Novel guar gum/Al2O3 nanocomposite as an effective photocatalyst for the degradation of malachite green dye

Deepak Pathania, Rishu Katwal, Gaurav Sharma*, Mu Naushad, Mohammad Rizwan Khan, Ala'a H. Al-Muhtaseb

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

97 Citations (Scopus)


Guar gum/Al2O3 (GG/AO) nanocomposite was prepared using simple and cost effective sol-gel method. This nanocomposite was characterized by several analytical techniques viz. scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), thermal analysis (TGA/DTA), Fourier transform infrared spectroscopy (FTIR) and ultraviolet-visible spectroscopy (UV-vis). The FTIR analysis confirmed that GG/AO composite material was formed. TEM images inferred the particle size in the range between 20 and 45 nm. GG/AO nanocomposite exhibited good photocatalytic performance for malachite green (MG) dye (dye initial concentration 1.5 × 10-5 M) degradation from aqueous phase. The adsorption followed by photocatalysis and coupled adsorption/photocatalysis reaction achieved about 80% and 90% degradation of MG dye under solar irradiation. Antibacterial test showed the excellent activity of GG/AO nanocomposite against Staphylococcus aureus.

Original languageEnglish
Pages (from-to)366-374
Number of pages9
JournalInternational Journal of Biological Macromolecules
Publication statusPublished - Jun 1 2016


  • Antibacterial activity
  • Dyes
  • Nanocomposite
  • Photodegradation

ASJC Scopus subject areas

  • Biochemistry
  • Molecular Biology
  • Structural Biology


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