Chinese Journal of Catalysis ›› 2011, Vol. 32 ›› Issue (6): 978-982.DOI: 10.1016/S1872-2067(10)60221-5

• Research papers • Previous Articles     Next Articles

Photocatalytic Synthesis of Gold Nanoparticles Using Preyssler Acid and Their Photocatalytic Activity

Ali AYATI1, Ali AHMADPOUR1,*, Fatemeh F. BAMOHARRAM2, Majid M. HERAVI3, Hamed RASHIDI1   

  1. 1Department of Chemical Engineering, Ferdowsi University of Mashhad, Mashhad, Iran; 2Department of Chemistry, School of Sciences, Islamic Azad University, Mashhad Branch, Mashhad, Iran; 3Department of Chemistry, School of Sciences, Alzahra University, Tehran, Iran
  • Received:2010-12-14 Revised:2011-03-14 Online:2011-06-21 Published:2014-10-31

Abstract: Preyssler acid H14[NaP5W30O110] was used as reducing agent and stabilizer for the synthesis of gold nanoparticles by photolysis of Au(III)/Preyssler acid/propan-2-ol solution. Preyssler acid plays both the role of transferring electrons from propan-2-ol to Au(III) and stabilizing the nanoparticles. Propan-2-ol was used as sacrificial reagent for the photoformation of reduced Preyssler acid. Gold nanoparticles (Au NPs) were characterized by UV-Vis spectroscopy, transmission electron microscopy (TEM), and particle size distribution (PSD) measurements. The synthesized Au NPs had a uniform hexagonal morphology and their size was about 17 nm. The catalytic performance of these NPs for photodegradation of methyl orange (MeO) was investigated in aqueous solution. UV-Vis studies showed that Au NPs can catalyze photodegradation of this azo dye. The pseudo-first-order rate constants were also calculated for this reaction.

Key words: gold, nanoparticle, polyoxometalate, Preyssler acid, photodegradation, methyl orange