Photocatalytic degradation of highly toxic dyes using chitosan-g-poly(acrylamide)/ZnS in presence of solar irradiation

Deepak Pathania, Divya Gupta, Ala'a H. Al-Muhtaseb, Gaurav Sharma, Amit Kumar, Mu Naushad, Tansir Ahamad, Saad M. Alshehri

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101 Citations (Scopus)


The photocatalytic degradation of methyl orange (MO) and congo red (CR) dyes from aqueous solution have been attempted using chitosan-g-poly(acrylamide)/ZnS (ChPA/ZS) nanocomposite materials. Nanocomposites were successfully prepared in the aqueous solution through microwave radiations. Band gap property of composite was studied using UV–vis spectrophotometer. The ChPA/ZS nanocomposite was characterized by various techniques. The photocatalytic activity of ChPA/ZS was evaluated for methyl orange and congo red dyes degradation in aqueous solution under simulated solar irradiation. The degradation of dyes was recorded higher for ChPA/ZS nanocomposite. After 2 h of irradiation, 75% of congo red dye was degraded and 69% of methyl orange was degraded after 4 h of simulated solar irradiation. ChPA/ZS composite showed a higher rate of dye degradation owing to outstanding adsorbing properties of cross linked polyacrylamide.

Original languageEnglish
Pages (from-to)61-68
Number of pages8
JournalJournal of Photochemistry and Photobiology A: Chemistry
Publication statusPublished - Oct 1 2016



  • Chitosan
  • Congo red
  • Methyl orange
  • Photocatalytic
  • X-ray photoelectron spectroscopy
  • Zinc sulphide

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Physics and Astronomy(all)

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