Gadolinium doped tin dioxide nanoparticles: An efficient visible light active photocatalyst

Abdullah M. Al-Hamdi, Mika Sillanpää, Joydeep Dutta*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

31 Citations (Scopus)


Photocatalytic degradation of phenol with sol-gel prepared rare earth doped tin dioxide (SnO2) nanoparticles was reported. Gadolinium doped tin dioxide (SnO2:Gd) nanoparticles were found to absorb higher visible light compared to lanthanum, neodymium and cerium doped materials that were studied in detail. Photocatalytic degradation of phenol under artificial white light and sunlight in the presence of SnO2:Gd nanoparticles was studied with high performance liquid chromatography (HPLC), capillary electrophoresis (CE), total organic carbon (TOC) measurements and the determination of chemical oxygen demand (COD). Clear correlations between the results obtained from these multiple measurements were found, and a kinetic pathway for the degradation process was proposed. Within 150 min of solar irradiation, the TOC of a 10 ppm phenol solution in water was reduced by 95%-99%, thus demonstrating that SnO2:Gd nanoparticles are efficient visible light photocatalysts.

Original languageEnglish
Pages (from-to)1275-1283
Number of pages9
JournalJournal of Rare Earths
Issue number12
Publication statusPublished - Dec 1 2015
Externally publishedYes


  • organic by-products
  • phenol photo-degradation
  • rare earth dopants
  • solar irradiation
  • tin dioxide nanoparticles

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • General Chemistry


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