Synthesis of BaMoO₄ Nestlike Nanostructures Under a New Growth Mechanism

Abstract

Novel BaMoO4 nestlike nanostructures assembled with single-crystal nanosheets have been successfully synthesized by using PVP (K30) as capping reagents under hydrothermal conditions. Detailed proofs indicated that the process of crystal growth was dominated by a crystallization−dissolution−recrystallization−self-assembly growth mechanism. The morphology of BaMoO4 evolved from several micro-compressed decahedrons to two-dimensional (2-D) nanoplates and to three-dimensional (3-D) nestlike nanostructures. The compressed decahedrons with rough surfaces synthesized in a very short time should have larger numbers of lattice defects which induce its state to be metastable. Room-temperature photoluminescence (PL) spectra also reflected the evolution of intrinsic lattice and morphology. Both the concentration of PVP aqueous solutions and the concentration of initial reagents play important roles in the formation of the BaMoO4 nestlike nanostructure.

Zinc blende versus wurtzite ZnS nanoparticles: control of the phase and optical properties by tetrabutylammonium hydroxide

“…In previous studies, 9 we suggested that the growth of ZnS obtained by MAS can be described via a nucleationdissolution-recrystallization mechanism, and this mechanism is responsible for the fast nucleation of the ZnS small particles which aggregate into a spherical morphology to minimize their surface energy. In general, the nucleation-dissolutionrecrystallization mechanism occurs using the MAS method, 9,38,40,64 which is considered highly sensitive to relative rates of amorphous solid particle dissolution and nucleation of the crystalline phase. 17,38,[64][65][66][67][68] As a consequence, this mechanism involves the formation of a high concentration of aggregated nanoparticles with predominant growth controlled by the coalescence process.…”

“…In general, the nucleation-dissolutionrecrystallization mechanism occurs using the MAS method, 9,38,40,64 which is considered highly sensitive to relative rates of amorphous solid particle dissolution and nucleation of the crystalline phase. 17,38,[64][65][66][67][68] As a consequence, this mechanism involves the formation of a high concentration of aggregated nanoparticles with predominant growth controlled by the coalescence process. 39 EDXS reveals that the products contain Zn and S which are in excellent agreement with the stoichiometry of ZnS, indicating the purity of the sample processed by the MAS method.…”

Microwave-assisted synthesis, characterization and photoluminescence of shuttle-like BaMoO4 microstructure

“…Recently, alkaline earth molybdate materials with a scheelite-type structure have attracted much interest because of their luminescent behavior, electro-optical properties, structural properties and potential applications [1][2][3]. The green luminescence properties of molybdate of relatively large bivalent cations (Ca, Ba, Pb and Sr with ionic radii >0.99Å) have attracted much attention of many researchers due to their applications in electro-optical industries [2,4].…”

“…The green luminescence properties of molybdate of relatively large bivalent cations (Ca, Ba, Pb and Sr with ionic radii >0.99Å) have attracted much attention of many researchers due to their applications in electro-optical industries [2,4]. Among the molybdate materials, BaMoO 4 with a scheelite structure is an important material in electro-optics, due to its production of blue, green and orange luminescence, and in electro-optical applications, including solid-state lasers and optical fibers [3,5,6]. * E-mail: phuruangrat@hotmail.com In this research, the shuttle-like BaMoO 4 microstructures have been synthesized by microwave method.…”

Effect of process parameters on photophysical properties and barium molybdate phosphors characteristics

“…This method generally leads to a cost reduction due to low synthesis temperatures; it also promotes high yield reactions and enables large volume processing [1,2,15]. In a recent study, Luo et al [17] reported BaMoO 4 nest-like nanostructures prepared under hydrothermal conditions. Particles with a controllable size and shape, high crystallinity and low agglomeration can be obtained using this synthetic route [1,2].…”