HYDROTHERMAL METHOD OF SYNTHESIS OF VANODIUM PENTOXIDE V2O5 NANOBELTS WITH INTENSIVE MIXING

Abstract

The process of synthesis of vanadium pentoxide nanobelts by hydrothermal method using intensive stirring of a suspension of V2O5 powder in aqueous NaCl solution was studied. The peculiarity of the hydrothermal method of synthesis of single-crystal V2O5 nanobelts is its ecological safety and high efficiency in terms of large-scale production by simple intensive mixing of the suspension of V2O5 powder in aqueous NaCl solution. No other specific conditions are required for the growth of nanostructures in this approach. Preparation of the suspension was as follows: 2 moles of NaCl was dissolved in 150 ml of distilled water, then 10 g of commercial V2O5 powder with particle sizes in the range from 10-100 μm was added. For the synthesis of V2O5 nanobelts, the test suspension was subjected to intensive mechanical stirring. During mixing, the temperature, pH of the solution, the viscosity of the test suspension were measured. The synthesized nanobelts were investigated by scanning electron microscopy (SEM) and X-ray diffractometry.

The technological possibility of application the hydrothermal method in combination with intensive mechanical stirring of the solution for the synthesis of vanadium pentoxide nanobelts from powder with a particle size of 10-100 μm was confirmed. The characteristic feature of the process of structural transformation of particles into V2O5 nanobelts is the reduction in pH of the solution, which can be used as an indicative integral characteristic of the rate of synthesis of vanadium pentoxide nanobelts in industrial production.

The important factors that can critically affect the process of hydrothermal synthesis of nanostructures during intensive mixing are the composition of the suspension, its temperature, mixing speed. The investigation of the influence of these factors will be carried out in the following works.