3 years ago

Fe doped CeO2 nanosheets as Fenton-like heterogeneous catalysts for degradation of salicylic acid

Fe doped CeO2 nanosheets as Fenton-like heterogeneous catalysts for degradation of salicylic acid
Fe doped CeO2 nanosheets with various Fe/Ce ratios were synthesized by solvothermal method (ST) and catalytic performances were evaluated by the degradation of salicylic acid (SA) in the presence of H2O2 (Fenton-like oxidation). The Fe-CeO2 mixed oxides were characterized by SEM, TEM, XRD, EPR, Raman, H2-TPR and XPS, which indicated that 2% Fe doped CeO2 nanosheets (2Fe-CeO2) showed the largest concentration of surface oxygen vacancies and the highest catalytic activity under the optimum reaction conditions due to the complex adsorption of SA and H2O2 on the surface Ce3+. DMPO spin trapping EPR studies and analysis of intermediate products by LC-MS indicated that superoxide species (O2 /HOO ) played a crucial role in the oxidation degradation process, meanwhile, the probable pathway of SA degradation was proposed. The strong adsorption of not-fully degraded low molecular weight organic acids (LMWOAs) on the active sites decreased the reusability of 2Fe-CeO2 catalyst, however, the catalytic activities could be recovered by a simple calcination treatment in air atmosphere.

Publisher URL: www.sciencedirect.com/science

DOI: S1385894717314067

You might also like
Never Miss Important Research

Researcher is an app designed by academics, for academics. Create a personalised feed in two minutes.
Choose from over 15,000 academics journals covering ten research areas then let Researcher deliver you papers tailored to your interests each day.

  • Download from Google Play
  • Download from App Store
  • Download from AppInChina

Researcher displays publicly available abstracts and doesn’t host any full article content. If the content is open access, we will direct clicks from the abstracts to the publisher website and display the PDF copy on our platform. Clicks to view the full text will be directed to the publisher website, where only users with subscriptions or access through their institution are able to view the full article.