Synthesis of multiwalled carbon nanotubes supported manganese and cobalt zinc oxides nanoparticles for the photodegradation of malachite green

Noor Zada, Idrees Khan, Khalid Saeed

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)

Abstract

Multiwalled carbon nanotubes (MWNTs) supported and unsupported bimetallic zinc and manganese oxides nanoparticles (Zn–Mn NPs) were synthesized by wet chemical precipitation method. Zn–Mn and MWNTs/Zn–Mn oxides NPs were used as photocatalysts for the photodegradation of malachite green in aqueous medium under UV irradiation. The photodegradation study of malachite green was carried out by UV/vis spectrophotometer. The Mn–Zn and MWNTs/Mn–Zn oxides NPs degraded about 93% and 96% of dye, respectively, within 2 h of irradiation time. Effect of several parameters like time, pH, catalyst dosage and concentration of dye on the photocatalytic degradation was studied. The optimum conditions were obtained at pH 9 (93% dye degraded in 1.5 h), at 0.0435 g of catalyst (76.04% of dye degraded in 1 h), at 12.5 ppm dye concentration (88.41% dye degraded in 45 min). The activity of recovered catalyst was also examined.

Original languageEnglish
Pages (from-to)1477-1485
Number of pages9
JournalSeparation Science and Technology (Philadelphia)
Volume52
Issue number8
DOIs
Publication statusPublished - 24 May 2017
Externally publishedYes

Keywords

  • Bimetallic catalyst
  • malachite green
  • multiwalled carbon nanotubes
  • photocatalytic degradation

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