title: Sonochemically prepared PbWO4 tetragonal-bipyramidal microcrystals and their photoluminescence properties.
abstract: Lead tungstate (PbWO4) microcrystals were synthesized for the first time, via different concentrations of PVA assisted sonochemical process. The concentration of PVA acts as a structure directing agent and played an important role in the morphological control of resulting PbWO4 microcrystals. The product PbWO4 composing of Pb, W and O and WO stretching vibration band of WO4 tetrahedrons were confirmed through XRD, FTIR, FESEM and EDS. The TG/DTA curves showed that the particles are crystallized at room temperature itself and the thermal stability of the product is really good. The optical properties of the product shows extraordinarily high room temperature photoluminescence intensity compared to without PVA assisted product.
authors.affiliation: Department of Physics, Manonmaniam Sundaranar University, Tirunelveli 627 012, Tamil Nadu, India.
authors.forename: S
authors.initials: S
authors.lastname: Kannan
authors.affiliation: Department of Physics, Manonmaniam Sundaranar University, Tirunelveli 627 012, Tamil Nadu, India. Electronic address: kmohanraj@gmail.com.
authors.forename: K
authors.initials: K
authors.lastname: Mohanraj
authors.affiliation: CISL, Department of Physics, Annamalai University, Annamalai Nagar 608 002, Tamil Nadu, India.
authors.forename: G
authors.initials: G
authors.lastname: Sivakumar
mesh_terms: D003460:Crystallization / Q000379:methods; D049449:Luminescence; D049408:Luminescent Agents / Q000737:chemistry*; D011142:Polyvinyl Alcohol / Q000737:chemistry; D013010:Sonication / Q000379:methods; D017973:Tungsten Compounds / Q000737:chemistry*
chemical_list: D049408:Luminescent Agents; D017973:Tungsten Compounds; C481386:lead tungstate; D011142:Polyvinyl Alcohol
keywords: PVA; PbWO(4); Photoluminescence; Ultrasonication