Synthesis, characterization, and investigation magnetic and photocatalytic property of cadmium tungstate nanoparticles

Abstract

In this paper, cadmium tungstate (CdWO 4 ) nanoparticles were synthesized via a precipitation method based on the reaction between cadmium nitrate hexahydrate and sodium tungstate dihydrate in water. Besides, three surfactant agents such as sodium dodecyl benzene sulfonate, sodium dodecyl sulfate, and polyethylene glycol were used to investigate their effects on the morphology and particle size of CdWO 4 nanoparticles. According to the vibrating sample magnetometer, cadmium tungstate (CdWO 4 ) nanoparticles indicated a ferromagnetic behavior at room temperature. To evaluate the catalytic properties of nanocrystalline cadmium tungstate, the photocatalytic degradations of methyl orange under ultraviolet light irradiation were carried out. The structural, morphological, magnetic, and optical properties of as-obtained products were characterized by techniques such as XRD, SEM, EDX, VSM, and UV-Vis spectroscopy.

CdWO4:Eu3+ Nanostructures for Luminescent Applications

“…Recently, luminescent materials with different emission colors have been developed in optical, sensing, biomedical, and energy-related applications . As one kind of important inorganic luminescent materials, tungstate has been widely investigated due to the luminescent applications in diverse fields (e.g., lasers, sensors, and optical fibers). − Cadmium tungstate (CdWO 4 ) possessing monoclinic wolframite crystal structure has attracted great attention because of its many advantages such as high average refractive index, good scintillation properties, low-radiation damages, high chemical stability, and high X-ray absorption coefficient. − Therefore, extensive researches have been focused on the development of CdWO 4 for applications in X-ray detectors, phosphors, and optical devices. − As a self-activating phosphor, its luminescence is due to the charge transfer between excited O 2– 2p orbitals and the empty W 6+ 5d orbitals or structure defects. , Many efforts have been made to form CdWO 4 crystals like sol–gel, hydrothermal, molten salt, and microwave methods. − For example, the structure of CdWO 4 (e.g., monoclinic and tetragonal) can be tuned by a hydrothermal method, and the morphologies can be controlled via a sonochemical method . Furthermore, CdWO 4 can be deposited by reduced graphene oxide under hydrothermal conditions, leading to the enhancement of photocatalytic performance .…”