The Morphology-Controlled Synthesis of Monoclinic-CaV_2O_6 Nanoribbons via Hydrothermal Method

摘要

Calcium vanadate is one of the most intriguing metal vanadates and has been intensively researched during recent years. However, there are few reports in the literature on the morphology-designed fabrication without surfactant of one-dimensional m-CaV_2O_6 nanostructures. The scientific problems are the kinetic control of nucleation and growth process along certain direction. In this paper, the shape-controlled synthesis, characterization, and growth mechanism of monoclinic (m)-CaV_2O_6 nanostructures with uniform size were reported. The formation of different morphologies can be obtained via a simple hydrothermal approach through varying the reaction parameters, such as concentration of precursors as well as fabricating time. This suitable condition for the synthetic route was systematically selected. It was found that the transformation from microribbons to nanoribbons was readily achieved by simply controlling the reaction parameters. The shape evolution at different time established that the growth mechanism of these nanoribbons was dominated by the Ostwald ripening and splitting process. The research on the shape changes of microanoarchitectures may also explore functional performances for other one-dimensional alkaline-earth metal vanadium-based materials.