Capping agents as a novel approach to control VO2 nanoparticles morphology in hydrothermal process: Mechanism of morphology control and influence on functional properties

Research output

Abstract

A novel approach to regulate nanoparticles morphology using capping agents (etidronic, succinic, tartaric and salicylic acids) in hydrothermal synthesis is presented. UV–Vis and FTIR spectra showed that influence of the capping agents is based on the interaction with particles surface during the solid phase formation. For na-VO 2 nanorods a 1st order phase transition at 275 K was demonstrated using vibration sample magnetometry. Differential scanning calorimetry showed that this transition is accompanied by 2nd order transition at 320 K. Decrease in rods thickness and length for sal-VO 2 and suc-VO 2 made the transition less expressed and its temperature lowered from 275 to 150 K. Addition of tartaric and etidronic acids led to change of particles shape from rods to spheres and eliminated all the transitional changes in magnetic properties. Charge-discharge tests revealed that initial discharge capacity of nanorods was 100 mA h g −1, which is three times higher than that of spheres.

Original languageEnglish
Article number114519
JournalMaterials Science and Engineering B: Solid-State Materials for Advanced Technology
Volume255
Early online date14 Mar 2020
DOIs
Publication statusPublished - 2020

Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Fingerprint Dive into the research topics of 'Capping agents as a novel approach to control VO2 nanoparticles morphology in hydrothermal process: Mechanism of morphology control and influence on functional properties'. Together they form a unique fingerprint.

  • Cite this