure were confirmed by an X-ray powder diffraction (XRPD) pattern. The wide bandgap characteristic feature was assessed through reflectance spectra, and the estimated bandgap was found to be 4.

DOE-based synthesis of gellan gum-acrylic acid-based biodegradable hydrogels: screening of significant process variables and field studies.

The current study uses the free radical graft copolymerization of acrylic acid as a monomer, ,-methylene-bis-(acrylamide) as a crosslinker and ammonium persulfate as an initiator to synthesise GG-cl-poly(AA) hydrogels based on gellan gum utilising response surface methodology (RSM). A full factorial design was used to obtain the greatest percent swelling ( ), and key process variables were determined using the Pareto chart. To make the procedure cost-effective, a multiple regression model employing ANOVA projected a linear model with a maximum percentage swelling of 556 at the lowest concentration of all three studied factors.