Kinetic study of Cu(II) adsorption on nanosized BaTiO3 and SrTiO3 photocatalysts

Yen-Hua Chen, Yu Der Chen

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41 Citations (Scopus)

Abstract

In this study, nanoparticles with perovskite structure (nano-SrTiO3 and nano-BaTiO3) were synthesized via a co-precipitation method, and their photocatalytic and adsorption characteristics were investigated. Both of them exhibited some photocatalytic activity and possessed a high adsorption capacity for copper ions. Further, the pseudo-first-order model was found to be more suitable to fit the experimental data. Moreover, it suggested that the Langmuir model was more adequate in simulating the adsorption isotherm. The maximum adsorption capacity was 370.4mg/g and 200.0mg/g for nano-SrTiO3 and nano-BaTiO3, respectively. The negative apparent free energy confirmed that the Cu2+ adsorption onto the nano-photocatalysts was a spontaneous process. The underlying mechanism of adsorption of Cu(II) onto nano-perovskites could be due to the ion exchange and surface complexation. From the results, SrTiO3 and BaTiO3 nanoparticles may be an effective material for Cu2+ removal and, together with its photocatalytic activity, may be suitable for environmental remediation applications.

Original languageEnglish
Pages (from-to)168-173
Number of pages6
JournalJournal of Hazardous Materials
Volume185
Issue number1
DOIs
Publication statusPublished - 2011 Jan 15

All Science Journal Classification (ASJC) codes

  • Health, Toxicology and Mutagenesis
  • Pollution
  • Waste Management and Disposal
  • Environmental Chemistry
  • Environmental Engineering

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