Engineering FeS2 nanoparticles on tubular g-C3N4 for photo-Fenton treatment of paint wastewater
- Resource Type
- Authors
- Yimin He; Chan Wang; Guoxia Ran; Han Zhu; Qijun Song; Bangqi Wei
- Source
- Chinese Chemical Letters. 33:3073-3077
- Subject
- Electron transfer
Materials science
Wastewater
Chemical engineering
law
Composite number
Molecule
Nanoparticle
Heterojunction
Calcination
General Chemistry
Catalysis
law.invention
- Language
- ISSN
- 1001-8417
An efficient photo-Fenton catalyst (FeS2@HTCN) was designed by maximizing the synergistic effect of FeS2 nanoparticles and hollow tubular g-C3N4 (HTCN). Molecule self-assembly and molten salts-assisted calcination were used to engineering the hollow structured g-C3N4 before anchoring FeS2 nanoparticles on the walls of HTCN via reflux method. Compared to bulk g-C3N4, the unique structure of HTCN and heterojunction in the composite endowed FeS2@HTCN with more active sites and abundant channels for electron transfer and charge separation. The enriched electrons can improve the Fe3+ recycling and boost Fe2+ catalyzed •OH production via H2O2. As-prepared photo-Fenton catalyst was successfully applied to the treatment of industrial paint wastewater. The paint wastewater with its COD as high as 8200 mg/L can be effectively degraded with 0.2 mol/L H2O2 in 90 min under visible light irradiation. The photo-Fenton system was further evaluated according to the process stability and economic benefit, proving that the strategy presented in this work would be applicable to the treatment of real wastewater.