A novel electrochemical sensor for the detection of enrofloxacin based on a 3D flower-like metal tungstate incorporated reduced graphene oxide nanocomposite.

In recent times metal tungstates have received a lot of attention in the various research field. Accordingly, the CaWO4/RGO (CW/RGO) nanocomposite was prepared by the facile hydrothermal method. The electrocatalytic...

Composition of vapor and thermodynamic characteristics of gaseous molecules of alkali metals tungstates

Calculated and experimental mass spectra (at temperatures region of 1100-1500 K) of alkali metals tungstates are presented. Vapor pressures and thermodynamic characteristic of gaseous alkali metal tungstates are determined.

Electronic structure, polaron formation, and functional properties in transition-metal tungstates

This work establishes a relationship between the electronic structure, polaron formation, and electrochemical activity in transition-metal tungstates.

Mono-Disperse CaWO4 Microsphere with Hierarchical Structures: Room Temperature Synthesis and its Optical Properties

In this report, an inorganic salt assisted micro-emulsion method was reported for the preparation of mono-disperse CaWO4 microspheres with hierarchical structures. The as-obtained microspheres are composed of tiny nanorods, which have been proved by the field emission scanning electronic microscopy (FESEM) and high-resolution transmission electron microscopy (HRTEM) observations. The formation of these hierarchical mono-disperse microspheres is considered to be the synergistic effect of both surfactant and the inorganic salt. Based on the time-dependent experiments, a probable formation mechanism based on surface adsorption and oriented attachment has been proposed. The photoluminescence properties of the microspheres were investigated. The generality of this synthetic method for other metal tungstates were also carefully investigated, which indicates that the morphologies of the final product not only depend on the synthetic conditions, but also depend on the growth habit of the materials.

Surfactant Effect on Formation of CaWO4:Eu3+ Crystals with Distinguished Morphologies in Hydrothermal Ambient

Metal tungstates, expressed by the general formula of MWO4, have important properties and applications in photoluminescence, microwave applications, optical fibers, scintillator materials, humidity sensors, magnetic properties, and catalysts. In this paper, we report a successful synthesis of CaWO4:Eu3+ crystals with various morphologies in mild hydrothermal conditions with surfacntant including sodium citrate, CTAB, PEG and citrate acid (CA). The formation of the crystals are strongly dependent on the employment of surfactant. The surfactant concentration has been found significant influence in the resulting morphologies due to different properties of each one. Extensive characterization have been performed by using X-ray diffraction (XRD), field emission scanning electron microscope (FE-SEM) in search of the formation mechanism of multi-morphological CaWO4:Eu3+ crystals. The growth mechanism of monodispersed CaWO4:Eu3+ crystal are proposed. And the photoluminescence properties were investigated.