Simple Preparation of V2O5 Nanostructures and Their Characterization

摘要

Low-dimensional nanostructures of vanadium oxides and their derivatives have attracted a great deal of interests due to their novel physicochemical properties and potential applications to high-energy lithium batteries, chemical sensors, nanoresonators, and field effect transistors. Layer-structured vanadium pentoxide is one of the most studied vanadium oxides despite its low discharge voltages, low electric conductivity, and slow diffusion kinetics of lithium ions. In order to improve the performance of lithium batteries by employing vanadium pentoxide as a cathode material, a few methods have been used to prepare vanadium pentoxide with better characteristics, which includes the use of aerogels, xerogels, nanocomposites of LiV2O5 with electronically conducting organic polymers and nano-structured materials. There have been a few recent attempts to develop synthetic methods for nanomaterials of vanadium oxides but preparation of single-crystal vanadate nanostructures still remains challenging. Generally, nanomaterials are prepared in acidic media but very few studies report their synthesis using basic media. Here, we report synthesis of nanosized vanadium oxides by thermal decomposition of ammonium vanadate nanomaterials prepared via refluxing and precipitation methods in both basic and acidic media.