Facile synthesis of pyrite FeS2 on carbon spheres for high-efficiency Fenton-like reaction.
Chemosphere
; 355: 141799, 2024 May.
Article
em En
| MEDLINE
| ID: mdl-38554876
ABSTRACT
Designing iron-based catalysts for Fenton-like reactions with peroxymonosulfate (PMS) as oxidants have attracted growing attentions. Herein, pyrite FeS2 supported on carbon spheres (FeS2@C) is synthesized by a facile low-temperature method. The FeS2@C/PMS system can degrade carbamazepine (CBZ) effectively in a wide pH range. Sulfate radicals (SO4·-), hydroxyl radicals (·OH), superoxide radical (O2·-), and singlet oxygen (1O2) are the responsible reactive oxygen species (ROSs) for CBZ degradation. Moreover, in the simulated fixed-bed reactor, the FeS2@C/PMS system can maintain a high CBZ removal ratio of >95% for than 8 h, exhibiting its excellent stability. The outstanding performance of FeS2@C/PMS system is attributed to the presence of carbon spheres and lattice S2-, which together promote the Fe(III)/Fe(II) redox cycle. The FeS2@C is a promising catalyst due to its facile synthesis, low cost, high efficiency, and excellent stability to activate PMS for organics degradation.
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Texto completo:
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Base de dados:
MEDLINE
Assunto principal:
Sulfetos
/
Carbono
/
Compostos Férricos
Idioma:
En
Ano de publicação:
2024
Tipo de documento:
Article