Journal
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
Volume 341, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2023.123287
Keywords
Iron oxide catalyst; Carbon nanofiber; Redox conversion of water contaminants; Reactive oxygen species generation; Catalysis for water treatment
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This study demonstrates the use of Fe2O3/CNF as a heterogeneous Fenton-like catalyst for simultaneous removal of various organic and inorganic contaminants without the need for external energy input and chemical reagents. The Fe2O3/CNF exhibits notable activities for spontaneous oxidative degradation and reductive transformation in ambient solution, with a synergistic effect for removing dual contaminants.
This study demonstrated the performance of Fe2O3 nanorods-loaded carbon nanofiber sheet (Fe2O3/CNF) as a heterogeneous Fenton-like catalyst for simultaneous removal of various organic and inorganic contaminants without external energy input and chemical reagents. Fe2O3/CNF exhibited notable activities for spontaneous oxidative degradation and reductive transformation in ambient solution, with a synergistic effect for removing dual contaminants (organic||inorganic). The synergistic redox conversions on Fe2O3/CNF were facilitated by the in-situ generation of oxidant and reductant. The additional oxidant can be generated by the reaction of chromium species with in-situ produced H2O2 while the additional reductant can be generated by the incomplete oxidation of organic contaminants. Various spectroscopic characterizations and mechanistic analyses suggest that simul-taneous redox conversions are induced by spontaneous electron transfers on Fe2O3/CNF. Furthermore, a flow-reactor equipped with Fe2O3/CNF achieved the simultaneous removal of dual contaminants, making it an effective reactive filter that operates without chemical reagents for water treatment.
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