Identifying iron-bearing nanoparticle precursor for thermal transformation into the highly active hematite photo-fenton catalyst
Author
Šutka, Anna
Šutka, Andris
Vanags, Martinsh Š.
Spule, Arnita
Eglītis, Raivis
Vihodceva, Svetlana
Smits, Krisjanis
Tamm, Aile
Mežule, Linda
Date
2020Metadata
Show full item recordAbstract
The hematite photo-Fenton catalysis has attracted increasing attention because it offers strong oxidation of organic pollutants under visible light at neutral pH. In the present work, aqueous synthesis of hematite photo-Fenton catalysts with high activity is demonstrated. We compare photo-Fenton activity for hematite obtained by hydrolyzation at 60◦C or by a thermally induced transformation from iron-bearing nanoparticles, such as amorphous iron oxyhydroxide or goethite. A link between their structure and visible light photo-Fenton reactivity is established. The highest activity was observed for hematite obtained from goethite nanowires due to oblong platelet-like structure, high surface area and the presence of nanopores.