Microwave-electrochemical formation of colloidal zinc oxide at fluorine doped tin oxide electrodes

Liza Rassaei, Robben Jaber, Stephen E Flower, Karen J Edler, R G Compton, Tony D James, Frank Marken

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Colloidal ZnO is obtained during microwave-enhanced electrochemical deposition experiments from an aqueous solution containing 0 1 M Zn(NO3)(2) and 0 02 M H2O2 via repetitive negative going potential cycles from 03 to 0 8 V vs SCE The effects of temperature and temperature gradients on ZnO electro formation at fluorine doped tin oxide (FTO) electrodes are investigated with both a con ventional thermostated bath system (isothermal) and an in situ microwave electrochemistry system (non-isothermal) Mainly electrodeposition of ZnO is observed in uniformly heated stagnant solution and predominantly the electro-formation of ZnO colloid is observed in the presence of microwave-induced temperature gradients in a flowing solution For the ZnO colloid prepared via microwave activation SAXS data suggests an average particle radius of ca 18 nm The increase of ZnO nanoparticle concentration during repetitive potential scans is followed by photoluminescence spectroscopy A possible mechanism for ZnO colloid formation during electrochemical reduction of H2O2 is suggested
Original languageEnglish
Pages (from-to)7909-7915
Number of pages7
JournalElectrochimica Acta
Volume55
Issue number27
DOIs
Publication statusPublished - 30 Nov 2010
Event60th Annual Meeting of ISE - Beijing, China
Duration: 16 Aug 200921 Aug 2009

Keywords

  • controlled colloidal synthesis
  • electrodeposition
  • microwave synthesis
  • voltammetry
  • FTO
  • zinc oxide nanoparticles
  • electrosynthesis
  • SAXS
  • zinc oxide film

Fingerprint Dive into the research topics of 'Microwave-electrochemical formation of colloidal zinc oxide at fluorine doped tin oxide electrodes'. Together they form a unique fingerprint.

Cite this