Binary α‐Fe2O3–Co3O4 nanostructures for advanced oxidation process: Role of synergy for enhanced catalysis. (19th July 2020)

• Record Type: Journal Article
• Authors: Hazarika, Kumar Kashyap; Hazarika, Debashis; Bharali, Pankaj
• Is Part Of: Applied organometallic chemistry. Volume 34:Number 11(2020)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2020-07-19
• Subjects: advanced oxidation process -- catalyst -- degradation -- methylene blue -- α‐Fe2O3–Co3O4; Organometallic chemistry -- Periodicals; Organometallic compounds -- Periodicals; 547.05
• DOI: 10.1002/aoc.5920
• Languages: English
• ISSNs: 0268-2605

Abstract

Abstract : Iron and its binary oxides are meticulously exploited for environmental remediations. However, only limited studies have been carried out on the degradation of industrial organics by advanced oxidation process. In this study, iron oxide, cobalt oxide, and iron–cobalt binary oxides were synthesized by a modified hydrothermal method as heterogeneous Fenton‐like catalysts for the removal of methylene blue (MB) from wastewaters. The oxide nanostructures were characterized by different analytical techniques. Studying the effects of various parameters such as catalyst dose, MB concentration, and H2 O2 concentration, the reaction conditions were optimized to enhance the removal of MB dye. The results revealed that α‐Fe2 O3 –Co3 O4 shows much higher activity than both Co3 O4 and α‐Fe2 O3 for the degradation of MB at room temperature and beyond. The binary α‐Fe2 O3 –Co3 O4 shows degradation efficiency of 96.4% at 65 °C within 60 min. Furthermore, the binary α‐Fe2 O3 –Co3 O4 catalyst retains its activity for up to four successive cycles. A probable mechanism is also proposed, involving the generation of ‧OH radical as well as Fe 2+ /Fe 3+ or Co 2+ /Co 3+ redox couple of the binary α‐Fe2 O3 –Co3 O4 catalyst. Abstract : Nanostructured α‐Fe2 O3 –Co3 O4 shows high degradation efficiency for persistent organic pollutant up to 96.4% via advanced oxidation process. The remarkable activity is due to the generation of ‧OH radical along with the presence of Fe 2+ /Fe 3+ or Co 2+ /Co 3+ couples.